Subrata Banik has uploaded this change for review.

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libpayload: Save EAX and EBX for multiboot payloads

When CONFIG_LP_MULTIBOOT is enabled, save the values of EAX and EBX
passed from the bootloader. This information can be useful for
multiboot payloads feature alone.

Change-Id: I98c2cd00206ee48eb0fc67edd9533032bcf3e5eb
Signed-off-by: Subrata Banik <subratabanik@google.com>
---
M payloads/libpayload/arch/x86/head.S
M payloads/libpayload/arch/x86/main.c
2 files changed, 4 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/40/82040/1

diff --git a/payloads/libpayload/arch/x86/head.S b/payloads/libpayload/arch/x86/head.S
index 1e0e4a0..2bac700 100644
--- a/payloads/libpayload/arch/x86/head.S
+++ b/payloads/libpayload/arch/x86/head.S
@@ -63,9 +63,11 @@
 	/* No interrupts, please. */
 	cli
 
+#if CONFIG(LP_MULTIBOOT)
 	/* Store EAX and EBX */
 	movl %eax, loader_eax
 	movl %ebx, loader_ebx
+#endif
 
 	/* save pointer to coreboot tables */
 	movl 4(%esp), %eax
diff --git a/payloads/libpayload/arch/x86/main.c b/payloads/libpayload/arch/x86/main.c
index 288f474..85636a4 100644
--- a/payloads/libpayload/arch/x86/main.c
+++ b/payloads/libpayload/arch/x86/main.c
@@ -30,8 +30,10 @@
 #include <libpayload.h>
 #include <arch/apic.h>
 
+#if CONFIG(LP_MULTIBOOT)
 unsigned long loader_eax;  /**< The value of EAX passed from the loader */
 unsigned long loader_ebx;  /**< The value of EBX passed from the loader */
+#endif
 
 int main_argc;    /**< The argc value to pass to main() */
 

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