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OpenCloudOS-Kernel/arch/ppc/platforms/pmac_setup.c

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/*
* arch/ppc/platforms/setup.c
*
* PowerPC version
* Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
*
* Adapted for Power Macintosh by Paul Mackerras
* Copyright (C) 1996 Paul Mackerras (paulus@cs.anu.edu.au)
*
* Derived from "arch/alpha/kernel/setup.c"
* Copyright (C) 1995 Linus Torvalds
*
* Maintained by Benjamin Herrenschmidt (benh@kernel.crashing.org)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*
*/
/*
* bootup setup stuff..
*/
#include <linux/config.h>
#include <linux/init.h>
#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/user.h>
#include <linux/a.out.h>
#include <linux/tty.h>
#include <linux/string.h>
#include <linux/delay.h>
#include <linux/ioport.h>
#include <linux/major.h>
#include <linux/initrd.h>
#include <linux/vt_kern.h>
#include <linux/console.h>
#include <linux/ide.h>
#include <linux/pci.h>
#include <linux/adb.h>
#include <linux/cuda.h>
#include <linux/pmu.h>
#include <linux/irq.h>
#include <linux/seq_file.h>
#include <linux/root_dev.h>
#include <linux/bitops.h>
#include <linux/suspend.h>
#include <asm/reg.h>
#include <asm/sections.h>
#include <asm/prom.h>
#include <asm/system.h>
#include <asm/pgtable.h>
#include <asm/io.h>
#include <asm/pci-bridge.h>
#include <asm/ohare.h>
#include <asm/mediabay.h>
#include <asm/machdep.h>
#include <asm/dma.h>
#include <asm/bootx.h>
#include <asm/cputable.h>
#include <asm/btext.h>
#include <asm/pmac_feature.h>
#include <asm/time.h>
#include <asm/of_device.h>
#include <asm/mmu_context.h>
#include "pmac_pic.h"
#include "mem_pieces.h"
#undef SHOW_GATWICK_IRQS
extern long pmac_time_init(void);
extern unsigned long pmac_get_rtc_time(void);
extern int pmac_set_rtc_time(unsigned long nowtime);
extern void pmac_read_rtc_time(void);
extern void pmac_calibrate_decr(void);
extern void pmac_pcibios_fixup(void);
extern void pmac_find_bridges(void);
extern unsigned long pmac_ide_get_base(int index);
extern void pmac_ide_init_hwif_ports(hw_regs_t *hw,
unsigned long data_port, unsigned long ctrl_port, int *irq);
extern void pmac_nvram_update(void);
extern unsigned char pmac_nvram_read_byte(int addr);
extern void pmac_nvram_write_byte(int addr, unsigned char val);
extern int pmac_pci_enable_device_hook(struct pci_dev *dev, int initial);
extern void pmac_pcibios_after_init(void);
extern int of_show_percpuinfo(struct seq_file *m, int i);
struct device_node *memory_node;
unsigned char drive_info;
int ppc_override_l2cr = 0;
int ppc_override_l2cr_value;
int has_l2cache = 0;
static int current_root_goodness = -1;
extern int pmac_newworld;
#define DEFAULT_ROOT_DEVICE Root_SDA1 /* sda1 - slightly silly choice */
extern void zs_kgdb_hook(int tty_num);
static void ohare_init(void);
#ifdef CONFIG_BOOTX_TEXT
static void pmac_progress(char *s, unsigned short hex);
#endif
sys_ctrler_t sys_ctrler = SYS_CTRLER_UNKNOWN;
#ifdef CONFIG_SMP
extern struct smp_ops_t psurge_smp_ops;
extern struct smp_ops_t core99_smp_ops;
#endif /* CONFIG_SMP */
static int __pmac
pmac_show_cpuinfo(struct seq_file *m)
{
struct device_node *np;
char *pp;
int plen;
int mbmodel = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
NULL, PMAC_MB_INFO_MODEL, 0);
unsigned int mbflags = (unsigned int)pmac_call_feature(PMAC_FTR_GET_MB_INFO,
NULL, PMAC_MB_INFO_FLAGS, 0);
char* mbname;
if (pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL, PMAC_MB_INFO_NAME, (int)&mbname) != 0)
mbname = "Unknown";
/* find motherboard type */
seq_printf(m, "machine\t\t: ");
np = find_devices("device-tree");
if (np != NULL) {
pp = (char *) get_property(np, "model", NULL);
if (pp != NULL)
seq_printf(m, "%s\n", pp);
else
seq_printf(m, "PowerMac\n");
pp = (char *) get_property(np, "compatible", &plen);
if (pp != NULL) {
seq_printf(m, "motherboard\t:");
while (plen > 0) {
int l = strlen(pp) + 1;
seq_printf(m, " %s", pp);
plen -= l;
pp += l;
}
seq_printf(m, "\n");
}
} else
seq_printf(m, "PowerMac\n");
/* print parsed model */
seq_printf(m, "detected as\t: %d (%s)\n", mbmodel, mbname);
seq_printf(m, "pmac flags\t: %08x\n", mbflags);
/* find l2 cache info */
np = find_devices("l2-cache");
if (np == 0)
np = find_type_devices("cache");
if (np != 0) {
unsigned int *ic = (unsigned int *)
get_property(np, "i-cache-size", NULL);
unsigned int *dc = (unsigned int *)
get_property(np, "d-cache-size", NULL);
seq_printf(m, "L2 cache\t:");
has_l2cache = 1;
if (get_property(np, "cache-unified", NULL) != 0 && dc) {
seq_printf(m, " %dK unified", *dc / 1024);
} else {
if (ic)
seq_printf(m, " %dK instruction", *ic / 1024);
if (dc)
seq_printf(m, "%s %dK data",
(ic? " +": ""), *dc / 1024);
}
pp = get_property(np, "ram-type", NULL);
if (pp)
seq_printf(m, " %s", pp);
seq_printf(m, "\n");
}
/* find ram info */
np = find_devices("memory");
if (np != 0) {
int n;
struct reg_property *reg = (struct reg_property *)
get_property(np, "reg", &n);
if (reg != 0) {
unsigned long total = 0;
for (n /= sizeof(struct reg_property); n > 0; --n)
total += (reg++)->size;
seq_printf(m, "memory\t\t: %luMB\n", total >> 20);
}
}
/* Checks "l2cr-value" property in the registry */
np = find_devices("cpus");
if (np == 0)
np = find_type_devices("cpu");
if (np != 0) {
unsigned int *l2cr = (unsigned int *)
get_property(np, "l2cr-value", NULL);
if (l2cr != 0) {
seq_printf(m, "l2cr override\t: 0x%x\n", *l2cr);
}
}
/* Indicate newworld/oldworld */
seq_printf(m, "pmac-generation\t: %s\n",
pmac_newworld ? "NewWorld" : "OldWorld");
return 0;
}
static int __openfirmware
pmac_show_percpuinfo(struct seq_file *m, int i)
{
#ifdef CONFIG_CPU_FREQ_PMAC
extern unsigned int pmac_get_one_cpufreq(int i);
unsigned int freq = pmac_get_one_cpufreq(i);
if (freq != 0) {
seq_printf(m, "clock\t\t: %dMHz\n", freq/1000);
return 0;
}
#endif /* CONFIG_CPU_FREQ_PMAC */
return of_show_percpuinfo(m, i);
}
static volatile u32 *sysctrl_regs;
void __init
pmac_setup_arch(void)
{
struct device_node *cpu;
int *fp;
unsigned long pvr;
pvr = PVR_VER(mfspr(SPRN_PVR));
/* Set loops_per_jiffy to a half-way reasonable value,
for use until calibrate_delay gets called. */
cpu = find_type_devices("cpu");
if (cpu != 0) {
fp = (int *) get_property(cpu, "clock-frequency", NULL);
if (fp != 0) {
if (pvr == 4 || pvr >= 8)
/* 604, G3, G4 etc. */
loops_per_jiffy = *fp / HZ;
else
/* 601, 603, etc. */
loops_per_jiffy = *fp / (2*HZ);
} else
loops_per_jiffy = 50000000 / HZ;
}
/* this area has the CPU identification register
and some registers used by smp boards */
sysctrl_regs = (volatile u32 *) ioremap(0xf8000000, 0x1000);
ohare_init();
/* Lookup PCI hosts */
pmac_find_bridges();
/* Checks "l2cr-value" property in the registry */
if (cpu_has_feature(CPU_FTR_L2CR)) {
struct device_node *np = find_devices("cpus");
if (np == 0)
np = find_type_devices("cpu");
if (np != 0) {
unsigned int *l2cr = (unsigned int *)
get_property(np, "l2cr-value", NULL);
if (l2cr != 0) {
ppc_override_l2cr = 1;
ppc_override_l2cr_value = *l2cr;
_set_L2CR(0);
_set_L2CR(ppc_override_l2cr_value);
}
}
}
if (ppc_override_l2cr)
printk(KERN_INFO "L2CR overriden (0x%x), backside cache is %s\n",
ppc_override_l2cr_value, (ppc_override_l2cr_value & 0x80000000)
? "enabled" : "disabled");
#ifdef CONFIG_KGDB
zs_kgdb_hook(0);
#endif
#ifdef CONFIG_ADB_CUDA
find_via_cuda();
#else
if (find_devices("via-cuda")) {
printk("WARNING ! Your machine is Cuda based but your kernel\n");
printk(" wasn't compiled with CONFIG_ADB_CUDA option !\n");
}
#endif
#ifdef CONFIG_ADB_PMU
find_via_pmu();
#else
if (find_devices("via-pmu")) {
printk("WARNING ! Your machine is PMU based but your kernel\n");
printk(" wasn't compiled with CONFIG_ADB_PMU option !\n");
}
#endif
#ifdef CONFIG_NVRAM
pmac_nvram_init();
#endif
#ifdef CONFIG_BLK_DEV_INITRD
if (initrd_start)
ROOT_DEV = Root_RAM0;
else
#endif
ROOT_DEV = DEFAULT_ROOT_DEVICE;
#ifdef CONFIG_SMP
/* Check for Core99 */
if (find_devices("uni-n") || find_devices("u3"))
ppc_md.smp_ops = &core99_smp_ops;
else
ppc_md.smp_ops = &psurge_smp_ops;
#endif /* CONFIG_SMP */
pci_create_OF_bus_map();
}
static void __init ohare_init(void)
{
/*
* Turn on the L2 cache.
* We assume that we have a PSX memory controller iff
* we have an ohare I/O controller.
*/
if (find_devices("ohare") != NULL) {
if (((sysctrl_regs[2] >> 24) & 0xf) >= 3) {
if (sysctrl_regs[4] & 0x10)
sysctrl_regs[4] |= 0x04000020;
else
sysctrl_regs[4] |= 0x04000000;
if(has_l2cache)
printk(KERN_INFO "Level 2 cache enabled\n");
}
}
}
extern char *bootpath;
extern char *bootdevice;
void *boot_host;
int boot_target;
int boot_part;
extern dev_t boot_dev;
#ifdef CONFIG_SCSI
void __init
note_scsi_host(struct device_node *node, void *host)
{
int l;
char *p;
l = strlen(node->full_name);
if (bootpath != NULL && bootdevice != NULL
&& strncmp(node->full_name, bootdevice, l) == 0
&& (bootdevice[l] == '/' || bootdevice[l] == 0)) {
boot_host = host;
/*
* There's a bug in OF 1.0.5. (Why am I not surprised.)
* If you pass a path like scsi/sd@1:0 to canon, it returns
* something like /bandit@F2000000/gc@10/53c94@10000/sd@0,0
* That is, the scsi target number doesn't get preserved.
* So we pick the target number out of bootpath and use that.
*/
p = strstr(bootpath, "/sd@");
if (p != NULL) {
p += 4;
boot_target = simple_strtoul(p, NULL, 10);
p = strchr(p, ':');
if (p != NULL)
boot_part = simple_strtoul(p + 1, NULL, 10);
}
}
}
#endif
#if defined(CONFIG_BLK_DEV_IDE) && defined(CONFIG_BLK_DEV_IDE_PMAC)
static dev_t __init
find_ide_boot(void)
{
char *p;
int n;
dev_t __init pmac_find_ide_boot(char *bootdevice, int n);
if (bootdevice == NULL)
return 0;
p = strrchr(bootdevice, '/');
if (p == NULL)
return 0;
n = p - bootdevice;
return pmac_find_ide_boot(bootdevice, n);
}
#endif /* CONFIG_BLK_DEV_IDE && CONFIG_BLK_DEV_IDE_PMAC */
static void __init
find_boot_device(void)
{
#if defined(CONFIG_BLK_DEV_IDE) && defined(CONFIG_BLK_DEV_IDE_PMAC)
boot_dev = find_ide_boot();
#endif
}
static int initializing = 1;
/* TODO: Merge the suspend-to-ram with the common code !!!
* currently, this is a stub implementation for suspend-to-disk
* only
*/
#ifdef CONFIG_SOFTWARE_SUSPEND
static int pmac_pm_prepare(suspend_state_t state)
{
printk(KERN_DEBUG "%s(%d)\n", __FUNCTION__, state);
return 0;
}
static int pmac_pm_enter(suspend_state_t state)
{
printk(KERN_DEBUG "%s(%d)\n", __FUNCTION__, state);
/* Giveup the lazy FPU & vec so we don't have to back them
* up from the low level code
*/
enable_kernel_fp();
#ifdef CONFIG_ALTIVEC
if (cur_cpu_spec[0]->cpu_features & CPU_FTR_ALTIVEC)
enable_kernel_altivec();
#endif /* CONFIG_ALTIVEC */
return 0;
}
static int pmac_pm_finish(suspend_state_t state)
{
printk(KERN_DEBUG "%s(%d)\n", __FUNCTION__, state);
/* Restore userland MMU context */
set_context(current->active_mm->context, current->active_mm->pgd);
return 0;
}
static struct pm_ops pmac_pm_ops = {
.pm_disk_mode = PM_DISK_SHUTDOWN,
.prepare = pmac_pm_prepare,
.enter = pmac_pm_enter,
.finish = pmac_pm_finish,
};
#endif /* CONFIG_SOFTWARE_SUSPEND */
static int pmac_late_init(void)
{
initializing = 0;
#ifdef CONFIG_SOFTWARE_SUSPEND
pm_set_ops(&pmac_pm_ops);
#endif /* CONFIG_SOFTWARE_SUSPEND */
return 0;
}
late_initcall(pmac_late_init);
/* can't be __init - can be called whenever a disk is first accessed */
void __pmac
note_bootable_part(dev_t dev, int part, int goodness)
{
static int found_boot = 0;
char *p;
if (!initializing)
return;
if ((goodness <= current_root_goodness) &&
ROOT_DEV != DEFAULT_ROOT_DEVICE)
return;
p = strstr(saved_command_line, "root=");
if (p != NULL && (p == saved_command_line || p[-1] == ' '))
return;
if (!found_boot) {
find_boot_device();
found_boot = 1;
}
if (!boot_dev || dev == boot_dev) {
ROOT_DEV = dev + part;
boot_dev = 0;
current_root_goodness = goodness;
}
}
static void __pmac
pmac_restart(char *cmd)
{
#ifdef CONFIG_ADB_CUDA
struct adb_request req;
#endif /* CONFIG_ADB_CUDA */
switch (sys_ctrler) {
#ifdef CONFIG_ADB_CUDA
case SYS_CTRLER_CUDA:
cuda_request(&req, NULL, 2, CUDA_PACKET,
CUDA_RESET_SYSTEM);
for (;;)
cuda_poll();
break;
#endif /* CONFIG_ADB_CUDA */
#ifdef CONFIG_ADB_PMU
case SYS_CTRLER_PMU:
pmu_restart();
break;
#endif /* CONFIG_ADB_PMU */
default: ;
}
}
static void __pmac
pmac_power_off(void)
{
#ifdef CONFIG_ADB_CUDA
struct adb_request req;
#endif /* CONFIG_ADB_CUDA */
switch (sys_ctrler) {
#ifdef CONFIG_ADB_CUDA
case SYS_CTRLER_CUDA:
cuda_request(&req, NULL, 2, CUDA_PACKET,
CUDA_POWERDOWN);
for (;;)
cuda_poll();
break;
#endif /* CONFIG_ADB_CUDA */
#ifdef CONFIG_ADB_PMU
case SYS_CTRLER_PMU:
pmu_shutdown();
break;
#endif /* CONFIG_ADB_PMU */
default: ;
}
}
static void __pmac
pmac_halt(void)
{
pmac_power_off();
}
/*
* Read in a property describing some pieces of memory.
*/
static int __init
get_mem_prop(char *name, struct mem_pieces *mp)
{
struct reg_property *rp;
int i, s;
unsigned int *ip;
int nac = prom_n_addr_cells(memory_node);
int nsc = prom_n_size_cells(memory_node);
ip = (unsigned int *) get_property(memory_node, name, &s);
if (ip == NULL) {
printk(KERN_ERR "error: couldn't get %s property on /memory\n",
name);
return 0;
}
s /= (nsc + nac) * 4;
rp = mp->regions;
for (i = 0; i < s; ++i, ip += nac+nsc) {
if (nac >= 2 && ip[nac-2] != 0)
continue;
rp->address = ip[nac-1];
if (nsc >= 2 && ip[nac+nsc-2] != 0)
rp->size = ~0U;
else
rp->size = ip[nac+nsc-1];
++rp;
}
mp->n_regions = rp - mp->regions;
/* Make sure the pieces are sorted. */
mem_pieces_sort(mp);
mem_pieces_coalesce(mp);
return 1;
}
/*
* On systems with Open Firmware, collect information about
* physical RAM and which pieces are already in use.
* At this point, we have (at least) the first 8MB mapped with a BAT.
* Our text, data, bss use something over 1MB, starting at 0.
* Open Firmware may be using 1MB at the 4MB point.
*/
unsigned long __init
pmac_find_end_of_memory(void)
{
unsigned long a, total;
struct mem_pieces phys_mem;
/*
* Find out where physical memory is, and check that it
* starts at 0 and is contiguous. It seems that RAM is
* always physically contiguous on Power Macintoshes.
*
* Supporting discontiguous physical memory isn't hard,
* it just makes the virtual <-> physical mapping functions
* more complicated (or else you end up wasting space
* in mem_map).
*/
memory_node = find_devices("memory");
if (memory_node == NULL || !get_mem_prop("reg", &phys_mem)
|| phys_mem.n_regions == 0)
panic("No RAM??");
a = phys_mem.regions[0].address;
if (a != 0)
panic("RAM doesn't start at physical address 0");
total = phys_mem.regions[0].size;
if (phys_mem.n_regions > 1) {
printk("RAM starting at 0x%x is not contiguous\n",
phys_mem.regions[1].address);
printk("Using RAM from 0 to 0x%lx\n", total-1);
}
return total;
}
void __init
pmac_init(unsigned long r3, unsigned long r4, unsigned long r5,
unsigned long r6, unsigned long r7)
{
/* isa_io_base gets set in pmac_find_bridges */
isa_mem_base = PMAC_ISA_MEM_BASE;
pci_dram_offset = PMAC_PCI_DRAM_OFFSET;
ISA_DMA_THRESHOLD = ~0L;
DMA_MODE_READ = 1;
DMA_MODE_WRITE = 2;
ppc_md.setup_arch = pmac_setup_arch;
ppc_md.show_cpuinfo = pmac_show_cpuinfo;
ppc_md.show_percpuinfo = pmac_show_percpuinfo;
ppc_md.irq_canonicalize = NULL;
ppc_md.init_IRQ = pmac_pic_init;
ppc_md.get_irq = pmac_get_irq; /* Changed later on ... */
ppc_md.pcibios_fixup = pmac_pcibios_fixup;
ppc_md.pcibios_enable_device_hook = pmac_pci_enable_device_hook;
ppc_md.pcibios_after_init = pmac_pcibios_after_init;
ppc_md.phys_mem_access_prot = pci_phys_mem_access_prot;
ppc_md.restart = pmac_restart;
ppc_md.power_off = pmac_power_off;
ppc_md.halt = pmac_halt;
ppc_md.time_init = pmac_time_init;
ppc_md.set_rtc_time = pmac_set_rtc_time;
ppc_md.get_rtc_time = pmac_get_rtc_time;
ppc_md.calibrate_decr = pmac_calibrate_decr;
ppc_md.find_end_of_memory = pmac_find_end_of_memory;
ppc_md.feature_call = pmac_do_feature_call;
#if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE)
#ifdef CONFIG_BLK_DEV_IDE_PMAC
ppc_ide_md.ide_init_hwif = pmac_ide_init_hwif_ports;
ppc_ide_md.default_io_base = pmac_ide_get_base;
#endif /* CONFIG_BLK_DEV_IDE_PMAC */
#endif /* defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE) */
#ifdef CONFIG_BOOTX_TEXT
ppc_md.progress = pmac_progress;
#endif /* CONFIG_BOOTX_TEXT */
if (ppc_md.progress) ppc_md.progress("pmac_init(): exit", 0);
}
#ifdef CONFIG_BOOTX_TEXT
static void __init
pmac_progress(char *s, unsigned short hex)
{
if (boot_text_mapped) {
btext_drawstring(s);
btext_drawchar('\n');
}
}
#endif /* CONFIG_BOOTX_TEXT */
static int __init
pmac_declare_of_platform_devices(void)
{
struct device_node *np;
np = find_devices("uni-n");
if (np) {
for (np = np->child; np != NULL; np = np->sibling)
if (strncmp(np->name, "i2c", 3) == 0) {
of_platform_device_create(np, "uni-n-i2c");
break;
}
}
np = find_devices("u3");
if (np) {
for (np = np->child; np != NULL; np = np->sibling)
if (strncmp(np->name, "i2c", 3) == 0) {
of_platform_device_create(np, "u3-i2c");
break;
}
}
np = find_devices("valkyrie");
if (np)
of_platform_device_create(np, "valkyrie");
np = find_devices("platinum");
if (np)
of_platform_device_create(np, "platinum");
return 0;
}
device_initcall(pmac_declare_of_platform_devices);
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