mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-29 22:14:41 +08:00
32231a66b4
Move stuff used only by arch/sparc/kernel/* into arch/sparc/kernel/irq.h and into individual files in there (e.g. macros internal to sun4m_irq.c, etc.) Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
431 lines
9.6 KiB
C
431 lines
9.6 KiB
C
/* smp.c: Sparc SMP support.
|
|
*
|
|
* Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
|
|
* Copyright (C) 1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
|
|
* Copyright (C) 2004 Keith M Wesolowski (wesolows@foobazco.org)
|
|
*/
|
|
|
|
#include <asm/head.h>
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/threads.h>
|
|
#include <linux/smp.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/kernel_stat.h>
|
|
#include <linux/init.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/seq_file.h>
|
|
#include <linux/cache.h>
|
|
#include <linux/delay.h>
|
|
|
|
#include <asm/ptrace.h>
|
|
#include <asm/atomic.h>
|
|
|
|
#include <asm/irq.h>
|
|
#include <asm/page.h>
|
|
#include <asm/pgalloc.h>
|
|
#include <asm/pgtable.h>
|
|
#include <asm/oplib.h>
|
|
#include <asm/cacheflush.h>
|
|
#include <asm/tlbflush.h>
|
|
#include <asm/cpudata.h>
|
|
|
|
#include "irq.h"
|
|
|
|
int smp_num_cpus = 1;
|
|
volatile unsigned long cpu_callin_map[NR_CPUS] __initdata = {0,};
|
|
unsigned char boot_cpu_id = 0;
|
|
unsigned char boot_cpu_id4 = 0; /* boot_cpu_id << 2 */
|
|
int smp_activated = 0;
|
|
volatile int __cpu_number_map[NR_CPUS];
|
|
volatile int __cpu_logical_map[NR_CPUS];
|
|
|
|
cpumask_t cpu_online_map = CPU_MASK_NONE;
|
|
cpumask_t phys_cpu_present_map = CPU_MASK_NONE;
|
|
cpumask_t smp_commenced_mask = CPU_MASK_NONE;
|
|
|
|
/* The only guaranteed locking primitive available on all Sparc
|
|
* processors is 'ldstub [%reg + immediate], %dest_reg' which atomically
|
|
* places the current byte at the effective address into dest_reg and
|
|
* places 0xff there afterwards. Pretty lame locking primitive
|
|
* compared to the Alpha and the Intel no? Most Sparcs have 'swap'
|
|
* instruction which is much better...
|
|
*/
|
|
|
|
/* Used to make bitops atomic */
|
|
unsigned char bitops_spinlock = 0;
|
|
|
|
void __cpuinit smp_store_cpu_info(int id)
|
|
{
|
|
int cpu_node;
|
|
|
|
cpu_data(id).udelay_val = loops_per_jiffy;
|
|
|
|
cpu_find_by_mid(id, &cpu_node);
|
|
cpu_data(id).clock_tick = prom_getintdefault(cpu_node,
|
|
"clock-frequency", 0);
|
|
cpu_data(id).prom_node = cpu_node;
|
|
cpu_data(id).mid = cpu_get_hwmid(cpu_node);
|
|
|
|
if (cpu_data(id).mid < 0)
|
|
panic("No MID found for CPU%d at node 0x%08d", id, cpu_node);
|
|
}
|
|
|
|
void __init smp_cpus_done(unsigned int max_cpus)
|
|
{
|
|
extern void smp4m_smp_done(void);
|
|
extern void smp4d_smp_done(void);
|
|
unsigned long bogosum = 0;
|
|
int cpu, num;
|
|
|
|
for (cpu = 0, num = 0; cpu < NR_CPUS; cpu++)
|
|
if (cpu_online(cpu)) {
|
|
num++;
|
|
bogosum += cpu_data(cpu).udelay_val;
|
|
}
|
|
|
|
printk("Total of %d processors activated (%lu.%02lu BogoMIPS).\n",
|
|
num, bogosum/(500000/HZ),
|
|
(bogosum/(5000/HZ))%100);
|
|
|
|
switch(sparc_cpu_model) {
|
|
case sun4:
|
|
printk("SUN4\n");
|
|
BUG();
|
|
break;
|
|
case sun4c:
|
|
printk("SUN4C\n");
|
|
BUG();
|
|
break;
|
|
case sun4m:
|
|
smp4m_smp_done();
|
|
break;
|
|
case sun4d:
|
|
smp4d_smp_done();
|
|
break;
|
|
case sun4e:
|
|
printk("SUN4E\n");
|
|
BUG();
|
|
break;
|
|
case sun4u:
|
|
printk("SUN4U\n");
|
|
BUG();
|
|
break;
|
|
default:
|
|
printk("UNKNOWN!\n");
|
|
BUG();
|
|
break;
|
|
};
|
|
}
|
|
|
|
void cpu_panic(void)
|
|
{
|
|
printk("CPU[%d]: Returns from cpu_idle!\n", smp_processor_id());
|
|
panic("SMP bolixed\n");
|
|
}
|
|
|
|
struct linux_prom_registers smp_penguin_ctable __initdata = { 0 };
|
|
|
|
void smp_send_reschedule(int cpu)
|
|
{
|
|
/* See sparc64 */
|
|
}
|
|
|
|
void smp_send_stop(void)
|
|
{
|
|
}
|
|
|
|
void smp_flush_cache_all(void)
|
|
{
|
|
xc0((smpfunc_t) BTFIXUP_CALL(local_flush_cache_all));
|
|
local_flush_cache_all();
|
|
}
|
|
|
|
void smp_flush_tlb_all(void)
|
|
{
|
|
xc0((smpfunc_t) BTFIXUP_CALL(local_flush_tlb_all));
|
|
local_flush_tlb_all();
|
|
}
|
|
|
|
void smp_flush_cache_mm(struct mm_struct *mm)
|
|
{
|
|
if(mm->context != NO_CONTEXT) {
|
|
cpumask_t cpu_mask = mm->cpu_vm_mask;
|
|
cpu_clear(smp_processor_id(), cpu_mask);
|
|
if (!cpus_empty(cpu_mask))
|
|
xc1((smpfunc_t) BTFIXUP_CALL(local_flush_cache_mm), (unsigned long) mm);
|
|
local_flush_cache_mm(mm);
|
|
}
|
|
}
|
|
|
|
void smp_flush_tlb_mm(struct mm_struct *mm)
|
|
{
|
|
if(mm->context != NO_CONTEXT) {
|
|
cpumask_t cpu_mask = mm->cpu_vm_mask;
|
|
cpu_clear(smp_processor_id(), cpu_mask);
|
|
if (!cpus_empty(cpu_mask)) {
|
|
xc1((smpfunc_t) BTFIXUP_CALL(local_flush_tlb_mm), (unsigned long) mm);
|
|
if(atomic_read(&mm->mm_users) == 1 && current->active_mm == mm)
|
|
mm->cpu_vm_mask = cpumask_of_cpu(smp_processor_id());
|
|
}
|
|
local_flush_tlb_mm(mm);
|
|
}
|
|
}
|
|
|
|
void smp_flush_cache_range(struct vm_area_struct *vma, unsigned long start,
|
|
unsigned long end)
|
|
{
|
|
struct mm_struct *mm = vma->vm_mm;
|
|
|
|
if (mm->context != NO_CONTEXT) {
|
|
cpumask_t cpu_mask = mm->cpu_vm_mask;
|
|
cpu_clear(smp_processor_id(), cpu_mask);
|
|
if (!cpus_empty(cpu_mask))
|
|
xc3((smpfunc_t) BTFIXUP_CALL(local_flush_cache_range), (unsigned long) vma, start, end);
|
|
local_flush_cache_range(vma, start, end);
|
|
}
|
|
}
|
|
|
|
void smp_flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
|
|
unsigned long end)
|
|
{
|
|
struct mm_struct *mm = vma->vm_mm;
|
|
|
|
if (mm->context != NO_CONTEXT) {
|
|
cpumask_t cpu_mask = mm->cpu_vm_mask;
|
|
cpu_clear(smp_processor_id(), cpu_mask);
|
|
if (!cpus_empty(cpu_mask))
|
|
xc3((smpfunc_t) BTFIXUP_CALL(local_flush_tlb_range), (unsigned long) vma, start, end);
|
|
local_flush_tlb_range(vma, start, end);
|
|
}
|
|
}
|
|
|
|
void smp_flush_cache_page(struct vm_area_struct *vma, unsigned long page)
|
|
{
|
|
struct mm_struct *mm = vma->vm_mm;
|
|
|
|
if(mm->context != NO_CONTEXT) {
|
|
cpumask_t cpu_mask = mm->cpu_vm_mask;
|
|
cpu_clear(smp_processor_id(), cpu_mask);
|
|
if (!cpus_empty(cpu_mask))
|
|
xc2((smpfunc_t) BTFIXUP_CALL(local_flush_cache_page), (unsigned long) vma, page);
|
|
local_flush_cache_page(vma, page);
|
|
}
|
|
}
|
|
|
|
void smp_flush_tlb_page(struct vm_area_struct *vma, unsigned long page)
|
|
{
|
|
struct mm_struct *mm = vma->vm_mm;
|
|
|
|
if(mm->context != NO_CONTEXT) {
|
|
cpumask_t cpu_mask = mm->cpu_vm_mask;
|
|
cpu_clear(smp_processor_id(), cpu_mask);
|
|
if (!cpus_empty(cpu_mask))
|
|
xc2((smpfunc_t) BTFIXUP_CALL(local_flush_tlb_page), (unsigned long) vma, page);
|
|
local_flush_tlb_page(vma, page);
|
|
}
|
|
}
|
|
|
|
void smp_reschedule_irq(void)
|
|
{
|
|
set_need_resched();
|
|
}
|
|
|
|
void smp_flush_page_to_ram(unsigned long page)
|
|
{
|
|
/* Current theory is that those who call this are the one's
|
|
* who have just dirtied their cache with the pages contents
|
|
* in kernel space, therefore we only run this on local cpu.
|
|
*
|
|
* XXX This experiment failed, research further... -DaveM
|
|
*/
|
|
#if 1
|
|
xc1((smpfunc_t) BTFIXUP_CALL(local_flush_page_to_ram), page);
|
|
#endif
|
|
local_flush_page_to_ram(page);
|
|
}
|
|
|
|
void smp_flush_sig_insns(struct mm_struct *mm, unsigned long insn_addr)
|
|
{
|
|
cpumask_t cpu_mask = mm->cpu_vm_mask;
|
|
cpu_clear(smp_processor_id(), cpu_mask);
|
|
if (!cpus_empty(cpu_mask))
|
|
xc2((smpfunc_t) BTFIXUP_CALL(local_flush_sig_insns), (unsigned long) mm, insn_addr);
|
|
local_flush_sig_insns(mm, insn_addr);
|
|
}
|
|
|
|
extern unsigned int lvl14_resolution;
|
|
|
|
/* /proc/profile writes can call this, don't __init it please. */
|
|
static DEFINE_SPINLOCK(prof_setup_lock);
|
|
|
|
int setup_profiling_timer(unsigned int multiplier)
|
|
{
|
|
int i;
|
|
unsigned long flags;
|
|
|
|
/* Prevent level14 ticker IRQ flooding. */
|
|
if((!multiplier) || (lvl14_resolution / multiplier) < 500)
|
|
return -EINVAL;
|
|
|
|
spin_lock_irqsave(&prof_setup_lock, flags);
|
|
for_each_possible_cpu(i) {
|
|
load_profile_irq(i, lvl14_resolution / multiplier);
|
|
prof_multiplier(i) = multiplier;
|
|
}
|
|
spin_unlock_irqrestore(&prof_setup_lock, flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void __init smp_prepare_cpus(unsigned int max_cpus)
|
|
{
|
|
extern void __init smp4m_boot_cpus(void);
|
|
extern void __init smp4d_boot_cpus(void);
|
|
int i, cpuid, extra;
|
|
|
|
printk("Entering SMP Mode...\n");
|
|
|
|
extra = 0;
|
|
for (i = 0; !cpu_find_by_instance(i, NULL, &cpuid); i++) {
|
|
if (cpuid >= NR_CPUS)
|
|
extra++;
|
|
}
|
|
/* i = number of cpus */
|
|
if (extra && max_cpus > i - extra)
|
|
printk("Warning: NR_CPUS is too low to start all cpus\n");
|
|
|
|
smp_store_cpu_info(boot_cpu_id);
|
|
|
|
switch(sparc_cpu_model) {
|
|
case sun4:
|
|
printk("SUN4\n");
|
|
BUG();
|
|
break;
|
|
case sun4c:
|
|
printk("SUN4C\n");
|
|
BUG();
|
|
break;
|
|
case sun4m:
|
|
smp4m_boot_cpus();
|
|
break;
|
|
case sun4d:
|
|
smp4d_boot_cpus();
|
|
break;
|
|
case sun4e:
|
|
printk("SUN4E\n");
|
|
BUG();
|
|
break;
|
|
case sun4u:
|
|
printk("SUN4U\n");
|
|
BUG();
|
|
break;
|
|
default:
|
|
printk("UNKNOWN!\n");
|
|
BUG();
|
|
break;
|
|
};
|
|
}
|
|
|
|
/* Set this up early so that things like the scheduler can init
|
|
* properly. We use the same cpu mask for both the present and
|
|
* possible cpu map.
|
|
*/
|
|
void __init smp_setup_cpu_possible_map(void)
|
|
{
|
|
int instance, mid;
|
|
|
|
instance = 0;
|
|
while (!cpu_find_by_instance(instance, NULL, &mid)) {
|
|
if (mid < NR_CPUS) {
|
|
cpu_set(mid, phys_cpu_present_map);
|
|
cpu_set(mid, cpu_present_map);
|
|
}
|
|
instance++;
|
|
}
|
|
}
|
|
|
|
void __init smp_prepare_boot_cpu(void)
|
|
{
|
|
int cpuid = hard_smp_processor_id();
|
|
|
|
if (cpuid >= NR_CPUS) {
|
|
prom_printf("Serious problem, boot cpu id >= NR_CPUS\n");
|
|
prom_halt();
|
|
}
|
|
if (cpuid != 0)
|
|
printk("boot cpu id != 0, this could work but is untested\n");
|
|
|
|
current_thread_info()->cpu = cpuid;
|
|
cpu_set(cpuid, cpu_online_map);
|
|
cpu_set(cpuid, phys_cpu_present_map);
|
|
}
|
|
|
|
int __cpuinit __cpu_up(unsigned int cpu)
|
|
{
|
|
extern int __cpuinit smp4m_boot_one_cpu(int);
|
|
extern int __cpuinit smp4d_boot_one_cpu(int);
|
|
int ret=0;
|
|
|
|
switch(sparc_cpu_model) {
|
|
case sun4:
|
|
printk("SUN4\n");
|
|
BUG();
|
|
break;
|
|
case sun4c:
|
|
printk("SUN4C\n");
|
|
BUG();
|
|
break;
|
|
case sun4m:
|
|
ret = smp4m_boot_one_cpu(cpu);
|
|
break;
|
|
case sun4d:
|
|
ret = smp4d_boot_one_cpu(cpu);
|
|
break;
|
|
case sun4e:
|
|
printk("SUN4E\n");
|
|
BUG();
|
|
break;
|
|
case sun4u:
|
|
printk("SUN4U\n");
|
|
BUG();
|
|
break;
|
|
default:
|
|
printk("UNKNOWN!\n");
|
|
BUG();
|
|
break;
|
|
};
|
|
|
|
if (!ret) {
|
|
cpu_set(cpu, smp_commenced_mask);
|
|
while (!cpu_online(cpu))
|
|
mb();
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
void smp_bogo(struct seq_file *m)
|
|
{
|
|
int i;
|
|
|
|
for_each_online_cpu(i) {
|
|
seq_printf(m,
|
|
"Cpu%dBogo\t: %lu.%02lu\n",
|
|
i,
|
|
cpu_data(i).udelay_val/(500000/HZ),
|
|
(cpu_data(i).udelay_val/(5000/HZ))%100);
|
|
}
|
|
}
|
|
|
|
void smp_info(struct seq_file *m)
|
|
{
|
|
int i;
|
|
|
|
seq_printf(m, "State:\n");
|
|
for_each_online_cpu(i)
|
|
seq_printf(m, "CPU%d\t\t: online\n", i);
|
|
}
|