[U-Boot] [PATCH] x86: use EFI calling convention for efi_main on x86_64

[Ivan Gorinov <ivan.gorinov@intel.com>]

Save the arguments passed in %rcx and %rdx for efi_main() on x86_64;
consistently use EFI calling convention for efi_main().

Signed-off-by: Ivan Gorinov <ivan.gorinov@intel.com>
---
 arch/x86/lib/crt0_x86_64_efi.S | 8 ++++----
 lib/efi/efi_app.c              | 3 ++-
 lib/efi/efi_stub.c             | 3 ++-
 3 files changed, 8 insertions(+), 6 deletions(-)

diff --git a/arch/x86/lib/crt0_x86_64_efi.S b/arch/x86/lib/crt0_x86_64_efi.S
index 989799f..2d53d1b 100644
--- a/arch/x86/lib/crt0_x86_64_efi.S
+++ b/arch/x86/lib/crt0_x86_64_efi.S
@@ -16,19 +16,19 @@ _start:
 	subq $8, %rsp
 	pushq %rcx
 	pushq %rdx
+	pushq %rsi
+	pushq %rdi
 
 0:
 	lea image_base(%rip), %rdi
 	lea _DYNAMIC(%rip), %rsi
 
-	popq %rcx
-	popq %rdx
-	pushq %rcx
-	pushq %rdx
 	call _relocate
 
 	popq %rdi
 	popq %rsi
+	popq %rdx
+	popq %rcx
 
 	call efi_main
 	addq $8, %rsp
diff --git a/lib/efi/efi_app.c b/lib/efi/efi_app.c
index c828093..3eb8eeb 100644
--- a/lib/efi/efi_app.c
+++ b/lib/efi/efi_app.c
@@ -96,7 +96,8 @@ static void free_memory(struct efi_priv *priv)
  * U-Boot. If it returns, EFI will continue. Another way to get back to EFI
  * is via reset_cpu().
  */
-efi_status_t efi_main(efi_handle_t image, struct efi_system_table *sys_table)
+efi_status_t EFIAPI efi_main(efi_handle_t image,
+			     struct efi_system_table *sys_table)
 {
 	struct efi_priv local_priv, *priv = &local_priv;
 	efi_status_t ret;
diff --git a/lib/efi/efi_stub.c b/lib/efi/efi_stub.c
index 3138739..399d16b 100644
--- a/lib/efi/efi_stub.c
+++ b/lib/efi/efi_stub.c
@@ -268,7 +268,8 @@ static void add_entry_addr(struct efi_priv *priv, enum efi_entry_t type,
  * This function is called by our EFI start-up code. It handles running
  * U-Boot. If it returns, EFI will continue.
  */
-efi_status_t efi_main(efi_handle_t image, struct efi_system_table *sys_table)
+efi_status_t EFIAPI efi_main(efi_handle_t image,
+			     struct efi_system_table *sys_table)
 {
 	struct efi_priv local_priv, *priv = &local_priv;
 	struct efi_boot_services *boot = sys_table->boottime;
-- 
2.7.4