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OpenCloudOS-Kernel/arch/ppc/kernel/setup.c

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/*
* Common prep/pmac/chrp boot and setup code.
*/
#include <linux/config.h>
#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/tty.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/amigappc.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/pmac_feature.h>
#include <asm/sections.h>
#include <asm/nvram.h>
#include <asm/xmon.h>
#include <asm/ocp.h>
#define USES_PPC_SYS (defined(CONFIG_85xx) || defined(CONFIG_83xx) || \
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 bootx_init(unsigned long r4, unsigned long phys);
extern void identify_cpu(unsigned long offset, unsigned long cpu);
extern void do_cpu_ftr_fixups(unsigned long offset);
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 long DMA_MODE_READ, DMA_MODE_WRITE;
#ifdef CONFIG_PPC_MULTIPLATFORM
int _machine = 0;
extern void prep_init(unsigned long r3, unsigned long r4,
unsigned long r5, unsigned long r6, unsigned long r7);
extern void pmac_init(unsigned long r3, unsigned long r4,
unsigned long r5, unsigned long r6, unsigned long r7);
extern void chrp_init(unsigned long r3, unsigned long r4,
unsigned long r5, unsigned long r6, unsigned long r7);
#endif /* CONFIG_PPC_MULTIPLATFORM */
#ifdef CONFIG_MAGIC_SYSRQ
unsigned long SYSRQ_KEY = 0x54;
#endif /* CONFIG_MAGIC_SYSRQ */
#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);
}
void machine_power_off(void)
{
#ifdef CONFIG_NVRAM
nvram_sync();
#endif
ppc_md.power_off();
}
void machine_halt(void)
{
#ifdef CONFIG_NVRAM
nvram_sync();
#endif
ppc_md.halt();
}
void (*pm_power_off)(void) = machine_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 (i = 0; i < NR_CPUS; ++i)
if (cpu_online(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[i]->pvr_mask)
seq_printf(m, "%s", cur_cpu_spec[i]->cpu_name);
else
seq_printf(m, "unknown (%08x)", pvr);
#ifdef CONFIG_ALTIVEC
if (cur_cpu_spec[i]->cpu_features & CPU_FTR_ALTIVEC)
seq_printf(m, ", altivec supported");
#endif
seq_printf(m, "\n");
#ifdef CONFIG_TAU
if (cur_cpu_spec[i]->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();
/* 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.
*/
identify_cpu(offset, 0);
do_cpu_ftr_fixups(offset);
#if defined(CONFIG_PPC_MULTIPLATFORM)
reloc_got2(offset);
/* If we came here from BootX, clear the screen,
* set up some pointers and return. */
if ((r3 == 0x426f6f58) && (r5 == 0))
bootx_init(r4, phys);
/*
* don't do anything on prep
* for now, don't use bootinfo because it breaks yaboot 0.5
* and assume that if we didn't find a magic number, we have OF
*/
else if (*(unsigned long *)(0) != 0xdeadc0de)
phys = prom_init(r3, r4, (prom_entry)r5);
reloc_got2(-offset);
#endif
return phys;
}
#ifdef CONFIG_PPC_OF
/*
* Assume here that all clock rates are the same in a
* smp system. -- Cort
*/
int __openfirmware
of_show_percpuinfo(struct seq_file *m, int i)
{
struct device_node *cpu_node;
u32 *fp;
int s;
cpu_node = find_type_devices("cpu");
if (!cpu_node)
return 0;
for (s = 0; s < i && cpu_node->next; s++)
cpu_node = cpu_node->next;
fp = (u32 *)get_property(cpu_node, "clock-frequency", NULL);
if (fp)
seq_printf(m, "clock\t\t: %dMHz\n", *fp / 1000000);
return 0;
}
void __init
intuit_machine_type(void)
{
char *model;
struct device_node *root;
/* ask the OF info if we're a chrp or pmac */
root = find_path_device("/");
if (root != 0) {
/* assume pmac unless proven to be chrp -- Cort */
_machine = _MACH_Pmac;
model = get_property(root, "device_type", NULL);
if (model && !strncmp("chrp", model, 4))
_machine = _MACH_chrp;
else {
model = get_property(root, "model", NULL);
if (model && !strncmp(model, "IBM", 3))
_machine = _MACH_chrp;
}
}
}
#endif
#ifdef CONFIG_PPC_MULTIPLATFORM
/*
* The PPC_MULTIPLATFORM 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());
/* if we didn't get any bootinfo telling us what we are... */
if (_machine == 0) {
/* prep boot loader tells us if we're prep or not */
if ( *(unsigned long *)(KERNELBASE) == (0xdeadc0de) )
_machine = _MACH_prep;
}
/* not much more to do here, if prep */
if (_machine == _MACH_prep) {
prep_init(r3, r4, r5, r6, r7);
return;
}
/* prom_init has already been called from __start */
if (boot_infos)
relocate_nodes();
/* If we aren't PReP, we can find out if we're Pmac
* or CHRP with this. */
if (_machine == 0)
intuit_machine_type();
/* finish_device_tree may need _machine defined. */
finish_device_tree();
/*
* If we were booted via quik, r3 points to the physical
* address of the command-line parameters.
* If we were booted from an xcoff image (i.e. netbooted or
* booted from floppy), we get the command line from the
* bootargs property of the /chosen node.
* If an initial ramdisk is present, r3 and r4
* are used for initrd_start and initrd_size,
* otherwise they contain 0xdeadbeef.
*/
if (r3 >= 0x4000 && r3 < 0x800000 && r4 == 0) {
strlcpy(cmd_line, (char *)r3 + KERNELBASE,
sizeof(cmd_line));
} else if (boot_infos != 0) {
/* booted by BootX - check for ramdisk */
if (boot_infos->kernelParamsOffset != 0)
strlcpy(cmd_line, (char *) boot_infos
+ boot_infos->kernelParamsOffset,
sizeof(cmd_line));
#ifdef CONFIG_BLK_DEV_INITRD
if (boot_infos->ramDisk) {
initrd_start = (unsigned long) boot_infos
+ boot_infos->ramDisk;
initrd_end = initrd_start + boot_infos->ramDiskSize;
initrd_below_start_ok = 1;
}
#endif
} else {
struct device_node *chosen;
char *p;
#ifdef CONFIG_BLK_DEV_INITRD
if (r3 && r4 && r4 != 0xdeadbeef) {
if (r3 < KERNELBASE)
r3 += KERNELBASE;
initrd_start = r3;
initrd_end = r3 + r4;
ROOT_DEV = Root_RAM0;
initrd_below_start_ok = 1;
}
#endif
chosen = find_devices("chosen");
if (chosen != NULL) {
p = get_property(chosen, "bootargs", NULL);
if (p && *p) {
strlcpy(cmd_line, p, sizeof(cmd_line));
}
}
}
#ifdef CONFIG_ADB
if (strstr(cmd_line, "adb_sync")) {
extern int __adb_probe_sync;
__adb_probe_sync = 1;
}
#endif /* CONFIG_ADB */
switch (_machine) {
case _MACH_Pmac:
pmac_init(r3, r4, r5, r6, r7);
break;
case _MACH_chrp:
chrp_init(r3, r4, r5, r6, r7);
break;
}
}
#ifdef CONFIG_SERIAL_CORE_CONSOLE
extern char *of_stdout_device;
static int __init set_preferred_console(void)
{
struct device_node *prom_stdout;
char *name;
int offset = 0;
if (of_stdout_device == NULL)
return -ENODEV;
/* The user has requested a console so this is already set up. */
if (strstr(saved_command_line, "console="))
return -EBUSY;
prom_stdout = find_path_device(of_stdout_device);
if (!prom_stdout)
return -ENODEV;
name = (char *)get_property(prom_stdout, "name", NULL);
if (!name)
return -ENODEV;
if (strcmp(name, "serial") == 0) {
int i;
u32 *reg = (u32 *)get_property(prom_stdout, "reg", &i);
if (i > 8) {
switch (reg[1]) {
case 0x3f8:
offset = 0;
break;
case 0x2f8:
offset = 1;
break;
case 0x898:
offset = 2;
break;
case 0x890:
offset = 3;
break;
default:
/* We dont recognise the serial port */
return -ENODEV;
}
}
} else if (strcmp(name, "ch-a") == 0)
offset = 0;
else if (strcmp(name, "ch-b") == 0)
offset = 1;
else
return -ENODEV;
return add_preferred_console("ttyS", offset, NULL);
}
console_initcall(set_preferred_console);
#endif /* CONFIG_SERIAL_CORE_CONSOLE */
#endif /* CONFIG_PPC_MULTIPLATFORM */
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 */
#ifdef CONFIG_PPC_MULTIPLATFORM
case BI_MACHTYPE:
_machine = data[0];
break;
#endif
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
#ifdef CONFIG_POWER4
ppc_md.power_save = power4_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 (i = 0; i < NR_CPUS; i++)
if (cpu_possible(i))
register_cpu(&cpu_devices[i], i, NULL);
/* 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;
#ifdef CONFIG_PPC_MULTIPLATFORM
/* This could be called "early setup arch", it must be done
* now because xmon need it
*/
if (_machine == _MACH_Pmac)
pmac_feature_init(); /* New cool way */
#endif
#ifdef CONFIG_XMON
xmon_map_scc();
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_SPLIT_ID_CACHE)) {
dcache_bsize = cur_cpu_spec[0]->dcache_bsize;
icache_bsize = cur_cpu_spec[0]->icache_bsize;
ucache_bsize = 0;
} else
ucache_bsize = dcache_bsize = icache_bsize
= cur_cpu_spec[0]->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(saved_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();
/* this is for modules since _machine can be a define -- Cort */
ppc_md.ppc_machine = _machine;
}
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