GNUBoot
/
coreboot-kgpe-d16
2
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Asm code: Use NO_EARLY_BOOTBLOCK_POSTCODES to remove Asm port80s 

Expand NO_EARLY_BOOTBLOCK_POSTCODES to all of the early assembly code in
bootblock.

BUG=b:191370340
TEST: Build with & without the option enabled

Signed-off-by: Martin Roth <martinroth@chromium.org>
Change-Id: Idb4a96820d5c391fc17a0f0dcccd519d4881b78c
Reviewed-on: https://review.coreboot.org/c/coreboot/+/55731
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Raul Rangel <rrangel@chromium.org>
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
This commit is contained in:
Martin Roth 2021-06-21 09:18:46 -06:00 committed by Patrick Georgi
parent b8bba6519e
commit 8a85a84fac
4 changed files with 7 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
src/console/Kconfig
View File

@ -464,10 +464,12 @@ config NO_EARLY_BOOTBLOCK_POSTCODES
def_bool n
help
Some chipsets require that the routing for the port 80h POST
code be configured before any POST codes are sent out.
This can be done in the boot block, but there are a couple of
POST codes that go out before the chipset's bootblock initialization
can happen. This option suppresses those POST codes.
code be configured before any POST codes are sent out. If this is
not done, the system can hang on the first POST code. This
initialization can be done in the boot block, but there are a couple
of POST codes that go out before the chipset's C bootblock
initialization can happen. This option suppresses all postcodes in
the early assembly code.
config HWBASE_DEBUG_CB
bool

2
src/cpu/x86/entry16.S
View File

@ -43,9 +43,7 @@ _start16bit:
cli
/* Save the BIST result */
movl %eax, %ebp
#if !CONFIG(NO_EARLY_BOOTBLOCK_POSTCODES)
post_code(POST_RESET_VECTOR_CORRECT)
#endif
/* IMMEDIATELY invalidate the translation lookaside buffer (TLB) before
* executing any further code. Even though paging is disabled we

2
src/cpu/x86/entry32.S
View File

@ -31,9 +31,7 @@ bootblock_protected_mode_entry:
/* Save the BIST value */
movl %eax, %ebp
#if !CONFIG(NO_EARLY_BOOTBLOCK_POSTCODES)
post_code(POST_ENTER_PROTECTED_MODE)
#endif
movw $ROM_DATA_SEG, %ax
movw %ax, %ds

2
src/include/cpu/x86/post_code.h
View File

@ -3,7 +3,7 @@
#include <console/post_codes.h>
#if CONFIG(POST_IO)
#if CONFIG(POST_IO) && !(ENV_BOOTBLOCK && CONFIG(NO_EARLY_BOOTBLOCK_POSTCODES))
#define post_code(value) \
movb $value, %al; \
outb %al, $CONFIG_POST_IO_PORT