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Diffstat (limited to 'arch/x86/boot/compressed/head_64.S')
-rw-r--r--arch/x86/boot/compressed/head_64.S20
1 files changed, 20 insertions, 0 deletions
diff --git a/arch/x86/boot/compressed/head_64.S b/arch/x86/boot/compressed/head_64.S
index 35af09d13dc..558d76ce23b 100644
--- a/arch/x86/boot/compressed/head_64.S
+++ b/arch/x86/boot/compressed/head_64.S
@@ -199,6 +199,26 @@ ENTRY(startup_64)
* an identity mapped page table being provied that maps our
* entire text+data+bss and hopefully all of memory.
*/
+#ifdef CONFIG_EFI_STUB
+ pushq %rsi
+ mov %rcx, %rdi
+ mov %rdx, %rsi
+ call efi_main
+ popq %rsi
+ cmpq $0,%rax
+ je preferred_addr
+ movq %rax,%rsi
+ call 1f
+1:
+ popq %rax
+ subq $1b, %rax
+ subq BP_pref_address(%rsi), %rax
+ add BP_code32_start(%esi), %eax
+ leaq preferred_addr(%rax), %rax
+ jmp *%rax
+
+preferred_addr:
+#endif
/* Setup data segments. */
xorl %eax, %eax