1008 lines
25 KiB
C
1008 lines
25 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* Common boot and setup code for both 32-bit and 64-bit.
|
|
* Extracted from arch/powerpc/kernel/setup_64.c.
|
|
*
|
|
* Copyright (C) 2001 PPC64 Team, IBM Corp
|
|
*/
|
|
|
|
#undef DEBUG
|
|
|
|
#include <linux/export.h>
|
|
#include <linux/panic_notifier.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/platform_device.h>
|
|
#include <linux/printk.h>
|
|
#include <linux/seq_file.h>
|
|
#include <linux/ioport.h>
|
|
#include <linux/console.h>
|
|
#include <linux/screen_info.h>
|
|
#include <linux/root_dev.h>
|
|
#include <linux/cpu.h>
|
|
#include <linux/unistd.h>
|
|
#include <linux/seq_buf.h>
|
|
#include <linux/serial.h>
|
|
#include <linux/serial_8250.h>
|
|
#include <linux/percpu.h>
|
|
#include <linux/memblock.h>
|
|
#include <linux/of_irq.h>
|
|
#include <linux/of_fdt.h>
|
|
#include <linux/of_platform.h>
|
|
#include <linux/hugetlb.h>
|
|
#include <linux/pgtable.h>
|
|
#include <asm/io.h>
|
|
#include <asm/paca.h>
|
|
#include <asm/processor.h>
|
|
#include <asm/vdso_datapage.h>
|
|
#include <asm/smp.h>
|
|
#include <asm/elf.h>
|
|
#include <asm/machdep.h>
|
|
#include <asm/time.h>
|
|
#include <asm/cputable.h>
|
|
#include <asm/sections.h>
|
|
#include <asm/firmware.h>
|
|
#include <asm/btext.h>
|
|
#include <asm/nvram.h>
|
|
#include <asm/setup.h>
|
|
#include <asm/rtas.h>
|
|
#include <asm/iommu.h>
|
|
#include <asm/serial.h>
|
|
#include <asm/cache.h>
|
|
#include <asm/page.h>
|
|
#include <asm/mmu.h>
|
|
#include <asm/xmon.h>
|
|
#include <asm/cputhreads.h>
|
|
#include <mm/mmu_decl.h>
|
|
#include <asm/archrandom.h>
|
|
#include <asm/fadump.h>
|
|
#include <asm/udbg.h>
|
|
#include <asm/hugetlb.h>
|
|
#include <asm/livepatch.h>
|
|
#include <asm/mmu_context.h>
|
|
#include <asm/cpu_has_feature.h>
|
|
#include <asm/kasan.h>
|
|
#include <asm/mce.h>
|
|
|
|
#include "setup.h"
|
|
|
|
#ifdef DEBUG
|
|
#define DBG(fmt...) udbg_printf(fmt)
|
|
#else
|
|
#define DBG(fmt...)
|
|
#endif
|
|
|
|
/* The main machine-dep calls structure
|
|
*/
|
|
struct machdep_calls ppc_md;
|
|
EXPORT_SYMBOL(ppc_md);
|
|
struct machdep_calls *machine_id;
|
|
EXPORT_SYMBOL(machine_id);
|
|
|
|
int boot_cpuid = -1;
|
|
EXPORT_SYMBOL_GPL(boot_cpuid);
|
|
|
|
#ifdef CONFIG_PPC64
|
|
int boot_cpu_hwid = -1;
|
|
#endif
|
|
|
|
/*
|
|
* 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;
|
|
|
|
/*
|
|
* This still seems to be needed... -- paulus
|
|
*/
|
|
struct screen_info screen_info = {
|
|
.orig_x = 0,
|
|
.orig_y = 25,
|
|
.orig_video_cols = 80,
|
|
.orig_video_lines = 25,
|
|
.orig_video_isVGA = 1,
|
|
.orig_video_points = 16
|
|
};
|
|
#if defined(CONFIG_FB_VGA16_MODULE)
|
|
EXPORT_SYMBOL(screen_info);
|
|
#endif
|
|
|
|
/* Variables required to store legacy IO irq routing */
|
|
int of_i8042_kbd_irq;
|
|
EXPORT_SYMBOL_GPL(of_i8042_kbd_irq);
|
|
int of_i8042_aux_irq;
|
|
EXPORT_SYMBOL_GPL(of_i8042_aux_irq);
|
|
|
|
#ifdef __DO_IRQ_CANON
|
|
/* XXX should go elsewhere eventually */
|
|
int ppc_do_canonicalize_irqs;
|
|
EXPORT_SYMBOL(ppc_do_canonicalize_irqs);
|
|
#endif
|
|
|
|
#ifdef CONFIG_CRASH_CORE
|
|
/* This keeps a track of which one is the crashing cpu. */
|
|
int crashing_cpu = -1;
|
|
#endif
|
|
|
|
/* also used by kexec */
|
|
void machine_shutdown(void)
|
|
{
|
|
/*
|
|
* if fadump is active, cleanup the fadump registration before we
|
|
* shutdown.
|
|
*/
|
|
fadump_cleanup();
|
|
|
|
if (ppc_md.machine_shutdown)
|
|
ppc_md.machine_shutdown();
|
|
}
|
|
|
|
static void machine_hang(void)
|
|
{
|
|
pr_emerg("System Halted, OK to turn off power\n");
|
|
local_irq_disable();
|
|
while (1)
|
|
;
|
|
}
|
|
|
|
void machine_restart(char *cmd)
|
|
{
|
|
machine_shutdown();
|
|
if (ppc_md.restart)
|
|
ppc_md.restart(cmd);
|
|
|
|
smp_send_stop();
|
|
|
|
do_kernel_restart(cmd);
|
|
mdelay(1000);
|
|
|
|
machine_hang();
|
|
}
|
|
|
|
void machine_power_off(void)
|
|
{
|
|
machine_shutdown();
|
|
do_kernel_power_off();
|
|
smp_send_stop();
|
|
machine_hang();
|
|
}
|
|
/* Used by the G5 thermal driver */
|
|
EXPORT_SYMBOL_GPL(machine_power_off);
|
|
|
|
void (*pm_power_off)(void);
|
|
EXPORT_SYMBOL_GPL(pm_power_off);
|
|
|
|
size_t __must_check arch_get_random_seed_longs(unsigned long *v, size_t max_longs)
|
|
{
|
|
if (max_longs && ppc_md.get_random_seed && ppc_md.get_random_seed(v))
|
|
return 1;
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(arch_get_random_seed_longs);
|
|
|
|
void machine_halt(void)
|
|
{
|
|
machine_shutdown();
|
|
if (ppc_md.halt)
|
|
ppc_md.halt();
|
|
|
|
smp_send_stop();
|
|
machine_hang();
|
|
}
|
|
|
|
#ifdef CONFIG_SMP
|
|
DEFINE_PER_CPU(unsigned int, cpu_pvr);
|
|
#endif
|
|
|
|
static void show_cpuinfo_summary(struct seq_file *m)
|
|
{
|
|
struct device_node *root;
|
|
const char *model = NULL;
|
|
unsigned long bogosum = 0;
|
|
int i;
|
|
|
|
if (IS_ENABLED(CONFIG_SMP) && IS_ENABLED(CONFIG_PPC32)) {
|
|
for_each_online_cpu(i)
|
|
bogosum += loops_per_jiffy;
|
|
seq_printf(m, "total bogomips\t: %lu.%02lu\n",
|
|
bogosum / (500000 / HZ), bogosum / (5000 / HZ) % 100);
|
|
}
|
|
seq_printf(m, "timebase\t: %lu\n", ppc_tb_freq);
|
|
if (ppc_md.name)
|
|
seq_printf(m, "platform\t: %s\n", ppc_md.name);
|
|
root = of_find_node_by_path("/");
|
|
if (root)
|
|
model = of_get_property(root, "model", NULL);
|
|
if (model)
|
|
seq_printf(m, "model\t\t: %s\n", model);
|
|
of_node_put(root);
|
|
|
|
if (ppc_md.show_cpuinfo != NULL)
|
|
ppc_md.show_cpuinfo(m);
|
|
|
|
/* Display the amount of memory */
|
|
if (IS_ENABLED(CONFIG_PPC32))
|
|
seq_printf(m, "Memory\t\t: %d MB\n",
|
|
(unsigned int)(total_memory / (1024 * 1024)));
|
|
}
|
|
|
|
static int show_cpuinfo(struct seq_file *m, void *v)
|
|
{
|
|
unsigned long cpu_id = (unsigned long)v - 1;
|
|
unsigned int pvr;
|
|
unsigned long proc_freq;
|
|
unsigned short maj;
|
|
unsigned short min;
|
|
|
|
#ifdef CONFIG_SMP
|
|
pvr = per_cpu(cpu_pvr, cpu_id);
|
|
#else
|
|
pvr = mfspr(SPRN_PVR);
|
|
#endif
|
|
maj = (pvr >> 8) & 0xFF;
|
|
min = pvr & 0xFF;
|
|
|
|
seq_printf(m, "processor\t: %lu\ncpu\t\t: ", cpu_id);
|
|
|
|
if (cur_cpu_spec->pvr_mask && cur_cpu_spec->cpu_name)
|
|
seq_puts(m, cur_cpu_spec->cpu_name);
|
|
else
|
|
seq_printf(m, "unknown (%08x)", pvr);
|
|
|
|
if (cpu_has_feature(CPU_FTR_ALTIVEC))
|
|
seq_puts(m, ", altivec supported");
|
|
|
|
seq_putc(m, '\n');
|
|
|
|
#ifdef CONFIG_TAU
|
|
if (cpu_has_feature(CPU_FTR_TAU)) {
|
|
if (IS_ENABLED(CONFIG_TAU_AVERAGE)) {
|
|
/* more straightforward, but potentially misleading */
|
|
seq_printf(m, "temperature \t: %u C (uncalibrated)\n",
|
|
cpu_temp(cpu_id));
|
|
} else {
|
|
/* show the actual temp sensor range */
|
|
u32 temp;
|
|
temp = cpu_temp_both(cpu_id);
|
|
seq_printf(m, "temperature \t: %u-%u C (uncalibrated)\n",
|
|
temp & 0xff, temp >> 16);
|
|
}
|
|
}
|
|
#endif /* CONFIG_TAU */
|
|
|
|
/*
|
|
* Platforms that have variable clock rates, should implement
|
|
* the method ppc_md.get_proc_freq() that reports the clock
|
|
* rate of a given cpu. The rest can use ppc_proc_freq to
|
|
* report the clock rate that is same across all cpus.
|
|
*/
|
|
if (ppc_md.get_proc_freq)
|
|
proc_freq = ppc_md.get_proc_freq(cpu_id);
|
|
else
|
|
proc_freq = ppc_proc_freq;
|
|
|
|
if (proc_freq)
|
|
seq_printf(m, "clock\t\t: %lu.%06luMHz\n",
|
|
proc_freq / 1000000, proc_freq % 1000000);
|
|
|
|
/* If we are a Freescale core do a simple check so
|
|
* we don't have to keep adding cases in the future */
|
|
if (PVR_VER(pvr) & 0x8000) {
|
|
switch (PVR_VER(pvr)) {
|
|
case 0x8000: /* 7441/7450/7451, Voyager */
|
|
case 0x8001: /* 7445/7455, Apollo 6 */
|
|
case 0x8002: /* 7447/7457, Apollo 7 */
|
|
case 0x8003: /* 7447A, Apollo 7 PM */
|
|
case 0x8004: /* 7448, Apollo 8 */
|
|
case 0x800c: /* 7410, Nitro */
|
|
maj = ((pvr >> 8) & 0xF);
|
|
min = PVR_MIN(pvr);
|
|
break;
|
|
default: /* e500/book-e */
|
|
maj = PVR_MAJ(pvr);
|
|
min = PVR_MIN(pvr);
|
|
break;
|
|
}
|
|
} else {
|
|
switch (PVR_VER(pvr)) {
|
|
case 0x1008: /* 740P/750P ?? */
|
|
maj = ((pvr >> 8) & 0xFF) - 1;
|
|
min = pvr & 0xFF;
|
|
break;
|
|
case 0x004e: /* POWER9 bits 12-15 give chip type */
|
|
case 0x0080: /* POWER10 bit 12 gives SMT8/4 */
|
|
maj = (pvr >> 8) & 0x0F;
|
|
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));
|
|
|
|
if (IS_ENABLED(CONFIG_PPC32))
|
|
seq_printf(m, "bogomips\t: %lu.%02lu\n", loops_per_jiffy / (500000 / HZ),
|
|
(loops_per_jiffy / (5000 / HZ)) % 100);
|
|
|
|
seq_putc(m, '\n');
|
|
|
|
/* If this is the last cpu, print the summary */
|
|
if (cpumask_next(cpu_id, cpu_online_mask) >= nr_cpu_ids)
|
|
show_cpuinfo_summary(m);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void *c_start(struct seq_file *m, loff_t *pos)
|
|
{
|
|
if (*pos == 0) /* just in case, cpu 0 is not the first */
|
|
*pos = cpumask_first(cpu_online_mask);
|
|
else
|
|
*pos = cpumask_next(*pos - 1, cpu_online_mask);
|
|
if ((*pos) < nr_cpu_ids)
|
|
return (void *)(unsigned long)(*pos + 1);
|
|
return 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)
|
|
{
|
|
}
|
|
|
|
const struct seq_operations cpuinfo_op = {
|
|
.start = c_start,
|
|
.next = c_next,
|
|
.stop = c_stop,
|
|
.show = show_cpuinfo,
|
|
};
|
|
|
|
void __init check_for_initrd(void)
|
|
{
|
|
#ifdef CONFIG_BLK_DEV_INITRD
|
|
DBG(" -> check_for_initrd() initrd_start=0x%lx initrd_end=0x%lx\n",
|
|
initrd_start, initrd_end);
|
|
|
|
/* If we were passed an initrd, set the ROOT_DEV properly if the values
|
|
* look sensible. If not, clear initrd reference.
|
|
*/
|
|
if (is_kernel_addr(initrd_start) && is_kernel_addr(initrd_end) &&
|
|
initrd_end > initrd_start)
|
|
ROOT_DEV = Root_RAM0;
|
|
else
|
|
initrd_start = initrd_end = 0;
|
|
|
|
if (initrd_start)
|
|
pr_info("Found initrd at 0x%lx:0x%lx\n", initrd_start, initrd_end);
|
|
|
|
DBG(" <- check_for_initrd()\n");
|
|
#endif /* CONFIG_BLK_DEV_INITRD */
|
|
}
|
|
|
|
#ifdef CONFIG_SMP
|
|
|
|
int threads_per_core, threads_per_subcore, threads_shift __read_mostly;
|
|
cpumask_t threads_core_mask __read_mostly;
|
|
EXPORT_SYMBOL_GPL(threads_per_core);
|
|
EXPORT_SYMBOL_GPL(threads_per_subcore);
|
|
EXPORT_SYMBOL_GPL(threads_shift);
|
|
EXPORT_SYMBOL_GPL(threads_core_mask);
|
|
|
|
static void __init cpu_init_thread_core_maps(int tpc)
|
|
{
|
|
int i;
|
|
|
|
threads_per_core = tpc;
|
|
threads_per_subcore = tpc;
|
|
cpumask_clear(&threads_core_mask);
|
|
|
|
/* This implementation only supports power of 2 number of threads
|
|
* for simplicity and performance
|
|
*/
|
|
threads_shift = ilog2(tpc);
|
|
BUG_ON(tpc != (1 << threads_shift));
|
|
|
|
for (i = 0; i < tpc; i++)
|
|
cpumask_set_cpu(i, &threads_core_mask);
|
|
|
|
printk(KERN_INFO "CPU maps initialized for %d thread%s per core\n",
|
|
tpc, tpc > 1 ? "s" : "");
|
|
printk(KERN_DEBUG " (thread shift is %d)\n", threads_shift);
|
|
}
|
|
|
|
|
|
u32 *cpu_to_phys_id = NULL;
|
|
|
|
/**
|
|
* setup_cpu_maps - initialize the following cpu maps:
|
|
* cpu_possible_mask
|
|
* cpu_present_mask
|
|
*
|
|
* Having the possible map set up early allows us to restrict allocations
|
|
* of things like irqstacks to nr_cpu_ids rather than NR_CPUS.
|
|
*
|
|
* We do not initialize the online map here; cpus set their own bits in
|
|
* cpu_online_mask as they come up.
|
|
*
|
|
* This function is valid only for Open Firmware systems. finish_device_tree
|
|
* must be called before using this.
|
|
*
|
|
* While we're here, we may as well set the "physical" cpu ids in the paca.
|
|
*
|
|
* NOTE: This must match the parsing done in early_init_dt_scan_cpus.
|
|
*/
|
|
void __init smp_setup_cpu_maps(void)
|
|
{
|
|
struct device_node *dn;
|
|
int cpu = 0;
|
|
int nthreads = 1;
|
|
|
|
DBG("smp_setup_cpu_maps()\n");
|
|
|
|
cpu_to_phys_id = memblock_alloc(nr_cpu_ids * sizeof(u32),
|
|
__alignof__(u32));
|
|
if (!cpu_to_phys_id)
|
|
panic("%s: Failed to allocate %zu bytes align=0x%zx\n",
|
|
__func__, nr_cpu_ids * sizeof(u32), __alignof__(u32));
|
|
|
|
for_each_node_by_type(dn, "cpu") {
|
|
const __be32 *intserv;
|
|
__be32 cpu_be;
|
|
int j, len;
|
|
|
|
DBG(" * %pOF...\n", dn);
|
|
|
|
intserv = of_get_property(dn, "ibm,ppc-interrupt-server#s",
|
|
&len);
|
|
if (intserv) {
|
|
DBG(" ibm,ppc-interrupt-server#s -> %lu threads\n",
|
|
(len / sizeof(int)));
|
|
} else {
|
|
DBG(" no ibm,ppc-interrupt-server#s -> 1 thread\n");
|
|
intserv = of_get_property(dn, "reg", &len);
|
|
if (!intserv) {
|
|
cpu_be = cpu_to_be32(cpu);
|
|
/* XXX: what is this? uninitialized?? */
|
|
intserv = &cpu_be; /* assume logical == phys */
|
|
len = 4;
|
|
}
|
|
}
|
|
|
|
nthreads = len / sizeof(int);
|
|
|
|
for (j = 0; j < nthreads && cpu < nr_cpu_ids; j++) {
|
|
bool avail;
|
|
|
|
DBG(" thread %d -> cpu %d (hard id %d)\n",
|
|
j, cpu, be32_to_cpu(intserv[j]));
|
|
|
|
avail = of_device_is_available(dn);
|
|
if (!avail)
|
|
avail = !of_property_match_string(dn,
|
|
"enable-method", "spin-table");
|
|
|
|
set_cpu_present(cpu, avail);
|
|
set_cpu_possible(cpu, true);
|
|
cpu_to_phys_id[cpu] = be32_to_cpu(intserv[j]);
|
|
cpu++;
|
|
}
|
|
|
|
if (cpu >= nr_cpu_ids) {
|
|
of_node_put(dn);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* If no SMT supported, nthreads is forced to 1 */
|
|
if (!cpu_has_feature(CPU_FTR_SMT)) {
|
|
DBG(" SMT disabled ! nthreads forced to 1\n");
|
|
nthreads = 1;
|
|
}
|
|
|
|
#ifdef CONFIG_PPC64
|
|
/*
|
|
* On pSeries LPAR, we need to know how many cpus
|
|
* could possibly be added to this partition.
|
|
*/
|
|
if (firmware_has_feature(FW_FEATURE_LPAR) &&
|
|
(dn = of_find_node_by_path("/rtas"))) {
|
|
int num_addr_cell, num_size_cell, maxcpus;
|
|
const __be32 *ireg;
|
|
|
|
num_addr_cell = of_n_addr_cells(dn);
|
|
num_size_cell = of_n_size_cells(dn);
|
|
|
|
ireg = of_get_property(dn, "ibm,lrdr-capacity", NULL);
|
|
|
|
if (!ireg)
|
|
goto out;
|
|
|
|
maxcpus = be32_to_cpup(ireg + num_addr_cell + num_size_cell);
|
|
|
|
/* Double maxcpus for processors which have SMT capability */
|
|
if (cpu_has_feature(CPU_FTR_SMT))
|
|
maxcpus *= nthreads;
|
|
|
|
if (maxcpus > nr_cpu_ids) {
|
|
printk(KERN_WARNING
|
|
"Partition configured for %d cpus, "
|
|
"operating system maximum is %u.\n",
|
|
maxcpus, nr_cpu_ids);
|
|
maxcpus = nr_cpu_ids;
|
|
} else
|
|
printk(KERN_INFO "Partition configured for %d cpus.\n",
|
|
maxcpus);
|
|
|
|
for (cpu = 0; cpu < maxcpus; cpu++)
|
|
set_cpu_possible(cpu, true);
|
|
out:
|
|
of_node_put(dn);
|
|
}
|
|
vdso_data->processorCount = num_present_cpus();
|
|
#endif /* CONFIG_PPC64 */
|
|
|
|
/* Initialize CPU <=> thread mapping/
|
|
*
|
|
* WARNING: We assume that the number of threads is the same for
|
|
* every CPU in the system. If that is not the case, then some code
|
|
* here will have to be reworked
|
|
*/
|
|
cpu_init_thread_core_maps(nthreads);
|
|
|
|
/* Now that possible cpus are set, set nr_cpu_ids for later use */
|
|
setup_nr_cpu_ids();
|
|
|
|
free_unused_pacas();
|
|
}
|
|
#endif /* CONFIG_SMP */
|
|
|
|
#ifdef CONFIG_PCSPKR_PLATFORM
|
|
static __init int add_pcspkr(void)
|
|
{
|
|
struct device_node *np;
|
|
struct platform_device *pd;
|
|
int ret;
|
|
|
|
np = of_find_compatible_node(NULL, NULL, "pnpPNP,100");
|
|
of_node_put(np);
|
|
if (!np)
|
|
return -ENODEV;
|
|
|
|
pd = platform_device_alloc("pcspkr", -1);
|
|
if (!pd)
|
|
return -ENOMEM;
|
|
|
|
ret = platform_device_add(pd);
|
|
if (ret)
|
|
platform_device_put(pd);
|
|
|
|
return ret;
|
|
}
|
|
device_initcall(add_pcspkr);
|
|
#endif /* CONFIG_PCSPKR_PLATFORM */
|
|
|
|
static char ppc_hw_desc_buf[128] __initdata;
|
|
|
|
struct seq_buf ppc_hw_desc __initdata = {
|
|
.buffer = ppc_hw_desc_buf,
|
|
.size = sizeof(ppc_hw_desc_buf),
|
|
.len = 0,
|
|
.readpos = 0,
|
|
};
|
|
|
|
static __init void probe_machine(void)
|
|
{
|
|
extern struct machdep_calls __machine_desc_start;
|
|
extern struct machdep_calls __machine_desc_end;
|
|
unsigned int i;
|
|
|
|
/*
|
|
* Iterate all ppc_md structures until we find the proper
|
|
* one for the current machine type
|
|
*/
|
|
DBG("Probing machine type ...\n");
|
|
|
|
/*
|
|
* Check ppc_md is empty, if not we have a bug, ie, we setup an
|
|
* entry before probe_machine() which will be overwritten
|
|
*/
|
|
for (i = 0; i < (sizeof(ppc_md) / sizeof(void *)); i++) {
|
|
if (((void **)&ppc_md)[i]) {
|
|
printk(KERN_ERR "Entry %d in ppc_md non empty before"
|
|
" machine probe !\n", i);
|
|
}
|
|
}
|
|
|
|
for (machine_id = &__machine_desc_start;
|
|
machine_id < &__machine_desc_end;
|
|
machine_id++) {
|
|
DBG(" %s ...\n", machine_id->name);
|
|
if (machine_id->compatible && !of_machine_is_compatible(machine_id->compatible))
|
|
continue;
|
|
memcpy(&ppc_md, machine_id, sizeof(struct machdep_calls));
|
|
if (ppc_md.probe && !ppc_md.probe())
|
|
continue;
|
|
DBG(" %s match !\n", machine_id->name);
|
|
break;
|
|
}
|
|
/* What can we do if we didn't find ? */
|
|
if (machine_id >= &__machine_desc_end) {
|
|
pr_err("No suitable machine description found !\n");
|
|
for (;;);
|
|
}
|
|
|
|
// Append the machine name to other info we've gathered
|
|
seq_buf_puts(&ppc_hw_desc, ppc_md.name);
|
|
|
|
// Set the generic hardware description shown in oopses
|
|
dump_stack_set_arch_desc(ppc_hw_desc.buffer);
|
|
|
|
pr_info("Hardware name: %s\n", ppc_hw_desc.buffer);
|
|
}
|
|
|
|
/* Match a class of boards, not a specific device configuration. */
|
|
int check_legacy_ioport(unsigned long base_port)
|
|
{
|
|
struct device_node *parent, *np = NULL;
|
|
int ret = -ENODEV;
|
|
|
|
switch(base_port) {
|
|
case I8042_DATA_REG:
|
|
if (!(np = of_find_compatible_node(NULL, NULL, "pnpPNP,303")))
|
|
np = of_find_compatible_node(NULL, NULL, "pnpPNP,f03");
|
|
if (np) {
|
|
parent = of_get_parent(np);
|
|
|
|
of_i8042_kbd_irq = irq_of_parse_and_map(parent, 0);
|
|
if (!of_i8042_kbd_irq)
|
|
of_i8042_kbd_irq = 1;
|
|
|
|
of_i8042_aux_irq = irq_of_parse_and_map(parent, 1);
|
|
if (!of_i8042_aux_irq)
|
|
of_i8042_aux_irq = 12;
|
|
|
|
of_node_put(np);
|
|
np = parent;
|
|
break;
|
|
}
|
|
np = of_find_node_by_type(NULL, "8042");
|
|
/* Pegasos has no device_type on its 8042 node, look for the
|
|
* name instead */
|
|
if (!np)
|
|
np = of_find_node_by_name(NULL, "8042");
|
|
if (np) {
|
|
of_i8042_kbd_irq = 1;
|
|
of_i8042_aux_irq = 12;
|
|
}
|
|
break;
|
|
case FDC_BASE: /* FDC1 */
|
|
np = of_find_node_by_type(NULL, "fdc");
|
|
break;
|
|
default:
|
|
/* ipmi is supposed to fail here */
|
|
break;
|
|
}
|
|
if (!np)
|
|
return ret;
|
|
parent = of_get_parent(np);
|
|
if (parent) {
|
|
if (of_node_is_type(parent, "isa"))
|
|
ret = 0;
|
|
of_node_put(parent);
|
|
}
|
|
of_node_put(np);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(check_legacy_ioport);
|
|
|
|
/*
|
|
* Panic notifiers setup
|
|
*
|
|
* We have 3 notifiers for powerpc, each one from a different "nature":
|
|
*
|
|
* - ppc_panic_fadump_handler() is a hypervisor notifier, which hard-disables
|
|
* IRQs and deal with the Firmware-Assisted dump, when it is configured;
|
|
* should run early in the panic path.
|
|
*
|
|
* - dump_kernel_offset() is an informative notifier, just showing the KASLR
|
|
* offset if we have RANDOMIZE_BASE set.
|
|
*
|
|
* - ppc_panic_platform_handler() is a low-level handler that's registered
|
|
* only if the platform wishes to perform final actions in the panic path,
|
|
* hence it should run late and might not even return. Currently, only
|
|
* pseries and ps3 platforms register callbacks.
|
|
*/
|
|
static int ppc_panic_fadump_handler(struct notifier_block *this,
|
|
unsigned long event, void *ptr)
|
|
{
|
|
/*
|
|
* panic does a local_irq_disable, but we really
|
|
* want interrupts to be hard disabled.
|
|
*/
|
|
hard_irq_disable();
|
|
|
|
/*
|
|
* If firmware-assisted dump has been registered then trigger
|
|
* its callback and let the firmware handles everything else.
|
|
*/
|
|
crash_fadump(NULL, ptr);
|
|
|
|
return NOTIFY_DONE;
|
|
}
|
|
|
|
static int dump_kernel_offset(struct notifier_block *self, unsigned long v,
|
|
void *p)
|
|
{
|
|
pr_emerg("Kernel Offset: 0x%lx from 0x%lx\n",
|
|
kaslr_offset(), KERNELBASE);
|
|
|
|
return NOTIFY_DONE;
|
|
}
|
|
|
|
static int ppc_panic_platform_handler(struct notifier_block *this,
|
|
unsigned long event, void *ptr)
|
|
{
|
|
/*
|
|
* This handler is only registered if we have a panic callback
|
|
* on ppc_md, hence NULL check is not needed.
|
|
* Also, it may not return, so it runs really late on panic path.
|
|
*/
|
|
ppc_md.panic(ptr);
|
|
|
|
return NOTIFY_DONE;
|
|
}
|
|
|
|
static struct notifier_block ppc_fadump_block = {
|
|
.notifier_call = ppc_panic_fadump_handler,
|
|
.priority = INT_MAX, /* run early, to notify the firmware ASAP */
|
|
};
|
|
|
|
static struct notifier_block kernel_offset_notifier = {
|
|
.notifier_call = dump_kernel_offset,
|
|
};
|
|
|
|
static struct notifier_block ppc_panic_block = {
|
|
.notifier_call = ppc_panic_platform_handler,
|
|
.priority = INT_MIN, /* may not return; must be done last */
|
|
};
|
|
|
|
void __init setup_panic(void)
|
|
{
|
|
/* Hard-disables IRQs + deal with FW-assisted dump (fadump) */
|
|
atomic_notifier_chain_register(&panic_notifier_list,
|
|
&ppc_fadump_block);
|
|
|
|
if (IS_ENABLED(CONFIG_RANDOMIZE_BASE) && kaslr_offset() > 0)
|
|
atomic_notifier_chain_register(&panic_notifier_list,
|
|
&kernel_offset_notifier);
|
|
|
|
/* Low-level platform-specific routines that should run on panic */
|
|
if (ppc_md.panic)
|
|
atomic_notifier_chain_register(&panic_notifier_list,
|
|
&ppc_panic_block);
|
|
}
|
|
|
|
#ifdef CONFIG_CHECK_CACHE_COHERENCY
|
|
/*
|
|
* For platforms that have configurable cache-coherency. This function
|
|
* checks that the cache coherency setting of the kernel matches the setting
|
|
* left by the firmware, as indicated in the device tree. Since a mismatch
|
|
* will eventually result in DMA failures, we print * and error and call
|
|
* BUG() in that case.
|
|
*/
|
|
|
|
#define KERNEL_COHERENCY (!IS_ENABLED(CONFIG_NOT_COHERENT_CACHE))
|
|
|
|
static int __init check_cache_coherency(void)
|
|
{
|
|
struct device_node *np;
|
|
const void *prop;
|
|
bool devtree_coherency;
|
|
|
|
np = of_find_node_by_path("/");
|
|
prop = of_get_property(np, "coherency-off", NULL);
|
|
of_node_put(np);
|
|
|
|
devtree_coherency = prop ? false : true;
|
|
|
|
if (devtree_coherency != KERNEL_COHERENCY) {
|
|
printk(KERN_ERR
|
|
"kernel coherency:%s != device tree_coherency:%s\n",
|
|
KERNEL_COHERENCY ? "on" : "off",
|
|
devtree_coherency ? "on" : "off");
|
|
BUG();
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
late_initcall(check_cache_coherency);
|
|
#endif /* CONFIG_CHECK_CACHE_COHERENCY */
|
|
|
|
void ppc_printk_progress(char *s, unsigned short hex)
|
|
{
|
|
pr_info("%s\n", s);
|
|
}
|
|
|
|
static __init void print_system_info(void)
|
|
{
|
|
pr_info("-----------------------------------------------------\n");
|
|
pr_info("phys_mem_size = 0x%llx\n",
|
|
(unsigned long long)memblock_phys_mem_size());
|
|
|
|
pr_info("dcache_bsize = 0x%x\n", dcache_bsize);
|
|
pr_info("icache_bsize = 0x%x\n", icache_bsize);
|
|
|
|
pr_info("cpu_features = 0x%016lx\n", cur_cpu_spec->cpu_features);
|
|
pr_info(" possible = 0x%016lx\n",
|
|
(unsigned long)CPU_FTRS_POSSIBLE);
|
|
pr_info(" always = 0x%016lx\n",
|
|
(unsigned long)CPU_FTRS_ALWAYS);
|
|
pr_info("cpu_user_features = 0x%08x 0x%08x\n",
|
|
cur_cpu_spec->cpu_user_features,
|
|
cur_cpu_spec->cpu_user_features2);
|
|
pr_info("mmu_features = 0x%08x\n", cur_cpu_spec->mmu_features);
|
|
#ifdef CONFIG_PPC64
|
|
pr_info("firmware_features = 0x%016lx\n", powerpc_firmware_features);
|
|
#ifdef CONFIG_PPC_BOOK3S
|
|
pr_info("vmalloc start = 0x%lx\n", KERN_VIRT_START);
|
|
pr_info("IO start = 0x%lx\n", KERN_IO_START);
|
|
pr_info("vmemmap start = 0x%lx\n", (unsigned long)vmemmap);
|
|
#endif
|
|
#endif
|
|
|
|
if (!early_radix_enabled())
|
|
print_system_hash_info();
|
|
|
|
if (PHYSICAL_START > 0)
|
|
pr_info("physical_start = 0x%llx\n",
|
|
(unsigned long long)PHYSICAL_START);
|
|
pr_info("-----------------------------------------------------\n");
|
|
}
|
|
|
|
#ifdef CONFIG_SMP
|
|
static void __init smp_setup_pacas(void)
|
|
{
|
|
int cpu;
|
|
|
|
for_each_possible_cpu(cpu) {
|
|
if (cpu == smp_processor_id())
|
|
continue;
|
|
allocate_paca(cpu);
|
|
set_hard_smp_processor_id(cpu, cpu_to_phys_id[cpu]);
|
|
}
|
|
|
|
memblock_free(cpu_to_phys_id, nr_cpu_ids * sizeof(u32));
|
|
cpu_to_phys_id = NULL;
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Called into from start_kernel this initializes memblock, which is used
|
|
* to manage page allocation until mem_init is called.
|
|
*/
|
|
void __init setup_arch(char **cmdline_p)
|
|
{
|
|
kasan_init();
|
|
|
|
*cmdline_p = boot_command_line;
|
|
|
|
/* Set a half-reasonable default so udelay does something sensible */
|
|
loops_per_jiffy = 500000000 / HZ;
|
|
|
|
/* Unflatten the device-tree passed by prom_init or kexec */
|
|
unflatten_device_tree();
|
|
|
|
/*
|
|
* Initialize cache line/block info from device-tree (on ppc64) or
|
|
* just cputable (on ppc32).
|
|
*/
|
|
initialize_cache_info();
|
|
|
|
/* Initialize RTAS if available. */
|
|
rtas_initialize();
|
|
|
|
/* Check if we have an initrd provided via the device-tree. */
|
|
check_for_initrd();
|
|
|
|
/* Probe the machine type, establish ppc_md. */
|
|
probe_machine();
|
|
|
|
/* Setup panic notifier if requested by the platform. */
|
|
setup_panic();
|
|
|
|
/*
|
|
* Configure ppc_md.power_save (ppc32 only, 64-bit machines do
|
|
* it from their respective probe() function.
|
|
*/
|
|
setup_power_save();
|
|
|
|
/* Discover standard serial ports. */
|
|
find_legacy_serial_ports();
|
|
|
|
/* Register early console with the printk subsystem. */
|
|
register_early_udbg_console();
|
|
|
|
/* Setup the various CPU maps based on the device-tree. */
|
|
smp_setup_cpu_maps();
|
|
|
|
/* Initialize xmon. */
|
|
xmon_setup();
|
|
|
|
/* Check the SMT related command line arguments (ppc64). */
|
|
check_smt_enabled();
|
|
|
|
/* Parse memory topology */
|
|
mem_topology_setup();
|
|
|
|
/*
|
|
* Release secondary cpus out of their spinloops at 0x60 now that
|
|
* we can map physical -> logical CPU ids.
|
|
*
|
|
* Freescale Book3e parts spin in a loop provided by firmware,
|
|
* so smp_release_cpus() does nothing for them.
|
|
*/
|
|
#ifdef CONFIG_SMP
|
|
smp_setup_pacas();
|
|
|
|
/* On BookE, setup per-core TLB data structures. */
|
|
setup_tlb_core_data();
|
|
#endif
|
|
|
|
/* Print various info about the machine that has been gathered so far. */
|
|
print_system_info();
|
|
|
|
klp_init_thread_info(&init_task);
|
|
|
|
setup_initial_init_mm(_stext, _etext, _edata, _end);
|
|
|
|
mm_iommu_init(&init_mm);
|
|
irqstack_early_init();
|
|
exc_lvl_early_init();
|
|
emergency_stack_init();
|
|
|
|
mce_init();
|
|
smp_release_cpus();
|
|
|
|
initmem_init();
|
|
|
|
/*
|
|
* Reserve large chunks of memory for use by CMA for KVM and hugetlb. These must
|
|
* be called after initmem_init(), so that pageblock_order is initialised.
|
|
*/
|
|
kvm_cma_reserve();
|
|
gigantic_hugetlb_cma_reserve();
|
|
|
|
early_memtest(min_low_pfn << PAGE_SHIFT, max_low_pfn << PAGE_SHIFT);
|
|
|
|
if (ppc_md.setup_arch)
|
|
ppc_md.setup_arch();
|
|
|
|
setup_barrier_nospec();
|
|
setup_spectre_v2();
|
|
|
|
paging_init();
|
|
|
|
/* Initialize the MMU context management stuff. */
|
|
mmu_context_init();
|
|
|
|
/* Interrupt code needs to be 64K-aligned. */
|
|
if (IS_ENABLED(CONFIG_PPC64) && (unsigned long)_stext & 0xffff)
|
|
panic("Kernelbase not 64K-aligned (0x%lx)!\n",
|
|
(unsigned long)_stext);
|
|
}
|