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-rw-r--r--arch/powerpc/kernel/prom_init.c3517
1 files changed, 3517 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c
new file mode 100644
index 000000000..6f7ad8076
--- /dev/null
+++ b/arch/powerpc/kernel/prom_init.c
@@ -0,0 +1,3517 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Procedures for interfacing to Open Firmware.
+ *
+ * Paul Mackerras August 1996.
+ * Copyright (C) 1996-2005 Paul Mackerras.
+ *
+ * Adapted for 64bit PowerPC by Dave Engebretsen and Peter Bergner.
+ * {engebret|bergner}@us.ibm.com
+ */
+
+#undef DEBUG_PROM
+
+/* we cannot use FORTIFY as it brings in new symbols */
+#define __NO_FORTIFY
+
+#include <stdarg.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/init.h>
+#include <linux/threads.h>
+#include <linux/spinlock.h>
+#include <linux/types.h>
+#include <linux/pci.h>
+#include <linux/proc_fs.h>
+#include <linux/delay.h>
+#include <linux/initrd.h>
+#include <linux/bitops.h>
+#include <linux/pgtable.h>
+#include <asm/prom.h>
+#include <asm/rtas.h>
+#include <asm/page.h>
+#include <asm/processor.h>
+#include <asm/irq.h>
+#include <asm/io.h>
+#include <asm/smp.h>
+#include <asm/mmu.h>
+#include <asm/iommu.h>
+#include <asm/btext.h>
+#include <asm/sections.h>
+#include <asm/machdep.h>
+#include <asm/asm-prototypes.h>
+#include <asm/ultravisor-api.h>
+
+#include <linux/linux_logo.h>
+
+/* All of prom_init bss lives here */
+#define __prombss __section(".bss.prominit")
+
+/*
+ * Eventually bump that one up
+ */
+#define DEVTREE_CHUNK_SIZE 0x100000
+
+/*
+ * This is the size of the local memory reserve map that gets copied
+ * into the boot params passed to the kernel. That size is totally
+ * flexible as the kernel just reads the list until it encounters an
+ * entry with size 0, so it can be changed without breaking binary
+ * compatibility
+ */
+#define MEM_RESERVE_MAP_SIZE 8
+
+/*
+ * prom_init() is called very early on, before the kernel text
+ * and data have been mapped to KERNELBASE. At this point the code
+ * is running at whatever address it has been loaded at.
+ * On ppc32 we compile with -mrelocatable, which means that references
+ * to extern and static variables get relocated automatically.
+ * ppc64 objects are always relocatable, we just need to relocate the
+ * TOC.
+ *
+ * Because OF may have mapped I/O devices into the area starting at
+ * KERNELBASE, particularly on CHRP machines, we can't safely call
+ * OF once the kernel has been mapped to KERNELBASE. Therefore all
+ * OF calls must be done within prom_init().
+ *
+ * ADDR is used in calls to call_prom. The 4th and following
+ * arguments to call_prom should be 32-bit values.
+ * On ppc64, 64 bit values are truncated to 32 bits (and
+ * fortunately don't get interpreted as two arguments).
+ */
+#define ADDR(x) (u32)(unsigned long)(x)
+
+#ifdef CONFIG_PPC64
+#define OF_WORKAROUNDS 0
+#else
+#define OF_WORKAROUNDS of_workarounds
+static int of_workarounds __prombss;
+#endif
+
+#define OF_WA_CLAIM 1 /* do phys/virt claim separately, then map */
+#define OF_WA_LONGTRAIL 2 /* work around longtrail bugs */
+
+#define PROM_BUG() do { \
+ prom_printf("kernel BUG at %s line 0x%x!\n", \
+ __FILE__, __LINE__); \
+ __builtin_trap(); \
+} while (0)
+
+#ifdef DEBUG_PROM
+#define prom_debug(x...) prom_printf(x)
+#else
+#define prom_debug(x...) do { } while (0)
+#endif
+
+
+typedef u32 prom_arg_t;
+
+struct prom_args {
+ __be32 service;
+ __be32 nargs;
+ __be32 nret;
+ __be32 args[10];
+};
+
+struct prom_t {
+ ihandle root;
+ phandle chosen;
+ int cpu;
+ ihandle stdout;
+ ihandle mmumap;
+ ihandle memory;
+};
+
+struct mem_map_entry {
+ __be64 base;
+ __be64 size;
+};
+
+typedef __be32 cell_t;
+
+extern void __start(unsigned long r3, unsigned long r4, unsigned long r5,
+ unsigned long r6, unsigned long r7, unsigned long r8,
+ unsigned long r9);
+
+#ifdef CONFIG_PPC64
+extern int enter_prom(struct prom_args *args, unsigned long entry);
+#else
+static inline int enter_prom(struct prom_args *args, unsigned long entry)
+{
+ return ((int (*)(struct prom_args *))entry)(args);
+}
+#endif
+
+extern void copy_and_flush(unsigned long dest, unsigned long src,
+ unsigned long size, unsigned long offset);
+
+/* prom structure */
+static struct prom_t __prombss prom;
+
+static unsigned long __prombss prom_entry;
+
+static char __prombss of_stdout_device[256];
+static char __prombss prom_scratch[256];
+
+static unsigned long __prombss dt_header_start;
+static unsigned long __prombss dt_struct_start, dt_struct_end;
+static unsigned long __prombss dt_string_start, dt_string_end;
+
+static unsigned long __prombss prom_initrd_start, prom_initrd_end;
+
+#ifdef CONFIG_PPC64
+static int __prombss prom_iommu_force_on;
+static int __prombss prom_iommu_off;
+static unsigned long __prombss prom_tce_alloc_start;
+static unsigned long __prombss prom_tce_alloc_end;
+#endif
+
+#ifdef CONFIG_PPC_PSERIES
+static bool __prombss prom_radix_disable;
+static bool __prombss prom_radix_gtse_disable;
+static bool __prombss prom_xive_disable;
+#endif
+
+#ifdef CONFIG_PPC_SVM
+static bool __prombss prom_svm_enable;
+#endif
+
+struct platform_support {
+ bool hash_mmu;
+ bool radix_mmu;
+ bool radix_gtse;
+ bool xive;
+};
+
+/* Platforms codes are now obsolete in the kernel. Now only used within this
+ * file and ultimately gone too. Feel free to change them if you need, they
+ * are not shared with anything outside of this file anymore
+ */
+#define PLATFORM_PSERIES 0x0100
+#define PLATFORM_PSERIES_LPAR 0x0101
+#define PLATFORM_LPAR 0x0001
+#define PLATFORM_POWERMAC 0x0400
+#define PLATFORM_GENERIC 0x0500
+
+static int __prombss of_platform;
+
+static char __prombss prom_cmd_line[COMMAND_LINE_SIZE];
+
+static unsigned long __prombss prom_memory_limit;
+
+static unsigned long __prombss alloc_top;
+static unsigned long __prombss alloc_top_high;
+static unsigned long __prombss alloc_bottom;
+static unsigned long __prombss rmo_top;
+static unsigned long __prombss ram_top;
+
+static struct mem_map_entry __prombss mem_reserve_map[MEM_RESERVE_MAP_SIZE];
+static int __prombss mem_reserve_cnt;
+
+static cell_t __prombss regbuf[1024];
+
+static bool __prombss rtas_has_query_cpu_stopped;
+
+
+/*
+ * Error results ... some OF calls will return "-1" on error, some
+ * will return 0, some will return either. To simplify, here are
+ * macros to use with any ihandle or phandle return value to check if
+ * it is valid
+ */
+
+#define PROM_ERROR (-1u)
+#define PHANDLE_VALID(p) ((p) != 0 && (p) != PROM_ERROR)
+#define IHANDLE_VALID(i) ((i) != 0 && (i) != PROM_ERROR)
+
+/* Copied from lib/string.c and lib/kstrtox.c */
+
+static int __init prom_strcmp(const char *cs, const char *ct)
+{
+ unsigned char c1, c2;
+
+ while (1) {
+ c1 = *cs++;
+ c2 = *ct++;
+ if (c1 != c2)
+ return c1 < c2 ? -1 : 1;
+ if (!c1)
+ break;
+ }
+ return 0;
+}
+
+static char __init *prom_strcpy(char *dest, const char *src)
+{
+ char *tmp = dest;
+
+ while ((*dest++ = *src++) != '\0')
+ /* nothing */;
+ return tmp;
+}
+
+static int __init prom_strncmp(const char *cs, const char *ct, size_t count)
+{
+ unsigned char c1, c2;
+
+ while (count) {
+ c1 = *cs++;
+ c2 = *ct++;
+ if (c1 != c2)
+ return c1 < c2 ? -1 : 1;
+ if (!c1)
+ break;
+ count--;
+ }
+ return 0;
+}
+
+static size_t __init prom_strlen(const char *s)
+{
+ const char *sc;
+
+ for (sc = s; *sc != '\0'; ++sc)
+ /* nothing */;
+ return sc - s;
+}
+
+static int __init prom_memcmp(const void *cs, const void *ct, size_t count)
+{
+ const unsigned char *su1, *su2;
+ int res = 0;
+
+ for (su1 = cs, su2 = ct; 0 < count; ++su1, ++su2, count--)
+ if ((res = *su1 - *su2) != 0)
+ break;
+ return res;
+}
+
+static char __init *prom_strstr(const char *s1, const char *s2)
+{
+ size_t l1, l2;
+
+ l2 = prom_strlen(s2);
+ if (!l2)
+ return (char *)s1;
+ l1 = prom_strlen(s1);
+ while (l1 >= l2) {
+ l1--;
+ if (!prom_memcmp(s1, s2, l2))
+ return (char *)s1;
+ s1++;
+ }
+ return NULL;
+}
+
+static size_t __init prom_strlcat(char *dest, const char *src, size_t count)
+{
+ size_t dsize = prom_strlen(dest);
+ size_t len = prom_strlen(src);
+ size_t res = dsize + len;
+
+ /* This would be a bug */
+ if (dsize >= count)
+ return count;
+
+ dest += dsize;
+ count -= dsize;
+ if (len >= count)
+ len = count-1;
+ memcpy(dest, src, len);
+ dest[len] = 0;
+ return res;
+
+}
+
+#ifdef CONFIG_PPC_PSERIES
+static int __init prom_strtobool(const char *s, bool *res)
+{
+ if (!s)
+ return -EINVAL;
+
+ switch (s[0]) {
+ case 'y':
+ case 'Y':
+ case '1':
+ *res = true;
+ return 0;
+ case 'n':
+ case 'N':
+ case '0':
+ *res = false;
+ return 0;
+ case 'o':
+ case 'O':
+ switch (s[1]) {
+ case 'n':
+ case 'N':
+ *res = true;
+ return 0;
+ case 'f':
+ case 'F':
+ *res = false;
+ return 0;
+ default:
+ break;
+ }
+ default:
+ break;
+ }
+
+ return -EINVAL;
+}
+#endif
+
+/* This is the one and *ONLY* place where we actually call open
+ * firmware.
+ */
+
+static int __init call_prom(const char *service, int nargs, int nret, ...)
+{
+ int i;
+ struct prom_args args;
+ va_list list;
+
+ args.service = cpu_to_be32(ADDR(service));
+ args.nargs = cpu_to_be32(nargs);
+ args.nret = cpu_to_be32(nret);
+
+ va_start(list, nret);
+ for (i = 0; i < nargs; i++)
+ args.args[i] = cpu_to_be32(va_arg(list, prom_arg_t));
+ va_end(list);
+
+ for (i = 0; i < nret; i++)
+ args.args[nargs+i] = 0;
+
+ if (enter_prom(&args, prom_entry) < 0)
+ return PROM_ERROR;
+
+ return (nret > 0) ? be32_to_cpu(args.args[nargs]) : 0;
+}
+
+static int __init call_prom_ret(const char *service, int nargs, int nret,
+ prom_arg_t *rets, ...)
+{
+ int i;
+ struct prom_args args;
+ va_list list;
+
+ args.service = cpu_to_be32(ADDR(service));
+ args.nargs = cpu_to_be32(nargs);
+ args.nret = cpu_to_be32(nret);
+
+ va_start(list, rets);
+ for (i = 0; i < nargs; i++)
+ args.args[i] = cpu_to_be32(va_arg(list, prom_arg_t));
+ va_end(list);
+
+ for (i = 0; i < nret; i++)
+ args.args[nargs+i] = 0;
+
+ if (enter_prom(&args, prom_entry) < 0)
+ return PROM_ERROR;
+
+ if (rets != NULL)
+ for (i = 1; i < nret; ++i)
+ rets[i-1] = be32_to_cpu(args.args[nargs+i]);
+
+ return (nret > 0) ? be32_to_cpu(args.args[nargs]) : 0;
+}
+
+
+static void __init prom_print(const char *msg)
+{
+ const char *p, *q;
+
+ if (prom.stdout == 0)
+ return;
+
+ for (p = msg; *p != 0; p = q) {
+ for (q = p; *q != 0 && *q != '\n'; ++q)
+ ;
+ if (q > p)
+ call_prom("write", 3, 1, prom.stdout, p, q - p);
+ if (*q == 0)
+ break;
+ ++q;
+ call_prom("write", 3, 1, prom.stdout, ADDR("\r\n"), 2);
+ }
+}
+
+
+/*
+ * Both prom_print_hex & prom_print_dec takes an unsigned long as input so that
+ * we do not need __udivdi3 or __umoddi3 on 32bits.
+ */
+static void __init prom_print_hex(unsigned long val)
+{
+ int i, nibbles = sizeof(val)*2;
+ char buf[sizeof(val)*2+1];
+
+ for (i = nibbles-1; i >= 0; i--) {
+ buf[i] = (val & 0xf) + '0';
+ if (buf[i] > '9')
+ buf[i] += ('a'-'0'-10);
+ val >>= 4;
+ }
+ buf[nibbles] = '\0';
+ call_prom("write", 3, 1, prom.stdout, buf, nibbles);
+}
+
+/* max number of decimal digits in an unsigned long */
+#define UL_DIGITS 21
+static void __init prom_print_dec(unsigned long val)
+{
+ int i, size;
+ char buf[UL_DIGITS+1];
+
+ for (i = UL_DIGITS-1; i >= 0; i--) {
+ buf[i] = (val % 10) + '0';
+ val = val/10;
+ if (val == 0)
+ break;
+ }
+ /* shift stuff down */
+ size = UL_DIGITS - i;
+ call_prom("write", 3, 1, prom.stdout, buf+i, size);
+}
+
+__printf(1, 2)
+static void __init prom_printf(const char *format, ...)
+{
+ const char *p, *q, *s;
+ va_list args;
+ unsigned long v;
+ long vs;
+ int n = 0;
+
+ va_start(args, format);
+ for (p = format; *p != 0; p = q) {
+ for (q = p; *q != 0 && *q != '\n' && *q != '%'; ++q)
+ ;
+ if (q > p)
+ call_prom("write", 3, 1, prom.stdout, p, q - p);
+ if (*q == 0)
+ break;
+ if (*q == '\n') {
+ ++q;
+ call_prom("write", 3, 1, prom.stdout,
+ ADDR("\r\n"), 2);
+ continue;
+ }
+ ++q;
+ if (*q == 0)
+ break;
+ while (*q == 'l') {
+ ++q;
+ ++n;
+ }
+ switch (*q) {
+ case 's':
+ ++q;
+ s = va_arg(args, const char *);
+ prom_print(s);
+ break;
+ case 'x':
+ ++q;
+ switch (n) {
+ case 0:
+ v = va_arg(args, unsigned int);
+ break;
+ case 1:
+ v = va_arg(args, unsigned long);
+ break;
+ case 2:
+ default:
+ v = va_arg(args, unsigned long long);
+ break;
+ }
+ prom_print_hex(v);
+ break;
+ case 'u':
+ ++q;
+ switch (n) {
+ case 0:
+ v = va_arg(args, unsigned int);
+ break;
+ case 1:
+ v = va_arg(args, unsigned long);
+ break;
+ case 2:
+ default:
+ v = va_arg(args, unsigned long long);
+ break;
+ }
+ prom_print_dec(v);
+ break;
+ case 'd':
+ ++q;
+ switch (n) {
+ case 0:
+ vs = va_arg(args, int);
+ break;
+ case 1:
+ vs = va_arg(args, long);
+ break;
+ case 2:
+ default:
+ vs = va_arg(args, long long);
+ break;
+ }
+ if (vs < 0) {
+ prom_print("-");
+ vs = -vs;
+ }
+ prom_print_dec(vs);
+ break;
+ }
+ }
+ va_end(args);
+}
+
+
+static unsigned int __init prom_claim(unsigned long virt, unsigned long size,
+ unsigned long align)
+{
+
+ if (align == 0 && (OF_WORKAROUNDS & OF_WA_CLAIM)) {
+ /*
+ * Old OF requires we claim physical and virtual separately
+ * and then map explicitly (assuming virtual mode)
+ */
+ int ret;
+ prom_arg_t result;
+
+ ret = call_prom_ret("call-method", 5, 2, &result,
+ ADDR("claim"), prom.memory,
+ align, size, virt);
+ if (ret != 0 || result == -1)
+ return -1;
+ ret = call_prom_ret("call-method", 5, 2, &result,
+ ADDR("claim"), prom.mmumap,
+ align, size, virt);
+ if (ret != 0) {
+ call_prom("call-method", 4, 1, ADDR("release"),
+ prom.memory, size, virt);
+ return -1;
+ }
+ /* the 0x12 is M (coherence) + PP == read/write */
+ call_prom("call-method", 6, 1,
+ ADDR("map"), prom.mmumap, 0x12, size, virt, virt);
+ return virt;
+ }
+ return call_prom("claim", 3, 1, (prom_arg_t)virt, (prom_arg_t)size,
+ (prom_arg_t)align);
+}
+
+static void __init __attribute__((noreturn)) prom_panic(const char *reason)
+{
+ prom_print(reason);
+ /* Do not call exit because it clears the screen on pmac
+ * it also causes some sort of double-fault on early pmacs */
+ if (of_platform == PLATFORM_POWERMAC)
+ asm("trap\n");
+
+ /* ToDo: should put up an SRC here on pSeries */
+ call_prom("exit", 0, 0);
+
+ for (;;) /* should never get here */
+ ;
+}
+
+
+static int __init prom_next_node(phandle *nodep)
+{
+ phandle node;
+
+ if ((node = *nodep) != 0
+ && (*nodep = call_prom("child", 1, 1, node)) != 0)
+ return 1;
+ if ((*nodep = call_prom("peer", 1, 1, node)) != 0)
+ return 1;
+ for (;;) {
+ if ((node = call_prom("parent", 1, 1, node)) == 0)
+ return 0;
+ if ((*nodep = call_prom("peer", 1, 1, node)) != 0)
+ return 1;
+ }
+}
+
+static inline int __init prom_getprop(phandle node, const char *pname,
+ void *value, size_t valuelen)
+{
+ return call_prom("getprop", 4, 1, node, ADDR(pname),
+ (u32)(unsigned long) value, (u32) valuelen);
+}
+
+static inline int __init prom_getproplen(phandle node, const char *pname)
+{
+ return call_prom("getproplen", 2, 1, node, ADDR(pname));
+}
+
+static void add_string(char **str, const char *q)
+{
+ char *p = *str;
+
+ while (*q)
+ *p++ = *q++;
+ *p++ = ' ';
+ *str = p;
+}
+
+static char *tohex(unsigned int x)
+{
+ static const char digits[] __initconst = "0123456789abcdef";
+ static char result[9] __prombss;
+ int i;
+
+ result[8] = 0;
+ i = 8;
+ do {
+ --i;
+ result[i] = digits[x & 0xf];
+ x >>= 4;
+ } while (x != 0 && i > 0);
+ return &result[i];
+}
+
+static int __init prom_setprop(phandle node, const char *nodename,
+ const char *pname, void *value, size_t valuelen)
+{
+ char cmd[256], *p;
+
+ if (!(OF_WORKAROUNDS & OF_WA_LONGTRAIL))
+ return call_prom("setprop", 4, 1, node, ADDR(pname),
+ (u32)(unsigned long) value, (u32) valuelen);
+
+ /* gah... setprop doesn't work on longtrail, have to use interpret */
+ p = cmd;
+ add_string(&p, "dev");
+ add_string(&p, nodename);
+ add_string(&p, tohex((u32)(unsigned long) value));
+ add_string(&p, tohex(valuelen));
+ add_string(&p, tohex(ADDR(pname)));
+ add_string(&p, tohex(prom_strlen(pname)));
+ add_string(&p, "property");
+ *p = 0;
+ return call_prom("interpret", 1, 1, (u32)(unsigned long) cmd);
+}
+
+/* We can't use the standard versions because of relocation headaches. */
+#define isxdigit(c) (('0' <= (c) && (c) <= '9') \
+ || ('a' <= (c) && (c) <= 'f') \
+ || ('A' <= (c) && (c) <= 'F'))
+
+#define isdigit(c) ('0' <= (c) && (c) <= '9')
+#define islower(c) ('a' <= (c) && (c) <= 'z')
+#define toupper(c) (islower(c) ? ((c) - 'a' + 'A') : (c))
+
+static unsigned long prom_strtoul(const char *cp, const char **endp)
+{
+ unsigned long result = 0, base = 10, value;
+
+ if (*cp == '0') {
+ base = 8;
+ cp++;
+ if (toupper(*cp) == 'X') {
+ cp++;
+ base = 16;
+ }
+ }
+
+ while (isxdigit(*cp) &&
+ (value = isdigit(*cp) ? *cp - '0' : toupper(*cp) - 'A' + 10) < base) {
+ result = result * base + value;
+ cp++;
+ }
+
+ if (endp)
+ *endp = cp;
+
+ return result;
+}
+
+static unsigned long prom_memparse(const char *ptr, const char **retptr)
+{
+ unsigned long ret = prom_strtoul(ptr, retptr);
+ int shift = 0;
+
+ /*
+ * We can't use a switch here because GCC *may* generate a
+ * jump table which won't work, because we're not running at
+ * the address we're linked at.
+ */
+ if ('G' == **retptr || 'g' == **retptr)
+ shift = 30;
+
+ if ('M' == **retptr || 'm' == **retptr)
+ shift = 20;
+
+ if ('K' == **retptr || 'k' == **retptr)
+ shift = 10;
+
+ if (shift) {
+ ret <<= shift;
+ (*retptr)++;
+ }
+
+ return ret;
+}
+
+/*
+ * Early parsing of the command line passed to the kernel, used for
+ * "mem=x" and the options that affect the iommu
+ */
+static void __init early_cmdline_parse(void)
+{
+ const char *opt;
+
+ char *p;
+ int l = 0;
+
+ prom_cmd_line[0] = 0;
+ p = prom_cmd_line;
+
+ if (!IS_ENABLED(CONFIG_CMDLINE_FORCE) && (long)prom.chosen > 0)
+ l = prom_getprop(prom.chosen, "bootargs", p, COMMAND_LINE_SIZE-1);
+
+ if (IS_ENABLED(CONFIG_CMDLINE_EXTEND) || l <= 0 || p[0] == '\0')
+ prom_strlcat(prom_cmd_line, " " CONFIG_CMDLINE,
+ sizeof(prom_cmd_line));
+
+ prom_printf("command line: %s\n", prom_cmd_line);
+
+#ifdef CONFIG_PPC64
+ opt = prom_strstr(prom_cmd_line, "iommu=");
+ if (opt) {
+ prom_printf("iommu opt is: %s\n", opt);
+ opt += 6;
+ while (*opt && *opt == ' ')
+ opt++;
+ if (!prom_strncmp(opt, "off", 3))
+ prom_iommu_off = 1;
+ else if (!prom_strncmp(opt, "force", 5))
+ prom_iommu_force_on = 1;
+ }
+#endif
+ opt = prom_strstr(prom_cmd_line, "mem=");
+ if (opt) {
+ opt += 4;
+ prom_memory_limit = prom_memparse(opt, (const char **)&opt);
+#ifdef CONFIG_PPC64
+ /* Align to 16 MB == size of ppc64 large page */
+ prom_memory_limit = ALIGN(prom_memory_limit, 0x1000000);
+#endif
+ }
+
+#ifdef CONFIG_PPC_PSERIES
+ prom_radix_disable = !IS_ENABLED(CONFIG_PPC_RADIX_MMU_DEFAULT);
+ opt = prom_strstr(prom_cmd_line, "disable_radix");
+ if (opt) {
+ opt += 13;
+ if (*opt && *opt == '=') {
+ bool val;
+
+ if (prom_strtobool(++opt, &val))
+ prom_radix_disable = false;
+ else
+ prom_radix_disable = val;
+ } else
+ prom_radix_disable = true;
+ }
+ if (prom_radix_disable)
+ prom_debug("Radix disabled from cmdline\n");
+
+ opt = prom_strstr(prom_cmd_line, "radix_hcall_invalidate=on");
+ if (opt) {
+ prom_radix_gtse_disable = true;
+ prom_debug("Radix GTSE disabled from cmdline\n");
+ }
+
+ opt = prom_strstr(prom_cmd_line, "xive=off");
+ if (opt) {
+ prom_xive_disable = true;
+ prom_debug("XIVE disabled from cmdline\n");
+ }
+#endif /* CONFIG_PPC_PSERIES */
+
+#ifdef CONFIG_PPC_SVM
+ opt = prom_strstr(prom_cmd_line, "svm=");
+ if (opt) {
+ bool val;
+
+ opt += sizeof("svm=") - 1;
+ if (!prom_strtobool(opt, &val))
+ prom_svm_enable = val;
+ }
+#endif /* CONFIG_PPC_SVM */
+}
+
+#ifdef CONFIG_PPC_PSERIES
+/*
+ * The architecture vector has an array of PVR mask/value pairs,
+ * followed by # option vectors - 1, followed by the option vectors.
+ *
+ * See prom.h for the definition of the bits specified in the
+ * architecture vector.
+ */
+
+/* Firmware expects the value to be n - 1, where n is the # of vectors */
+#define NUM_VECTORS(n) ((n) - 1)
+
+/*
+ * Firmware expects 1 + n - 2, where n is the length of the option vector in
+ * bytes. The 1 accounts for the length byte itself, the - 2 .. ?
+ */
+#define VECTOR_LENGTH(n) (1 + (n) - 2)
+
+struct option_vector1 {
+ u8 byte1;
+ u8 arch_versions;
+ u8 arch_versions3;
+} __packed;
+
+struct option_vector2 {
+ u8 byte1;
+ __be16 reserved;
+ __be32 real_base;
+ __be32 real_size;
+ __be32 virt_base;
+ __be32 virt_size;
+ __be32 load_base;
+ __be32 min_rma;
+ __be32 min_load;
+ u8 min_rma_percent;
+ u8 max_pft_size;
+} __packed;
+
+struct option_vector3 {
+ u8 byte1;
+ u8 byte2;
+} __packed;
+
+struct option_vector4 {
+ u8 byte1;
+ u8 min_vp_cap;
+} __packed;
+
+struct option_vector5 {
+ u8 byte1;
+ u8 byte2;
+ u8 byte3;
+ u8 cmo;
+ u8 associativity;
+ u8 bin_opts;
+ u8 micro_checkpoint;
+ u8 reserved0;
+ __be32 max_cpus;
+ __be16 papr_level;
+ __be16 reserved1;
+ u8 platform_facilities;
+ u8 reserved2;
+ __be16 reserved3;
+ u8 subprocessors;
+ u8 byte22;
+ u8 intarch;
+ u8 mmu;
+ u8 hash_ext;
+ u8 radix_ext;
+} __packed;
+
+struct option_vector6 {
+ u8 reserved;
+ u8 secondary_pteg;
+ u8 os_name;
+} __packed;
+
+struct ibm_arch_vec {
+ struct { u32 mask, val; } pvrs[14];
+
+ u8 num_vectors;
+
+ u8 vec1_len;
+ struct option_vector1 vec1;
+
+ u8 vec2_len;
+ struct option_vector2 vec2;
+
+ u8 vec3_len;
+ struct option_vector3 vec3;
+
+ u8 vec4_len;
+ struct option_vector4 vec4;
+
+ u8 vec5_len;
+ struct option_vector5 vec5;
+
+ u8 vec6_len;
+ struct option_vector6 vec6;
+} __packed;
+
+static const struct ibm_arch_vec ibm_architecture_vec_template __initconst = {
+ .pvrs = {
+ {
+ .mask = cpu_to_be32(0xfffe0000), /* POWER5/POWER5+ */
+ .val = cpu_to_be32(0x003a0000),
+ },
+ {
+ .mask = cpu_to_be32(0xffff0000), /* POWER6 */
+ .val = cpu_to_be32(0x003e0000),
+ },
+ {
+ .mask = cpu_to_be32(0xffff0000), /* POWER7 */
+ .val = cpu_to_be32(0x003f0000),
+ },
+ {
+ .mask = cpu_to_be32(0xffff0000), /* POWER8E */
+ .val = cpu_to_be32(0x004b0000),
+ },
+ {
+ .mask = cpu_to_be32(0xffff0000), /* POWER8NVL */
+ .val = cpu_to_be32(0x004c0000),
+ },
+ {
+ .mask = cpu_to_be32(0xffff0000), /* POWER8 */
+ .val = cpu_to_be32(0x004d0000),
+ },
+ {
+ .mask = cpu_to_be32(0xffff0000), /* POWER9 */
+ .val = cpu_to_be32(0x004e0000),
+ },
+ {
+ .mask = cpu_to_be32(0xffff0000), /* POWER10 */
+ .val = cpu_to_be32(0x00800000),
+ },
+ {
+ .mask = cpu_to_be32(0xffffffff), /* all 3.1-compliant */
+ .val = cpu_to_be32(0x0f000006),
+ },
+ {
+ .mask = cpu_to_be32(0xffffffff), /* all 3.00-compliant */
+ .val = cpu_to_be32(0x0f000005),
+ },
+ {
+ .mask = cpu_to_be32(0xffffffff), /* all 2.07-compliant */
+ .val = cpu_to_be32(0x0f000004),
+ },
+ {
+ .mask = cpu_to_be32(0xffffffff), /* all 2.06-compliant */
+ .val = cpu_to_be32(0x0f000003),
+ },
+ {
+ .mask = cpu_to_be32(0xffffffff), /* all 2.05-compliant */
+ .val = cpu_to_be32(0x0f000002),
+ },
+ {
+ .mask = cpu_to_be32(0xfffffffe), /* all 2.04-compliant and earlier */
+ .val = cpu_to_be32(0x0f000001),
+ },
+ },
+
+ .num_vectors = NUM_VECTORS(6),
+
+ .vec1_len = VECTOR_LENGTH(sizeof(struct option_vector1)),
+ .vec1 = {
+ .byte1 = 0,
+ .arch_versions = OV1_PPC_2_00 | OV1_PPC_2_01 | OV1_PPC_2_02 | OV1_PPC_2_03 |
+ OV1_PPC_2_04 | OV1_PPC_2_05 | OV1_PPC_2_06 | OV1_PPC_2_07,
+ .arch_versions3 = OV1_PPC_3_00 | OV1_PPC_3_1,
+ },
+
+ .vec2_len = VECTOR_LENGTH(sizeof(struct option_vector2)),
+ /* option vector 2: Open Firmware options supported */
+ .vec2 = {
+ .byte1 = OV2_REAL_MODE,
+ .reserved = 0,
+ .real_base = cpu_to_be32(0xffffffff),
+ .real_size = cpu_to_be32(0xffffffff),
+ .virt_base = cpu_to_be32(0xffffffff),
+ .virt_size = cpu_to_be32(0xffffffff),
+ .load_base = cpu_to_be32(0xffffffff),
+ .min_rma = cpu_to_be32(512), /* 512MB min RMA */
+ .min_load = cpu_to_be32(0xffffffff), /* full client load */
+ .min_rma_percent = 0, /* min RMA percentage of total RAM */
+ .max_pft_size = 48, /* max log_2(hash table size) */
+ },
+
+ .vec3_len = VECTOR_LENGTH(sizeof(struct option_vector3)),
+ /* option vector 3: processor options supported */
+ .vec3 = {
+ .byte1 = 0, /* don't ignore, don't halt */
+ .byte2 = OV3_FP | OV3_VMX | OV3_DFP,
+ },
+
+ .vec4_len = VECTOR_LENGTH(sizeof(struct option_vector4)),
+ /* option vector 4: IBM PAPR implementation */
+ .vec4 = {
+ .byte1 = 0, /* don't halt */
+ .min_vp_cap = OV4_MIN_ENT_CAP, /* minimum VP entitled capacity */
+ },
+
+ .vec5_len = VECTOR_LENGTH(sizeof(struct option_vector5)),
+ /* option vector 5: PAPR/OF options */
+ .vec5 = {
+ .byte1 = 0, /* don't ignore, don't halt */
+ .byte2 = OV5_FEAT(OV5_LPAR) | OV5_FEAT(OV5_SPLPAR) | OV5_FEAT(OV5_LARGE_PAGES) |
+ OV5_FEAT(OV5_DRCONF_MEMORY) | OV5_FEAT(OV5_DONATE_DEDICATE_CPU) |
+#ifdef CONFIG_PCI_MSI
+ /* PCIe/MSI support. Without MSI full PCIe is not supported */
+ OV5_FEAT(OV5_MSI),
+#else
+ 0,
+#endif
+ .byte3 = 0,
+ .cmo =
+#ifdef CONFIG_PPC_SMLPAR
+ OV5_FEAT(OV5_CMO) | OV5_FEAT(OV5_XCMO),
+#else
+ 0,
+#endif
+ .associativity = OV5_FEAT(OV5_FORM1_AFFINITY) | OV5_FEAT(OV5_PRRN) |
+ OV5_FEAT(OV5_FORM2_AFFINITY),
+ .bin_opts = OV5_FEAT(OV5_RESIZE_HPT) | OV5_FEAT(OV5_HP_EVT),
+ .micro_checkpoint = 0,
+ .reserved0 = 0,
+ .max_cpus = cpu_to_be32(NR_CPUS), /* number of cores supported */
+ .papr_level = 0,
+ .reserved1 = 0,
+ .platform_facilities = OV5_FEAT(OV5_PFO_HW_RNG) | OV5_FEAT(OV5_PFO_HW_ENCR) | OV5_FEAT(OV5_PFO_HW_842),
+ .reserved2 = 0,
+ .reserved3 = 0,
+ .subprocessors = 1,
+ .byte22 = OV5_FEAT(OV5_DRMEM_V2) | OV5_FEAT(OV5_DRC_INFO),
+ .intarch = 0,
+ .mmu = 0,
+ .hash_ext = 0,
+ .radix_ext = 0,
+ },
+
+ /* option vector 6: IBM PAPR hints */
+ .vec6_len = VECTOR_LENGTH(sizeof(struct option_vector6)),
+ .vec6 = {
+ .reserved = 0,
+ .secondary_pteg = 0,
+ .os_name = OV6_LINUX,
+ },
+};
+
+static struct ibm_arch_vec __prombss ibm_architecture_vec ____cacheline_aligned;
+
+/* Old method - ELF header with PT_NOTE sections only works on BE */
+#ifdef __BIG_ENDIAN__
+static const struct fake_elf {
+ Elf32_Ehdr elfhdr;
+ Elf32_Phdr phdr[2];
+ struct chrpnote {
+ u32 namesz;
+ u32 descsz;
+ u32 type;
+ char name[8]; /* "PowerPC" */
+ struct chrpdesc {
+ u32 real_mode;
+ u32 real_base;
+ u32 real_size;
+ u32 virt_base;
+ u32 virt_size;
+ u32 load_base;
+ } chrpdesc;
+ } chrpnote;
+ struct rpanote {
+ u32 namesz;
+ u32 descsz;
+ u32 type;
+ char name[24]; /* "IBM,RPA-Client-Config" */
+ struct rpadesc {
+ u32 lpar_affinity;
+ u32 min_rmo_size;
+ u32 min_rmo_percent;
+ u32 max_pft_size;
+ u32 splpar;
+ u32 min_load;
+ u32 new_mem_def;
+ u32 ignore_me;
+ } rpadesc;
+ } rpanote;
+} fake_elf __initconst = {
+ .elfhdr = {
+ .e_ident = { 0x7f, 'E', 'L', 'F',
+ ELFCLASS32, ELFDATA2MSB, EV_CURRENT },
+ .e_type = ET_EXEC, /* yeah right */
+ .e_machine = EM_PPC,
+ .e_version = EV_CURRENT,
+ .e_phoff = offsetof(struct fake_elf, phdr),
+ .e_phentsize = sizeof(Elf32_Phdr),
+ .e_phnum = 2
+ },
+ .phdr = {
+ [0] = {
+ .p_type = PT_NOTE,
+ .p_offset = offsetof(struct fake_elf, chrpnote),
+ .p_filesz = sizeof(struct chrpnote)
+ }, [1] = {
+ .p_type = PT_NOTE,
+ .p_offset = offsetof(struct fake_elf, rpanote),
+ .p_filesz = sizeof(struct rpanote)
+ }
+ },
+ .chrpnote = {
+ .namesz = sizeof("PowerPC"),
+ .descsz = sizeof(struct chrpdesc),
+ .type = 0x1275,
+ .name = "PowerPC",
+ .chrpdesc = {
+ .real_mode = ~0U, /* ~0 means "don't care" */
+ .real_base = ~0U,
+ .real_size = ~0U,
+ .virt_base = ~0U,
+ .virt_size = ~0U,
+ .load_base = ~0U
+ },
+ },
+ .rpanote = {
+ .namesz = sizeof("IBM,RPA-Client-Config"),
+ .descsz = sizeof(struct rpadesc),
+ .type = 0x12759999,
+ .name = "IBM,RPA-Client-Config",
+ .rpadesc = {
+ .lpar_affinity = 0,
+ .min_rmo_size = 64, /* in megabytes */
+ .min_rmo_percent = 0,
+ .max_pft_size = 48, /* 2^48 bytes max PFT size */
+ .splpar = 1,
+ .min_load = ~0U,
+ .new_mem_def = 0
+ }
+ }
+};
+#endif /* __BIG_ENDIAN__ */
+
+static int __init prom_count_smt_threads(void)
+{
+ phandle node;
+ char type[64];
+ unsigned int plen;
+
+ /* Pick up th first CPU node we can find */
+ for (node = 0; prom_next_node(&node); ) {
+ type[0] = 0;
+ prom_getprop(node, "device_type", type, sizeof(type));
+
+ if (prom_strcmp(type, "cpu"))
+ continue;
+ /*
+ * There is an entry for each smt thread, each entry being
+ * 4 bytes long. All cpus should have the same number of
+ * smt threads, so return after finding the first.
+ */
+ plen = prom_getproplen(node, "ibm,ppc-interrupt-server#s");
+ if (plen == PROM_ERROR)
+ break;
+ plen >>= 2;
+ prom_debug("Found %lu smt threads per core\n", (unsigned long)plen);
+
+ /* Sanity check */
+ if (plen < 1 || plen > 64) {
+ prom_printf("Threads per core %lu out of bounds, assuming 1\n",
+ (unsigned long)plen);
+ return 1;
+ }
+ return plen;
+ }
+ prom_debug("No threads found, assuming 1 per core\n");
+
+ return 1;
+
+}
+
+static void __init prom_parse_mmu_model(u8 val,
+ struct platform_support *support)
+{
+ switch (val) {
+ case OV5_FEAT(OV5_MMU_DYNAMIC):
+ case OV5_FEAT(OV5_MMU_EITHER): /* Either Available */
+ prom_debug("MMU - either supported\n");
+ support->radix_mmu = !prom_radix_disable;
+ support->hash_mmu = true;
+ break;
+ case OV5_FEAT(OV5_MMU_RADIX): /* Only Radix */
+ prom_debug("MMU - radix only\n");
+ if (prom_radix_disable) {
+ /*
+ * If we __have__ to do radix, we're better off ignoring
+ * the command line rather than not booting.
+ */
+ prom_printf("WARNING: Ignoring cmdline option disable_radix\n");
+ }
+ support->radix_mmu = true;
+ break;
+ case OV5_FEAT(OV5_MMU_HASH):
+ prom_debug("MMU - hash only\n");
+ support->hash_mmu = true;
+ break;
+ default:
+ prom_debug("Unknown mmu support option: 0x%x\n", val);
+ break;
+ }
+}
+
+static void __init prom_parse_xive_model(u8 val,
+ struct platform_support *support)
+{
+ switch (val) {
+ case OV5_FEAT(OV5_XIVE_EITHER): /* Either Available */
+ prom_debug("XIVE - either mode supported\n");
+ support->xive = !prom_xive_disable;
+ break;
+ case OV5_FEAT(OV5_XIVE_EXPLOIT): /* Only Exploitation mode */
+ prom_debug("XIVE - exploitation mode supported\n");
+ if (prom_xive_disable) {
+ /*
+ * If we __have__ to do XIVE, we're better off ignoring
+ * the command line rather than not booting.
+ */
+ prom_printf("WARNING: Ignoring cmdline option xive=off\n");
+ }
+ support->xive = true;
+ break;
+ case OV5_FEAT(OV5_XIVE_LEGACY): /* Only Legacy mode */
+ prom_debug("XIVE - legacy mode supported\n");
+ break;
+ default:
+ prom_debug("Unknown xive support option: 0x%x\n", val);
+ break;
+ }
+}
+
+static void __init prom_parse_platform_support(u8 index, u8 val,
+ struct platform_support *support)
+{
+ switch (index) {
+ case OV5_INDX(OV5_MMU_SUPPORT): /* MMU Model */
+ prom_parse_mmu_model(val & OV5_FEAT(OV5_MMU_SUPPORT), support);
+ break;
+ case OV5_INDX(OV5_RADIX_GTSE): /* Radix Extensions */
+ if (val & OV5_FEAT(OV5_RADIX_GTSE))
+ support->radix_gtse = !prom_radix_gtse_disable;
+ break;
+ case OV5_INDX(OV5_XIVE_SUPPORT): /* Interrupt mode */
+ prom_parse_xive_model(val & OV5_FEAT(OV5_XIVE_SUPPORT),
+ support);
+ break;
+ }
+}
+
+static void __init prom_check_platform_support(void)
+{
+ struct platform_support supported = {
+ .hash_mmu = false,
+ .radix_mmu = false,
+ .radix_gtse = false,
+ .xive = false
+ };
+ int prop_len = prom_getproplen(prom.chosen,
+ "ibm,arch-vec-5-platform-support");
+
+ /*
+ * First copy the architecture vec template
+ *
+ * use memcpy() instead of *vec = *vec_template so that GCC replaces it
+ * by __memcpy() when KASAN is active
+ */
+ memcpy(&ibm_architecture_vec, &ibm_architecture_vec_template,
+ sizeof(ibm_architecture_vec));
+
+ if (prop_len > 1) {
+ int i;
+ u8 vec[8];
+ prom_debug("Found ibm,arch-vec-5-platform-support, len: %d\n",
+ prop_len);
+ if (prop_len > sizeof(vec))
+ prom_printf("WARNING: ibm,arch-vec-5-platform-support longer than expected (len: %d)\n",
+ prop_len);
+ prom_getprop(prom.chosen, "ibm,arch-vec-5-platform-support", &vec, sizeof(vec));
+ for (i = 0; i < prop_len; i += 2) {
+ prom_debug("%d: index = 0x%x val = 0x%x\n", i / 2, vec[i], vec[i + 1]);
+ prom_parse_platform_support(vec[i], vec[i + 1], &supported);
+ }
+ }
+
+ if (supported.radix_mmu && IS_ENABLED(CONFIG_PPC_RADIX_MMU)) {
+ /* Radix preferred - Check if GTSE is also supported */
+ prom_debug("Asking for radix\n");
+ ibm_architecture_vec.vec5.mmu = OV5_FEAT(OV5_MMU_RADIX);
+ if (supported.radix_gtse)
+ ibm_architecture_vec.vec5.radix_ext =
+ OV5_FEAT(OV5_RADIX_GTSE);
+ else
+ prom_debug("Radix GTSE isn't supported\n");
+ } else if (supported.hash_mmu) {
+ /* Default to hash mmu (if we can) */
+ prom_debug("Asking for hash\n");
+ ibm_architecture_vec.vec5.mmu = OV5_FEAT(OV5_MMU_HASH);
+ } else {
+ /* We're probably on a legacy hypervisor */
+ prom_debug("Assuming legacy hash support\n");
+ }
+
+ if (supported.xive) {
+ prom_debug("Asking for XIVE\n");
+ ibm_architecture_vec.vec5.intarch = OV5_FEAT(OV5_XIVE_EXPLOIT);
+ }
+}
+
+static void __init prom_send_capabilities(void)
+{
+ ihandle root;
+ prom_arg_t ret;
+ u32 cores;
+
+ /* Check ibm,arch-vec-5-platform-support and fixup vec5 if required */
+ prom_check_platform_support();
+
+ root = call_prom("open", 1, 1, ADDR("/"));
+ if (root != 0) {
+ /* We need to tell the FW about the number of cores we support.
+ *
+ * To do that, we count the number of threads on the first core
+ * (we assume this is the same for all cores) and use it to
+ * divide NR_CPUS.
+ */
+
+ cores = DIV_ROUND_UP(NR_CPUS, prom_count_smt_threads());
+ prom_printf("Max number of cores passed to firmware: %u (NR_CPUS = %d)\n",
+ cores, NR_CPUS);
+
+ ibm_architecture_vec.vec5.max_cpus = cpu_to_be32(cores);
+
+ /* try calling the ibm,client-architecture-support method */
+ prom_printf("Calling ibm,client-architecture-support...");
+ if (call_prom_ret("call-method", 3, 2, &ret,
+ ADDR("ibm,client-architecture-support"),
+ root,
+ ADDR(&ibm_architecture_vec)) == 0) {
+ /* the call exists... */
+ if (ret)
+ prom_printf("\nWARNING: ibm,client-architecture"
+ "-support call FAILED!\n");
+ call_prom("close", 1, 0, root);
+ prom_printf(" done\n");
+ return;
+ }
+ call_prom("close", 1, 0, root);
+ prom_printf(" not implemented\n");
+ }
+
+#ifdef __BIG_ENDIAN__
+ {
+ ihandle elfloader;
+
+ /* no ibm,client-architecture-support call, try the old way */
+ elfloader = call_prom("open", 1, 1,
+ ADDR("/packages/elf-loader"));
+ if (elfloader == 0) {
+ prom_printf("couldn't open /packages/elf-loader\n");
+ return;
+ }
+ call_prom("call-method", 3, 1, ADDR("process-elf-header"),
+ elfloader, ADDR(&fake_elf));
+ call_prom("close", 1, 0, elfloader);
+ }
+#endif /* __BIG_ENDIAN__ */
+}
+#endif /* CONFIG_PPC_PSERIES */
+
+/*
+ * Memory allocation strategy... our layout is normally:
+ *
+ * at 14Mb or more we have vmlinux, then a gap and initrd. In some
+ * rare cases, initrd might end up being before the kernel though.
+ * We assume this won't override the final kernel at 0, we have no
+ * provision to handle that in this version, but it should hopefully
+ * never happen.
+ *
+ * alloc_top is set to the top of RMO, eventually shrink down if the
+ * TCEs overlap
+ *
+ * alloc_bottom is set to the top of kernel/initrd
+ *
+ * from there, allocations are done this way : rtas is allocated
+ * topmost, and the device-tree is allocated from the bottom. We try
+ * to grow the device-tree allocation as we progress. If we can't,
+ * then we fail, we don't currently have a facility to restart
+ * elsewhere, but that shouldn't be necessary.
+ *
+ * Note that calls to reserve_mem have to be done explicitly, memory
+ * allocated with either alloc_up or alloc_down isn't automatically
+ * reserved.
+ */
+
+
+/*
+ * Allocates memory in the RMO upward from the kernel/initrd
+ *
+ * When align is 0, this is a special case, it means to allocate in place
+ * at the current location of alloc_bottom or fail (that is basically
+ * extending the previous allocation). Used for the device-tree flattening
+ */
+static unsigned long __init alloc_up(unsigned long size, unsigned long align)
+{
+ unsigned long base = alloc_bottom;
+ unsigned long addr = 0;
+
+ if (align)
+ base = ALIGN(base, align);
+ prom_debug("%s(%lx, %lx)\n", __func__, size, align);
+ if (ram_top == 0)
+ prom_panic("alloc_up() called with mem not initialized\n");
+
+ if (align)
+ base = ALIGN(alloc_bottom, align);
+ else
+ base = alloc_bottom;
+
+ for(; (base + size) <= alloc_top;
+ base = ALIGN(base + 0x100000, align)) {
+ prom_debug(" trying: 0x%lx\n\r", base);
+ addr = (unsigned long)prom_claim(base, size, 0);
+ if (addr != PROM_ERROR && addr != 0)
+ break;
+ addr = 0;
+ if (align == 0)
+ break;
+ }
+ if (addr == 0)
+ return 0;
+ alloc_bottom = addr + size;
+
+ prom_debug(" -> %lx\n", addr);
+ prom_debug(" alloc_bottom : %lx\n", alloc_bottom);
+ prom_debug(" alloc_top : %lx\n", alloc_top);
+ prom_debug(" alloc_top_hi : %lx\n", alloc_top_high);
+ prom_debug(" rmo_top : %lx\n", rmo_top);
+ prom_debug(" ram_top : %lx\n", ram_top);
+
+ return addr;
+}
+
+/*
+ * Allocates memory downward, either from top of RMO, or if highmem
+ * is set, from the top of RAM. Note that this one doesn't handle
+ * failures. It does claim memory if highmem is not set.
+ */
+static unsigned long __init alloc_down(unsigned long size, unsigned long align,
+ int highmem)
+{
+ unsigned long base, addr = 0;
+
+ prom_debug("%s(%lx, %lx, %s)\n", __func__, size, align,
+ highmem ? "(high)" : "(low)");
+ if (ram_top == 0)
+ prom_panic("alloc_down() called with mem not initialized\n");
+
+ if (highmem) {
+ /* Carve out storage for the TCE table. */
+ addr = ALIGN_DOWN(alloc_top_high - size, align);
+ if (addr <= alloc_bottom)
+ return 0;
+ /* Will we bump into the RMO ? If yes, check out that we
+ * didn't overlap existing allocations there, if we did,
+ * we are dead, we must be the first in town !
+ */
+ if (addr < rmo_top) {
+ /* Good, we are first */
+ if (alloc_top == rmo_top)
+ alloc_top = rmo_top = addr;
+ else
+ return 0;
+ }
+ alloc_top_high = addr;
+ goto bail;
+ }
+
+ base = ALIGN_DOWN(alloc_top - size, align);
+ for (; base > alloc_bottom;
+ base = ALIGN_DOWN(base - 0x100000, align)) {
+ prom_debug(" trying: 0x%lx\n\r", base);
+ addr = (unsigned long)prom_claim(base, size, 0);
+ if (addr != PROM_ERROR && addr != 0)
+ break;
+ addr = 0;
+ }
+ if (addr == 0)
+ return 0;
+ alloc_top = addr;
+
+ bail:
+ prom_debug(" -> %lx\n", addr);
+ prom_debug(" alloc_bottom : %lx\n", alloc_bottom);
+ prom_debug(" alloc_top : %lx\n", alloc_top);
+ prom_debug(" alloc_top_hi : %lx\n", alloc_top_high);
+ prom_debug(" rmo_top : %lx\n", rmo_top);
+ prom_debug(" ram_top : %lx\n", ram_top);
+
+ return addr;
+}
+
+/*
+ * Parse a "reg" cell
+ */
+static unsigned long __init prom_next_cell(int s, cell_t **cellp)
+{
+ cell_t *p = *cellp;
+ unsigned long r = 0;
+
+ /* Ignore more than 2 cells */
+ while (s > sizeof(unsigned long) / 4) {
+ p++;
+ s--;
+ }
+ r = be32_to_cpu(*p++);
+#ifdef CONFIG_PPC64
+ if (s > 1) {
+ r <<= 32;
+ r |= be32_to_cpu(*(p++));
+ }
+#endif
+ *cellp = p;
+ return r;
+}
+
+/*
+ * Very dumb function for adding to the memory reserve list, but
+ * we don't need anything smarter at this point
+ *
+ * XXX Eventually check for collisions. They should NEVER happen.
+ * If problems seem to show up, it would be a good start to track
+ * them down.
+ */
+static void __init reserve_mem(u64 base, u64 size)
+{
+ u64 top = base + size;
+ unsigned long cnt = mem_reserve_cnt;
+
+ if (size == 0)
+ return;
+
+ /* We need to always keep one empty entry so that we
+ * have our terminator with "size" set to 0 since we are
+ * dumb and just copy this entire array to the boot params
+ */
+ base = ALIGN_DOWN(base, PAGE_SIZE);
+ top = ALIGN(top, PAGE_SIZE);
+ size = top - base;
+
+ if (cnt >= (MEM_RESERVE_MAP_SIZE - 1))
+ prom_panic("Memory reserve map exhausted !\n");
+ mem_reserve_map[cnt].base = cpu_to_be64(base);
+ mem_reserve_map[cnt].size = cpu_to_be64(size);
+ mem_reserve_cnt = cnt + 1;
+}
+
+/*
+ * Initialize memory allocation mechanism, parse "memory" nodes and
+ * obtain that way the top of memory and RMO to setup out local allocator
+ */
+static void __init prom_init_mem(void)
+{
+ phandle node;
+ char type[64];
+ unsigned int plen;
+ cell_t *p, *endp;
+ __be32 val;
+ u32 rac, rsc;
+
+ /*
+ * We iterate the memory nodes to find
+ * 1) top of RMO (first node)
+ * 2) top of memory
+ */
+ val = cpu_to_be32(2);
+ prom_getprop(prom.root, "#address-cells", &val, sizeof(val));
+ rac = be32_to_cpu(val);
+ val = cpu_to_be32(1);
+ prom_getprop(prom.root, "#size-cells", &val, sizeof(rsc));
+ rsc = be32_to_cpu(val);
+ prom_debug("root_addr_cells: %x\n", rac);
+ prom_debug("root_size_cells: %x\n", rsc);
+
+ prom_debug("scanning memory:\n");
+
+ for (node = 0; prom_next_node(&node); ) {
+ type[0] = 0;
+ prom_getprop(node, "device_type", type, sizeof(type));
+
+ if (type[0] == 0) {
+ /*
+ * CHRP Longtrail machines have no device_type
+ * on the memory node, so check the name instead...
+ */
+ prom_getprop(node, "name", type, sizeof(type));
+ }
+ if (prom_strcmp(type, "memory"))
+ continue;
+
+ plen = prom_getprop(node, "reg", regbuf, sizeof(regbuf));
+ if (plen > sizeof(regbuf)) {
+ prom_printf("memory node too large for buffer !\n");
+ plen = sizeof(regbuf);
+ }
+ p = regbuf;
+ endp = p + (plen / sizeof(cell_t));
+
+#ifdef DEBUG_PROM
+ memset(prom_scratch, 0, sizeof(prom_scratch));
+ call_prom("package-to-path", 3, 1, node, prom_scratch,
+ sizeof(prom_scratch) - 1);
+ prom_debug(" node %s :\n", prom_scratch);
+#endif /* DEBUG_PROM */
+
+ while ((endp - p) >= (rac + rsc)) {
+ unsigned long base, size;
+
+ base = prom_next_cell(rac, &p);
+ size = prom_next_cell(rsc, &p);
+
+ if (size == 0)
+ continue;
+ prom_debug(" %lx %lx\n", base, size);
+ if (base == 0 && (of_platform & PLATFORM_LPAR))
+ rmo_top = size;
+ if ((base + size) > ram_top)
+ ram_top = base + size;
+ }
+ }
+
+ alloc_bottom = PAGE_ALIGN((unsigned long)&_end + 0x4000);
+
+ /*
+ * If prom_memory_limit is set we reduce the upper limits *except* for
+ * alloc_top_high. This must be the real top of RAM so we can put
+ * TCE's up there.
+ */
+
+ alloc_top_high = ram_top;
+
+ if (prom_memory_limit) {
+ if (prom_memory_limit <= alloc_bottom) {
+ prom_printf("Ignoring mem=%lx <= alloc_bottom.\n",
+ prom_memory_limit);
+ prom_memory_limit = 0;
+ } else if (prom_memory_limit >= ram_top) {
+ prom_printf("Ignoring mem=%lx >= ram_top.\n",
+ prom_memory_limit);
+ prom_memory_limit = 0;
+ } else {
+ ram_top = prom_memory_limit;
+ rmo_top = min(rmo_top, prom_memory_limit);
+ }
+ }
+
+ /*
+ * Setup our top alloc point, that is top of RMO or top of
+ * segment 0 when running non-LPAR.
+ * Some RS64 machines have buggy firmware where claims up at
+ * 1GB fail. Cap at 768MB as a workaround.
+ * Since 768MB is plenty of room, and we need to cap to something
+ * reasonable on 32-bit, cap at 768MB on all machines.
+ */
+ if (!rmo_top)
+ rmo_top = ram_top;
+ rmo_top = min(0x30000000ul, rmo_top);
+ alloc_top = rmo_top;
+ alloc_top_high = ram_top;
+
+ /*
+ * Check if we have an initrd after the kernel but still inside
+ * the RMO. If we do move our bottom point to after it.
+ */
+ if (prom_initrd_start &&
+ prom_initrd_start < rmo_top &&
+ prom_initrd_end > alloc_bottom)
+ alloc_bottom = PAGE_ALIGN(prom_initrd_end);
+
+ prom_printf("memory layout at init:\n");
+ prom_printf(" memory_limit : %lx (16 MB aligned)\n",
+ prom_memory_limit);
+ prom_printf(" alloc_bottom : %lx\n", alloc_bottom);
+ prom_printf(" alloc_top : %lx\n", alloc_top);
+ prom_printf(" alloc_top_hi : %lx\n", alloc_top_high);
+ prom_printf(" rmo_top : %lx\n", rmo_top);
+ prom_printf(" ram_top : %lx\n", ram_top);
+}
+
+static void __init prom_close_stdin(void)
+{
+ __be32 val;
+ ihandle stdin;
+
+ if (prom_getprop(prom.chosen, "stdin", &val, sizeof(val)) > 0) {
+ stdin = be32_to_cpu(val);
+ call_prom("close", 1, 0, stdin);
+ }
+}
+
+#ifdef CONFIG_PPC_SVM
+static int prom_rtas_hcall(uint64_t args)
+{
+ register uint64_t arg1 asm("r3") = H_RTAS;
+ register uint64_t arg2 asm("r4") = args;
+
+ asm volatile("sc 1\n" : "=r" (arg1) :
+ "r" (arg1),
+ "r" (arg2) :);
+ return arg1;
+}
+
+static struct rtas_args __prombss os_term_args;
+
+static void __init prom_rtas_os_term(char *str)
+{
+ phandle rtas_node;
+ __be32 val;
+ u32 token;
+
+ prom_debug("%s: start...\n", __func__);
+ rtas_node = call_prom("finddevice", 1, 1, ADDR("/rtas"));
+ prom_debug("rtas_node: %x\n", rtas_node);
+ if (!PHANDLE_VALID(rtas_node))
+ return;
+
+ val = 0;
+ prom_getprop(rtas_node, "ibm,os-term", &val, sizeof(val));
+ token = be32_to_cpu(val);
+ prom_debug("ibm,os-term: %x\n", token);
+ if (token == 0)
+ prom_panic("Could not get token for ibm,os-term\n");
+ os_term_args.token = cpu_to_be32(token);
+ os_term_args.nargs = cpu_to_be32(1);
+ os_term_args.nret = cpu_to_be32(1);
+ os_term_args.args[0] = cpu_to_be32(__pa(str));
+ prom_rtas_hcall((uint64_t)&os_term_args);
+}
+#endif /* CONFIG_PPC_SVM */
+
+/*
+ * Allocate room for and instantiate RTAS
+ */
+static void __init prom_instantiate_rtas(void)
+{
+ phandle rtas_node;
+ ihandle rtas_inst;
+ u32 base, entry = 0;
+ __be32 val;
+ u32 size = 0;
+
+ prom_debug("prom_instantiate_rtas: start...\n");
+
+ rtas_node = call_prom("finddevice", 1, 1, ADDR("/rtas"));
+ prom_debug("rtas_node: %x\n", rtas_node);
+ if (!PHANDLE_VALID(rtas_node))
+ return;
+
+ val = 0;
+ prom_getprop(rtas_node, "rtas-size", &val, sizeof(size));
+ size = be32_to_cpu(val);
+ if (size == 0)
+ return;
+
+ base = alloc_down(size, PAGE_SIZE, 0);
+ if (base == 0)
+ prom_panic("Could not allocate memory for RTAS\n");
+
+ rtas_inst = call_prom("open", 1, 1, ADDR("/rtas"));
+ if (!IHANDLE_VALID(rtas_inst)) {
+ prom_printf("opening rtas package failed (%x)\n", rtas_inst);
+ return;
+ }
+
+ prom_printf("instantiating rtas at 0x%x...", base);
+
+ if (call_prom_ret("call-method", 3, 2, &entry,
+ ADDR("instantiate-rtas"),
+ rtas_inst, base) != 0
+ || entry == 0) {
+ prom_printf(" failed\n");
+ return;
+ }
+ prom_printf(" done\n");
+
+ reserve_mem(base, size);
+
+ val = cpu_to_be32(base);
+ prom_setprop(rtas_node, "/rtas", "linux,rtas-base",
+ &val, sizeof(val));
+ val = cpu_to_be32(entry);
+ prom_setprop(rtas_node, "/rtas", "linux,rtas-entry",
+ &val, sizeof(val));
+
+ /* Check if it supports "query-cpu-stopped-state" */
+ if (prom_getprop(rtas_node, "query-cpu-stopped-state",
+ &val, sizeof(val)) != PROM_ERROR)
+ rtas_has_query_cpu_stopped = true;
+
+ prom_debug("rtas base = 0x%x\n", base);
+ prom_debug("rtas entry = 0x%x\n", entry);
+ prom_debug("rtas size = 0x%x\n", size);
+
+ prom_debug("prom_instantiate_rtas: end...\n");
+}
+
+#ifdef CONFIG_PPC64
+/*
+ * Allocate room for and instantiate Stored Measurement Log (SML)
+ */
+static void __init prom_instantiate_sml(void)
+{
+ phandle ibmvtpm_node;
+ ihandle ibmvtpm_inst;
+ u32 entry = 0, size = 0, succ = 0;
+ u64 base;
+ __be32 val;
+
+ prom_debug("prom_instantiate_sml: start...\n");
+
+ ibmvtpm_node = call_prom("finddevice", 1, 1, ADDR("/vdevice/vtpm"));
+ prom_debug("ibmvtpm_node: %x\n", ibmvtpm_node);
+ if (!PHANDLE_VALID(ibmvtpm_node))
+ return;
+
+ ibmvtpm_inst = call_prom("open", 1, 1, ADDR("/vdevice/vtpm"));
+ if (!IHANDLE_VALID(ibmvtpm_inst)) {
+ prom_printf("opening vtpm package failed (%x)\n", ibmvtpm_inst);
+ return;
+ }
+
+ if (prom_getprop(ibmvtpm_node, "ibm,sml-efi-reformat-supported",
+ &val, sizeof(val)) != PROM_ERROR) {
+ if (call_prom_ret("call-method", 2, 2, &succ,
+ ADDR("reformat-sml-to-efi-alignment"),
+ ibmvtpm_inst) != 0 || succ == 0) {
+ prom_printf("Reformat SML to EFI alignment failed\n");
+ return;
+ }
+
+ if (call_prom_ret("call-method", 2, 2, &size,
+ ADDR("sml-get-allocated-size"),
+ ibmvtpm_inst) != 0 || size == 0) {
+ prom_printf("SML get allocated size failed\n");
+ return;
+ }
+ } else {
+ if (call_prom_ret("call-method", 2, 2, &size,
+ ADDR("sml-get-handover-size"),
+ ibmvtpm_inst) != 0 || size == 0) {
+ prom_printf("SML get handover size failed\n");
+ return;
+ }
+ }
+
+ base = alloc_down(size, PAGE_SIZE, 0);
+ if (base == 0)
+ prom_panic("Could not allocate memory for sml\n");
+
+ prom_printf("instantiating sml at 0x%llx...", base);
+
+ memset((void *)base, 0, size);
+
+ if (call_prom_ret("call-method", 4, 2, &entry,
+ ADDR("sml-handover"),
+ ibmvtpm_inst, size, base) != 0 || entry == 0) {
+ prom_printf("SML handover failed\n");
+ return;
+ }
+ prom_printf(" done\n");
+
+ reserve_mem(base, size);
+
+ prom_setprop(ibmvtpm_node, "/vdevice/vtpm", "linux,sml-base",
+ &base, sizeof(base));
+ prom_setprop(ibmvtpm_node, "/vdevice/vtpm", "linux,sml-size",
+ &size, sizeof(size));
+
+ prom_debug("sml base = 0x%llx\n", base);
+ prom_debug("sml size = 0x%x\n", size);
+
+ prom_debug("prom_instantiate_sml: end...\n");
+}
+
+/*
+ * Allocate room for and initialize TCE tables
+ */
+#ifdef __BIG_ENDIAN__
+static void __init prom_initialize_tce_table(void)
+{
+ phandle node;
+ ihandle phb_node;
+ char compatible[64], type[64], model[64];
+ char *path = prom_scratch;
+ u64 base, align;
+ u32 minalign, minsize;
+ u64 tce_entry, *tce_entryp;
+ u64 local_alloc_top, local_alloc_bottom;
+ u64 i;
+
+ if (prom_iommu_off)
+ return;
+
+ prom_debug("starting prom_initialize_tce_table\n");
+
+ /* Cache current top of allocs so we reserve a single block */
+ local_alloc_top = alloc_top_high;
+ local_alloc_bottom = local_alloc_top;
+
+ /* Search all nodes looking for PHBs. */
+ for (node = 0; prom_next_node(&node); ) {
+ compatible[0] = 0;
+ type[0] = 0;
+ model[0] = 0;
+ prom_getprop(node, "compatible",
+ compatible, sizeof(compatible));
+ prom_getprop(node, "device_type", type, sizeof(type));
+ prom_getprop(node, "model", model, sizeof(model));
+
+ if ((type[0] == 0) || (prom_strstr(type, "pci") == NULL))
+ continue;
+
+ /* Keep the old logic intact to avoid regression. */
+ if (compatible[0] != 0) {
+ if ((prom_strstr(compatible, "python") == NULL) &&
+ (prom_strstr(compatible, "Speedwagon") == NULL) &&
+ (prom_strstr(compatible, "Winnipeg") == NULL))
+ continue;
+ } else if (model[0] != 0) {
+ if ((prom_strstr(model, "ython") == NULL) &&
+ (prom_strstr(model, "peedwagon") == NULL) &&
+ (prom_strstr(model, "innipeg") == NULL))
+ continue;
+ }
+
+ if (prom_getprop(node, "tce-table-minalign", &minalign,
+ sizeof(minalign)) == PROM_ERROR)
+ minalign = 0;
+ if (prom_getprop(node, "tce-table-minsize", &minsize,
+ sizeof(minsize)) == PROM_ERROR)
+ minsize = 4UL << 20;
+
+ /*
+ * Even though we read what OF wants, we just set the table
+ * size to 4 MB. This is enough to map 2GB of PCI DMA space.
+ * By doing this, we avoid the pitfalls of trying to DMA to
+ * MMIO space and the DMA alias hole.
+ */
+ minsize = 4UL << 20;
+
+ /* Align to the greater of the align or size */
+ align = max(minalign, minsize);
+ base = alloc_down(minsize, align, 1);
+ if (base == 0)
+ prom_panic("ERROR, cannot find space for TCE table.\n");
+ if (base < local_alloc_bottom)
+ local_alloc_bottom = base;
+
+ /* It seems OF doesn't null-terminate the path :-( */
+ memset(path, 0, sizeof(prom_scratch));
+ /* Call OF to setup the TCE hardware */
+ if (call_prom("package-to-path", 3, 1, node,
+ path, sizeof(prom_scratch) - 1) == PROM_ERROR) {
+ prom_printf("package-to-path failed\n");
+ }
+
+ /* Save away the TCE table attributes for later use. */
+ prom_setprop(node, path, "linux,tce-base", &base, sizeof(base));
+ prom_setprop(node, path, "linux,tce-size", &minsize, sizeof(minsize));
+
+ prom_debug("TCE table: %s\n", path);
+ prom_debug("\tnode = 0x%x\n", node);
+ prom_debug("\tbase = 0x%llx\n", base);
+ prom_debug("\tsize = 0x%x\n", minsize);
+
+ /* Initialize the table to have a one-to-one mapping
+ * over the allocated size.
+ */
+ tce_entryp = (u64 *)base;
+ for (i = 0; i < (minsize >> 3) ;tce_entryp++, i++) {
+ tce_entry = (i << PAGE_SHIFT);
+ tce_entry |= 0x3;
+ *tce_entryp = tce_entry;
+ }
+
+ prom_printf("opening PHB %s", path);
+ phb_node = call_prom("open", 1, 1, path);
+ if (phb_node == 0)
+ prom_printf("... failed\n");
+ else
+ prom_printf("... done\n");
+
+ call_prom("call-method", 6, 0, ADDR("set-64-bit-addressing"),
+ phb_node, -1, minsize,
+ (u32) base, (u32) (base >> 32));
+ call_prom("close", 1, 0, phb_node);
+ }
+
+ reserve_mem(local_alloc_bottom, local_alloc_top - local_alloc_bottom);
+
+ /* These are only really needed if there is a memory limit in
+ * effect, but we don't know so export them always. */
+ prom_tce_alloc_start = local_alloc_bottom;
+ prom_tce_alloc_end = local_alloc_top;
+
+ /* Flag the first invalid entry */
+ prom_debug("ending prom_initialize_tce_table\n");
+}
+#endif /* __BIG_ENDIAN__ */
+#endif /* CONFIG_PPC64 */
+
+/*
+ * With CHRP SMP we need to use the OF to start the other processors.
+ * We can't wait until smp_boot_cpus (the OF is trashed by then)
+ * so we have to put the processors into a holding pattern controlled
+ * by the kernel (not OF) before we destroy the OF.
+ *
+ * This uses a chunk of low memory, puts some holding pattern
+ * code there and sends the other processors off to there until
+ * smp_boot_cpus tells them to do something. The holding pattern
+ * checks that address until its cpu # is there, when it is that
+ * cpu jumps to __secondary_start(). smp_boot_cpus() takes care
+ * of setting those values.
+ *
+ * We also use physical address 0x4 here to tell when a cpu
+ * is in its holding pattern code.
+ *
+ * -- Cort
+ */
+/*
+ * We want to reference the copy of __secondary_hold_* in the
+ * 0 - 0x100 address range
+ */
+#define LOW_ADDR(x) (((unsigned long) &(x)) & 0xff)
+
+static void __init prom_hold_cpus(void)
+{
+ unsigned long i;
+ phandle node;
+ char type[64];
+ unsigned long *spinloop
+ = (void *) LOW_ADDR(__secondary_hold_spinloop);
+ unsigned long *acknowledge
+ = (void *) LOW_ADDR(__secondary_hold_acknowledge);
+ unsigned long secondary_hold = LOW_ADDR(__secondary_hold);
+
+ /*
+ * On pseries, if RTAS supports "query-cpu-stopped-state",
+ * we skip this stage, the CPUs will be started by the
+ * kernel using RTAS.
+ */
+ if ((of_platform == PLATFORM_PSERIES ||
+ of_platform == PLATFORM_PSERIES_LPAR) &&
+ rtas_has_query_cpu_stopped) {
+ prom_printf("prom_hold_cpus: skipped\n");
+ return;
+ }
+
+ prom_debug("prom_hold_cpus: start...\n");
+ prom_debug(" 1) spinloop = 0x%lx\n", (unsigned long)spinloop);
+ prom_debug(" 1) *spinloop = 0x%lx\n", *spinloop);
+ prom_debug(" 1) acknowledge = 0x%lx\n",
+ (unsigned long)acknowledge);
+ prom_debug(" 1) *acknowledge = 0x%lx\n", *acknowledge);
+ prom_debug(" 1) secondary_hold = 0x%lx\n", secondary_hold);
+
+ /* Set the common spinloop variable, so all of the secondary cpus
+ * will block when they are awakened from their OF spinloop.
+ * This must occur for both SMP and non SMP kernels, since OF will
+ * be trashed when we move the kernel.
+ */
+ *spinloop = 0;
+
+ /* look for cpus */
+ for (node = 0; prom_next_node(&node); ) {
+ unsigned int cpu_no;
+ __be32 reg;
+
+ type[0] = 0;
+ prom_getprop(node, "device_type", type, sizeof(type));
+ if (prom_strcmp(type, "cpu") != 0)
+ continue;
+
+ /* Skip non-configured cpus. */
+ if (prom_getprop(node, "status", type, sizeof(type)) > 0)
+ if (prom_strcmp(type, "okay") != 0)
+ continue;
+
+ reg = cpu_to_be32(-1); /* make sparse happy */
+ prom_getprop(node, "reg", &reg, sizeof(reg));
+ cpu_no = be32_to_cpu(reg);
+
+ prom_debug("cpu hw idx = %u\n", cpu_no);
+
+ /* Init the acknowledge var which will be reset by
+ * the secondary cpu when it awakens from its OF
+ * spinloop.
+ */
+ *acknowledge = (unsigned long)-1;
+
+ if (cpu_no != prom.cpu) {
+ /* Primary Thread of non-boot cpu or any thread */
+ prom_printf("starting cpu hw idx %u... ", cpu_no);
+ call_prom("start-cpu", 3, 0, node,
+ secondary_hold, cpu_no);
+
+ for (i = 0; (i < 100000000) &&
+ (*acknowledge == ((unsigned long)-1)); i++ )
+ mb();
+
+ if (*acknowledge == cpu_no)
+ prom_printf("done\n");
+ else
+ prom_printf("failed: %lx\n", *acknowledge);
+ }
+#ifdef CONFIG_SMP
+ else
+ prom_printf("boot cpu hw idx %u\n", cpu_no);
+#endif /* CONFIG_SMP */
+ }
+
+ prom_debug("prom_hold_cpus: end...\n");
+}
+
+
+static void __init prom_init_client_services(unsigned long pp)
+{
+ /* Get a handle to the prom entry point before anything else */
+ prom_entry = pp;
+
+ /* get a handle for the stdout device */
+ prom.chosen = call_prom("finddevice", 1, 1, ADDR("/chosen"));
+ if (!PHANDLE_VALID(prom.chosen))
+ prom_panic("cannot find chosen"); /* msg won't be printed :( */
+
+ /* get device tree root */
+ prom.root = call_prom("finddevice", 1, 1, ADDR("/"));
+ if (!PHANDLE_VALID(prom.root))
+ prom_panic("cannot find device tree root"); /* msg won't be printed :( */
+
+ prom.mmumap = 0;
+}
+
+#ifdef CONFIG_PPC32
+/*
+ * For really old powermacs, we need to map things we claim.
+ * For that, we need the ihandle of the mmu.
+ * Also, on the longtrail, we need to work around other bugs.
+ */
+static void __init prom_find_mmu(void)
+{
+ phandle oprom;
+ char version[64];
+
+ oprom = call_prom("finddevice", 1, 1, ADDR("/openprom"));
+ if (!PHANDLE_VALID(oprom))
+ return;
+ if (prom_getprop(oprom, "model", version, sizeof(version)) <= 0)
+ return;
+ version[sizeof(version) - 1] = 0;
+ /* XXX might need to add other versions here */
+ if (prom_strcmp(version, "Open Firmware, 1.0.5") == 0)
+ of_workarounds = OF_WA_CLAIM;
+ else if (prom_strncmp(version, "FirmWorks,3.", 12) == 0) {
+ of_workarounds = OF_WA_CLAIM | OF_WA_LONGTRAIL;
+ call_prom("interpret", 1, 1, "dev /memory 0 to allow-reclaim");
+ } else
+ return;
+ prom.memory = call_prom("open", 1, 1, ADDR("/memory"));
+ prom_getprop(prom.chosen, "mmu", &prom.mmumap,
+ sizeof(prom.mmumap));
+ prom.mmumap = be32_to_cpu(prom.mmumap);
+ if (!IHANDLE_VALID(prom.memory) || !IHANDLE_VALID(prom.mmumap))
+ of_workarounds &= ~OF_WA_CLAIM; /* hmmm */
+}
+#else
+#define prom_find_mmu()
+#endif
+
+static void __init prom_init_stdout(void)
+{
+ char *path = of_stdout_device;
+ char type[16];
+ phandle stdout_node;
+ __be32 val;
+
+ if (prom_getprop(prom.chosen, "stdout", &val, sizeof(val)) <= 0)
+ prom_panic("cannot find stdout");
+
+ prom.stdout = be32_to_cpu(val);
+
+ /* Get the full OF pathname of the stdout device */
+ memset(path, 0, 256);
+ call_prom("instance-to-path", 3, 1, prom.stdout, path, 255);
+ prom_printf("OF stdout device is: %s\n", of_stdout_device);
+ prom_setprop(prom.chosen, "/chosen", "linux,stdout-path",
+ path, prom_strlen(path) + 1);
+
+ /* instance-to-package fails on PA-Semi */
+ stdout_node = call_prom("instance-to-package", 1, 1, prom.stdout);
+ if (stdout_node != PROM_ERROR) {
+ val = cpu_to_be32(stdout_node);
+
+ /* If it's a display, note it */
+ memset(type, 0, sizeof(type));
+ prom_getprop(stdout_node, "device_type", type, sizeof(type));
+ if (prom_strcmp(type, "display") == 0)
+ prom_setprop(stdout_node, path, "linux,boot-display", NULL, 0);
+ }
+}
+
+static int __init prom_find_machine_type(void)
+{
+ char compat[256];
+ int len, i = 0;
+#ifdef CONFIG_PPC64
+ phandle rtas;
+ int x;
+#endif
+
+ /* Look for a PowerMac or a Cell */
+ len = prom_getprop(prom.root, "compatible",
+ compat, sizeof(compat)-1);
+ if (len > 0) {
+ compat[len] = 0;
+ while (i < len) {
+ char *p = &compat[i];
+ int sl = prom_strlen(p);
+ if (sl == 0)
+ break;
+ if (prom_strstr(p, "Power Macintosh") ||
+ prom_strstr(p, "MacRISC"))
+ return PLATFORM_POWERMAC;
+#ifdef CONFIG_PPC64
+ /* We must make sure we don't detect the IBM Cell
+ * blades as pSeries due to some firmware issues,
+ * so we do it here.
+ */
+ if (prom_strstr(p, "IBM,CBEA") ||
+ prom_strstr(p, "IBM,CPBW-1.0"))
+ return PLATFORM_GENERIC;
+#endif /* CONFIG_PPC64 */
+ i += sl + 1;
+ }
+ }
+#ifdef CONFIG_PPC64
+ /* Try to figure out if it's an IBM pSeries or any other
+ * PAPR compliant platform. We assume it is if :
+ * - /device_type is "chrp" (please, do NOT use that for future
+ * non-IBM designs !
+ * - it has /rtas
+ */
+ len = prom_getprop(prom.root, "device_type",
+ compat, sizeof(compat)-1);
+ if (len <= 0)
+ return PLATFORM_GENERIC;
+ if (prom_strcmp(compat, "chrp"))
+ return PLATFORM_GENERIC;
+
+ /* Default to pSeries. We need to know if we are running LPAR */
+ rtas = call_prom("finddevice", 1, 1, ADDR("/rtas"));
+ if (!PHANDLE_VALID(rtas))
+ return PLATFORM_GENERIC;
+ x = prom_getproplen(rtas, "ibm,hypertas-functions");
+ if (x != PROM_ERROR) {
+ prom_debug("Hypertas detected, assuming LPAR !\n");
+ return PLATFORM_PSERIES_LPAR;
+ }
+ return PLATFORM_PSERIES;
+#else
+ return PLATFORM_GENERIC;
+#endif
+}
+
+static int __init prom_set_color(ihandle ih, int i, int r, int g, int b)
+{
+ return call_prom("call-method", 6, 1, ADDR("color!"), ih, i, b, g, r);
+}
+
+/*
+ * If we have a display that we don't know how to drive,
+ * we will want to try to execute OF's open method for it
+ * later. However, OF will probably fall over if we do that
+ * we've taken over the MMU.
+ * So we check whether we will need to open the display,
+ * and if so, open it now.
+ */
+static void __init prom_check_displays(void)
+{
+ char type[16], *path;
+ phandle node;
+ ihandle ih;
+ int i;
+
+ static const unsigned char default_colors[] __initconst = {
+ 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0xaa,
+ 0x00, 0xaa, 0x00,
+ 0x00, 0xaa, 0xaa,
+ 0xaa, 0x00, 0x00,
+ 0xaa, 0x00, 0xaa,
+ 0xaa, 0xaa, 0x00,
+ 0xaa, 0xaa, 0xaa,
+ 0x55, 0x55, 0x55,
+ 0x55, 0x55, 0xff,
+ 0x55, 0xff, 0x55,
+ 0x55, 0xff, 0xff,
+ 0xff, 0x55, 0x55,
+ 0xff, 0x55, 0xff,
+ 0xff, 0xff, 0x55,
+ 0xff, 0xff, 0xff
+ };
+ const unsigned char *clut;
+
+ prom_debug("Looking for displays\n");
+ for (node = 0; prom_next_node(&node); ) {
+ memset(type, 0, sizeof(type));
+ prom_getprop(node, "device_type", type, sizeof(type));
+ if (prom_strcmp(type, "display") != 0)
+ continue;
+
+ /* It seems OF doesn't null-terminate the path :-( */
+ path = prom_scratch;
+ memset(path, 0, sizeof(prom_scratch));
+
+ /*
+ * leave some room at the end of the path for appending extra
+ * arguments
+ */
+ if (call_prom("package-to-path", 3, 1, node, path,
+ sizeof(prom_scratch) - 10) == PROM_ERROR)
+ continue;
+ prom_printf("found display : %s, opening... ", path);
+
+ ih = call_prom("open", 1, 1, path);
+ if (ih == 0) {
+ prom_printf("failed\n");
+ continue;
+ }
+
+ /* Success */
+ prom_printf("done\n");
+ prom_setprop(node, path, "linux,opened", NULL, 0);
+
+ /* Setup a usable color table when the appropriate
+ * method is available. Should update this to set-colors */
+ clut = default_colors;
+ for (i = 0; i < 16; i++, clut += 3)
+ if (prom_set_color(ih, i, clut[0], clut[1],
+ clut[2]) != 0)
+ break;
+
+#ifdef CONFIG_LOGO_LINUX_CLUT224
+ clut = PTRRELOC(logo_linux_clut224.clut);
+ for (i = 0; i < logo_linux_clut224.clutsize; i++, clut += 3)
+ if (prom_set_color(ih, i + 32, clut[0], clut[1],
+ clut[2]) != 0)
+ break;
+#endif /* CONFIG_LOGO_LINUX_CLUT224 */
+
+#ifdef CONFIG_PPC_EARLY_DEBUG_BOOTX
+ if (prom_getprop(node, "linux,boot-display", NULL, 0) !=
+ PROM_ERROR) {
+ u32 width, height, pitch, addr;
+
+ prom_printf("Setting btext !\n");
+
+ if (prom_getprop(node, "width", &width, 4) == PROM_ERROR)
+ return;
+
+ if (prom_getprop(node, "height", &height, 4) == PROM_ERROR)
+ return;
+
+ if (prom_getprop(node, "linebytes", &pitch, 4) == PROM_ERROR)
+ return;
+
+ if (prom_getprop(node, "address", &addr, 4) == PROM_ERROR)
+ return;
+
+ prom_printf("W=%d H=%d LB=%d addr=0x%x\n",
+ width, height, pitch, addr);
+ btext_setup_display(width, height, 8, pitch, addr);
+ btext_prepare_BAT();
+ }
+#endif /* CONFIG_PPC_EARLY_DEBUG_BOOTX */
+ }
+}
+
+
+/* Return (relocated) pointer to this much memory: moves initrd if reqd. */
+static void __init *make_room(unsigned long *mem_start, unsigned long *mem_end,
+ unsigned long needed, unsigned long align)
+{
+ void *ret;
+
+ *mem_start = ALIGN(*mem_start, align);
+ while ((*mem_start + needed) > *mem_end) {
+ unsigned long room, chunk;
+
+ prom_debug("Chunk exhausted, claiming more at %lx...\n",
+ alloc_bottom);
+ room = alloc_top - alloc_bottom;
+ if (room > DEVTREE_CHUNK_SIZE)
+ room = DEVTREE_CHUNK_SIZE;
+ if (room < PAGE_SIZE)
+ prom_panic("No memory for flatten_device_tree "
+ "(no room)\n");
+ chunk = alloc_up(room, 0);
+ if (chunk == 0)
+ prom_panic("No memory for flatten_device_tree "
+ "(claim failed)\n");
+ *mem_end = chunk + room;
+ }
+
+ ret = (void *)*mem_start;
+ *mem_start += needed;
+
+ return ret;
+}
+
+#define dt_push_token(token, mem_start, mem_end) do { \
+ void *room = make_room(mem_start, mem_end, 4, 4); \
+ *(__be32 *)room = cpu_to_be32(token); \
+ } while(0)
+
+static unsigned long __init dt_find_string(char *str)
+{
+ char *s, *os;
+
+ s = os = (char *)dt_string_start;
+ s += 4;
+ while (s < (char *)dt_string_end) {
+ if (prom_strcmp(s, str) == 0)
+ return s - os;
+ s += prom_strlen(s) + 1;
+ }
+ return 0;
+}
+
+/*
+ * The Open Firmware 1275 specification states properties must be 31 bytes or
+ * less, however not all firmwares obey this. Make it 64 bytes to be safe.
+ */
+#define MAX_PROPERTY_NAME 64
+
+static void __init scan_dt_build_strings(phandle node,
+ unsigned long *mem_start,
+ unsigned long *mem_end)
+{
+ char *prev_name, *namep, *sstart;
+ unsigned long soff;
+ phandle child;
+
+ sstart = (char *)dt_string_start;
+
+ /* get and store all property names */
+ prev_name = "";
+ for (;;) {
+ /* 64 is max len of name including nul. */
+ namep = make_room(mem_start, mem_end, MAX_PROPERTY_NAME, 1);
+ if (call_prom("nextprop", 3, 1, node, prev_name, namep) != 1) {
+ /* No more nodes: unwind alloc */
+ *mem_start = (unsigned long)namep;
+ break;
+ }
+
+ /* skip "name" */
+ if (prom_strcmp(namep, "name") == 0) {
+ *mem_start = (unsigned long)namep;
+ prev_name = "name";
+ continue;
+ }
+ /* get/create string entry */
+ soff = dt_find_string(namep);
+ if (soff != 0) {
+ *mem_start = (unsigned long)namep;
+ namep = sstart + soff;
+ } else {
+ /* Trim off some if we can */
+ *mem_start = (unsigned long)namep + prom_strlen(namep) + 1;
+ dt_string_end = *mem_start;
+ }
+ prev_name = namep;
+ }
+
+ /* do all our children */
+ child = call_prom("child", 1, 1, node);
+ while (child != 0) {
+ scan_dt_build_strings(child, mem_start, mem_end);
+ child = call_prom("peer", 1, 1, child);
+ }
+}
+
+static void __init scan_dt_build_struct(phandle node, unsigned long *mem_start,
+ unsigned long *mem_end)
+{
+ phandle child;
+ char *namep, *prev_name, *sstart, *p, *ep, *lp, *path;
+ unsigned long soff;
+ unsigned char *valp;
+ static char pname[MAX_PROPERTY_NAME] __prombss;
+ int l, room, has_phandle = 0;
+
+ dt_push_token(OF_DT_BEGIN_NODE, mem_start, mem_end);
+
+ /* get the node's full name */
+ namep = (char *)*mem_start;
+ room = *mem_end - *mem_start;
+ if (room > 255)
+ room = 255;
+ l = call_prom("package-to-path", 3, 1, node, namep, room);
+ if (l >= 0) {
+ /* Didn't fit? Get more room. */
+ if (l >= room) {
+ if (l >= *mem_end - *mem_start)
+ namep = make_room(mem_start, mem_end, l+1, 1);
+ call_prom("package-to-path", 3, 1, node, namep, l);
+ }
+ namep[l] = '\0';
+
+ /* Fixup an Apple bug where they have bogus \0 chars in the
+ * middle of the path in some properties, and extract
+ * the unit name (everything after the last '/').
+ */
+ for (lp = p = namep, ep = namep + l; p < ep; p++) {
+ if (*p == '/')
+ lp = namep;
+ else if (*p != 0)
+ *lp++ = *p;
+ }
+ *lp = 0;
+ *mem_start = ALIGN((unsigned long)lp + 1, 4);
+ }
+
+ /* get it again for debugging */
+ path = prom_scratch;
+ memset(path, 0, sizeof(prom_scratch));
+ call_prom("package-to-path", 3, 1, node, path, sizeof(prom_scratch) - 1);
+
+ /* get and store all properties */
+ prev_name = "";
+ sstart = (char *)dt_string_start;
+ for (;;) {
+ if (call_prom("nextprop", 3, 1, node, prev_name,
+ pname) != 1)
+ break;
+
+ /* skip "name" */
+ if (prom_strcmp(pname, "name") == 0) {
+ prev_name = "name";
+ continue;
+ }
+
+ /* find string offset */
+ soff = dt_find_string(pname);
+ if (soff == 0) {
+ prom_printf("WARNING: Can't find string index for"
+ " <%s>, node %s\n", pname, path);
+ break;
+ }
+ prev_name = sstart + soff;
+
+ /* get length */
+ l = call_prom("getproplen", 2, 1, node, pname);
+
+ /* sanity checks */
+ if (l == PROM_ERROR)
+ continue;
+
+ /* push property head */
+ dt_push_token(OF_DT_PROP, mem_start, mem_end);
+ dt_push_token(l, mem_start, mem_end);
+ dt_push_token(soff, mem_start, mem_end);
+
+ /* push property content */
+ valp = make_room(mem_start, mem_end, l, 4);
+ call_prom("getprop", 4, 1, node, pname, valp, l);
+ *mem_start = ALIGN(*mem_start, 4);
+
+ if (!prom_strcmp(pname, "phandle"))
+ has_phandle = 1;
+ }
+
+ /* Add a "phandle" property if none already exist */
+ if (!has_phandle) {
+ soff = dt_find_string("phandle");
+ if (soff == 0)
+ prom_printf("WARNING: Can't find string index for <phandle> node %s\n", path);
+ else {
+ dt_push_token(OF_DT_PROP, mem_start, mem_end);
+ dt_push_token(4, mem_start, mem_end);
+ dt_push_token(soff, mem_start, mem_end);
+ valp = make_room(mem_start, mem_end, 4, 4);
+ *(__be32 *)valp = cpu_to_be32(node);
+ }
+ }
+
+ /* do all our children */
+ child = call_prom("child", 1, 1, node);
+ while (child != 0) {
+ scan_dt_build_struct(child, mem_start, mem_end);
+ child = call_prom("peer", 1, 1, child);
+ }
+
+ dt_push_token(OF_DT_END_NODE, mem_start, mem_end);
+}
+
+static void __init flatten_device_tree(void)
+{
+ phandle root;
+ unsigned long mem_start, mem_end, room;
+ struct boot_param_header *hdr;
+ char *namep;
+ u64 *rsvmap;
+
+ /*
+ * Check how much room we have between alloc top & bottom (+/- a
+ * few pages), crop to 1MB, as this is our "chunk" size
+ */
+ room = alloc_top - alloc_bottom - 0x4000;
+ if (room > DEVTREE_CHUNK_SIZE)
+ room = DEVTREE_CHUNK_SIZE;
+ prom_debug("starting device tree allocs at %lx\n", alloc_bottom);
+
+ /* Now try to claim that */
+ mem_start = (unsigned long)alloc_up(room, PAGE_SIZE);
+ if (mem_start == 0)
+ prom_panic("Can't allocate initial device-tree chunk\n");
+ mem_end = mem_start + room;
+
+ /* Get root of tree */
+ root = call_prom("peer", 1, 1, (phandle)0);
+ if (root == (phandle)0)
+ prom_panic ("couldn't get device tree root\n");
+
+ /* Build header and make room for mem rsv map */
+ mem_start = ALIGN(mem_start, 4);
+ hdr = make_room(&mem_start, &mem_end,
+ sizeof(struct boot_param_header), 4);
+ dt_header_start = (unsigned long)hdr;
+ rsvmap = make_room(&mem_start, &mem_end, sizeof(mem_reserve_map), 8);
+
+ /* Start of strings */
+ mem_start = PAGE_ALIGN(mem_start);
+ dt_string_start = mem_start;
+ mem_start += 4; /* hole */
+
+ /* Add "phandle" in there, we'll need it */
+ namep = make_room(&mem_start, &mem_end, 16, 1);
+ prom_strcpy(namep, "phandle");
+ mem_start = (unsigned long)namep + prom_strlen(namep) + 1;
+
+ /* Build string array */
+ prom_printf("Building dt strings...\n");
+ scan_dt_build_strings(root, &mem_start, &mem_end);
+ dt_string_end = mem_start;
+
+ /* Build structure */
+ mem_start = PAGE_ALIGN(mem_start);
+ dt_struct_start = mem_start;
+ prom_printf("Building dt structure...\n");
+ scan_dt_build_struct(root, &mem_start, &mem_end);
+ dt_push_token(OF_DT_END, &mem_start, &mem_end);
+ dt_struct_end = PAGE_ALIGN(mem_start);
+
+ /* Finish header */
+ hdr->boot_cpuid_phys = cpu_to_be32(prom.cpu);
+ hdr->magic = cpu_to_be32(OF_DT_HEADER);
+ hdr->totalsize = cpu_to_be32(dt_struct_end - dt_header_start);
+ hdr->off_dt_struct = cpu_to_be32(dt_struct_start - dt_header_start);
+ hdr->off_dt_strings = cpu_to_be32(dt_string_start - dt_header_start);
+ hdr->dt_strings_size = cpu_to_be32(dt_string_end - dt_string_start);
+ hdr->off_mem_rsvmap = cpu_to_be32(((unsigned long)rsvmap) - dt_header_start);
+ hdr->version = cpu_to_be32(OF_DT_VERSION);
+ /* Version 16 is not backward compatible */
+ hdr->last_comp_version = cpu_to_be32(0x10);
+
+ /* Copy the reserve map in */
+ memcpy(rsvmap, mem_reserve_map, sizeof(mem_reserve_map));
+
+#ifdef DEBUG_PROM
+ {
+ int i;
+ prom_printf("reserved memory map:\n");
+ for (i = 0; i < mem_reserve_cnt; i++)
+ prom_printf(" %llx - %llx\n",
+ be64_to_cpu(mem_reserve_map[i].base),
+ be64_to_cpu(mem_reserve_map[i].size));
+ }
+#endif
+ /* Bump mem_reserve_cnt to cause further reservations to fail
+ * since it's too late.
+ */
+ mem_reserve_cnt = MEM_RESERVE_MAP_SIZE;
+
+ prom_printf("Device tree strings 0x%lx -> 0x%lx\n",
+ dt_string_start, dt_string_end);
+ prom_printf("Device tree struct 0x%lx -> 0x%lx\n",
+ dt_struct_start, dt_struct_end);
+}
+
+#ifdef CONFIG_PPC_MAPLE
+/* PIBS Version 1.05.0000 04/26/2005 has an incorrect /ht/isa/ranges property.
+ * The values are bad, and it doesn't even have the right number of cells. */
+static void __init fixup_device_tree_maple(void)
+{
+ phandle isa;
+ u32 rloc = 0x01002000; /* IO space; PCI device = 4 */
+ u32 isa_ranges[6];
+ char *name;
+
+ name = "/ht@0/isa@4";
+ isa = call_prom("finddevice", 1, 1, ADDR(name));
+ if (!PHANDLE_VALID(isa)) {
+ name = "/ht@0/isa@6";
+ isa = call_prom("finddevice", 1, 1, ADDR(name));
+ rloc = 0x01003000; /* IO space; PCI device = 6 */
+ }
+ if (!PHANDLE_VALID(isa))
+ return;
+
+ if (prom_getproplen(isa, "ranges") != 12)
+ return;
+ if (prom_getprop(isa, "ranges", isa_ranges, sizeof(isa_ranges))
+ == PROM_ERROR)
+ return;
+
+ if (isa_ranges[0] != 0x1 ||
+ isa_ranges[1] != 0xf4000000 ||
+ isa_ranges[2] != 0x00010000)
+ return;
+
+ prom_printf("Fixing up bogus ISA range on Maple/Apache...\n");
+
+ isa_ranges[0] = 0x1;
+ isa_ranges[1] = 0x0;
+ isa_ranges[2] = rloc;
+ isa_ranges[3] = 0x0;
+ isa_ranges[4] = 0x0;
+ isa_ranges[5] = 0x00010000;
+ prom_setprop(isa, name, "ranges",
+ isa_ranges, sizeof(isa_ranges));
+}
+
+#define CPC925_MC_START 0xf8000000
+#define CPC925_MC_LENGTH 0x1000000
+/* The values for memory-controller don't have right number of cells */
+static void __init fixup_device_tree_maple_memory_controller(void)
+{
+ phandle mc;
+ u32 mc_reg[4];
+ char *name = "/hostbridge@f8000000";
+ u32 ac, sc;
+
+ mc = call_prom("finddevice", 1, 1, ADDR(name));
+ if (!PHANDLE_VALID(mc))
+ return;
+
+ if (prom_getproplen(mc, "reg") != 8)
+ return;
+
+ prom_getprop(prom.root, "#address-cells", &ac, sizeof(ac));
+ prom_getprop(prom.root, "#size-cells", &sc, sizeof(sc));
+ if ((ac != 2) || (sc != 2))
+ return;
+
+ if (prom_getprop(mc, "reg", mc_reg, sizeof(mc_reg)) == PROM_ERROR)
+ return;
+
+ if (mc_reg[0] != CPC925_MC_START || mc_reg[1] != CPC925_MC_LENGTH)
+ return;
+
+ prom_printf("Fixing up bogus hostbridge on Maple...\n");
+
+ mc_reg[0] = 0x0;
+ mc_reg[1] = CPC925_MC_START;
+ mc_reg[2] = 0x0;
+ mc_reg[3] = CPC925_MC_LENGTH;
+ prom_setprop(mc, name, "reg", mc_reg, sizeof(mc_reg));
+}
+#else
+#define fixup_device_tree_maple()
+#define fixup_device_tree_maple_memory_controller()
+#endif
+
+#ifdef CONFIG_PPC_CHRP
+/*
+ * Pegasos and BriQ lacks the "ranges" property in the isa node
+ * Pegasos needs decimal IRQ 14/15, not hexadecimal
+ * Pegasos has the IDE configured in legacy mode, but advertised as native
+ */
+static void __init fixup_device_tree_chrp(void)
+{
+ phandle ph;
+ u32 prop[6];
+ u32 rloc = 0x01006000; /* IO space; PCI device = 12 */
+ char *name;
+ int rc;
+
+ name = "/pci@80000000/isa@c";
+ ph = call_prom("finddevice", 1, 1, ADDR(name));
+ if (!PHANDLE_VALID(ph)) {
+ name = "/pci@ff500000/isa@6";
+ ph = call_prom("finddevice", 1, 1, ADDR(name));
+ rloc = 0x01003000; /* IO space; PCI device = 6 */
+ }
+ if (PHANDLE_VALID(ph)) {
+ rc = prom_getproplen(ph, "ranges");
+ if (rc == 0 || rc == PROM_ERROR) {
+ prom_printf("Fixing up missing ISA range on Pegasos...\n");
+
+ prop[0] = 0x1;
+ prop[1] = 0x0;
+ prop[2] = rloc;
+ prop[3] = 0x0;
+ prop[4] = 0x0;
+ prop[5] = 0x00010000;
+ prom_setprop(ph, name, "ranges", prop, sizeof(prop));
+ }
+ }
+
+ name = "/pci@80000000/ide@C,1";
+ ph = call_prom("finddevice", 1, 1, ADDR(name));
+ if (PHANDLE_VALID(ph)) {
+ prom_printf("Fixing up IDE interrupt on Pegasos...\n");
+ prop[0] = 14;
+ prop[1] = 0x0;
+ prom_setprop(ph, name, "interrupts", prop, 2*sizeof(u32));
+ prom_printf("Fixing up IDE class-code on Pegasos...\n");
+ rc = prom_getprop(ph, "class-code", prop, sizeof(u32));
+ if (rc == sizeof(u32)) {
+ prop[0] &= ~0x5;
+ prom_setprop(ph, name, "class-code", prop, sizeof(u32));
+ }
+ }
+}
+#else
+#define fixup_device_tree_chrp()
+#endif
+
+#if defined(CONFIG_PPC64) && defined(CONFIG_PPC_PMAC)
+static void __init fixup_device_tree_pmac(void)
+{
+ phandle u3, i2c, mpic;
+ u32 u3_rev;
+ u32 interrupts[2];
+ u32 parent;
+
+ /* Some G5s have a missing interrupt definition, fix it up here */
+ u3 = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000"));
+ if (!PHANDLE_VALID(u3))
+ return;
+ i2c = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/i2c@f8001000"));
+ if (!PHANDLE_VALID(i2c))
+ return;
+ mpic = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/mpic@f8040000"));
+ if (!PHANDLE_VALID(mpic))
+ return;
+
+ /* check if proper rev of u3 */
+ if (prom_getprop(u3, "device-rev", &u3_rev, sizeof(u3_rev))
+ == PROM_ERROR)
+ return;
+ if (u3_rev < 0x35 || u3_rev > 0x39)
+ return;
+ /* does it need fixup ? */
+ if (prom_getproplen(i2c, "interrupts") > 0)
+ return;
+
+ prom_printf("fixing up bogus interrupts for u3 i2c...\n");
+
+ /* interrupt on this revision of u3 is number 0 and level */
+ interrupts[0] = 0;
+ interrupts[1] = 1;
+ prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupts",
+ &interrupts, sizeof(interrupts));
+ parent = (u32)mpic;
+ prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupt-parent",
+ &parent, sizeof(parent));
+}
+#else
+#define fixup_device_tree_pmac()
+#endif
+
+#ifdef CONFIG_PPC_EFIKA
+/*
+ * The MPC5200 FEC driver requires an phy-handle property to tell it how
+ * to talk to the phy. If the phy-handle property is missing, then this
+ * function is called to add the appropriate nodes and link it to the
+ * ethernet node.
+ */
+static void __init fixup_device_tree_efika_add_phy(void)
+{
+ u32 node;
+ char prop[64];
+ int rv;
+
+ /* Check if /builtin/ethernet exists - bail if it doesn't */
+ node = call_prom("finddevice", 1, 1, ADDR("/builtin/ethernet"));
+ if (!PHANDLE_VALID(node))
+ return;
+
+ /* Check if the phy-handle property exists - bail if it does */
+ rv = prom_getprop(node, "phy-handle", prop, sizeof(prop));
+ if (rv <= 0)
+ return;
+
+ /*
+ * At this point the ethernet device doesn't have a phy described.
+ * Now we need to add the missing phy node and linkage
+ */
+
+ /* Check for an MDIO bus node - if missing then create one */
+ node = call_prom("finddevice", 1, 1, ADDR("/builtin/mdio"));
+ if (!PHANDLE_VALID(node)) {
+ prom_printf("Adding Ethernet MDIO node\n");
+ call_prom("interpret", 1, 1,
+ " s\" /builtin\" find-device"
+ " new-device"
+ " 1 encode-int s\" #address-cells\" property"
+ " 0 encode-int s\" #size-cells\" property"
+ " s\" mdio\" device-name"
+ " s\" fsl,mpc5200b-mdio\" encode-string"
+ " s\" compatible\" property"
+ " 0xf0003000 0x400 reg"
+ " 0x2 encode-int"
+ " 0x5 encode-int encode+"
+ " 0x3 encode-int encode+"
+ " s\" interrupts\" property"
+ " finish-device");
+ };
+
+ /* Check for a PHY device node - if missing then create one and
+ * give it's phandle to the ethernet node */
+ node = call_prom("finddevice", 1, 1,
+ ADDR("/builtin/mdio/ethernet-phy"));
+ if (!PHANDLE_VALID(node)) {
+ prom_printf("Adding Ethernet PHY node\n");
+ call_prom("interpret", 1, 1,
+ " s\" /builtin/mdio\" find-device"
+ " new-device"
+ " s\" ethernet-phy\" device-name"
+ " 0x10 encode-int s\" reg\" property"
+ " my-self"
+ " ihandle>phandle"
+ " finish-device"
+ " s\" /builtin/ethernet\" find-device"
+ " encode-int"
+ " s\" phy-handle\" property"
+ " device-end");
+ }
+}
+
+static void __init fixup_device_tree_efika(void)
+{
+ int sound_irq[3] = { 2, 2, 0 };
+ int bcomm_irq[3*16] = { 3,0,0, 3,1,0, 3,2,0, 3,3,0,
+ 3,4,0, 3,5,0, 3,6,0, 3,7,0,
+ 3,8,0, 3,9,0, 3,10,0, 3,11,0,
+ 3,12,0, 3,13,0, 3,14,0, 3,15,0 };
+ u32 node;
+ char prop[64];
+ int rv, len;
+
+ /* Check if we're really running on a EFIKA */
+ node = call_prom("finddevice", 1, 1, ADDR("/"));
+ if (!PHANDLE_VALID(node))
+ return;
+
+ rv = prom_getprop(node, "model", prop, sizeof(prop));
+ if (rv == PROM_ERROR)
+ return;
+ if (prom_strcmp(prop, "EFIKA5K2"))
+ return;
+
+ prom_printf("Applying EFIKA device tree fixups\n");
+
+ /* Claiming to be 'chrp' is death */
+ node = call_prom("finddevice", 1, 1, ADDR("/"));
+ rv = prom_getprop(node, "device_type", prop, sizeof(prop));
+ if (rv != PROM_ERROR && (prom_strcmp(prop, "chrp") == 0))
+ prom_setprop(node, "/", "device_type", "efika", sizeof("efika"));
+
+ /* CODEGEN,description is exposed in /proc/cpuinfo so
+ fix that too */
+ rv = prom_getprop(node, "CODEGEN,description", prop, sizeof(prop));
+ if (rv != PROM_ERROR && (prom_strstr(prop, "CHRP")))
+ prom_setprop(node, "/", "CODEGEN,description",
+ "Efika 5200B PowerPC System",
+ sizeof("Efika 5200B PowerPC System"));
+
+ /* Fixup bestcomm interrupts property */
+ node = call_prom("finddevice", 1, 1, ADDR("/builtin/bestcomm"));
+ if (PHANDLE_VALID(node)) {
+ len = prom_getproplen(node, "interrupts");
+ if (len == 12) {
+ prom_printf("Fixing bestcomm interrupts property\n");
+ prom_setprop(node, "/builtin/bestcom", "interrupts",
+ bcomm_irq, sizeof(bcomm_irq));
+ }
+ }
+
+ /* Fixup sound interrupts property */
+ node = call_prom("finddevice", 1, 1, ADDR("/builtin/sound"));
+ if (PHANDLE_VALID(node)) {
+ rv = prom_getprop(node, "interrupts", prop, sizeof(prop));
+ if (rv == PROM_ERROR) {
+ prom_printf("Adding sound interrupts property\n");
+ prom_setprop(node, "/builtin/sound", "interrupts",
+ sound_irq, sizeof(sound_irq));
+ }
+ }
+
+ /* Make sure ethernet phy-handle property exists */
+ fixup_device_tree_efika_add_phy();
+}
+#else
+#define fixup_device_tree_efika()
+#endif
+
+#ifdef CONFIG_PPC_PASEMI_NEMO
+/*
+ * CFE supplied on Nemo is broken in several ways, biggest
+ * problem is that it reassigns ISA interrupts to unused mpic ints.
+ * Add an interrupt-controller property for the io-bridge to use
+ * and correct the ints so we can attach them to an irq_domain
+ */
+static void __init fixup_device_tree_pasemi(void)
+{
+ u32 interrupts[2], parent, rval, val = 0;
+ char *name, *pci_name;
+ phandle iob, node;
+
+ /* Find the root pci node */
+ name = "/pxp@0,e0000000";
+ iob = call_prom("finddevice", 1, 1, ADDR(name));
+ if (!PHANDLE_VALID(iob))
+ return;
+
+ /* check if interrupt-controller node set yet */
+ if (prom_getproplen(iob, "interrupt-controller") !=PROM_ERROR)
+ return;
+
+ prom_printf("adding interrupt-controller property for SB600...\n");
+
+ prom_setprop(iob, name, "interrupt-controller", &val, 0);
+
+ pci_name = "/pxp@0,e0000000/pci@11";
+ node = call_prom("finddevice", 1, 1, ADDR(pci_name));
+ parent = ADDR(iob);
+
+ for( ; prom_next_node(&node); ) {
+ /* scan each node for one with an interrupt */
+ if (!PHANDLE_VALID(node))
+ continue;
+
+ rval = prom_getproplen(node, "interrupts");
+ if (rval == 0 || rval == PROM_ERROR)
+ continue;
+
+ prom_getprop(node, "interrupts", &interrupts, sizeof(interrupts));
+ if ((interrupts[0] < 212) || (interrupts[0] > 222))
+ continue;
+
+ /* found a node, update both interrupts and interrupt-parent */
+ if ((interrupts[0] >= 212) && (interrupts[0] <= 215))
+ interrupts[0] -= 203;
+ if ((interrupts[0] >= 216) && (interrupts[0] <= 220))
+ interrupts[0] -= 213;
+ if (interrupts[0] == 221)
+ interrupts[0] = 14;
+ if (interrupts[0] == 222)
+ interrupts[0] = 8;
+
+ prom_setprop(node, pci_name, "interrupts", interrupts,
+ sizeof(interrupts));
+ prom_setprop(node, pci_name, "interrupt-parent", &parent,
+ sizeof(parent));
+ }
+
+ /*
+ * The io-bridge has device_type set to 'io-bridge' change it to 'isa'
+ * so that generic isa-bridge code can add the SB600 and its on-board
+ * peripherals.
+ */
+ name = "/pxp@0,e0000000/io-bridge@0";
+ iob = call_prom("finddevice", 1, 1, ADDR(name));
+ if (!PHANDLE_VALID(iob))
+ return;
+
+ /* device_type is already set, just change it. */
+
+ prom_printf("Changing device_type of SB600 node...\n");
+
+ prom_setprop(iob, name, "device_type", "isa", sizeof("isa"));
+}
+#else /* !CONFIG_PPC_PASEMI_NEMO */
+static inline void fixup_device_tree_pasemi(void) { }
+#endif
+
+static void __init fixup_device_tree(void)
+{
+ fixup_device_tree_maple();
+ fixup_device_tree_maple_memory_controller();
+ fixup_device_tree_chrp();
+ fixup_device_tree_pmac();
+ fixup_device_tree_efika();
+ fixup_device_tree_pasemi();
+}
+
+static void __init prom_find_boot_cpu(void)
+{
+ __be32 rval;
+ ihandle prom_cpu;
+ phandle cpu_pkg;
+
+ rval = 0;
+ if (prom_getprop(prom.chosen, "cpu", &rval, sizeof(rval)) <= 0)
+ return;
+ prom_cpu = be32_to_cpu(rval);
+
+ cpu_pkg = call_prom("instance-to-package", 1, 1, prom_cpu);
+
+ if (!PHANDLE_VALID(cpu_pkg))
+ return;
+
+ prom_getprop(cpu_pkg, "reg", &rval, sizeof(rval));
+ prom.cpu = be32_to_cpu(rval);
+
+ prom_debug("Booting CPU hw index = %d\n", prom.cpu);
+}
+
+static void __init prom_check_initrd(unsigned long r3, unsigned long r4)
+{
+#ifdef CONFIG_BLK_DEV_INITRD
+ if (r3 && r4 && r4 != 0xdeadbeef) {
+ __be64 val;
+
+ prom_initrd_start = is_kernel_addr(r3) ? __pa(r3) : r3;
+ prom_initrd_end = prom_initrd_start + r4;
+
+ val = cpu_to_be64(prom_initrd_start);
+ prom_setprop(prom.chosen, "/chosen", "linux,initrd-start",
+ &val, sizeof(val));
+ val = cpu_to_be64(prom_initrd_end);
+ prom_setprop(prom.chosen, "/chosen", "linux,initrd-end",
+ &val, sizeof(val));
+
+ reserve_mem(prom_initrd_start,
+ prom_initrd_end - prom_initrd_start);
+
+ prom_debug("initrd_start=0x%lx\n", prom_initrd_start);
+ prom_debug("initrd_end=0x%lx\n", prom_initrd_end);
+ }
+#endif /* CONFIG_BLK_DEV_INITRD */
+}
+
+#ifdef CONFIG_PPC64
+#ifdef CONFIG_RELOCATABLE
+static void reloc_toc(void)
+{
+}
+
+static void unreloc_toc(void)
+{
+}
+#else
+static void __reloc_toc(unsigned long offset, unsigned long nr_entries)
+{
+ unsigned long i;
+ unsigned long *toc_entry;
+
+ /* Get the start of the TOC by using r2 directly. */
+ asm volatile("addi %0,2,-0x8000" : "=b" (toc_entry));
+
+ for (i = 0; i < nr_entries; i++) {
+ *toc_entry = *toc_entry + offset;
+ toc_entry++;
+ }
+}
+
+static void reloc_toc(void)
+{
+ unsigned long offset = reloc_offset();
+ unsigned long nr_entries =
+ (__prom_init_toc_end - __prom_init_toc_start) / sizeof(long);
+
+ __reloc_toc(offset, nr_entries);
+
+ mb();
+}
+
+static void unreloc_toc(void)
+{
+ unsigned long offset = reloc_offset();
+ unsigned long nr_entries =
+ (__prom_init_toc_end - __prom_init_toc_start) / sizeof(long);
+
+ mb();
+
+ __reloc_toc(-offset, nr_entries);
+}
+#endif
+#endif
+
+#ifdef CONFIG_PPC_SVM
+/*
+ * Perform the Enter Secure Mode ultracall.
+ */
+static int enter_secure_mode(unsigned long kbase, unsigned long fdt)
+{
+ register unsigned long r3 asm("r3") = UV_ESM;
+ register unsigned long r4 asm("r4") = kbase;
+ register unsigned long r5 asm("r5") = fdt;
+
+ asm volatile("sc 2" : "+r"(r3) : "r"(r4), "r"(r5));
+
+ return r3;
+}
+
+/*
+ * Call the Ultravisor to transfer us to secure memory if we have an ESM blob.
+ */
+static void __init setup_secure_guest(unsigned long kbase, unsigned long fdt)
+{
+ int ret;
+
+ if (!prom_svm_enable)
+ return;
+
+ /* Switch to secure mode. */
+ prom_printf("Switching to secure mode.\n");
+
+ /*
+ * The ultravisor will do an integrity check of the kernel image but we
+ * relocated it so the check will fail. Restore the original image by
+ * relocating it back to the kernel virtual base address.
+ */
+ if (IS_ENABLED(CONFIG_RELOCATABLE))
+ relocate(KERNELBASE);
+
+ ret = enter_secure_mode(kbase, fdt);
+
+ /* Relocate the kernel again. */
+ if (IS_ENABLED(CONFIG_RELOCATABLE))
+ relocate(kbase);
+
+ if (ret != U_SUCCESS) {
+ prom_printf("Returned %d from switching to secure mode.\n", ret);
+ prom_rtas_os_term("Switch to secure mode failed.\n");
+ }
+}
+#else
+static void __init setup_secure_guest(unsigned long kbase, unsigned long fdt)
+{
+}
+#endif /* CONFIG_PPC_SVM */
+
+/*
+ * We enter here early on, when the Open Firmware prom is still
+ * handling exceptions and the MMU hash table for us.
+ */
+
+unsigned long __init prom_init(unsigned long r3, unsigned long r4,
+ unsigned long pp,
+ unsigned long r6, unsigned long r7,
+ unsigned long kbase)
+{
+ unsigned long hdr;
+
+#ifdef CONFIG_PPC32
+ unsigned long offset = reloc_offset();
+ reloc_got2(offset);
+#else
+ reloc_toc();
+#endif
+
+ /*
+ * First zero the BSS
+ */
+ memset(&__bss_start, 0, __bss_stop - __bss_start);
+
+ /*
+ * Init interface to Open Firmware, get some node references,
+ * like /chosen
+ */
+ prom_init_client_services(pp);
+
+ /*
+ * See if this OF is old enough that we need to do explicit maps
+ * and other workarounds
+ */
+ prom_find_mmu();
+
+ /*
+ * Init prom stdout device
+ */
+ prom_init_stdout();
+
+ prom_printf("Preparing to boot %s", linux_banner);
+
+ /*
+ * Get default machine type. At this point, we do not differentiate
+ * between pSeries SMP and pSeries LPAR
+ */
+ of_platform = prom_find_machine_type();
+ prom_printf("Detected machine type: %x\n", of_platform);
+
+#ifndef CONFIG_NONSTATIC_KERNEL
+ /* Bail if this is a kdump kernel. */
+ if (PHYSICAL_START > 0)
+ prom_panic("Error: You can't boot a kdump kernel from OF!\n");
+#endif
+
+ /*
+ * Check for an initrd
+ */
+ prom_check_initrd(r3, r4);
+
+ /*
+ * Do early parsing of command line
+ */
+ early_cmdline_parse();
+
+#ifdef CONFIG_PPC_PSERIES
+ /*
+ * On pSeries, inform the firmware about our capabilities
+ */
+ if (of_platform == PLATFORM_PSERIES ||
+ of_platform == PLATFORM_PSERIES_LPAR)
+ prom_send_capabilities();
+#endif
+
+ /*
+ * Copy the CPU hold code
+ */
+ if (of_platform != PLATFORM_POWERMAC)
+ copy_and_flush(0, kbase, 0x100, 0);
+
+ /*
+ * Initialize memory management within prom_init
+ */
+ prom_init_mem();
+
+ /*
+ * Determine which cpu is actually running right _now_
+ */
+ prom_find_boot_cpu();
+
+ /*
+ * Initialize display devices
+ */
+ prom_check_displays();
+
+#if defined(CONFIG_PPC64) && defined(__BIG_ENDIAN__)
+ /*
+ * Initialize IOMMU (TCE tables) on pSeries. Do that before anything else
+ * that uses the allocator, we need to make sure we get the top of memory
+ * available for us here...
+ */
+ if (of_platform == PLATFORM_PSERIES)
+ prom_initialize_tce_table();
+#endif
+
+ /*
+ * On non-powermacs, try to instantiate RTAS. PowerMacs don't
+ * have a usable RTAS implementation.
+ */
+ if (of_platform != PLATFORM_POWERMAC)
+ prom_instantiate_rtas();
+
+#ifdef CONFIG_PPC64
+ /* instantiate sml */
+ prom_instantiate_sml();
+#endif
+
+ /*
+ * On non-powermacs, put all CPUs in spin-loops.
+ *
+ * PowerMacs use a different mechanism to spin CPUs
+ *
+ * (This must be done after instanciating RTAS)
+ */
+ if (of_platform != PLATFORM_POWERMAC)
+ prom_hold_cpus();
+
+ /*
+ * Fill in some infos for use by the kernel later on
+ */
+ if (prom_memory_limit) {
+ __be64 val = cpu_to_be64(prom_memory_limit);
+ prom_setprop(prom.chosen, "/chosen", "linux,memory-limit",
+ &val, sizeof(val));
+ }
+#ifdef CONFIG_PPC64
+ if (prom_iommu_off)
+ prom_setprop(prom.chosen, "/chosen", "linux,iommu-off",
+ NULL, 0);
+
+ if (prom_iommu_force_on)
+ prom_setprop(prom.chosen, "/chosen", "linux,iommu-force-on",
+ NULL, 0);
+
+ if (prom_tce_alloc_start) {
+ prom_setprop(prom.chosen, "/chosen", "linux,tce-alloc-start",
+ &prom_tce_alloc_start,
+ sizeof(prom_tce_alloc_start));
+ prom_setprop(prom.chosen, "/chosen", "linux,tce-alloc-end",
+ &prom_tce_alloc_end,
+ sizeof(prom_tce_alloc_end));
+ }
+#endif
+
+ /*
+ * Fixup any known bugs in the device-tree
+ */
+ fixup_device_tree();
+
+ /*
+ * Now finally create the flattened device-tree
+ */
+ prom_printf("copying OF device tree...\n");
+ flatten_device_tree();
+
+ /*
+ * in case stdin is USB and still active on IBM machines...
+ * Unfortunately quiesce crashes on some powermacs if we have
+ * closed stdin already (in particular the powerbook 101).
+ */
+ if (of_platform != PLATFORM_POWERMAC)
+ prom_close_stdin();
+
+ /*
+ * Call OF "quiesce" method to shut down pending DMA's from
+ * devices etc...
+ */
+ prom_printf("Quiescing Open Firmware ...\n");
+ call_prom("quiesce", 0, 0);
+
+ /*
+ * And finally, call the kernel passing it the flattened device
+ * tree and NULL as r5, thus triggering the new entry point which
+ * is common to us and kexec
+ */
+ hdr = dt_header_start;
+
+ prom_printf("Booting Linux via __start() @ 0x%lx ...\n", kbase);
+ prom_debug("->dt_header_start=0x%lx\n", hdr);
+
+#ifdef CONFIG_PPC32
+ reloc_got2(-offset);
+#else
+ unreloc_toc();
+#endif
+
+ /* Move to secure memory if we're supposed to be secure guests. */
+ setup_secure_guest(kbase, hdr);
+
+ __start(hdr, kbase, 0, 0, 0, 0, 0);
+
+ return 0;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-09 20:14:43 +0000