x86: relocate get/set debugreg fcns to include/asm/debugreg.

[mv-sheeva.git] / arch / x86 / include / asm / debugreg.h

diff --git a/arch/x86/include/asm/debugreg.h b/arch/x86/include/asm/debugreg.h
index b903d5ea394111edc965c351103953a62b5357a6..2d91580bf2288d46076a5a22beb96895ee31836d 100644 (file)
--- a/arch/x86/include/asm/debugreg.h
+++ b/arch/x86/include/asm/debugreg.h
@@ -78,8 +78,75 @@
  */
 #ifdef __KERNEL__
 
+#include <linux/bug.h>
+
 DECLARE_PER_CPU(unsigned long, cpu_dr7);
 
+#ifndef CONFIG_PARAVIRT
+/*
+ * These special macros can be used to get or set a debugging register
+ */
+#define get_debugreg(var, register)                            \
+       (var) = native_get_debugreg(register)
+#define set_debugreg(value, register)                          \
+       native_set_debugreg(register, value)
+#endif
+
+static inline unsigned long native_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:
+               BUG();
+       }
+       return val;
+}
+
+static inline void native_set_debugreg(int regno, unsigned long value)
+{
+       switch (regno) {
+       case 0:
+               asm("mov %0, %%db0"     ::"r" (value));
+               break;
+       case 1:
+               asm("mov %0, %%db1"     ::"r" (value));
+               break;
+       case 2:
+               asm("mov %0, %%db2"     ::"r" (value));
+               break;
+       case 3:
+               asm("mov %0, %%db3"     ::"r" (value));
+               break;
+       case 6:
+               asm("mov %0, %%db6"     ::"r" (value));
+               break;
+       case 7:
+               asm("mov %0, %%db7"     ::"r" (value));
+               break;
+       default:
+               BUG();
+       }
+}
+
 static inline void hw_breakpoint_disable(void)
 {
        /* Zero the control register for HW Breakpoint */