3/8 Move sensitive system definitions into the sub-arch layer
PATCH 1/1 3/8 Move sensitive system definitions into the sub-arch layer
i386 Transparent Paravirtualization Subarch Patch #3
This change encapsulates privileged control register and flags accessors into the sub-architecture layer. The goal is a clean, uniform interface that may be redefined on new sub-architectures of i386.
Diffs against: linux-2.6.13-rc4-mm1
include/asm-i386/system.h +1 -60
@@ -100,56 +100,8 @@#define savesegment (seg, value) \ asm volatile("mov %%" #seg ",%0":"=rm" (value)) -/* -* Clear and set 'TS' bit respectively -*/ -#define clts () __asm__ __volatile__ ("clts") -#define read_cr0 () ({ \ - unsigned int __dummy; \ - __asm__ __volatile__( \ - "movl %%cr0,%0\n\t" \ - :"=r" (__dummy)); \ - __dummy; \ -}) -#define write_cr0 (x) \ - __asm__ __volatile__("movl %0,%%cr0": :"r" (x)); - -#define read_cr2 () ({ \ - unsigned int __dummy; \ - __asm__ __volatile__( \ - "movl %%cr2,%0\n\t" \ - :"=r" (__dummy)); \ - __dummy; \ -}) -#define write_cr2 (x) \ - __asm__ __volatile__("movl %0,%%cr2": :"r" (x)); - -#define read_cr3 () ({ \ - unsigned int __dummy; \ - __asm__ ( \ - "movl %%cr3,%0\n\t" \ - :"=r" (__dummy)); \ - __dummy; \ -}) -#define write_cr3 (x) \ - __asm__ __volatile__("movl %0,%%cr3": :"r" (x)); - -#define read_cr4 () ({ \ - unsigned int __dummy; \ - __asm__( \ - "movl %%cr4,%0\n\t" \ - :"=r" (__dummy)); \ - __dummy; \ -}) -#define write_cr4 (x) \ - __asm__ __volatile__("movl %0,%%cr4": :"r" (x)); -#define stts () write_cr0(8 | read_cr0()) -#endif /* __KERNEL__ */ -#define wbinvd () \ - __asm__ __volatile__ ("wbinvd": : :"memory"); -static inline unsigned long get_limit (unsigned long segment) {unsigned long __limit;
@@ -459,15 +411,7 @@#define set_wmb (var, value) do { var = value; wmb(); } while (0) -/* interrupt control.. */ -#define local_save_flags(x) do { typecheck(unsigned long,x); __asm__ __volatile__("pushfl ; popl %0":"=g" (x): /* no input */); } while (0) -#define local_irq_restore(x) do { typecheck(unsigned long,x); __asm__ __volatile__("pushl %0 ; popfl": /* no output */ :"g" (x):"memory", "cc"); } while (0) -#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 */ -#define halt () __asm__ __volatile__("hlt": : :"memory") +#include <mach_system.h> #define irqs_disabled () \ ({ \
@@ -476,9 +420,6 @@ !(flags & (1 <<9 )); \ }) -/* For spinlocks etc */ -#define local_irq_save(x) __asm__ __volatile__("pushfl ; popl %0 ; cli":"=g" (x): /* no input */ :"memory") -/* * disable hlt during certain critical i/o operations */
include/asm-i386/mach-default/mach_system.h +76 -0
76 lines not on this page · raw message
Quoted 5 lines · * Zachary Amsden ([email protected]) wrote:
i386 Transparent Paravirtualization Subarch Patch #3
This change encapsulates privileged control register and flags accessors into the sub-architecture layer. The goal is a clean, uniform interface that may be redefined on new sub-architectures of i386.
I had cheated on this on and the io insn's and pushed the whole thing to subarch. That's only from lack of time, so I'll revisit this one tomorrow.
thanks,
-chris