diff options
Diffstat (limited to 'arch/x86/cpu/interrupts.c')
| -rw-r--r-- | arch/x86/cpu/interrupts.c | 68 | 
1 files changed, 2 insertions, 66 deletions
| diff --git a/arch/x86/cpu/interrupts.c b/arch/x86/cpu/interrupts.c index 43ec3f8b0..e7887152f 100644 --- a/arch/x86/cpu/interrupts.c +++ b/arch/x86/cpu/interrupts.c @@ -28,6 +28,8 @@   */  #include <common.h> +#include <asm/cache.h> +#include <asm/control_regs.h>  #include <asm/interrupt.h>  #include <asm/io.h>  #include <asm/processor-flags.h> @@ -41,72 +43,6 @@  	"pushl $"#x"\n" \  	"jmp irq_common_entry\n" -/* - * Volatile isn't enough to prevent the compiler from reordering the - * read/write functions for the control registers and messing everything up. - * A memory clobber would solve the problem, but would prevent reordering of - * all loads stores around it, which can hurt performance. Solution is to - * use a variable and mimic reads and writes to it to enforce serialisation - */ -static unsigned long __force_order; - -static inline unsigned long read_cr0(void) -{ -	unsigned long val; -	asm volatile("mov %%cr0,%0\n\t" : "=r" (val), "=m" (__force_order)); -	return val; -} - -static inline unsigned long read_cr2(void) -{ -	unsigned long val; -	asm volatile("mov %%cr2,%0\n\t" : "=r" (val), "=m" (__force_order)); -	return val; -} - -static inline unsigned long read_cr3(void) -{ -	unsigned long val; -	asm volatile("mov %%cr3,%0\n\t" : "=r" (val), "=m" (__force_order)); -	return val; -} - -static inline unsigned long read_cr4(void) -{ -	unsigned long val; -	asm volatile("mov %%cr4,%0\n\t" : "=r" (val), "=m" (__force_order)); -	return val; -} - -static inline unsigned long get_debugreg(int regno) -{ -	unsigned long val = 0;	/* Damn you, gcc! */ - -	switch (regno) { -	case 0: -		asm("mov %%db0, %0" : "=r" (val)); -		break; -	case 1: -		asm("mov %%db1, %0" : "=r" (val)); -		break; -	case 2: -		asm("mov %%db2, %0" : "=r" (val)); -		break; -	case 3: -		asm("mov %%db3, %0" : "=r" (val)); -		break; -	case 6: -		asm("mov %%db6, %0" : "=r" (val)); -		break; -	case 7: -		asm("mov %%db7, %0" : "=r" (val)); -		break; -	default: -		val = 0; -	} -	return val; -} -  void dump_regs(struct irq_regs *regs)  {  	unsigned long cr0 = 0L, cr2 = 0L, cr3 = 0L, cr4 = 0L; |