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linux_dsm_epyc7002/arch/ppc64/kernel/pmac_setup.c
Milton Miller c8f1c8be62 [PATCH] ppc64: Take udbg out of ppc_md 
Take udbg out of ppc_md. Allows us to not overwrite early udbg inits
when assigning ppc_md.

Signed-off-by: Milton Miller <miltonm@bga.com>
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-09-06 16:07:36 +10:00

504 lines
11 KiB
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..
*/
#undef DEBUG
#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 <asm/processor.h>
#include <asm/sections.h>
#include <asm/prom.h>
#include <asm/system.h>
#include <asm/io.h>
#include <asm/pci-bridge.h>
#include <asm/iommu.h>
#include <asm/machdep.h>
#include <asm/dma.h>
#include <asm/btext.h>
#include <asm/cputable.h>
#include <asm/pmac_feature.h>
#include <asm/time.h>
#include <asm/of_device.h>
#include <asm/lmb.h>
#include <asm/smu.h>
#include <asm/pmc.h>
#include "pmac.h"
#include "mpic.h"
#ifdef DEBUG
#define DBG(fmt...) udbg_printf(fmt)
#else
#define DBG(fmt...)
#endif
static int current_root_goodness = -1;
#define DEFAULT_ROOT_DEVICE Root_SDA1 /* sda1 - slightly silly choice */
extern int powersave_nap;
int sccdbg;
sys_ctrler_t sys_ctrler;
EXPORT_SYMBOL(sys_ctrler);
#ifdef CONFIG_PMAC_SMU
unsigned long smu_cmdbuf_abs;
EXPORT_SYMBOL(smu_cmdbuf_abs);
#endif
extern void udbg_init_scc(struct device_node *np);
static void __pmac pmac_show_cpuinfo(struct seq_file *m)
{
struct device_node *np;
char *pp;
int plen;
char* mbname;
int mbmodel = pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL,
PMAC_MB_INFO_MODEL, 0);
unsigned int 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 = 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);
/* Indicate newworld */
seq_printf(m, "pmac-generation\t: NewWorld\n");
}
static void __init pmac_setup_arch(void)
{
/* init to some ~sane value until calibrate_delay() runs */
loops_per_jiffy = 50000000;
/* Probe motherboard chipset */
pmac_feature_init();
#if 0
/* Lock-enable the SCC channel used for debug */
if (sccdbg) {
np = of_find_node_by_name(NULL, "escc");
if (np)
pmac_call_feature(PMAC_FTR_SCC_ENABLE, np,
PMAC_SCC_ASYNC | PMAC_SCC_FLAG_XMON, 1);
}
#endif
/* We can NAP */
powersave_nap = 1;
#ifdef CONFIG_ADB_PMU
/* Initialize the PMU if any */
find_via_pmu();
#endif
#ifdef CONFIG_PMAC_SMU
/* Initialize the SMU if any */
smu_init();
#endif
/* Init NVRAM access */
pmac_nvram_init();
/* Setup SMP callback */
#ifdef CONFIG_SMP
pmac_setup_smp();
#endif
/* Lookup PCI hosts */
pmac_pci_init();
#ifdef CONFIG_DUMMY_CONSOLE
conswitchp = &dummy_con;
#endif
printk(KERN_INFO "Using native/NAP idle loop\n");
}
#ifdef CONFIG_SCSI
void note_scsi_host(struct device_node *node, void *host)
{
/* Obsolete */
}
#endif
static int initializing = 1;
static int pmac_late_init(void)
{
initializing = 0;
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)
{
extern dev_t boot_dev;
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 (!boot_dev || dev == boot_dev) {
ROOT_DEV = dev + part;
boot_dev = 0;
current_root_goodness = goodness;
}
}
static void __pmac pmac_restart(char *cmd)
{
switch(sys_ctrler) {
#ifdef CONFIG_ADB_PMU
case SYS_CTRLER_PMU:
pmu_restart();
break;
#endif
#ifdef CONFIG_PMAC_SMU
case SYS_CTRLER_SMU:
smu_restart();
break;
#endif
default:
;
}
}
static void __pmac pmac_power_off(void)
{
switch(sys_ctrler) {
#ifdef CONFIG_ADB_PMU
case SYS_CTRLER_PMU:
pmu_shutdown();
break;
#endif
#ifdef CONFIG_PMAC_SMU
case SYS_CTRLER_SMU:
smu_shutdown();
break;
#endif
default:
;
}
}
static void __pmac pmac_halt(void)
{
pmac_power_off();
}
#ifdef CONFIG_BOOTX_TEXT
static void btext_putc(unsigned char c)
{
btext_drawchar(c);
}
static void __init init_boot_display(void)
{
char *name;
struct device_node *np = NULL;
int rc = -ENODEV;
printk("trying to initialize btext ...\n");
name = (char *)get_property(of_chosen, "linux,stdout-path", NULL);
if (name != NULL) {
np = of_find_node_by_path(name);
if (np != NULL) {
if (strcmp(np->type, "display") != 0) {
printk("boot stdout isn't a display !\n");
of_node_put(np);
np = NULL;
}
}
}
if (np)
rc = btext_initialize(np);
if (rc == 0)
return;
for (np = NULL; (np = of_find_node_by_type(np, "display"));) {
if (get_property(np, "linux,opened", NULL)) {
printk("trying %s ...\n", np->full_name);
rc = btext_initialize(np);
printk("result: %d\n", rc);
}
if (rc == 0)
return;
}
}
#endif /* CONFIG_BOOTX_TEXT */
/*
* Early initialization.
*/
static void __init pmac_init_early(void)
{
DBG(" -> pmac_init_early\n");
/* Initialize hash table, from now on, we can take hash faults
* and call ioremap
*/
hpte_init_native();
/* Init SCC */
if (strstr(cmd_line, "sccdbg")) {
sccdbg = 1;
udbg_init_scc(NULL);
}
#ifdef CONFIG_BOOTX_TEXT
else {
init_boot_display();
udbg_putc = btext_putc;
}
#endif /* CONFIG_BOOTX_TEXT */
/* Setup interrupt mapping options */
ppc64_interrupt_controller = IC_OPEN_PIC;
iommu_init_early_u3();
DBG(" <- pmac_init_early\n");
}
static int pmac_u3_cascade(struct pt_regs *regs, void *data)
{
return mpic_get_one_irq((struct mpic *)data, regs);
}
static __init void pmac_init_IRQ(void)
{
struct device_node *irqctrler = NULL;
struct device_node *irqctrler2 = NULL;
struct device_node *np = NULL;
struct mpic *mpic1, *mpic2;
/* We first try to detect Apple's new Core99 chipset, since mac-io
* is quite different on those machines and contains an IBM MPIC2.
*/
while ((np = of_find_node_by_type(np, "open-pic")) != NULL) {
struct device_node *parent = of_get_parent(np);
if (parent && !strcmp(parent->name, "u3"))
irqctrler2 = of_node_get(np);
else
irqctrler = of_node_get(np);
of_node_put(parent);
}
if (irqctrler != NULL && irqctrler->n_addrs > 0) {
unsigned char senses[128];
printk(KERN_INFO "PowerMac using OpenPIC irq controller at 0x%08x\n",
(unsigned int)irqctrler->addrs[0].address);
prom_get_irq_senses(senses, 0, 128);
mpic1 = mpic_alloc(irqctrler->addrs[0].address,
MPIC_PRIMARY | MPIC_WANTS_RESET,
0, 0, 128, 256, senses, 128, " K2-MPIC ");
BUG_ON(mpic1 == NULL);
mpic_init(mpic1);
if (irqctrler2 != NULL && irqctrler2->n_intrs > 0 &&
irqctrler2->n_addrs > 0) {
printk(KERN_INFO "Slave OpenPIC at 0x%08x hooked on IRQ %d\n",
(u32)irqctrler2->addrs[0].address,
irqctrler2->intrs[0].line);
pmac_call_feature(PMAC_FTR_ENABLE_MPIC, irqctrler2, 0, 0);
prom_get_irq_senses(senses, 128, 128 + 128);
/* We don't need to set MPIC_BROKEN_U3 here since we don't have
* hypertransport interrupts routed to it
*/
mpic2 = mpic_alloc(irqctrler2->addrs[0].address,
MPIC_BIG_ENDIAN | MPIC_WANTS_RESET,
0, 128, 128, 0, senses, 128, " U3-MPIC ");
BUG_ON(mpic2 == NULL);
mpic_init(mpic2);
mpic_setup_cascade(irqctrler2->intrs[0].line,
pmac_u3_cascade, mpic2);
}
}
of_node_put(irqctrler);
of_node_put(irqctrler2);
}
static void __init pmac_progress(char *s, unsigned short hex)
{
if (sccdbg) {
udbg_puts(s);
udbg_puts("\n");
}
#ifdef CONFIG_BOOTX_TEXT
else if (boot_text_mapped) {
btext_drawstring(s);
btext_drawstring("\n");
}
#endif /* CONFIG_BOOTX_TEXT */
}
/*
* 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;
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;
}
}
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(int platform)
{
if (platform != PLATFORM_POWERMAC)
return 0;
/*
* 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_u3_dart_table();
#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;
}
struct machdep_calls __initdata pmac_md = {
#ifdef CONFIG_HOTPLUG_CPU
.cpu_die = generic_mach_cpu_die,
#endif
.probe = pmac_probe,
.setup_arch = pmac_setup_arch,
.init_early = pmac_init_early,
.get_cpuinfo = pmac_show_cpuinfo,
.init_IRQ = pmac_init_IRQ,
.get_irq = mpic_get_irq,
.pcibios_fixup = pmac_pcibios_fixup,
.restart = pmac_restart,
.power_off = pmac_power_off,
.halt = pmac_halt,
.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,
.progress = pmac_progress,
.check_legacy_ioport = pmac_check_legacy_ioport,
.idle_loop = native_idle,
.enable_pmcs = power4_enable_pmcs,
};
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