mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
414 lines
9.0 KiB
414 lines
9.0 KiB
// SPDX-License-Identifier: GPL-2.0 |
|
/* |
|
* linux/arch/sparc/kernel/setup.c |
|
* |
|
* Copyright (C) 1995 David S. Miller ([email protected]) |
|
* Copyright (C) 2000 Anton Blanchard ([email protected]) |
|
*/ |
|
|
|
#include <linux/errno.h> |
|
#include <linux/sched.h> |
|
#include <linux/kernel.h> |
|
#include <linux/mm.h> |
|
#include <linux/stddef.h> |
|
#include <linux/unistd.h> |
|
#include <linux/ptrace.h> |
|
#include <linux/slab.h> |
|
#include <linux/initrd.h> |
|
#include <asm/smp.h> |
|
#include <linux/user.h> |
|
#include <linux/screen_info.h> |
|
#include <linux/delay.h> |
|
#include <linux/fs.h> |
|
#include <linux/seq_file.h> |
|
#include <linux/syscalls.h> |
|
#include <linux/kdev_t.h> |
|
#include <linux/major.h> |
|
#include <linux/string.h> |
|
#include <linux/init.h> |
|
#include <linux/interrupt.h> |
|
#include <linux/console.h> |
|
#include <linux/spinlock.h> |
|
#include <linux/root_dev.h> |
|
#include <linux/cpu.h> |
|
#include <linux/kdebug.h> |
|
#include <linux/export.h> |
|
#include <linux/start_kernel.h> |
|
#include <uapi/linux/mount.h> |
|
|
|
#include <asm/io.h> |
|
#include <asm/processor.h> |
|
#include <asm/oplib.h> |
|
#include <asm/page.h> |
|
#include <asm/traps.h> |
|
#include <asm/vaddrs.h> |
|
#include <asm/mbus.h> |
|
#include <asm/idprom.h> |
|
#include <asm/cpudata.h> |
|
#include <asm/setup.h> |
|
#include <asm/cacheflush.h> |
|
#include <asm/sections.h> |
|
|
|
#include "kernel.h" |
|
|
|
struct screen_info screen_info = { |
|
0, 0, /* orig-x, orig-y */ |
|
0, /* unused */ |
|
0, /* orig-video-page */ |
|
0, /* orig-video-mode */ |
|
128, /* orig-video-cols */ |
|
0,0,0, /* ega_ax, ega_bx, ega_cx */ |
|
54, /* orig-video-lines */ |
|
0, /* orig-video-isVGA */ |
|
16 /* orig-video-points */ |
|
}; |
|
|
|
/* Typing sync at the prom prompt calls the function pointed to by |
|
* romvec->pv_synchook which I set to the following function. |
|
* This should sync all filesystems and return, for now it just |
|
* prints out pretty messages and returns. |
|
*/ |
|
|
|
/* Pretty sick eh? */ |
|
static void prom_sync_me(void) |
|
{ |
|
unsigned long prom_tbr, flags; |
|
|
|
/* XXX Badly broken. FIX! - Anton */ |
|
local_irq_save(flags); |
|
__asm__ __volatile__("rd %%tbr, %0\n\t" : "=r" (prom_tbr)); |
|
__asm__ __volatile__("wr %0, 0x0, %%tbr\n\t" |
|
"nop\n\t" |
|
"nop\n\t" |
|
"nop\n\t" : : "r" (&trapbase)); |
|
|
|
prom_printf("PROM SYNC COMMAND...\n"); |
|
show_free_areas(0, NULL); |
|
if (!is_idle_task(current)) { |
|
local_irq_enable(); |
|
ksys_sync(); |
|
local_irq_disable(); |
|
} |
|
prom_printf("Returning to prom\n"); |
|
|
|
__asm__ __volatile__("wr %0, 0x0, %%tbr\n\t" |
|
"nop\n\t" |
|
"nop\n\t" |
|
"nop\n\t" : : "r" (prom_tbr)); |
|
local_irq_restore(flags); |
|
} |
|
|
|
static unsigned int boot_flags __initdata = 0; |
|
#define BOOTME_DEBUG 0x1 |
|
|
|
/* Exported for mm/init.c:paging_init. */ |
|
unsigned long cmdline_memory_size __initdata = 0; |
|
|
|
/* which CPU booted us (0xff = not set) */ |
|
unsigned char boot_cpu_id = 0xff; /* 0xff will make it into DATA section... */ |
|
|
|
static void |
|
prom_console_write(struct console *con, const char *s, unsigned int n) |
|
{ |
|
prom_write(s, n); |
|
} |
|
|
|
static struct console prom_early_console = { |
|
.name = "earlyprom", |
|
.write = prom_console_write, |
|
.flags = CON_PRINTBUFFER | CON_BOOT, |
|
.index = -1, |
|
}; |
|
|
|
/* |
|
* Process kernel command line switches that are specific to the |
|
* SPARC or that require special low-level processing. |
|
*/ |
|
static void __init process_switch(char c) |
|
{ |
|
switch (c) { |
|
case 'd': |
|
boot_flags |= BOOTME_DEBUG; |
|
break; |
|
case 's': |
|
break; |
|
case 'h': |
|
prom_printf("boot_flags_init: Halt!\n"); |
|
prom_halt(); |
|
break; |
|
case 'p': |
|
prom_early_console.flags &= ~CON_BOOT; |
|
break; |
|
default: |
|
printk("Unknown boot switch (-%c)\n", c); |
|
break; |
|
} |
|
} |
|
|
|
static void __init boot_flags_init(char *commands) |
|
{ |
|
while (*commands) { |
|
/* Move to the start of the next "argument". */ |
|
while (*commands == ' ') |
|
commands++; |
|
|
|
/* Process any command switches, otherwise skip it. */ |
|
if (*commands == '\0') |
|
break; |
|
if (*commands == '-') { |
|
commands++; |
|
while (*commands && *commands != ' ') |
|
process_switch(*commands++); |
|
continue; |
|
} |
|
if (!strncmp(commands, "mem=", 4)) { |
|
/* |
|
* "mem=XXX[kKmM] overrides the PROM-reported |
|
* memory size. |
|
*/ |
|
cmdline_memory_size = simple_strtoul(commands + 4, |
|
&commands, 0); |
|
if (*commands == 'K' || *commands == 'k') { |
|
cmdline_memory_size <<= 10; |
|
commands++; |
|
} else if (*commands=='M' || *commands=='m') { |
|
cmdline_memory_size <<= 20; |
|
commands++; |
|
} |
|
} |
|
while (*commands && *commands != ' ') |
|
commands++; |
|
} |
|
} |
|
|
|
extern unsigned short root_flags; |
|
extern unsigned short root_dev; |
|
extern unsigned short ram_flags; |
|
#define RAMDISK_IMAGE_START_MASK 0x07FF |
|
#define RAMDISK_PROMPT_FLAG 0x8000 |
|
#define RAMDISK_LOAD_FLAG 0x4000 |
|
|
|
extern int root_mountflags; |
|
|
|
char reboot_command[COMMAND_LINE_SIZE]; |
|
|
|
struct cpuid_patch_entry { |
|
unsigned int addr; |
|
unsigned int sun4d[3]; |
|
unsigned int leon[3]; |
|
}; |
|
extern struct cpuid_patch_entry __cpuid_patch, __cpuid_patch_end; |
|
|
|
static void __init per_cpu_patch(void) |
|
{ |
|
struct cpuid_patch_entry *p; |
|
|
|
if (sparc_cpu_model == sun4m) { |
|
/* Nothing to do, this is what the unpatched code |
|
* targets. |
|
*/ |
|
return; |
|
} |
|
|
|
p = &__cpuid_patch; |
|
while (p < &__cpuid_patch_end) { |
|
unsigned long addr = p->addr; |
|
unsigned int *insns; |
|
|
|
switch (sparc_cpu_model) { |
|
case sun4d: |
|
insns = &p->sun4d[0]; |
|
break; |
|
|
|
case sparc_leon: |
|
insns = &p->leon[0]; |
|
break; |
|
default: |
|
prom_printf("Unknown cpu type, halting.\n"); |
|
prom_halt(); |
|
} |
|
*(unsigned int *) (addr + 0) = insns[0]; |
|
flushi(addr + 0); |
|
*(unsigned int *) (addr + 4) = insns[1]; |
|
flushi(addr + 4); |
|
*(unsigned int *) (addr + 8) = insns[2]; |
|
flushi(addr + 8); |
|
|
|
p++; |
|
} |
|
} |
|
|
|
struct leon_1insn_patch_entry { |
|
unsigned int addr; |
|
unsigned int insn; |
|
}; |
|
|
|
enum sparc_cpu sparc_cpu_model; |
|
EXPORT_SYMBOL(sparc_cpu_model); |
|
|
|
static __init void leon_patch(void) |
|
{ |
|
struct leon_1insn_patch_entry *start = (void *)__leon_1insn_patch; |
|
struct leon_1insn_patch_entry *end = (void *)__leon_1insn_patch_end; |
|
|
|
/* Default instruction is leon - no patching */ |
|
if (sparc_cpu_model == sparc_leon) |
|
return; |
|
|
|
while (start < end) { |
|
unsigned long addr = start->addr; |
|
|
|
*(unsigned int *)(addr) = start->insn; |
|
flushi(addr); |
|
|
|
start++; |
|
} |
|
} |
|
|
|
struct tt_entry *sparc_ttable; |
|
|
|
/* Called from head_32.S - before we have setup anything |
|
* in the kernel. Be very careful with what you do here. |
|
*/ |
|
void __init sparc32_start_kernel(struct linux_romvec *rp) |
|
{ |
|
prom_init(rp); |
|
|
|
/* Set sparc_cpu_model */ |
|
sparc_cpu_model = sun_unknown; |
|
if (!strcmp(&cputypval[0], "sun4m")) |
|
sparc_cpu_model = sun4m; |
|
if (!strcmp(&cputypval[0], "sun4s")) |
|
sparc_cpu_model = sun4m; /* CP-1200 with PROM 2.30 -E */ |
|
if (!strcmp(&cputypval[0], "sun4d")) |
|
sparc_cpu_model = sun4d; |
|
if (!strcmp(&cputypval[0], "sun4e")) |
|
sparc_cpu_model = sun4e; |
|
if (!strcmp(&cputypval[0], "sun4u")) |
|
sparc_cpu_model = sun4u; |
|
if (!strncmp(&cputypval[0], "leon" , 4)) |
|
sparc_cpu_model = sparc_leon; |
|
|
|
leon_patch(); |
|
start_kernel(); |
|
} |
|
|
|
void __init setup_arch(char **cmdline_p) |
|
{ |
|
int i; |
|
unsigned long highest_paddr; |
|
|
|
sparc_ttable = &trapbase; |
|
|
|
/* Initialize PROM console and command line. */ |
|
*cmdline_p = prom_getbootargs(); |
|
strlcpy(boot_command_line, *cmdline_p, COMMAND_LINE_SIZE); |
|
parse_early_param(); |
|
|
|
boot_flags_init(*cmdline_p); |
|
|
|
register_console(&prom_early_console); |
|
|
|
switch(sparc_cpu_model) { |
|
case sun4m: |
|
pr_info("ARCH: SUN4M\n"); |
|
break; |
|
case sun4d: |
|
pr_info("ARCH: SUN4D\n"); |
|
break; |
|
case sun4e: |
|
pr_info("ARCH: SUN4E\n"); |
|
break; |
|
case sun4u: |
|
pr_info("ARCH: SUN4U\n"); |
|
break; |
|
case sparc_leon: |
|
pr_info("ARCH: LEON\n"); |
|
break; |
|
default: |
|
pr_info("ARCH: UNKNOWN!\n"); |
|
break; |
|
} |
|
|
|
idprom_init(); |
|
load_mmu(); |
|
|
|
phys_base = 0xffffffffUL; |
|
highest_paddr = 0UL; |
|
for (i = 0; sp_banks[i].num_bytes != 0; i++) { |
|
unsigned long top; |
|
|
|
if (sp_banks[i].base_addr < phys_base) |
|
phys_base = sp_banks[i].base_addr; |
|
top = sp_banks[i].base_addr + |
|
sp_banks[i].num_bytes; |
|
if (highest_paddr < top) |
|
highest_paddr = top; |
|
} |
|
pfn_base = phys_base >> PAGE_SHIFT; |
|
|
|
if (!root_flags) |
|
root_mountflags &= ~MS_RDONLY; |
|
ROOT_DEV = old_decode_dev(root_dev); |
|
#ifdef CONFIG_BLK_DEV_RAM |
|
rd_image_start = ram_flags & RAMDISK_IMAGE_START_MASK; |
|
#endif |
|
|
|
prom_setsync(prom_sync_me); |
|
|
|
if((boot_flags & BOOTME_DEBUG) && (linux_dbvec != NULL) && |
|
((*(short *)linux_dbvec) != -1)) { |
|
printk("Booted under KADB. Syncing trap table.\n"); |
|
(*(linux_dbvec->teach_debugger))(); |
|
} |
|
|
|
/* Run-time patch instructions to match the cpu model */ |
|
per_cpu_patch(); |
|
|
|
paging_init(); |
|
|
|
smp_setup_cpu_possible_map(); |
|
} |
|
|
|
extern int stop_a_enabled; |
|
|
|
void sun_do_break(void) |
|
{ |
|
if (!stop_a_enabled) |
|
return; |
|
|
|
printk("\n"); |
|
flush_user_windows(); |
|
|
|
prom_cmdline(); |
|
} |
|
EXPORT_SYMBOL(sun_do_break); |
|
|
|
int stop_a_enabled = 1; |
|
|
|
static int __init topology_init(void) |
|
{ |
|
int i, ncpus, err; |
|
|
|
/* Count the number of physically present processors in |
|
* the machine, even on uniprocessor, so that /proc/cpuinfo |
|
* output is consistent with 2.4.x |
|
*/ |
|
ncpus = 0; |
|
while (!cpu_find_by_instance(ncpus, NULL, NULL)) |
|
ncpus++; |
|
ncpus_probed = ncpus; |
|
|
|
err = 0; |
|
for_each_online_cpu(i) { |
|
struct cpu *p = kzalloc(sizeof(*p), GFP_KERNEL); |
|
if (!p) |
|
err = -ENOMEM; |
|
else |
|
register_cpu(p, i); |
|
} |
|
|
|
return err; |
|
} |
|
|
|
subsys_initcall(topology_init);
|
|
|