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authorJeremy Fitzhardinge <jeremy@goop.org>2007-05-15 01:41:59 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-05-15 08:54:01 -0700
commit6a3ee3d5529c5e66aedf91401bfac65c61998639 (patch)
treef891535372b761ff79b343ee6e6c027ad03a6be6 /arch
parent297d9c035edd04327fedc0d1da27c2b112b66fcc (diff)
downloadop-kernel-dev-6a3ee3d5529c5e66aedf91401bfac65c61998639.zip
op-kernel-dev-6a3ee3d5529c5e66aedf91401bfac65c61998639.tar.gz
i386: fix voyager build
This adds an smp_ops for voyager, and hooks things up appropriately. This is the first baby-step to making subarch runtime switchable. Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com> Cc: James Bottomley <James.Bottomley@HansenPartnership.com> Cc: Eric W. Biederman <ebiederm@xmission.com> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/i386/mach-voyager/voyager_smp.c106
1 files changed, 41 insertions, 65 deletions
diff --git a/arch/i386/mach-voyager/voyager_smp.c b/arch/i386/mach-voyager/voyager_smp.c
index 50d9c52..b87f854 100644
--- a/arch/i386/mach-voyager/voyager_smp.c
+++ b/arch/i386/mach-voyager/voyager_smp.c
@@ -27,7 +27,6 @@
#include <asm/pgalloc.h>
#include <asm/tlbflush.h>
#include <asm/arch_hooks.h>
-#include <asm/pda.h>
/* TLB state -- visible externally, indexed physically */
DEFINE_PER_CPU(struct tlb_state, cpu_tlbstate) ____cacheline_aligned = { &init_mm, 0 };
@@ -422,7 +421,7 @@ find_smp_config(void)
VOYAGER_SUS_IN_CONTROL_PORT);
current_thread_info()->cpu = boot_cpu_id;
- write_pda(cpu_number, boot_cpu_id);
+ x86_write_percpu(cpu_number, boot_cpu_id);
}
/*
@@ -435,7 +434,7 @@ smp_store_cpu_info(int id)
*c = boot_cpu_data;
- identify_cpu(c);
+ identify_secondary_cpu(c);
}
/* set up the trampoline and return the physical address of the code */
@@ -459,7 +458,7 @@ start_secondary(void *unused)
/* external functions not defined in the headers */
extern void calibrate_delay(void);
- secondary_cpu_init();
+ cpu_init();
/* OK, we're in the routine */
ack_CPI(VIC_CPU_BOOT_CPI);
@@ -572,7 +571,9 @@ do_boot_cpu(__u8 cpu)
/* init_tasks (in sched.c) is indexed logically */
stack_start.esp = (void *) idle->thread.esp;
- init_gdt(cpu, idle);
+ init_gdt(cpu);
+ per_cpu(current_task, cpu) = idle;
+ early_gdt_descr.address = (unsigned long)get_cpu_gdt_table(cpu);
irq_ctx_init(cpu);
/* Note: Don't modify initial ss override */
@@ -859,8 +860,8 @@ smp_invalidate_interrupt(void)
/* This routine is called with a physical cpu mask */
static void
-flush_tlb_others (unsigned long cpumask, struct mm_struct *mm,
- unsigned long va)
+voyager_flush_tlb_others (unsigned long cpumask, struct mm_struct *mm,
+ unsigned long va)
{
int stuck = 50000;
@@ -912,7 +913,7 @@ flush_tlb_current_task(void)
cpu_mask = cpus_addr(mm->cpu_vm_mask)[0] & ~(1 << smp_processor_id());
local_flush_tlb();
if (cpu_mask)
- flush_tlb_others(cpu_mask, mm, FLUSH_ALL);
+ voyager_flush_tlb_others(cpu_mask, mm, FLUSH_ALL);
preempt_enable();
}
@@ -934,7 +935,7 @@ flush_tlb_mm (struct mm_struct * mm)
leave_mm(smp_processor_id());
}
if (cpu_mask)
- flush_tlb_others(cpu_mask, mm, FLUSH_ALL);
+ voyager_flush_tlb_others(cpu_mask, mm, FLUSH_ALL);
preempt_enable();
}
@@ -955,7 +956,7 @@ void flush_tlb_page(struct vm_area_struct * vma, unsigned long va)
}
if (cpu_mask)
- flush_tlb_others(cpu_mask, mm, va);
+ voyager_flush_tlb_others(cpu_mask, mm, va);
preempt_enable();
}
@@ -1044,10 +1045,12 @@ smp_call_function_interrupt(void)
}
static int
-__smp_call_function_mask (void (*func) (void *info), void *info, int retry,
- int wait, __u32 mask)
+voyager_smp_call_function_mask (cpumask_t cpumask,
+ void (*func) (void *info), void *info,
+ int wait)
{
struct call_data_struct data;
+ u32 mask = cpus_addr(cpumask)[0];
mask &= ~(1<<smp_processor_id());
@@ -1083,47 +1086,6 @@ __smp_call_function_mask (void (*func) (void *info), void *info, int retry,
return 0;
}
-/* Call this function on all CPUs using the function_interrupt above
- <func> The function to run. This must be fast and non-blocking.
- <info> An arbitrary pointer to pass to the function.
- <retry> If true, keep retrying until ready.
- <wait> If true, wait until function has completed on other CPUs.
- [RETURNS] 0 on success, else a negative status code. Does not return until
- remote CPUs are nearly ready to execute <<func>> or are or have executed.
-*/
-int
-smp_call_function(void (*func) (void *info), void *info, int retry,
- int wait)
-{
- __u32 mask = cpus_addr(cpu_online_map)[0];
-
- return __smp_call_function_mask(func, info, retry, wait, mask);
-}
-EXPORT_SYMBOL(smp_call_function);
-
-/*
- * smp_call_function_single - Run a function on another CPU
- * @func: The function to run. This must be fast and non-blocking.
- * @info: An arbitrary pointer to pass to the function.
- * @nonatomic: Currently unused.
- * @wait: If true, wait until function has completed on other CPUs.
- *
- * Retrurns 0 on success, else a negative status code.
- *
- * Does not return until the remote CPU is nearly ready to execute <func>
- * or is or has executed.
- */
-
-int
-smp_call_function_single(int cpu, void (*func) (void *info), void *info,
- int nonatomic, int wait)
-{
- __u32 mask = 1 << cpu;
-
- return __smp_call_function_mask(func, info, nonatomic, wait, mask);
-}
-EXPORT_SYMBOL(smp_call_function_single);
-
/* Sorry about the name. In an APIC based system, the APICs
* themselves are programmed to send a timer interrupt. This is used
* by linux to reschedule the processor. Voyager doesn't have this,
@@ -1237,8 +1199,8 @@ smp_alloc_memory(void)
}
/* send a reschedule CPI to one CPU by physical CPU number*/
-void
-smp_send_reschedule(int cpu)
+static void
+voyager_smp_send_reschedule(int cpu)
{
send_one_CPI(cpu, VIC_RESCHEDULE_CPI);
}
@@ -1267,8 +1229,8 @@ safe_smp_processor_id(void)
}
/* broadcast a halt to all other CPUs */
-void
-smp_send_stop(void)
+static void
+voyager_smp_send_stop(void)
{
smp_call_function(smp_stop_cpu_function, NULL, 1, 1);
}
@@ -1930,23 +1892,26 @@ smp_voyager_power_off(void *dummy)
smp_stop_cpu_function(NULL);
}
-void __init
-smp_prepare_cpus(unsigned int max_cpus)
+static void __init
+voyager_smp_prepare_cpus(unsigned int max_cpus)
{
/* FIXME: ignore max_cpus for now */
smp_boot_cpus();
}
-void __devinit smp_prepare_boot_cpu(void)
+static void __devinit voyager_smp_prepare_boot_cpu(void)
{
+ init_gdt(smp_processor_id());
+ switch_to_new_gdt();
+
cpu_set(smp_processor_id(), cpu_online_map);
cpu_set(smp_processor_id(), cpu_callout_map);
cpu_set(smp_processor_id(), cpu_possible_map);
cpu_set(smp_processor_id(), cpu_present_map);
}
-int __devinit
-__cpu_up(unsigned int cpu)
+static int __devinit
+voyager_cpu_up(unsigned int cpu)
{
/* This only works at boot for x86. See "rewrite" above. */
if (cpu_isset(cpu, smp_commenced_mask))
@@ -1962,8 +1927,8 @@ __cpu_up(unsigned int cpu)
return 0;
}
-void __init
-smp_cpus_done(unsigned int max_cpus)
+static void __init
+voyager_smp_cpus_done(unsigned int max_cpus)
{
zap_low_mappings();
}
@@ -1972,5 +1937,16 @@ void __init
smp_setup_processor_id(void)
{
current_thread_info()->cpu = hard_smp_processor_id();
- write_pda(cpu_number, hard_smp_processor_id());
+ x86_write_percpu(cpu_number, hard_smp_processor_id());
}
+
+struct smp_ops smp_ops = {
+ .smp_prepare_boot_cpu = voyager_smp_prepare_boot_cpu,
+ .smp_prepare_cpus = voyager_smp_prepare_cpus,
+ .cpu_up = voyager_cpu_up,
+ .smp_cpus_done = voyager_smp_cpus_done,
+
+ .smp_send_stop = voyager_smp_send_stop,
+ .smp_send_reschedule = voyager_smp_send_reschedule,
+ .smp_call_function_mask = voyager_smp_call_function_mask,
+};
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