Abstract the code that accesses control register, and
add a separate subarch implementation for Xen.
Signed-off-by: Ian Pratt <[email protected]>
Signed-off-by: Christian Limpach <[email protected]>
Signed-off-by: Chris Wright <[email protected]>
---
include/asm-i386/mach-default/mach_system.h | 57 +++++++++++++++++++++++++++
include/asm-i386/mach-xen/mach_system.h | 54 +++++++++++++++++++++++++
include/asm-i386/system.h | 57 ---------------------------
3 files changed, 111 insertions(+), 57 deletions(-)
diff -r 6b500a8da576 include/asm-i386/mach-default/mach_system.h
--- a/include/asm-i386/mach-default/mach_system.h Thu Jul 13 14:42:43 2006 -0700
+++ b/include/asm-i386/mach-default/mach_system.h Thu Jul 13 15:01:15 2006 -0700
@@ -3,4 +3,61 @@
#define clearsegment(seg)
+#define read_cr0() ({ \
+ unsigned int __dummy; \
+ __asm__ __volatile__( \
+ "movl %%cr0,%0\n\t" \
+ :"=r" (__dummy)); \
+ __dummy; \
+})
+#define write_cr0(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; \
+ __asm__( \
+ "movl %%cr4,%0\n\t" \
+ :"=r" (__dummy)); \
+ __dummy; \
+})
+#define read_cr4_safe() ({ \
+ unsigned int __dummy; \
+ /* This could fault if %cr4 does not exist */ \
+ __asm__("1: movl %%cr4, %0 \n" \
+ "2: \n" \
+ ".section __ex_table,\"a\" \n" \
+ ".long 1b,2b \n" \
+ ".previous \n" \
+ : "=r" (__dummy): "0" (0)); \
+ __dummy; \
+})
+#define write_cr4(x) \
+ __asm__ __volatile__("movl %0,%%cr4": :"r" (x))
+
+/*
+ * Clear and set 'TS' bit respectively
+ */
+#define clts() __asm__ __volatile__ ("clts")
+#define stts() write_cr0(8 | read_cr0())
+
#endif /* __ASM_MACH_SYSTEM_H */
diff -r 6b500a8da576 include/asm-i386/mach-xen/mach_system.h
--- a/include/asm-i386/mach-xen/mach_system.h Thu Jul 13 14:42:43 2006 -0700
+++ b/include/asm-i386/mach-xen/mach_system.h Thu Jul 13 14:42:43 2006 -0700
@@ -5,4 +5,58 @@
#define clearsegment(seg) loadsegment(seg, 0)
+
+/*
+ * Clear and set 'TS' bit respectively
+ */
+#define clts() __asm__ __volatile__ ("clts")
+#define read_cr0() ({ \
+ unsigned int __dummy; \
+ __asm__ __volatile__( \
+ "movl %%cr0,%0\n\t" \
+ :"=r" (__dummy)); \
+ __dummy; \
+})
+#define write_cr0(x) \
+ __asm__ __volatile__("movl %0,%%cr0": :"r" (x));
+
+#define read_cr2() \
+ (HYPERVISOR_shared_info->vcpu_info[smp_processor_id()].arch.cr2)
+#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; \
+ __asm__( \
+ "movl %%cr4,%0\n\t" \
+ :"=r" (__dummy)); \
+ __dummy; \
+})
+
+#define read_cr4_safe() ({ \
+ unsigned int __dummy; \
+ /* This could fault if %cr4 does not exist */ \
+ __asm__("1: movl %%cr4, %0 \n" \
+ "2: \n" \
+ ".section __ex_table,\"a\" \n" \
+ ".long 1b,2b \n" \
+ ".previous \n" \
+ : "=r" (__dummy): "0" (0)); \
+ __dummy; \
+})
+
+#define write_cr4(x) \
+ __asm__ __volatile__("movl %0,%%cr4": :"r" (x));
+#define stts() write_cr0(8 | read_cr0())
+
#endif /* __ASM_MACH_SYSTEM_H */
diff -r 6b500a8da576 include/asm-i386/system.h
--- a/include/asm-i386/system.h Thu Jul 13 14:42:43 2006 -0700
+++ b/include/asm-i386/system.h Thu Jul 13 15:00:54 2006 -0700
@@ -81,63 +81,6 @@ __asm__ __volatile__ ("movw %%dx,%1\n\t"
*/
#define savesegment(seg, value) \
asm volatile("mov %%" #seg ",%0":"=rm" (value))
-
-#define read_cr0() ({ \
- unsigned int __dummy; \
- __asm__ __volatile__( \
- "movl %%cr0,%0\n\t" \
- :"=r" (__dummy)); \
- __dummy; \
-})
-#define write_cr0(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; \
- __asm__( \
- "movl %%cr4,%0\n\t" \
- :"=r" (__dummy)); \
- __dummy; \
-})
-#define read_cr4_safe() ({ \
- unsigned int __dummy; \
- /* This could fault if %cr4 does not exist */ \
- __asm__("1: movl %%cr4, %0 \n" \
- "2: \n" \
- ".section __ex_table,\"a\" \n" \
- ".long 1b,2b \n" \
- ".previous \n" \
- : "=r" (__dummy): "0" (0)); \
- __dummy; \
-})
-#define write_cr4(x) \
- __asm__ __volatile__("movl %0,%%cr4": :"r" (x))
-
-/*
- * Clear and set 'TS' bit respectively
- */
-#define clts() __asm__ __volatile__ ("clts")
-#define stts() write_cr0(8 | read_cr0())
#endif /* __KERNEL__ */
--
-
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