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-rw-r--r--arch/ia64/hp/sim/boot/fw-emu.c374
1 files changed, 374 insertions, 0 deletions
diff --git a/arch/ia64/hp/sim/boot/fw-emu.c b/arch/ia64/hp/sim/boot/fw-emu.c
new file mode 100644
index 000000000..517fb2822
--- /dev/null
+++ b/arch/ia64/hp/sim/boot/fw-emu.c
@@ -0,0 +1,374 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * PAL & SAL emulation.
+ *
+ * Copyright (C) 1998-2001 Hewlett-Packard Co
+ * David Mosberger-Tang <davidm@hpl.hp.com>
+ */
+
+#ifdef CONFIG_PCI
+# include <linux/pci.h>
+#endif
+
+#include <linux/efi.h>
+#include <asm/io.h>
+#include <asm/pal.h>
+#include <asm/sal.h>
+#include <asm/setup.h>
+
+#include "ssc.h"
+
+#define MB (1024*1024UL)
+
+#define SIMPLE_MEMMAP 1
+
+#if SIMPLE_MEMMAP
+# define NUM_MEM_DESCS 4
+#else
+# define NUM_MEM_DESCS 16
+#endif
+
+static char fw_mem[( sizeof(struct ia64_boot_param)
+ + sizeof(efi_system_table_t)
+ + sizeof(efi_runtime_services_t)
+ + 1*sizeof(efi_config_table_t)
+ + sizeof(struct ia64_sal_systab)
+ + sizeof(struct ia64_sal_desc_entry_point)
+ + NUM_MEM_DESCS*(sizeof(efi_memory_desc_t))
+ + 1024)] __attribute__ ((aligned (8)));
+
+#define SECS_PER_HOUR (60 * 60)
+#define SECS_PER_DAY (SECS_PER_HOUR * 24)
+
+/* Compute the `struct tm' representation of *T,
+ offset OFFSET seconds east of UTC,
+ and store year, yday, mon, mday, wday, hour, min, sec into *TP.
+ Return nonzero if successful. */
+int
+offtime (unsigned long t, efi_time_t *tp)
+{
+ const unsigned short int __mon_yday[2][13] =
+ {
+ /* Normal years. */
+ { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 },
+ /* Leap years. */
+ { 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 }
+ };
+ long int days, rem, y;
+ const unsigned short int *ip;
+
+ days = t / SECS_PER_DAY;
+ rem = t % SECS_PER_DAY;
+ while (rem < 0) {
+ rem += SECS_PER_DAY;
+ --days;
+ }
+ while (rem >= SECS_PER_DAY) {
+ rem -= SECS_PER_DAY;
+ ++days;
+ }
+ tp->hour = rem / SECS_PER_HOUR;
+ rem %= SECS_PER_HOUR;
+ tp->minute = rem / 60;
+ tp->second = rem % 60;
+ /* January 1, 1970 was a Thursday. */
+ y = 1970;
+
+# define DIV(a, b) ((a) / (b) - ((a) % (b) < 0))
+# define LEAPS_THRU_END_OF(y) (DIV (y, 4) - DIV (y, 100) + DIV (y, 400))
+# define __isleap(year) \
+ ((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0))
+
+ while (days < 0 || days >= (__isleap (y) ? 366 : 365)) {
+ /* Guess a corrected year, assuming 365 days per year. */
+ long int yg = y + days / 365 - (days % 365 < 0);
+
+ /* Adjust DAYS and Y to match the guessed year. */
+ days -= ((yg - y) * 365 + LEAPS_THRU_END_OF (yg - 1)
+ - LEAPS_THRU_END_OF (y - 1));
+ y = yg;
+ }
+ tp->year = y;
+ ip = __mon_yday[__isleap(y)];
+ for (y = 11; days < (long int) ip[y]; --y)
+ continue;
+ days -= ip[y];
+ tp->month = y + 1;
+ tp->day = days + 1;
+ return 1;
+}
+
+extern void pal_emulator_static (void);
+
+/* Macro to emulate SAL call using legacy IN and OUT calls to CF8, CFC etc.. */
+
+#define BUILD_CMD(addr) ((0x80000000 | (addr)) & ~3)
+
+#define REG_OFFSET(addr) (0x00000000000000FF & (addr))
+#define DEVICE_FUNCTION(addr) (0x000000000000FF00 & (addr))
+#define BUS_NUMBER(addr) (0x0000000000FF0000 & (addr))
+
+static efi_status_t
+fw_efi_get_time (efi_time_t *tm, efi_time_cap_t *tc)
+{
+#if defined(CONFIG_IA64_HP_SIM) || defined(CONFIG_IA64_GENERIC)
+ struct {
+ int tv_sec; /* must be 32bits to work */
+ int tv_usec;
+ } tv32bits;
+
+ ssc((unsigned long) &tv32bits, 0, 0, 0, SSC_GET_TOD);
+
+ memset(tm, 0, sizeof(*tm));
+ offtime(tv32bits.tv_sec, tm);
+
+ if (tc)
+ memset(tc, 0, sizeof(*tc));
+#else
+# error Not implemented yet...
+#endif
+ return EFI_SUCCESS;
+}
+
+static void
+efi_reset_system (int reset_type, efi_status_t status, unsigned long data_size, efi_char16_t *data)
+{
+#if defined(CONFIG_IA64_HP_SIM) || defined(CONFIG_IA64_GENERIC)
+ ssc(status, 0, 0, 0, SSC_EXIT);
+#else
+# error Not implemented yet...
+#endif
+}
+
+static efi_status_t
+efi_unimplemented (void)
+{
+ return EFI_UNSUPPORTED;
+}
+
+static struct sal_ret_values
+sal_emulator (long index, unsigned long in1, unsigned long in2,
+ unsigned long in3, unsigned long in4, unsigned long in5,
+ unsigned long in6, unsigned long in7)
+{
+ long r9 = 0;
+ long r10 = 0;
+ long r11 = 0;
+ long status;
+
+ /*
+ * Don't do a "switch" here since that gives us code that
+ * isn't self-relocatable.
+ */
+ status = 0;
+ if (index == SAL_FREQ_BASE) {
+ if (in1 == SAL_FREQ_BASE_PLATFORM)
+ r9 = 200000000;
+ else if (in1 == SAL_FREQ_BASE_INTERVAL_TIMER) {
+ /*
+ * Is this supposed to be the cr.itc frequency
+ * or something platform specific? The SAL
+ * doc ain't exactly clear on this...
+ */
+ r9 = 700000000;
+ } else if (in1 == SAL_FREQ_BASE_REALTIME_CLOCK)
+ r9 = 1;
+ else
+ status = -1;
+ } else if (index == SAL_SET_VECTORS) {
+ ;
+ } else if (index == SAL_GET_STATE_INFO) {
+ ;
+ } else if (index == SAL_GET_STATE_INFO_SIZE) {
+ ;
+ } else if (index == SAL_CLEAR_STATE_INFO) {
+ ;
+ } else if (index == SAL_MC_RENDEZ) {
+ ;
+ } else if (index == SAL_MC_SET_PARAMS) {
+ ;
+ } else if (index == SAL_CACHE_FLUSH) {
+ ;
+ } else if (index == SAL_CACHE_INIT) {
+ ;
+#ifdef CONFIG_PCI
+ } else if (index == SAL_PCI_CONFIG_READ) {
+ /*
+ * in1 contains the PCI configuration address and in2
+ * the size of the read. The value that is read is
+ * returned via the general register r9.
+ */
+ outl(BUILD_CMD(in1), 0xCF8);
+ if (in2 == 1) /* Reading byte */
+ r9 = inb(0xCFC + ((REG_OFFSET(in1) & 3)));
+ else if (in2 == 2) /* Reading word */
+ r9 = inw(0xCFC + ((REG_OFFSET(in1) & 2)));
+ else /* Reading dword */
+ r9 = inl(0xCFC);
+ status = PCIBIOS_SUCCESSFUL;
+ } else if (index == SAL_PCI_CONFIG_WRITE) {
+ /*
+ * in1 contains the PCI configuration address, in2 the
+ * size of the write, and in3 the actual value to be
+ * written out.
+ */
+ outl(BUILD_CMD(in1), 0xCF8);
+ if (in2 == 1) /* Writing byte */
+ outb(in3, 0xCFC + ((REG_OFFSET(in1) & 3)));
+ else if (in2 == 2) /* Writing word */
+ outw(in3, 0xCFC + ((REG_OFFSET(in1) & 2)));
+ else /* Writing dword */
+ outl(in3, 0xCFC);
+ status = PCIBIOS_SUCCESSFUL;
+#endif /* CONFIG_PCI */
+ } else if (index == SAL_UPDATE_PAL) {
+ ;
+ } else {
+ status = -1;
+ }
+ return ((struct sal_ret_values) {status, r9, r10, r11});
+}
+
+struct ia64_boot_param *
+sys_fw_init (const char *args, int arglen)
+{
+ efi_system_table_t *efi_systab;
+ efi_runtime_services_t *efi_runtime;
+ efi_config_table_t *efi_tables;
+ struct ia64_sal_systab *sal_systab;
+ efi_memory_desc_t *efi_memmap, *md;
+ unsigned long *pal_desc, *sal_desc;
+ struct ia64_sal_desc_entry_point *sal_ed;
+ struct ia64_boot_param *bp;
+ unsigned char checksum = 0;
+ char *cp, *cmd_line;
+ int i = 0;
+# define MAKE_MD(typ, attr, start, end) \
+ do { \
+ md = efi_memmap + i++; \
+ md->type = typ; \
+ md->pad = 0; \
+ md->phys_addr = start; \
+ md->virt_addr = 0; \
+ md->num_pages = (end - start) >> 12; \
+ md->attribute = attr; \
+ } while (0)
+
+ memset(fw_mem, 0, sizeof(fw_mem));
+
+ pal_desc = (unsigned long *) &pal_emulator_static;
+ sal_desc = (unsigned long *) &sal_emulator;
+
+ cp = fw_mem;
+ efi_systab = (void *) cp; cp += sizeof(*efi_systab);
+ efi_runtime = (void *) cp; cp += sizeof(*efi_runtime);
+ efi_tables = (void *) cp; cp += sizeof(*efi_tables);
+ sal_systab = (void *) cp; cp += sizeof(*sal_systab);
+ sal_ed = (void *) cp; cp += sizeof(*sal_ed);
+ efi_memmap = (void *) cp; cp += NUM_MEM_DESCS*sizeof(*efi_memmap);
+ bp = (void *) cp; cp += sizeof(*bp);
+ cmd_line = (void *) cp;
+
+ if (args) {
+ if (arglen >= 1024)
+ arglen = 1023;
+ memcpy(cmd_line, args, arglen);
+ } else {
+ arglen = 0;
+ }
+ cmd_line[arglen] = '\0';
+
+ memset(efi_systab, 0, sizeof(*efi_systab));
+ efi_systab->hdr.signature = EFI_SYSTEM_TABLE_SIGNATURE;
+ efi_systab->hdr.revision = ((1 << 16) | 00);
+ efi_systab->hdr.headersize = sizeof(efi_systab->hdr);
+ efi_systab->fw_vendor = __pa("H\0e\0w\0l\0e\0t\0t\0-\0P\0a\0c\0k\0a\0r\0d\0\0");
+ efi_systab->fw_revision = 1;
+ efi_systab->runtime = (void *) __pa(efi_runtime);
+ efi_systab->nr_tables = 1;
+ efi_systab->tables = __pa(efi_tables);
+
+ efi_runtime->hdr.signature = EFI_RUNTIME_SERVICES_SIGNATURE;
+ efi_runtime->hdr.revision = EFI_RUNTIME_SERVICES_REVISION;
+ efi_runtime->hdr.headersize = sizeof(efi_runtime->hdr);
+ efi_runtime->get_time = (void *)__pa(&fw_efi_get_time);
+ efi_runtime->set_time = (void *)__pa(&efi_unimplemented);
+ efi_runtime->get_wakeup_time = (void *)__pa(&efi_unimplemented);
+ efi_runtime->set_wakeup_time = (void *)__pa(&efi_unimplemented);
+ efi_runtime->set_virtual_address_map = (void *)__pa(&efi_unimplemented);
+ efi_runtime->get_variable = (void *)__pa(&efi_unimplemented);
+ efi_runtime->get_next_variable = (void *)__pa(&efi_unimplemented);
+ efi_runtime->set_variable = (void *)__pa(&efi_unimplemented);
+ efi_runtime->get_next_high_mono_count = (void *)__pa(&efi_unimplemented);
+ efi_runtime->reset_system = (void *)__pa(&efi_reset_system);
+
+ efi_tables->guid = SAL_SYSTEM_TABLE_GUID;
+ efi_tables->table = __pa(sal_systab);
+
+ /* fill in the SAL system table: */
+ memcpy(sal_systab->signature, "SST_", 4);
+ sal_systab->size = sizeof(*sal_systab);
+ sal_systab->sal_rev_minor = 1;
+ sal_systab->sal_rev_major = 0;
+ sal_systab->entry_count = 1;
+
+#ifdef CONFIG_IA64_GENERIC
+ strcpy(sal_systab->oem_id, "Generic");
+ strcpy(sal_systab->product_id, "IA-64 system");
+#endif
+
+#ifdef CONFIG_IA64_HP_SIM
+ strcpy(sal_systab->oem_id, "Hewlett-Packard");
+ strcpy(sal_systab->product_id, "HP-simulator");
+#endif
+
+ /* fill in an entry point: */
+ sal_ed->type = SAL_DESC_ENTRY_POINT;
+ sal_ed->pal_proc = __pa(pal_desc[0]);
+ sal_ed->sal_proc = __pa(sal_desc[0]);
+ sal_ed->gp = __pa(sal_desc[1]);
+
+ for (cp = (char *) sal_systab; cp < (char *) efi_memmap; ++cp)
+ checksum += *cp;
+
+ sal_systab->checksum = -checksum;
+
+#if SIMPLE_MEMMAP
+ /* simulate free memory at physical address zero */
+ MAKE_MD(EFI_BOOT_SERVICES_DATA, EFI_MEMORY_WB, 0*MB, 1*MB);
+ MAKE_MD(EFI_PAL_CODE, EFI_MEMORY_WB, 1*MB, 2*MB);
+ MAKE_MD(EFI_CONVENTIONAL_MEMORY, EFI_MEMORY_WB, 2*MB, 130*MB);
+ MAKE_MD(EFI_CONVENTIONAL_MEMORY, EFI_MEMORY_WB, 4096*MB, 4128*MB);
+#else
+ MAKE_MD( 4, 0x9, 0x0000000000000000, 0x0000000000001000);
+ MAKE_MD( 7, 0x9, 0x0000000000001000, 0x000000000008a000);
+ MAKE_MD( 4, 0x9, 0x000000000008a000, 0x00000000000a0000);
+ MAKE_MD( 5, 0x8000000000000009, 0x00000000000c0000, 0x0000000000100000);
+ MAKE_MD( 7, 0x9, 0x0000000000100000, 0x0000000004400000);
+ MAKE_MD( 2, 0x9, 0x0000000004400000, 0x0000000004be5000);
+ MAKE_MD( 7, 0x9, 0x0000000004be5000, 0x000000007f77e000);
+ MAKE_MD( 6, 0x8000000000000009, 0x000000007f77e000, 0x000000007fb94000);
+ MAKE_MD( 6, 0x8000000000000009, 0x000000007fb94000, 0x000000007fb95000);
+ MAKE_MD( 6, 0x8000000000000009, 0x000000007fb95000, 0x000000007fc00000);
+ MAKE_MD(13, 0x8000000000000009, 0x000000007fc00000, 0x000000007fc3a000);
+ MAKE_MD( 7, 0x9, 0x000000007fc3a000, 0x000000007fea0000);
+ MAKE_MD( 5, 0x8000000000000009, 0x000000007fea0000, 0x000000007fea8000);
+ MAKE_MD( 7, 0x9, 0x000000007fea8000, 0x000000007feab000);
+ MAKE_MD( 5, 0x8000000000000009, 0x000000007feab000, 0x000000007ffff000);
+ MAKE_MD( 7, 0x9, 0x00000000ff400000, 0x0000000104000000);
+#endif
+
+ bp->efi_systab = __pa(&fw_mem);
+ bp->efi_memmap = __pa(efi_memmap);
+ bp->efi_memmap_size = NUM_MEM_DESCS*sizeof(efi_memory_desc_t);
+ bp->efi_memdesc_size = sizeof(efi_memory_desc_t);
+ bp->efi_memdesc_version = 1;
+ bp->command_line = __pa(cmd_line);
+ bp->console_info.num_cols = 80;
+ bp->console_info.num_rows = 25;
+ bp->console_info.orig_x = 0;
+ bp->console_info.orig_y = 24;
+ bp->fpswa = 0;
+
+ return bp;
+}
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