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Diffstat (limited to 'arch/sparc/kernel/smp_32.c')
-rw-r--r--arch/sparc/kernel/smp_32.c121
1 files changed, 85 insertions, 36 deletions
diff --git a/arch/sparc/kernel/smp_32.c b/arch/sparc/kernel/smp_32.c
index 91c10fb70858..21b125341bf7 100644
--- a/arch/sparc/kernel/smp_32.c
+++ b/arch/sparc/kernel/smp_32.c
@@ -37,8 +37,6 @@
#include "irq.h"
volatile unsigned long cpu_callin_map[NR_CPUS] __cpuinitdata = {0,};
-unsigned char boot_cpu_id = 0;
-unsigned char boot_cpu_id4 = 0; /* boot_cpu_id << 2 */
cpumask_t smp_commenced_mask = CPU_MASK_NONE;
@@ -53,6 +51,7 @@ cpumask_t smp_commenced_mask = CPU_MASK_NONE;
void __cpuinit smp_store_cpu_info(int id)
{
int cpu_node;
+ int mid;
cpu_data(id).udelay_val = loops_per_jiffy;
@@ -60,10 +59,13 @@ void __cpuinit smp_store_cpu_info(int id)
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);
+ 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);
+ if (mid < 0) {
+ printk(KERN_NOTICE "No MID found for CPU%d at node 0x%08d", id, cpu_node);
+ mid = 0;
+ }
+ cpu_data(id).mid = mid;
}
void __init smp_cpus_done(unsigned int max_cpus)
@@ -112,7 +114,7 @@ void __init smp_cpus_done(unsigned int max_cpus)
printk("UNKNOWN!\n");
BUG();
break;
- };
+ }
}
void cpu_panic(void)
@@ -125,13 +127,58 @@ struct linux_prom_registers smp_penguin_ctable __cpuinitdata = { 0 };
void smp_send_reschedule(int cpu)
{
- /* See sparc64 */
+ /*
+ * CPU model dependent way of implementing IPI generation targeting
+ * a single CPU. The trap handler needs only to do trap entry/return
+ * to call schedule.
+ */
+ BTFIXUP_CALL(smp_ipi_resched)(cpu);
}
void smp_send_stop(void)
{
}
+void arch_send_call_function_single_ipi(int cpu)
+{
+ /* trigger one IPI single call on one CPU */
+ BTFIXUP_CALL(smp_ipi_single)(cpu);
+}
+
+void arch_send_call_function_ipi_mask(const struct cpumask *mask)
+{
+ int cpu;
+
+ /* trigger IPI mask call on each CPU */
+ for_each_cpu(cpu, mask)
+ BTFIXUP_CALL(smp_ipi_mask_one)(cpu);
+}
+
+void smp_resched_interrupt(void)
+{
+ irq_enter();
+ scheduler_ipi();
+ local_cpu_data().irq_resched_count++;
+ irq_exit();
+ /* re-schedule routine called by interrupt return code. */
+}
+
+void smp_call_function_single_interrupt(void)
+{
+ irq_enter();
+ generic_smp_call_function_single_interrupt();
+ local_cpu_data().irq_call_count++;
+ irq_exit();
+}
+
+void smp_call_function_interrupt(void)
+{
+ irq_enter();
+ generic_smp_call_function_interrupt();
+ local_cpu_data().irq_call_count++;
+ irq_exit();
+}
+
void smp_flush_cache_all(void)
{
xc0((smpfunc_t) BTFIXUP_CALL(local_flush_cache_all));
@@ -147,9 +194,10 @@ void smp_flush_tlb_all(void)
void smp_flush_cache_mm(struct mm_struct *mm)
{
if(mm->context != NO_CONTEXT) {
- cpumask_t cpu_mask = *mm_cpumask(mm);
- cpu_clear(smp_processor_id(), cpu_mask);
- if (!cpus_empty(cpu_mask))
+ cpumask_t cpu_mask;
+ cpumask_copy(&cpu_mask, mm_cpumask(mm));
+ cpumask_clear_cpu(smp_processor_id(), &cpu_mask);
+ if (!cpumask_empty(&cpu_mask))
xc1((smpfunc_t) BTFIXUP_CALL(local_flush_cache_mm), (unsigned long) mm);
local_flush_cache_mm(mm);
}
@@ -158,9 +206,10 @@ void smp_flush_cache_mm(struct mm_struct *mm)
void smp_flush_tlb_mm(struct mm_struct *mm)
{
if(mm->context != NO_CONTEXT) {
- cpumask_t cpu_mask = *mm_cpumask(mm);
- cpu_clear(smp_processor_id(), cpu_mask);
- if (!cpus_empty(cpu_mask)) {
+ cpumask_t cpu_mask;
+ cpumask_copy(&cpu_mask, mm_cpumask(mm));
+ cpumask_clear_cpu(smp_processor_id(), &cpu_mask);
+ if (!cpumask_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)
cpumask_copy(mm_cpumask(mm),
@@ -176,9 +225,10 @@ void smp_flush_cache_range(struct vm_area_struct *vma, unsigned long start,
struct mm_struct *mm = vma->vm_mm;
if (mm->context != NO_CONTEXT) {
- cpumask_t cpu_mask = *mm_cpumask(mm);
- cpu_clear(smp_processor_id(), cpu_mask);
- if (!cpus_empty(cpu_mask))
+ cpumask_t cpu_mask;
+ cpumask_copy(&cpu_mask, mm_cpumask(mm));
+ cpumask_clear_cpu(smp_processor_id(), &cpu_mask);
+ if (!cpumask_empty(&cpu_mask))
xc3((smpfunc_t) BTFIXUP_CALL(local_flush_cache_range), (unsigned long) vma, start, end);
local_flush_cache_range(vma, start, end);
}
@@ -190,9 +240,10 @@ void smp_flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
struct mm_struct *mm = vma->vm_mm;
if (mm->context != NO_CONTEXT) {
- cpumask_t cpu_mask = *mm_cpumask(mm);
- cpu_clear(smp_processor_id(), cpu_mask);
- if (!cpus_empty(cpu_mask))
+ cpumask_t cpu_mask;
+ cpumask_copy(&cpu_mask, mm_cpumask(mm));
+ cpumask_clear_cpu(smp_processor_id(), &cpu_mask);
+ if (!cpumask_empty(&cpu_mask))
xc3((smpfunc_t) BTFIXUP_CALL(local_flush_tlb_range), (unsigned long) vma, start, end);
local_flush_tlb_range(vma, start, end);
}
@@ -203,9 +254,10 @@ 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_cpumask(mm);
- cpu_clear(smp_processor_id(), cpu_mask);
- if (!cpus_empty(cpu_mask))
+ cpumask_t cpu_mask;
+ cpumask_copy(&cpu_mask, mm_cpumask(mm));
+ cpumask_clear_cpu(smp_processor_id(), &cpu_mask);
+ if (!cpumask_empty(&cpu_mask))
xc2((smpfunc_t) BTFIXUP_CALL(local_flush_cache_page), (unsigned long) vma, page);
local_flush_cache_page(vma, page);
}
@@ -216,19 +268,15 @@ 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_cpumask(mm);
- cpu_clear(smp_processor_id(), cpu_mask);
- if (!cpus_empty(cpu_mask))
+ cpumask_t cpu_mask;
+ cpumask_copy(&cpu_mask, mm_cpumask(mm));
+ cpumask_clear_cpu(smp_processor_id(), &cpu_mask);
+ if (!cpumask_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
@@ -245,9 +293,10 @@ void smp_flush_page_to_ram(unsigned long page)
void smp_flush_sig_insns(struct mm_struct *mm, unsigned long insn_addr)
{
- cpumask_t cpu_mask = *mm_cpumask(mm);
- cpu_clear(smp_processor_id(), cpu_mask);
- if (!cpus_empty(cpu_mask))
+ cpumask_t cpu_mask;
+ cpumask_copy(&cpu_mask, mm_cpumask(mm));
+ cpumask_clear_cpu(smp_processor_id(), &cpu_mask);
+ if (!cpumask_empty(&cpu_mask))
xc2((smpfunc_t) BTFIXUP_CALL(local_flush_sig_insns), (unsigned long) mm, insn_addr);
local_flush_sig_insns(mm, insn_addr);
}
@@ -325,7 +374,7 @@ void __init smp_prepare_cpus(unsigned int max_cpus)
printk("UNKNOWN!\n");
BUG();
break;
- };
+ }
}
/* Set this up early so that things like the scheduler can init
@@ -398,10 +447,10 @@ int __cpuinit __cpu_up(unsigned int cpu)
printk("UNKNOWN!\n");
BUG();
break;
- };
+ }
if (!ret) {
- cpu_set(cpu, smp_commenced_mask);
+ cpumask_set_cpu(cpu, &smp_commenced_mask);
while (!cpu_online(cpu))
mb();
}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.