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cpu/qemu-x86/car: Move long mode entry right before c entry 

This fixes non-emulation platforms as those are using 32bit code
after the bootblock_crt0 entry, like setting up CAR and updating
microcode, which isn't yet converted to support long mode.

This is a noop for the only supported x86_64 platform and all
x86_32 platforms.

Change-Id: I45e56ed8db9a44c00cd61e962bb82f27926eb23f
Signed-off-by: Patrick Rudolph <siro@das-labor.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/37370
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
This commit is contained in:
Patrick Rudolph 2019-11-15 12:31:18 +01:00
parent 20f580b6f9
commit dc2f0e39ae
2 changed files with 3 additions and 6 deletions
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6
src/arch/x86/bootblock_crt0.S
View File

@ -20,12 +20,6 @@
#include <cpu/x86/16bit/reset16.inc>
#include <cpu/x86/32bit/entry32.inc>
/* BIST result in eax */
mov %eax, %ebx
/* entry64.inc preserves ebx. */
#include <cpu/x86/64bit/entry64.inc>
mov %ebx, %eax
#if CONFIG(BOOTBLOCK_DEBUG_SPINLOOP)
/* Wait for a JTAG debugger to break in and set EBX non-zero */

3
src/cpu/qemu-x86/cache_as_ram_bootblock.S
View File

@ -27,6 +27,9 @@ cache_as_ram:
/* Align the stack and keep aligned for call to bootblock_c_entry() */
and $0xfffffff0, %esp
/* entry64.inc preserves ebx. */
#include <cpu/x86/64bit/entry64.inc>
/* Restore the BIST result and timestamps. */
#if defined(__x86_64__)
movd %mm2, %rdi