/*
* Common prep boot and setup code.
*/
#include <linux/module.h>
#include <linux/string.h>
#include <linux/sched.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/reboot.h>
#include <linux/delay.h>
#include <linux/initrd.h>
#include <linux/ide.h>
#include <linux/screen_info.h>
#include <linux/bootmem.h>
#include <linux/seq_file.h>
#include <linux/root_dev.h>
#include <linux/cpu.h>
#include <linux/console.h>
#include <asm/residual.h>
#include <asm/io.h>
#include <asm/prom.h>
#include <asm/processor.h>
#include <asm/pgtable.h>
#include <asm/bootinfo.h>
#include <asm/setup.h>
#include <asm/smp.h>
#include <asm/elf.h>
#include <asm/cputable.h>
#include <asm/bootx.h>
#include <asm/btext.h>
#include <asm/machdep.h>
#include <asm/uaccess.h>
#include <asm/system.h>
#include <asm/sections.h>
#include <asm/nvram.h>
#include <asm/xmon.h>
#include <asm/ocp.h>
#define USES_PPC_SYS (defined(CONFIG_MPC10X_BRIDGE) || defined(CONFIG_8260) || \
defined(CONFIG_PPC_MPC52xx))
#if USES_PPC_SYS
#include <asm/ppc_sys.h>
#endif
#if defined CONFIG_KGDB
#include <asm/kgdb.h>
#endif
extern void platform_init(unsigned long r3, unsigned long r4,
unsigned long r5, unsigned long r6, unsigned long r7);
extern void reloc_got2(unsigned long offset);
extern void ppc6xx_idle(void);
extern void power4_idle(void);
extern boot_infos_t *boot_infos;
struct ide_machdep_calls ppc_ide_md;
/* Used with the BI_MEMSIZE bootinfo parameter to store the memory
size value reported by the boot loader. */
unsigned long boot_mem_size;
unsigned long ISA_DMA_THRESHOLD;
unsigned int DMA_MODE_READ;
unsigned int DMA_MODE_WRITE;
#ifdef CONFIG_PPC_PREP
extern void prep_init(unsigned long r3, unsigned long r4,
unsigned long r5, unsigned long r6, unsigned long r7);
dev_t boot_dev;
#endif /* CONFIG_PPC_PREP */
int have_of;
EXPORT_SYMBOL(have_of);
#ifdef __DO_IRQ_CANON
int ppc_do_canonicalize_irqs;
EXPORT_SYMBOL(ppc_do_canonicalize_irqs);
#endif
#ifdef CONFIG_VGA_CONSOLE
unsigned long vgacon_remap_base;
#endif
struct machdep_calls ppc_md;
/*
* These are used in binfmt_elf.c to put aux entries on the stack
* for each elf executable being started.
*/
int dcache_bsize;
int icache_bsize;
int ucache_bsize;
#if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_FB_VGA16) || \
defined(CONFIG_FB_VGA16_MODULE) || defined(CONFIG_FB_VESA)
struct screen_info screen_info = {
0, 25, /* orig-x, orig-y */
0, /* unused */
0, /* orig-video-page */
0, /* orig-video-mode */
80, /* orig-video-cols */
0,0,0, /* ega_ax, ega_bx, ega_cx */
25, /* orig-video-lines */
1, /* orig-video-isVGA */
16 /* orig-video-points */
};
#endif /* CONFIG_VGA_CONSOLE || CONFIG_FB_VGA16 || CONFIG_FB_VESA */
void machine_restart(char *cmd)
{
#ifdef CONFIG_NVRAM
nvram_sync();
#endif
ppc_md.restart(cmd);
}
static void ppc_generic_power_off(void)
{
ppc_md.power_off();
}
void machine_halt(void)
{
#ifdef CONFIG_NVRAM
nvram_sync();
#endif
ppc_md.halt();
}
void (*pm_power_off)(void) = ppc_generic_power_off;
void machine_power_off(void)
{
#ifdef CONFIG_NVRAM
nvram_sync();
#endif
if (pm_power_off)
pm_power_off();
ppc_generic_power_off();
}
#ifdef CONFIG_TAU
extern u32 cpu_temp(unsigned long cpu);
extern u32 cpu_temp_both(unsigned long cpu);
#endif /* CONFIG_TAU */
int show_cpuinfo(struct seq_file *m, void *v)
{
int i = (int) v - 1;
int err = 0;
unsigned int pvr;
unsigned short maj, min;
unsigned long lpj;
if (i >= NR_CPUS) {
/* Show summary information */
#ifdef CONFIG_SMP
unsigned long bogosum = 0;
for_each_online_cpu(i)
bogosum += cpu_data[i].loops_per_jiffy;
seq_printf(m, "total bogomips\t: %lu.%02lu\n",
bogosum/(500000/HZ), bogosum/(5000/HZ) % 100);
#endif /* CONFIG_SMP */
if (ppc_md.show_cpuinfo != NULL)
err = ppc_md.show_cpuinfo(m);
return err;
}
#ifdef CONFIG_SMP
if (!cpu_online(i))
return 0;
pvr = cpu_data[i].pvr;
lpj = cpu_data[i].loops_per_jiffy;
#else
pvr = mfspr(SPRN_PVR);
lpj = loops_per_jiffy;
#endif
seq_printf(m, "processor\t: %d\n", i);
seq_printf(m, "cpu\t\t: ");
if (cur_cpu_spec->pvr_mask)
seq_printf(m, "%s", cur_cpu_spec->cpu_name);
else
seq_printf(m, "unknown (%08x)", pvr);
#ifdef CONFIG_ALTIVEC
if (cur_cpu_spec->cpu_features & CPU_FTR_ALTIVEC)
seq_printf(m, ", altivec supported");
#endif
seq_printf(m, "\n");
#ifdef CONFIG_TAU
if (cur_cpu_spec->cpu_features & CPU_FTR_TAU) {
#ifdef CONFIG_TAU_AVERAGE
/* more straightforward, but potentially misleading */
seq_printf(m, "temperature \t: %u C (uncalibrated)\n",
cpu_temp(i));
#else
/* show the actual temp sensor range */
u32 temp;
temp = cpu_temp_both(i);
seq_printf(m, "temperature \t: %u-%u C (uncalibrated)\n",
temp & 0xff, temp >> 16);
#endif
}
#endif /* CONFIG_TAU */
if (ppc_md.show_percpuinfo != NULL) {
err = ppc_md.show_percpuinfo(m, i);
if (err)
return err;
}
/* If we are a Freescale core do a simple check so
* we dont have to keep adding cases in the future */
if ((PVR_VER(pvr) & 0x8000) == 0x8000) {
maj = PVR_MAJ(pvr);
min = PVR_MIN(pvr);
} else {
switch (PVR_VER(pvr)) {
case 0x0020: /* 403 family */
maj = PVR_MAJ(pvr) + 1;
min = PVR_MIN(pvr);
break;
case 0x1008: /* 740P/750P ?? */
maj = ((pvr >> 8) & 0xFF) - 1;
min = pvr & 0xFF;
break;
default:
maj = (pvr >> 8) & 0xFF;
min = pvr & 0xFF;
break;
}
}
seq_printf(m, "revision\t: %hd.%hd (pvr %04x %04x)\n",
maj, min, PVR_VER(pvr), PVR_REV(pvr));
seq_printf(m, "bogomips\t: %lu.%02lu\n",
lpj / (500000/HZ), (lpj / (5000/HZ)) % 100);
#if USES_PPC_SYS
if (cur_ppc_sys_spec->ppc_sys_name)
seq_printf(m, "chipset\t\t: %s\n",
cur_ppc_sys_spec->ppc_sys_name);
#endif
#ifdef CONFIG_SMP
seq_printf(m, "\n");
#endif
return 0;
}
static void *c_start(struct seq_file *m, loff_t *pos)
{
int i = *pos;
return i <= NR_CPUS? (void *) (i + 1): NULL;
}
static void *c_next(struct seq_file *m, void *v, loff_t *pos)
{
++*pos;
return c_start(m, pos);
}
static void c_stop(struct seq_file *m, void *v)
{
}
struct seq_operations cpuinfo_op = {
.start =c_start,
.next = c_next,
.stop = c_stop,
.show = show_cpuinfo,
};
/*
* We're called here very early in the boot. We determine the machine
* type and call the appropriate low-level setup functions.
* -- Cort <cort@fsmlabs.com>
*
* Note that the kernel may be running at an address which is different
* from the address that it was linked at, so we must use RELOC/PTRRELOC
* to access static data (including strings). -- paulus
*/
__init
unsigned long
early_init(int r3, int r4, int r5)
{
unsigned long phys;
unsigned long offset = reloc_offset();
struct cpu_spec *spec;
/* Default */
phys = offset + KERNELBASE;
/* First zero the BSS -- use memset, some arches don't have
* caches on yet */
memset_io(PTRRELOC(&__bss_start), 0, _end - __bss_start);
/*
* Identify the CPU type and fix up code sections
* that depend on which cpu we have.
*/
#if defined(CONFIG_440EP) && defined(CONFIG_PPC_FPU)
/* We pass the virtual PVR here for 440EP as 440EP and 440GR have
* identical PVRs and there is no reliable way to check for the FPU
*/
spec = identify_cpu(offset, (mfspr(SPRN_PVR) | 0x8));
#else
spec = identify_cpu(offset, mfspr(SPRN_PVR));
#endif
do_feature_fixups(spec->cpu_features,
PTRRELOC(&__start___ftr_fixup),
PTRRELOC(&__stop___ftr_fixup));
return phys;
}
#ifdef CONFIG_PPC_PREP
/*
* The PPC_PREP version of platform_init...
*/
void __init
platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
unsigned long r6, unsigned long r7)
{
#ifdef CONFIG_BOOTX_TEXT
if (boot_text_mapped) {
btext_clearscreen();
btext_welcome();
}
#endif
parse_bootinfo(find_bootinfo());
prep_init(r3, r4, r5, r6, r7);
}
#endif /* CONFIG_PPC_PREP */
struct bi_record *find_bootinfo(void)
{
struct bi_record *rec;
rec = (struct bi_record *)_ALIGN((ulong)__bss_start+(1<<20)-1,(1<<20));
if ( rec->tag != BI_FIRST ) {
/*
* This 0x10000 offset is a terrible hack but it will go away when
* we have the bootloader handle all the relocation and
* prom calls -- Cort
*/
rec = (struct bi_record *)_ALIGN((ulong)__bss_start+0x10000+(1<<20)-1,(1<<20));
if ( rec->tag != BI_FIRST )
return NULL;
}
return rec;
}
void parse_bootinfo(struct bi_record *rec)
{
if (rec == NULL || rec->tag != BI_FIRST)
return;
while (rec->tag != BI_LAST) {
ulong *data = rec->data;
switch (rec->tag) {
case BI_CMD_LINE:
strlcpy(cmd_line, (void *)data, sizeof(cmd_line));
break;
#ifdef CONFIG_BLK_DEV_INITRD
case BI_INITRD:
initrd_start = data[0] + KERNELBASE;
initrd_end = data[0] + data[1] + KERNELBASE;
break;
#endif /* CONFIG_BLK_DEV_INITRD */
case BI_MEMSIZE:
boot_mem_size = data[0];
break;
}
rec = (struct bi_record *)((ulong)rec + rec->size);
}
}
/*
* Find out what kind of machine we're on and save any data we need
* from the early boot process (devtree is copied on pmac by prom_init()).
* This is called very early on the boot process, after a minimal
* MMU environment has been set up but before MMU_init is called.
*/
void __init
machine_init(unsigned long r3, unsigned long r4, unsigned long r5,
unsigned long r6, unsigned long r7)
{
#ifdef CONFIG_CMDLINE
strlcpy(cmd_line, CONFIG_CMDLINE, sizeof(cmd_line));
#endif /* CONFIG_CMDLINE */
#ifdef CONFIG_6xx
ppc_md.power_save = ppc6xx_idle;
#endif
platform_init(r3, r4, r5, r6, r7);
if (ppc_md.progress)
ppc_md.progress("id mach(): done", 0x200);
}
#ifdef CONFIG_BOOKE_WDT
/* Checks wdt=x and wdt_period=xx command-line option */
int __init early_parse_wdt(char *p)
{
if (p && strncmp(p, "0", 1) != 0)
booke_wdt_enabled = 1;
return 0;
}
early_param("wdt", early_parse_wdt);
int __init early_parse_wdt_period (char *p)
{
if (p)
booke_wdt_period = simple_strtoul(p, NULL, 0);
return 0;
}
early_param("wdt_period", early_parse_wdt_period);
#endif /* CONFIG_BOOKE_WDT */
/* Checks "l2cr=xxxx" command-line option */
int __init ppc_setup_l2cr(char *str)
{
if (cpu_has_feature(CPU_FTR_L2CR)) {
unsigned long val = simple_strtoul(str, NULL, 0);
printk(KERN_INFO "l2cr set to %lx\n", val);
_set_L2CR(0); /* force invalidate by disable cache */
_set_L2CR(val); /* and enable it */
}
return 1;
}
__setup("l2cr=", ppc_setup_l2cr);
#ifdef CONFIG_GENERIC_NVRAM
/* Generic nvram hooks used by drivers/char/gen_nvram.c */
unsigned char nvram_read_byte(int addr)
{
if (ppc_md.nvram_read_val)
return ppc_md.nvram_read_val(addr);
return 0xff;
}
EXPORT_SYMBOL(nvram_read_byte);
void nvram_write_byte(unsigned char val, int addr)
{
if (ppc_md.nvram_write_val)
ppc_md.nvram_write_val(addr, val);
}
EXPORT_SYMBOL(nvram_write_byte);
void nvram_sync(void)
{
if (ppc_md.nvram_sync)
ppc_md.nvram_sync();
}
EXPORT_SYMBOL(nvram_sync);
#endif /* CONFIG_NVRAM */
static struct cpu cpu_devices[NR_CPUS];
int __init ppc_init(void)
{
int i;
/* clear the progress line */
if ( ppc_md.progress ) ppc_md.progress(" ", 0xffff);
/* register CPU devices */
for_each_possible_cpu(i)
register_cpu(&cpu_devices[i], i);
/* call platform init */
if (ppc_md.init != NULL) {
ppc_md.init();
}
return 0;
}
arch_initcall(ppc_init);
/* Warning, IO base is not yet inited */
void __init setup_arch(char **cmdline_p)
{
extern char *klimit;
extern void do_init_bootmem(void);
/* so udelay does something sensible, assume <= 1000 bogomips */
loops_per_jiffy = 500000000 / HZ;
if (ppc_md.init_early)
ppc_md.init_early();
#ifdef CONFIG_XMON
xmon_init(1);
if (strstr(cmd_line, "xmon"))
xmon(NULL);
#endif /* CONFIG_XMON */
if ( ppc_md.progress ) ppc_md.progress("setup_arch: enter", 0x3eab);
#if defined(CONFIG_KGDB)
if (ppc_md.kgdb_map_scc)
ppc_md.kgdb_map_scc();
set_debug_traps();
if (strstr(cmd_line, "gdb")) {
if (ppc_md.progress)
ppc_md.progress("setup_arch: kgdb breakpoint", 0x4000);
printk("kgdb breakpoint activated\n");
breakpoint();
}
#endif
/*
* Set cache line size based on type of cpu as a default.
* Systems with OF can look in the properties on the cpu node(s)
* for a possibly more accurate value.
*/
if (! cpu_has_feature(CPU_FTR_UNIFIED_ID_CACHE)) {
dcache_bsize = cur_cpu_spec->dcache_bsize;
icache_bsize = cur_cpu_spec->icache_bsize;
ucache_bsize = 0;
} else
ucache_bsize = dcache_bsize = icache_bsize
= cur_cpu_spec->dcache_bsize;
/* reboot on panic */
panic_timeout = 180;
init_mm.start_code = PAGE_OFFSET;
init_mm.end_code = (unsigned long) _etext;
init_mm.end_data = (unsigned long) _edata;
init_mm.brk = (unsigned long) klimit;
/* Save unparsed command line copy for /proc/cmdline */
strlcpy(boot_command_line, cmd_line, COMMAND_LINE_SIZE);
*cmdline_p = cmd_line;
parse_early_param();
/* set up the bootmem stuff with available memory */
do_init_bootmem();
if ( ppc_md.progress ) ppc_md.progress("setup_arch: bootmem", 0x3eab);
#ifdef CONFIG_PPC_OCP
/* Initialize OCP device list */
ocp_early_init();
if ( ppc_md.progress ) ppc_md.progress("ocp: exit", 0x3eab);
#endif
#ifdef CONFIG_DUMMY_CONSOLE
conswitchp = &dummy_con;
#endif
ppc_md.setup_arch();
if ( ppc_md.progress ) ppc_md.progress("arch: exit", 0x3eab);
paging_init();
}
