[PATCH v7u1 16/31] x86, boot: move verify_cpu.S and no_longmode down

From: Yinghai Lu
Date: Thu Jan 03 2013 - 19:53:10 EST

We need to move some code to 32bit section in following patch:

x86, boot: Move lldt/ltr out of 64bit code section

but that will push startup_64 down from 0x200.

According to hpa, we can not change startup_64 position and that
is an ABI.

We could move function verify_cpu and no_longmode down, because
verify_cpu is used via function call and no_longmode will not
return, then we don't need to add extra code for jumping back.

Signed-off-by: Yinghai Lu <yinghai@xxxxxxxxxx>
Cc: Matt Fleming <matt.fleming@xxxxxxxxx>
arch/x86/boot/compressed/head_64.S | 17 +++++++++--------
1 file changed, 9 insertions(+), 8 deletions(-)

diff --git a/arch/x86/boot/compressed/head_64.S b/arch/x86/boot/compressed/head_64.S
index 2c4b171..fb984c0 100644
--- a/arch/x86/boot/compressed/head_64.S
+++ b/arch/x86/boot/compressed/head_64.S
@@ -176,14 +176,6 @@ ENTRY(startup_32)

- /* This isn't an x86-64 CPU so hang */
- hlt
- jmp 1b
-#include "../../kernel/verify_cpu.S"
* Be careful here startup_64 needs to be at a predictable
* address so I can export it in an ELF header. Bootloaders
@@ -349,6 +341,15 @@ relocated:
jmp *%rbp

+ .code32
+ /* This isn't an x86-64 CPU so hang */
+ hlt
+ jmp 1b
+#include "../../kernel/verify_cpu.S"
.word gdt_end - gdt

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