diff options
| author | Hannah Williams <hannah.williams@intel.com> | 2018-04-27 09:09:04 -0700 |
|---|---|---|
| committer | Aaron Durbin <adurbin@chromium.org> | 2018-05-03 04:40:58 +0000 |
| commit | d3c0c0c318d2e2b5a3d6276bb0fdd732170756d3 (patch) | |
| tree | bed0302a3bb8c7223cf41c9cf538c27aaeb83098 /src/arch/x86/assembly_entry.S | |
| parent | 0f9af5500e7bc524debe3affd1a9cb406102ab9a (diff) | |
arch/x86: Relocate GDT in verstage, romstage, and postcar
In each stage keep GDT in the code region. This accommodates
platforms, such as glk, that are executing out of CAR. The
gdt is small and loading it is trivial so just do it unconditionally
instead of introducing another Kconfig.
BUG=b:78656686
Change-Id: I01ded6e9b358b23e04d92bef5263bfe8c2a5ec5a
Signed-off-by: Hannah Williams <hannah.williams@intel.com>
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/25895
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Justin TerAvest <teravest@chromium.org>
Diffstat (limited to 'src/arch/x86/assembly_entry.S')
| -rw-r--r-- | src/arch/x86/assembly_entry.S | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/src/arch/x86/assembly_entry.S b/src/arch/x86/assembly_entry.S index a5399b74a5..02f492cfaa 100644 --- a/src/arch/x86/assembly_entry.S +++ b/src/arch/x86/assembly_entry.S @@ -20,15 +20,18 @@ /* * This path is for stages that are post bootblock when employing - * CONFIG_C_ENVIRONMENT_BOOTBLOCK. There's no need to re-load the gdt, - * etc as all those settings are cached within the processor. In order - * to continue with C code execution one needs to set stack pointer and - * clear CAR_GLOBAL variables that are stage specific. + * CONFIG_C_ENVIRONMENT_BOOTBLOCK. The gdt is reloaded to accommodate + * platforms that are executing out of CAR. In order to continue with + * C code execution one needs to set stack pointer and clear CAR_GLOBAL + * variables that are stage specific. */ .section ".text._start", "ax", @progbits .global _start _start: + /* Migrate GDT to this text segment */ + call gdt_init + /* reset stack pointer to CAR stack */ mov $_car_stack_end, %esp |