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Diffstat (limited to 'include/asm-i386/system.h')
-rw-r--r--include/asm-i386/system.h28
1 files changed, 25 insertions, 3 deletions
diff --git a/include/asm-i386/system.h b/include/asm-i386/system.h
index 3db717a244f0..8048a5e018cd 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() \
({ \