remove trailing whitespace

[coreboot.git] / src / include / cpu / x86 / cache.h

diff --git a/src/include/cpu/x86/cache.h b/src/include/cpu/x86/cache.h
index 858637cf2bd27d6580fdce0f45f9177496bc1e4e..c2de073a521972a6f2edde3a46452a7e3599d5e1 100644 (file)
--- a/src/include/cpu/x86/cache.h
+++ b/src/include/cpu/x86/cache.h
@@ -20,20 +20,17 @@
 #ifndef CPU_X86_CACHE
 #define CPU_X86_CACHE
 
-/* the memory clobber prevents the GCC from reordering the read/write order
-   of CR0 */
-
+/*
+ * Need two versions because ROMCC chokes on certain clobbers:
+ * cache.h:29.71: cache.h:60.24: earlymtrr.c:117.23: romstage.c:144.33:
+ * 0x1559920 asm        Internal compiler error: lhs 1 regcm == 0
  */
 
 #if defined(__GNUC__)
 
-/*
-Need this because ROMCC fails here with:
-
-cache.h:29.71: cache.h:60.24: earlymtrr.c:117.23: romstage.c:144.33: 
-0x1559920 asm        Internal compiler error: lhs 1 regcm == 0
-*/
-
+/* The memory clobber prevents the GCC from reordering the read/write order
+ * of CR0
+ */
 static inline unsigned long read_cr0(void)
 {
        unsigned long cr0;
@@ -46,6 +43,11 @@ static inline void write_cr0(unsigned long cr0)
        asm volatile ("movl %0, %%cr0" : : "r" (cr0) : "memory");
 }
 
+static inline void wbinvd(void)
+{
+       asm volatile ("wbinvd" ::: "memory");
+}
+
 #else
 
 static inline unsigned long read_cr0(void)
@@ -60,20 +62,29 @@ static inline void write_cr0(unsigned long cr0)
        asm volatile ("movl %0, %%cr0" : : "r" (cr0));
 }
 
-#endif
+static inline void wbinvd(void)
+{
+       asm volatile ("wbinvd");
+}
 
+#endif
 
 static inline void invd(void)
 {
        asm volatile("invd" ::: "memory");
 }
 
-static inline void wbinvd(void)
-{
-       asm volatile ("wbinvd" ::: "memory");
-}
-
-static inline void enable_cache(void)
+/* The following functions require the always_inline due to AMD
+ * function STOP_CAR_AND_CPU that disables cache as
+ * ram, the cache as ram stack can no longer be used. Called
+ * functions must be inlined to avoid stack usage. Also, the
+ * compiler must keep local variables register based and not
+ * allocated them from the stack. With gcc 4.5.0, some functions
+ * declared as inline are not being inlined. This patch forces
+ * these functions to always be inlined by adding the qualifier
+ * __attribute__((always_inline)) to their declaration.
+ */
+static inline __attribute__((always_inline)) void enable_cache(void)
 {
        unsigned long cr0;
        cr0 = read_cr0();
@@ -81,7 +92,7 @@ static inline void enable_cache(void)
        write_cr0(cr0);
 }
 
-static inline void disable_cache(void)
+static inline __attribute__((always_inline)) void disable_cache(void)
 {
        /* Disable and write back the cache */
        unsigned long cr0;