x86: Add a CBMEM timestamp generated right before the kernel startup.

To maintain the initialization state of the timestamp facility, thesq
pointer to the CBMEM section containing the timestamp table should be
kept in the .data section (so that it is maintained across u-boot
relocation).

Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>

diff --git a/arch/x86/include/asm/arch-coreboot/timestamp.h b/arch/x86/include/asm/arch-coreboot/timestamp.h
index e48ad86..d104912 100644 (file)
--- a/arch/x86/include/asm/arch-coreboot/timestamp.h
+++ b/arch/x86/include/asm/arch-coreboot/timestamp.h
@@ -42,6 +42,7 @@ enum timestamp_id {
 
        /* U-Boot entry IDs start at 1000 */
        TS_U_BOOT_INITTED = 1000, /* This is where u-boot starts */
+       TS_U_BOOT_START_KERNEL = 1100, /* Right before jumping to kernel. */
 };
 
 void timestamp_init(void);

diff --git a/arch/x86/lib/zimage.c b/arch/x86/lib/zimage.c
index b8c672b..238ed61 100644 (file)
--- a/arch/x86/lib/zimage.c
+++ b/arch/x86/lib/zimage.c
@@ -36,6 +36,9 @@
 #include <asm/realmode.h>
 #include <asm/byteorder.h>
 #include <asm/bootparam.h>
+#ifdef CONFIG_SYS_COREBOOT
+#include <asm/arch/timestamp.h>
+#endif
 
 /*
  * Memory lay-out:
@@ -283,6 +286,9 @@ void boot_zimage(void *setup_base, void *load_address)
 {
        printf("\nStarting kernel ...\n\n");
 
+#ifdef CONFIG_SYS_COREBOOT
+       timestamp_add_now(TS_U_BOOT_START_KERNEL);
+#endif
 #if defined CONFIG_ZBOOT_32
        /*
         * Set %ebx, %ebp, and %edi to 0, %esi to point to the boot_params