diff options
| author | Ravikiran G Thirumalai <kiran@scalex86.org> | 2006-01-11 22:46:18 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-01-12 04:05:01 +0100 |
| commit | 79f12614a6537cc3ac9ca4d1ea26f6e4f4a34aee (patch) | |
| tree | 25167c8862ad7733c7e044b0aad67e4291a0681b /include/asm-x86_64 | |
| parent | [PATCH] x86_64: Inclusion of ScaleMP vSMP architecture patches - vsmp_align (diff) | |
| download | linux-79f12614a6537cc3ac9ca4d1ea26f6e4f4a34aee.tar.xz linux-79f12614a6537cc3ac9ca4d1ea26f6e4f4a34aee.zip | |
[PATCH] x86_64: Inclusion of ScaleMP vSMP architecture patches - vsmp_arch
Introduce vSMP arch to the kernel.
This patch:
1. Adds CONFIG_X86_VSMP
2. Adds machine specific macros for local_irq_disabled, local_irq_enabled
and irqs_disabled
3. Writes to the vSMP CTL device to indicate kernel compiled with CONFIG_VSMP
Signed-off-by: Ravikiran Thirumalai <kiran@scalemp.com>
Signed-off-by: Shai Fultheim <shai@scalemp.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/asm-x86_64')
| -rw-r--r-- | include/asm-x86_64/system.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/include/asm-x86_64/system.h b/include/asm-x86_64/system.h index 80272190570e..38c1e8a69c9c 100644 --- a/include/asm-x86_64/system.h +++ b/include/asm-x86_64/system.h @@ -326,8 +326,25 @@ static inline unsigned long __cmpxchg(volatile void *ptr, unsigned long old, /* interrupt control.. */ #define local_save_flags(x) do { warn_if_not_ulong(x); __asm__ __volatile__("# save_flags \n\t pushfq ; popq %q0":"=g" (x): /* no input */ :"memory"); } while (0) #define local_irq_restore(x) __asm__ __volatile__("# restore_flags \n\t pushq %0 ; popfq": /* no output */ :"g" (x):"memory", "cc") + +#ifdef CONFIG_X86_VSMP +/* Interrupt control for VSMP architecture */ +#define local_irq_disable() do { unsigned long flags; local_save_flags(flags); local_irq_restore((flags & ~(1 << 9)) | (1 << 18)); } while (0) +#define local_irq_enable() do { unsigned long flags; local_save_flags(flags); local_irq_restore((flags | (1 << 9)) & ~(1 << 18)); } while (0) + +#define irqs_disabled() \ +({ \ + unsigned long flags; \ + local_save_flags(flags); \ + (flags & (1<<18)) || !(flags & (1<<9)); \ +}) + +/* For spinlocks etc */ +#define local_irq_save(x) do { local_save_flags(x); local_irq_restore((x & ~(1 << 9)) | (1 << 18)); } while (0) +#else /* CONFIG_X86_VSMP */ #define local_irq_disable() __asm__ __volatile__("cli": : :"memory") #define local_irq_enable() __asm__ __volatile__("sti": : :"memory") + /* used in the idle loop; sti takes one instruction cycle to complete */ #define safe_halt() __asm__ __volatile__("sti; hlt": : :"memory") /* used when interrupts are already enabled or to shutdown the processor */ @@ -342,6 +359,7 @@ static inline unsigned long __cmpxchg(volatile void *ptr, unsigned long old, /* For spinlocks etc */ #define local_irq_save(x) do { warn_if_not_ulong(x); __asm__ __volatile__("# local_irq_save \n\t pushfq ; popq %0 ; cli":"=g" (x): /* no input */ :"memory"); } while (0) +#endif void cpu_idle_wait(void); |