diff options
Diffstat (limited to 'arch/mips/fw/arc')
| -rw-r--r-- | arch/mips/fw/arc/Makefile | 15 | ||||
| -rw-r--r-- | arch/mips/fw/arc/arc_con.c | 54 | ||||
| -rw-r--r-- | arch/mips/fw/arc/cmdline.c | 110 | ||||
| -rw-r--r-- | arch/mips/fw/arc/env.c | 21 | ||||
| -rw-r--r-- | arch/mips/fw/arc/file.c | 25 | ||||
| -rw-r--r-- | arch/mips/fw/arc/identify.c | 111 | ||||
| -rw-r--r-- | arch/mips/fw/arc/init.c | 51 | ||||
| -rw-r--r-- | arch/mips/fw/arc/memory.c | 192 | ||||
| -rw-r--r-- | arch/mips/fw/arc/misc.c | 36 | ||||
| -rw-r--r-- | arch/mips/fw/arc/promlib.c | 61 |
10 files changed, 676 insertions, 0 deletions
diff --git a/arch/mips/fw/arc/Makefile b/arch/mips/fw/arc/Makefile new file mode 100644 index 000000000..64d685efc --- /dev/null +++ b/arch/mips/fw/arc/Makefile @@ -0,0 +1,15 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# Makefile for the ARC prom monitor library routines under Linux. +# + +ifdef CONFIG_ARC_CMDLINE_ONLY +lib-y += cmdline.o +else +lib-y += cmdline.o env.o file.o identify.o init.o \ + misc.o +endif + +lib-$(CONFIG_ARC_MEMORY) += memory.o +lib-$(CONFIG_ARC_CONSOLE) += arc_con.o +lib-$(CONFIG_ARC_PROMLIB) += promlib.o diff --git a/arch/mips/fw/arc/arc_con.c b/arch/mips/fw/arc/arc_con.c new file mode 100644 index 000000000..7fdce236b --- /dev/null +++ b/arch/mips/fw/arc/arc_con.c @@ -0,0 +1,54 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Wrap-around code for a console using the + * ARC io-routines. + * + * Copyright (c) 1998 Harald Koerfgen + * Copyright (c) 2001 Ralf Baechle + * Copyright (c) 2002 Thiemo Seufer + */ +#include <linux/tty.h> +#include <linux/major.h> +#include <linux/init.h> +#include <linux/console.h> +#include <linux/fs.h> +#include <asm/setup.h> +#include <asm/sgialib.h> + +static void prom_console_write(struct console *co, const char *s, + unsigned count) +{ + /* Do each character */ + while (count--) { + if (*s == '\n') + prom_putchar('\r'); + prom_putchar(*s++); + } +} + +static int prom_console_setup(struct console *co, char *options) +{ + if (prom_flags & PROM_FLAG_USE_AS_CONSOLE) + return 0; + return -ENODEV; +} + +static struct console arc_cons = { + .name = "arc", + .write = prom_console_write, + .setup = prom_console_setup, + .flags = CON_PRINTBUFFER, + .index = -1, +}; + +/* + * Register console. + */ + +static int __init arc_console_init(void) +{ + register_console(&arc_cons); + + return 0; +} +console_initcall(arc_console_init); diff --git a/arch/mips/fw/arc/cmdline.c b/arch/mips/fw/arc/cmdline.c new file mode 100644 index 000000000..155c5e911 --- /dev/null +++ b/arch/mips/fw/arc/cmdline.c @@ -0,0 +1,110 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * cmdline.c: Kernel command line creation using ARCS argc/argv. + * + * Copyright (C) 1996 David S. Miller (davem@davemloft.net) + */ +#include <linux/bug.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/string.h> + +#include <asm/sgialib.h> +#include <asm/bootinfo.h> + +#undef DEBUG_CMDLINE + +/* + * A 32-bit ARC PROM pass arguments and environment as 32-bit pointer. + * These macro take care of sign extension. + */ +#define prom_argv(index) ((char *) (long)argv[(index)]) + +static char *ignored[] = { + "ConsoleIn=", + "ConsoleOut=", + "SystemPartition=", + "OSLoader=", + "OSLoadPartition=", + "OSLoadFilename=", + "OSLoadOptions=" +}; + +static char *used_arc[][2] = { + { "OSLoadPartition=", "root=" }, + { "OSLoadOptions=", "" } +}; + +static char __init *move_firmware_args(int argc, LONG *argv, char *cp) +{ + char *s; + int actr, i; + + actr = 1; /* Always ignore argv[0] */ + + while (actr < argc) { + for(i = 0; i < ARRAY_SIZE(used_arc); i++) { + int len = strlen(used_arc[i][0]); + + if (!strncmp(prom_argv(actr), used_arc[i][0], len)) { + /* Ok, we want it. First append the replacement... */ + strcat(cp, used_arc[i][1]); + cp += strlen(used_arc[i][1]); + /* ... and now the argument */ + s = strchr(prom_argv(actr), '='); + if (s) { + s++; + strcpy(cp, s); + cp += strlen(s); + } + *cp++ = ' '; + break; + } + } + actr++; + } + + return cp; +} + +void __init prom_init_cmdline(int argc, LONG *argv) +{ + char *cp; + int actr, i; + + actr = 1; /* Always ignore argv[0] */ + + cp = arcs_cmdline; + /* + * Move ARC variables to the beginning to make sure they can be + * overridden by later arguments. + */ + cp = move_firmware_args(argc, argv, cp); + + while (actr < argc) { + for (i = 0; i < ARRAY_SIZE(ignored); i++) { + int len = strlen(ignored[i]); + + if (!strncmp(prom_argv(actr), ignored[i], len)) + goto pic_cont; + } + /* Ok, we want it. */ + strcpy(cp, prom_argv(actr)); + cp += strlen(prom_argv(actr)); + *cp++ = ' '; + + pic_cont: + actr++; + } + + if (cp != arcs_cmdline) /* get rid of trailing space */ + --cp; + *cp = '\0'; + +#ifdef DEBUG_CMDLINE + printk(KERN_DEBUG "prom cmdline: %s\n", arcs_cmdline); +#endif +} diff --git a/arch/mips/fw/arc/env.c b/arch/mips/fw/arc/env.c new file mode 100644 index 000000000..02407a7bb --- /dev/null +++ b/arch/mips/fw/arc/env.c @@ -0,0 +1,21 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * env.c: ARCS environment variable routines. + * + * Copyright (C) 1996 David S. Miller (davem@davemloft.net) + */ +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/string.h> + +#include <asm/fw/arc/types.h> +#include <asm/sgialib.h> + +PCHAR __init +ArcGetEnvironmentVariable(CHAR *name) +{ + return (CHAR *) ARC_CALL1(get_evar, name); +} diff --git a/arch/mips/fw/arc/file.c b/arch/mips/fw/arc/file.c new file mode 100644 index 000000000..b0d8535c8 --- /dev/null +++ b/arch/mips/fw/arc/file.c @@ -0,0 +1,25 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * ARC firmware interface. + * + * Copyright (C) 1994, 1995, 1996, 1999 Ralf Baechle + * Copyright (C) 1999 Silicon Graphics, Inc. + */ + +#include <asm/fw/arc/types.h> +#include <asm/sgialib.h> + +LONG +ArcRead(ULONG FileID, VOID *Buffer, ULONG N, ULONG *Count) +{ + return ARC_CALL4(read, FileID, Buffer, N, Count); +} + +LONG +ArcWrite(ULONG FileID, PVOID Buffer, ULONG N, PULONG Count) +{ + return ARC_CALL4(write, FileID, Buffer, N, Count); +} diff --git a/arch/mips/fw/arc/identify.c b/arch/mips/fw/arc/identify.c new file mode 100644 index 000000000..5527e0f54 --- /dev/null +++ b/arch/mips/fw/arc/identify.c @@ -0,0 +1,111 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * identify.c: identify machine by looking up system identifier + * + * Copyright (C) 1998 Thomas Bogendoerfer + * + * This code is based on arch/mips/sgi/kernel/system.c, which is + * + * Copyright (C) 1996 David S. Miller (davem@davemloft.net) + */ +#include <linux/bug.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/types.h> +#include <linux/string.h> + +#include <asm/sgialib.h> +#include <asm/bootinfo.h> + +struct smatch { + char *arcname; + char *liname; + int flags; +}; + +static struct smatch mach_table[] = { + { + .arcname = "SGI-IP22", + .liname = "SGI Indy", + .flags = PROM_FLAG_ARCS, + }, { + .arcname = "SGI-IP28", + .liname = "SGI IP28", + .flags = PROM_FLAG_ARCS, + }, { + .arcname = "SGI-IP30", + .liname = "SGI Octane", + .flags = PROM_FLAG_ARCS, + }, { + .arcname = "SGI-IP32", + .liname = "SGI O2", + .flags = PROM_FLAG_ARCS, + }, { + .arcname = "Microsoft-Jazz", + .liname = "Jazz MIPS_Magnum_4000", + .flags = 0, + }, { + .arcname = "PICA-61", + .liname = "Jazz Acer_PICA_61", + .flags = 0, + }, { + .arcname = "RM200PCI", + .liname = "SNI RM200_PCI", + .flags = PROM_FLAG_DONT_FREE_TEMP, + }, { + .arcname = "RM200PCI-R5K", + .liname = "SNI RM200_PCI-R5K", + .flags = PROM_FLAG_DONT_FREE_TEMP, + } +}; + +int prom_flags; + +static struct smatch * __init string_to_mach(const char *s) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(mach_table); i++) { + if (!strcmp(s, mach_table[i].arcname)) + return &mach_table[i]; + } + + panic("Yeee, could not determine architecture type <%s>", s); +} + +char *system_type; + +const char *get_system_type(void) +{ + return system_type; +} + +static pcomponent * __init ArcGetChild(pcomponent *Current) +{ + return (pcomponent *) ARC_CALL1(child_component, Current); +} + +void __init prom_identify_arch(void) +{ + pcomponent *p; + struct smatch *mach; + const char *iname; + + /* + * The root component tells us what machine architecture we have here. + */ + p = ArcGetChild(PROM_NULL_COMPONENT); + if (p == NULL) { + iname = "Unknown"; + } else + iname = (char *) (long) p->iname; + + printk("ARCH: %s\n", iname); + mach = string_to_mach(iname); + system_type = mach->liname; + + prom_flags = mach->flags; +} diff --git a/arch/mips/fw/arc/init.c b/arch/mips/fw/arc/init.c new file mode 100644 index 000000000..f9d1dea9b --- /dev/null +++ b/arch/mips/fw/arc/init.c @@ -0,0 +1,51 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * PROM library initialisation code. + * + * Copyright (C) 1996 David S. Miller (davem@davemloft.net) + */ +#include <linux/init.h> +#include <linux/kernel.h> + +#include <asm/bootinfo.h> +#include <asm/sgialib.h> +#include <asm/smp-ops.h> + +#undef DEBUG_PROM_INIT + +/* Master romvec interface. */ +struct linux_romvec *romvec; + +#if defined(CONFIG_64BIT) && defined(CONFIG_FW_ARC32) +/* stack for calling 32bit ARC prom */ +u64 o32_stk[4096]; +#endif + +void __init prom_init(void) +{ + PSYSTEM_PARAMETER_BLOCK pb = PROMBLOCK; + + romvec = ROMVECTOR; + + if (pb->magic != 0x53435241) { + printk(KERN_CRIT "Aieee, bad prom vector magic %08lx\n", + (unsigned long) pb->magic); + while(1) + ; + } + + prom_init_cmdline(fw_arg0, (LONG *)fw_arg1); + prom_identify_arch(); + printk(KERN_INFO "PROMLIB: ARC firmware Version %d Revision %d\n", + pb->ver, pb->rev); + prom_meminit(); + +#ifdef DEBUG_PROM_INIT + pr_info("Press a key to reboot\n"); + ArcRead(0, &c, 1, &cnt); + ArcEnterInteractiveMode(); +#endif +} diff --git a/arch/mips/fw/arc/memory.c b/arch/mips/fw/arc/memory.c new file mode 100644 index 000000000..66188739f --- /dev/null +++ b/arch/mips/fw/arc/memory.c @@ -0,0 +1,192 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * memory.c: PROM library functions for acquiring/using memory descriptors + * given to us from the ARCS firmware. + * + * Copyright (C) 1996 by David S. Miller + * Copyright (C) 1999, 2000, 2001 by Ralf Baechle + * Copyright (C) 1999, 2000 by Silicon Graphics, Inc. + * + * PROM library functions for acquiring/using memory descriptors given to us + * from the ARCS firmware. This is only used when CONFIG_ARC_MEMORY is set + * because on some machines like SGI IP27 the ARC memory configuration data + * completely bogus and alternate easier to use mechanisms are available. + */ +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/types.h> +#include <linux/sched.h> +#include <linux/mm.h> +#include <linux/memblock.h> +#include <linux/swap.h> + +#include <asm/sgialib.h> +#include <asm/page.h> +#include <asm/bootinfo.h> + +#undef DEBUG + +#define MAX_PROM_MEM 5 +static phys_addr_t prom_mem_base[MAX_PROM_MEM] __initdata; +static phys_addr_t prom_mem_size[MAX_PROM_MEM] __initdata; +static unsigned int nr_prom_mem __initdata; + +/* + * For ARC firmware memory functions the unit of measuring memory is always + * a 4k page of memory + */ +#define ARC_PAGE_SHIFT 12 + +struct linux_mdesc * __init ArcGetMemoryDescriptor(struct linux_mdesc *Current) +{ + return (struct linux_mdesc *) ARC_CALL1(get_mdesc, Current); +} + +#ifdef DEBUG /* convenient for debugging */ +static char *arcs_mtypes[8] = { + "Exception Block", + "ARCS Romvec Page", + "Free/Contig RAM", + "Generic Free RAM", + "Bad Memory", + "Standalone Program Pages", + "ARCS Temp Storage Area", + "ARCS Permanent Storage Area" +}; + +static char *arc_mtypes[8] = { + "Exception Block", + "SystemParameterBlock", + "FreeMemory", + "Bad Memory", + "LoadedProgram", + "FirmwareTemporary", + "FirmwarePermanent", + "FreeContiguous" +}; +#define mtypes(a) (prom_flags & PROM_FLAG_ARCS) ? arcs_mtypes[a.arcs] \ + : arc_mtypes[a.arc] +#endif + +enum { + mem_free, mem_prom_used, mem_reserved +}; + +static inline int memtype_classify_arcs(union linux_memtypes type) +{ + switch (type.arcs) { + case arcs_fcontig: + case arcs_free: + return mem_free; + case arcs_atmp: + return mem_prom_used; + case arcs_eblock: + case arcs_rvpage: + case arcs_bmem: + case arcs_prog: + case arcs_aperm: + return mem_reserved; + default: + BUG(); + } + while(1); /* Nuke warning. */ +} + +static inline int memtype_classify_arc(union linux_memtypes type) +{ + switch (type.arc) { + case arc_free: + case arc_fcontig: + return mem_free; + case arc_atmp: + return mem_prom_used; + case arc_eblock: + case arc_rvpage: + case arc_bmem: + case arc_prog: + case arc_aperm: + return mem_reserved; + default: + BUG(); + } + while(1); /* Nuke warning. */ +} + +static int __init prom_memtype_classify(union linux_memtypes type) +{ + if (prom_flags & PROM_FLAG_ARCS) /* SGI is ``different'' ... */ + return memtype_classify_arcs(type); + + return memtype_classify_arc(type); +} + +void __weak __init prom_meminit(void) +{ + struct linux_mdesc *p; + +#ifdef DEBUG + int i = 0; + + printk("ARCS MEMORY DESCRIPTOR dump:\n"); + p = ArcGetMemoryDescriptor(PROM_NULL_MDESC); + while(p) { + printk("[%d,%p]: base<%08lx> pages<%08lx> type<%s>\n", + i, p, p->base, p->pages, mtypes(p->type)); + p = ArcGetMemoryDescriptor(p); + i++; + } +#endif + + nr_prom_mem = 0; + p = PROM_NULL_MDESC; + while ((p = ArcGetMemoryDescriptor(p))) { + unsigned long base, size; + long type; + + base = p->base << ARC_PAGE_SHIFT; + size = p->pages << ARC_PAGE_SHIFT; + type = prom_memtype_classify(p->type); + + /* ignore mirrored RAM on IP28/IP30 */ + if (base < PHYS_OFFSET) + continue; + + memblock_add(base, size); + + if (type == mem_reserved) + memblock_reserve(base, size); + + if (type == mem_prom_used) { + memblock_reserve(base, size); + if (nr_prom_mem >= 5) { + pr_err("Too many ROM DATA regions"); + continue; + } + prom_mem_base[nr_prom_mem] = base; + prom_mem_size[nr_prom_mem] = size; + nr_prom_mem++; + } + } +} + +void __weak __init prom_cleanup(void) +{ +} + +void __init prom_free_prom_memory(void) +{ + int i; + + if (prom_flags & PROM_FLAG_DONT_FREE_TEMP) + return; + + for (i = 0; i < nr_prom_mem; i++) { + free_init_pages("prom memory", + prom_mem_base[i], prom_mem_base[i] + prom_mem_size[i]); + } + /* + * at this point it isn't safe to call PROM functions + * give platforms a way to do PROM cleanups + */ + prom_cleanup(); +} diff --git a/arch/mips/fw/arc/misc.c b/arch/mips/fw/arc/misc.c new file mode 100644 index 000000000..d5b2d5901 --- /dev/null +++ b/arch/mips/fw/arc/misc.c @@ -0,0 +1,36 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * Miscellaneous ARCS PROM routines. + * + * Copyright (C) 1996 David S. Miller (davem@davemloft.net) + * Copyright (C) 1999 Ralf Baechle (ralf@gnu.org) + * Copyright (C) 1999 Silicon Graphics, Inc. + */ +#include <linux/compiler.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/irqflags.h> + +#include <asm/bcache.h> + +#include <asm/fw/arc/types.h> +#include <asm/sgialib.h> +#include <asm/bootinfo.h> + +VOID __noreturn +ArcEnterInteractiveMode(VOID) +{ + bc_disable(); + local_irq_disable(); + ARC_CALL0(imode); + + unreachable(); +} + +DISPLAY_STATUS * __init ArcGetDisplayStatus(ULONG FileID) +{ + return (DISPLAY_STATUS *) ARC_CALL1(GetDisplayStatus, FileID); +} diff --git a/arch/mips/fw/arc/promlib.c b/arch/mips/fw/arc/promlib.c new file mode 100644 index 000000000..5e9e840a9 --- /dev/null +++ b/arch/mips/fw/arc/promlib.c @@ -0,0 +1,61 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * Copyright (C) 1996 David S. Miller (dm@sgi.com) + * Compatibility with board caches, Ulf Carlsson + */ +#include <linux/kernel.h> +#include <asm/sgialib.h> +#include <asm/bcache.h> +#include <asm/setup.h> + +#if defined(CONFIG_64BIT) && defined(CONFIG_FW_ARC32) +/* + * For 64bit kernels working with a 32bit ARC PROM pointer arguments + * for ARC calls need to reside in CKEG0/1. But as soon as the kernel + * switches to it's first kernel thread stack is set to an address in + * XKPHYS, so anything on stack can't be used anymore. This is solved + * by using a * static declartion variables are put into BSS, which is + * linked to a CKSEG0 address. Since this is only used on UP platforms + * there is not spinlock needed + */ +#define O32_STATIC static +#else +#define O32_STATIC +#endif + +/* + * IP22 boardcache is not compatible with board caches. Thus we disable it + * during romvec action. Since r4xx0.c is always compiled and linked with your + * kernel, this shouldn't cause any harm regardless what MIPS processor you + * have. + * + * The ARC write and read functions seem to interfere with the serial lines + * in some way. You should be careful with them. + */ + +void prom_putchar(char c) +{ + O32_STATIC ULONG cnt; + O32_STATIC CHAR it; + + it = c; + + bc_disable(); + ArcWrite(1, &it, 1, &cnt); + bc_enable(); +} + +char prom_getchar(void) +{ + O32_STATIC ULONG cnt; + O32_STATIC CHAR c; + + bc_disable(); + ArcRead(0, &c, 1, &cnt); + bc_enable(); + + return c; +} |