x86: chromebook_link: Implement CAR support (cache as RAM)
Add support for CAR so that we have memory to use prior to DRAM init.
On link there is a total of 128KB of CAR available, although some is
used for the memory reference code.
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/x86/include/asm/post.h b/arch/x86/include/asm/post.h
index 3371185..b203dc9 100644
--- a/arch/x86/include/asm/post.h
+++ b/arch/x86/include/asm/post.h
@@ -13,9 +13,18 @@
/* post codes which represent various stages of init */
#define POST_START 0x1e
#define POST_CAR_START 0x1f
-
+#define POST_CAR_SIPI 0x20
+#define POST_CAR_MTRR 0x21
+#define POST_CAR_UNCACHEABLE 0x22
+#define POST_CAR_BASE_ADDRESS 0x23
+#define POST_CAR_MASK 0x24
+#define POST_CAR_FILL 0x25
+#define POST_CAR_ROM_CACHE 0x26
+#define POST_CAR_MRC_CACHE 0x27
+#define POST_CAR_CPU_CACHE 0x28
#define POST_START_STACK 0x29
#define POST_START_DONE 0x2a
+#define POST_CPU_INIT 0x2b
/* Output a post code using al - value must be 0 to 0xff */
#ifdef __ASSEMBLY__
@@ -23,6 +32,8 @@
movb $value, %al; \
outb %al, $POST_PORT
#else
+#include <asm/io.h>
+
static inline void post_code(int code)
{
outb(code, POST_PORT);