diff options
Diffstat (limited to 'include/asm-i386/system.h')
| -rw-r--r-- | include/asm-i386/system.h | 28 |
1 files changed, 25 insertions, 3 deletions
diff --git a/include/asm-i386/system.h b/include/asm-i386/system.h index 3db717a244f..8048a5e018c 100644 --- a/include/asm-i386/system.h +++ b/include/asm-i386/system.h @@ -107,13 +107,33 @@ static inline unsigned long _get_base(char * addr) #define clts() __asm__ __volatile__ ("clts") #define read_cr0() ({ \ unsigned int __dummy; \ - __asm__( \ + __asm__ __volatile__( \ "movl %%cr0,%0\n\t" \ :"=r" (__dummy)); \ __dummy; \ }) #define write_cr0(x) \ - __asm__("movl %0,%%cr0": :"r" (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; \ @@ -123,7 +143,7 @@ static inline unsigned long _get_base(char * addr) __dummy; \ }) #define write_cr4(x) \ - __asm__("movl %0,%%cr4": :"r" (x)); + __asm__ __volatile__("movl %0,%%cr4": :"r" (x)); #define stts() write_cr0(8 | read_cr0()) #endif /* __KERNEL__ */ @@ -447,6 +467,8 @@ struct alt_instr { #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") #define irqs_disabled() \ ({ \ |