linux_old1/arch/powerpc/platforms/powermac/setup.c

759 lines
17 KiB
C

/*
* Powermac setup and early boot code plus other random bits.
*
* PowerPC version
* Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
*
* Adapted for Power Macintosh by Paul Mackerras
* Copyright (C) 1996 Paul Mackerras (paulus@samba.org)
*
* 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/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/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/kexec.h>
#include <asm/pci-bridge.h>
#include <asm/ohare.h>
#include <asm/mediabay.h>
#include <asm/machdep.h>
#include <asm/dma.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/of_platform.h>
#include <asm/mmu_context.h>
#include <asm/iommu.h>
#include <asm/smu.h>
#include <asm/pmc.h>
#include <asm/lmb.h>
#include <asm/udbg.h>
#include "pmac.h"
#undef SHOW_GATWICK_IRQS
int ppc_override_l2cr = 0;
int ppc_override_l2cr_value;
int has_l2cache = 0;
int pmac_newworld;
static int current_root_goodness = -1;
extern struct machdep_calls pmac_md;
#define DEFAULT_ROOT_DEVICE Root_SDA1 /* sda1 - slightly silly choice */
#ifdef CONFIG_PPC64
#include <asm/udbg.h>
int sccdbg;
#endif
extern void zs_kgdb_hook(int tty_num);
sys_ctrler_t sys_ctrler = SYS_CTRLER_UNKNOWN;
EXPORT_SYMBOL(sys_ctrler);
#ifdef CONFIG_PMAC_SMU
unsigned long smu_cmdbuf_abs;
EXPORT_SYMBOL(smu_cmdbuf_abs);
#endif
#ifdef CONFIG_SMP
extern struct smp_ops_t psurge_smp_ops;
extern struct smp_ops_t core99_smp_ops;
#endif /* CONFIG_SMP */
static void pmac_show_cpuinfo(struct seq_file *m)
{
struct device_node *np;
const char *pp;
int plen;
int mbmodel;
unsigned int mbflags;
char* mbname;
mbmodel = pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL,
PMAC_MB_INFO_MODEL, 0);
mbflags = pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL,
PMAC_MB_INFO_FLAGS, 0);
if (pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL, PMAC_MB_INFO_NAME,
(long) &mbname) != 0)
mbname = "Unknown";
/* find motherboard type */
seq_printf(m, "machine\t\t: ");
np = of_find_node_by_path("/");
if (np != NULL) {
pp = get_property(np, "model", NULL);
if (pp != NULL)
seq_printf(m, "%s\n", pp);
else
seq_printf(m, "PowerMac\n");
pp = 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");
}
of_node_put(np);
} 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 = of_find_node_by_name(NULL, "l2-cache");
if (np == NULL)
np = of_find_node_by_type(NULL, "cache");
if (np != NULL) {
const unsigned int *ic = get_property(np, "i-cache-size", NULL);
const unsigned int *dc = 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");
of_node_put(np);
}
/* Indicate newworld/oldworld */
seq_printf(m, "pmac-generation\t: %s\n",
pmac_newworld ? "NewWorld" : "OldWorld");
}
#ifndef CONFIG_ADB_CUDA
int find_via_cuda(void)
{
if (!find_devices("via-cuda"))
return 0;
printk("WARNING ! Your machine is CUDA-based but your kernel\n");
printk(" wasn't compiled with CONFIG_ADB_CUDA option !\n");
return 0;
}
#endif
#ifndef CONFIG_ADB_PMU
int find_via_pmu(void)
{
if (!find_devices("via-pmu"))
return 0;
printk("WARNING ! Your machine is PMU-based but your kernel\n");
printk(" wasn't compiled with CONFIG_ADB_PMU option !\n");
return 0;
}
#endif
#ifndef CONFIG_PMAC_SMU
int smu_init(void)
{
/* should check and warn if SMU is present */
return 0;
}
#endif
#ifdef CONFIG_PPC32
static volatile u32 *sysctrl_regs;
static void __init ohare_init(void)
{
/* this area has the CPU identification register
and some registers used by smp boards */
sysctrl_regs = (volatile u32 *) ioremap(0xf8000000, 0x1000);
/*
* 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");
}
}
}
static void __init l2cr_init(void)
{
/* 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) {
const unsigned int *l2cr =
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 overridden (0x%x), "
"backside cache is %s\n",
ppc_override_l2cr_value,
(ppc_override_l2cr_value & 0x80000000)
? "enabled" : "disabled");
}
#endif
static void __init pmac_setup_arch(void)
{
struct device_node *cpu, *ic;
const 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. */
loops_per_jiffy = 50000000 / HZ;
cpu = of_find_node_by_type(NULL, "cpu");
if (cpu != NULL) {
fp = get_property(cpu, "clock-frequency", NULL);
if (fp != NULL) {
if (pvr >= 0x30 && pvr < 0x80)
/* PPC970 etc. */
loops_per_jiffy = *fp / (3 * HZ);
else if (pvr == 4 || pvr >= 8)
/* 604, G3, G4 etc. */
loops_per_jiffy = *fp / HZ;
else
/* 601, 603, etc. */
loops_per_jiffy = *fp / (2 * HZ);
}
of_node_put(cpu);
}
/* See if newworld or oldworld */
for (ic = NULL; (ic = of_find_all_nodes(ic)) != NULL; )
if (get_property(ic, "interrupt-controller", NULL))
break;
if (ic) {
pmac_newworld = 1;
of_node_put(ic);
}
/* Lookup PCI hosts */
pmac_pci_init();
#ifdef CONFIG_PPC32
ohare_init();
l2cr_init();
#endif /* CONFIG_PPC32 */
#ifdef CONFIG_KGDB
zs_kgdb_hook(0);
#endif
find_via_cuda();
find_via_pmu();
smu_init();
#if defined(CONFIG_NVRAM) || defined(CONFIG_PPC64)
pmac_nvram_init();
#endif
#ifdef CONFIG_PPC32
#ifdef CONFIG_BLK_DEV_INITRD
if (initrd_start)
ROOT_DEV = Root_RAM0;
else
#endif
ROOT_DEV = DEFAULT_ROOT_DEVICE;
#endif
#ifdef CONFIG_SMP
/* Check for Core99 */
if (find_devices("uni-n") || find_devices("u3") || find_devices("u4"))
smp_ops = &core99_smp_ops;
#ifdef CONFIG_PPC32
else
smp_ops = &psurge_smp_ops;
#endif
#endif /* CONFIG_SMP */
#ifdef CONFIG_ADB
if (strstr(cmd_line, "adb_sync")) {
extern int __adb_probe_sync;
__adb_probe_sync = 1;
}
#endif /* CONFIG_ADB */
}
char *bootpath;
char *bootdevice;
void *boot_host;
int boot_target;
int boot_part;
static 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);
}
}
}
EXPORT_SYMBOL(note_scsi_host);
#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
}
/* 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->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.id, current->active_mm->pgd);
return 0;
}
static int pmac_pm_valid(suspend_state_t state)
{
switch (state) {
case PM_SUSPEND_DISK:
return 1;
/* can't do any other states via generic mechanism yet */
default:
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,
.valid = pmac_pm_valid,
};
#endif /* CONFIG_SOFTWARE_SUSPEND */
static int initializing = 1;
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 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(boot_command_line, "root=");
if (p != NULL && (p == boot_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;
}
}
#ifdef CONFIG_ADB_CUDA
static void cuda_restart(void)
{
struct adb_request req;
cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_RESET_SYSTEM);
for (;;)
cuda_poll();
}
static void cuda_shutdown(void)
{
struct adb_request req;
cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_POWERDOWN);
for (;;)
cuda_poll();
}
#else
#define cuda_restart()
#define cuda_shutdown()
#endif
#ifndef CONFIG_ADB_PMU
#define pmu_restart()
#define pmu_shutdown()
#endif
#ifndef CONFIG_PMAC_SMU
#define smu_restart()
#define smu_shutdown()
#endif
static void pmac_restart(char *cmd)
{
switch (sys_ctrler) {
case SYS_CTRLER_CUDA:
cuda_restart();
break;
case SYS_CTRLER_PMU:
pmu_restart();
break;
case SYS_CTRLER_SMU:
smu_restart();
break;
default: ;
}
}
static void pmac_power_off(void)
{
switch (sys_ctrler) {
case SYS_CTRLER_CUDA:
cuda_shutdown();
break;
case SYS_CTRLER_PMU:
pmu_shutdown();
break;
case SYS_CTRLER_SMU:
smu_shutdown();
break;
default: ;
}
}
static void
pmac_halt(void)
{
pmac_power_off();
}
/*
* Early initialization.
*/
static void __init pmac_init_early(void)
{
/* Enable early btext debug if requested */
if (strstr(cmd_line, "btextdbg")) {
udbg_adb_init_early();
register_early_udbg_console();
}
/* Probe motherboard chipset */
pmac_feature_init();
/* Initialize debug stuff */
udbg_scc_init(!!strstr(cmd_line, "sccdbg"));
udbg_adb_init(!!strstr(cmd_line, "btextdbg"));
#ifdef CONFIG_PPC64
iommu_init_early_dart();
#endif
}
/*
* pmac has no legacy IO, anything calling this function has to
* fail or bad things will happen
*/
static int pmac_check_legacy_ioport(unsigned int baseport)
{
return -ENODEV;
}
static int __init pmac_declare_of_platform_devices(void)
{
struct device_node *np;
if (machine_is(chrp))
return -1;
if (!machine_is(powermac))
return 0;
np = of_find_node_by_name(NULL, "valkyrie");
if (np)
of_platform_device_create(np, "valkyrie", NULL);
np = of_find_node_by_name(NULL, "platinum");
if (np)
of_platform_device_create(np, "platinum", NULL);
np = of_find_node_by_type(NULL, "smu");
if (np) {
of_platform_device_create(np, "smu", NULL);
of_node_put(np);
}
return 0;
}
device_initcall(pmac_declare_of_platform_devices);
/*
* Called very early, MMU is off, device-tree isn't unflattened
*/
static int __init pmac_probe(void)
{
unsigned long root = of_get_flat_dt_root();
if (!of_flat_dt_is_compatible(root, "Power Macintosh") &&
!of_flat_dt_is_compatible(root, "MacRISC"))
return 0;
#ifdef CONFIG_PPC64
/*
* On U3, the DART (iommu) must be allocated now since it
* has an impact on htab_initialize (due to the large page it
* occupies having to be broken up so the DART itself is not
* part of the cacheable linar mapping
*/
alloc_dart_table();
hpte_init_native();
#endif
#ifdef CONFIG_PPC32
/* isa_io_base gets set in pmac_pci_init */
ISA_DMA_THRESHOLD = ~0L;
DMA_MODE_READ = 1;
DMA_MODE_WRITE = 2;
#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) */
#endif /* CONFIG_PPC32 */
#ifdef CONFIG_PMAC_SMU
/*
* SMU based G5s need some memory below 2Gb, at least the current
* driver needs that. We have to allocate it now. We allocate 4k
* (1 small page) for now.
*/
smu_cmdbuf_abs = lmb_alloc_base(4096, 4096, 0x80000000UL);
#endif /* CONFIG_PMAC_SMU */
return 1;
}
#ifdef CONFIG_PPC64
/* Move that to pci.c */
static int pmac_pci_probe_mode(struct pci_bus *bus)
{
struct device_node *node = bus->sysdata;
/* We need to use normal PCI probing for the AGP bus,
* since the device for the AGP bridge isn't in the tree.
*/
if (bus->self == NULL && (device_is_compatible(node, "u3-agp") ||
device_is_compatible(node, "u4-pcie")))
return PCI_PROBE_NORMAL;
return PCI_PROBE_DEVTREE;
}
#endif
define_machine(powermac) {
.name = "PowerMac",
.probe = pmac_probe,
.setup_arch = pmac_setup_arch,
.init_early = pmac_init_early,
.show_cpuinfo = pmac_show_cpuinfo,
.init_IRQ = pmac_pic_init,
.get_irq = NULL, /* changed later */
.pci_irq_fixup = pmac_pci_irq_fixup,
.restart = pmac_restart,
.power_off = pmac_power_off,
.halt = pmac_halt,
.time_init = pmac_time_init,
.get_boot_time = pmac_get_boot_time,
.set_rtc_time = pmac_set_rtc_time,
.get_rtc_time = pmac_get_rtc_time,
.calibrate_decr = pmac_calibrate_decr,
.feature_call = pmac_do_feature_call,
.check_legacy_ioport = pmac_check_legacy_ioport,
.progress = udbg_progress,
#ifdef CONFIG_PPC64
.pci_probe_mode = pmac_pci_probe_mode,
.power_save = power4_idle,
.enable_pmcs = power4_enable_pmcs,
#ifdef CONFIG_KEXEC
.machine_kexec = default_machine_kexec,
.machine_kexec_prepare = default_machine_kexec_prepare,
.machine_crash_shutdown = default_machine_crash_shutdown,
#endif
#endif /* CONFIG_PPC64 */
#ifdef CONFIG_PPC32
.pcibios_enable_device_hook = pmac_pci_enable_device_hook,
.pcibios_after_init = pmac_pcibios_after_init,
.phys_mem_access_prot = pci_phys_mem_access_prot,
#endif
#if defined(CONFIG_HOTPLUG_CPU) && defined(CONFIG_PPC64)
.cpu_die = generic_mach_cpu_die,
#endif
};