diff options
Diffstat (limited to 'include/asm-x86/system.h')
| -rw-r--r-- | include/asm-x86/system.h | 26 |
1 files changed, 24 insertions, 2 deletions
diff --git a/include/asm-x86/system.h b/include/asm-x86/system.h index ba3403f1d020..8a37dad38bc0 100644 --- a/include/asm-x86/system.h +++ b/include/asm-x86/system.h @@ -2,8 +2,12 @@ #define _ASM_X86_SYSTEM_H_ #include <asm/asm.h> +#include <asm/segment.h> +#include <asm/cpufeature.h> +#include <asm/cmpxchg.h> #include <linux/kernel.h> +#include <linux/irqflags.h> #ifdef CONFIG_X86_32 #define AT_VECTOR_SIZE_ARCH 2 /* entries in ARCH_DLINFO */ @@ -34,7 +38,10 @@ extern struct task_struct *FASTCALL(__switch_to(struct task_struct *prev, "2" (prev), "d" (next)); \ } while (0) -# include "system_32.h" +/* + * disable hlt during certain critical i/o operations + */ +#define HAVE_DISABLE_HLT #else #define __SAVE(reg, offset) "movq %%" #reg ",(14-" #offset ")*8(%%rsp)\n\t" #define __RESTORE(reg, offset) "movq (14-" #offset ")*8(%%rsp),%%" #reg "\n\t" @@ -69,7 +76,6 @@ extern struct task_struct *FASTCALL(__switch_to(struct task_struct *prev, [thread_info] "i" (offsetof(struct task_struct, stack)), \ [pda_pcurrent] "i" (offsetof(struct x8664_pda, pcurrent)) \ : "memory", "cc" __EXTRA_CLOBBER) -# include "system_64.h" #endif #ifdef __KERNEL__ @@ -236,6 +242,22 @@ static inline void native_wbinvd(void) #define write_cr4(x) (native_write_cr4(x)) #define wbinvd() (native_wbinvd()) +#ifdef CONFIG_X86_64 + +static inline unsigned long read_cr8(void) +{ + unsigned long cr8; + asm volatile("movq %%cr8,%0" : "=r" (cr8)); + return cr8; +} + +static inline void write_cr8(unsigned long val) +{ + asm volatile("movq %0,%%cr8" :: "r" (val) : "memory"); +} + +#endif + /* Clear the 'TS' bit */ #define clts() (native_clts()) |