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| author | Kyösti Mälkki <kyosti.malkki@gmail.com> | 2019-01-09 20:30:52 +0200 |
|---|---|---|
| committer | Kyösti Mälkki <kyosti.malkki@gmail.com> | 2019-01-13 08:37:01 +0000 |
| commit | 34856579f8e9349104cfdd0245a2b966bc59a7ea (patch) | |
| tree | 9f32c9ceb13c7e8ec3ab9563628a6dc49b03623d /src/cpu/x86/16bit | |
| parent | 95b3ba526419ca4de04d200b00b267b50576c7c9 (diff) | |
arch/x86: Drop Kconfig AP_SIPI_VECTOR
This was used to check romcc-built bootblock and romstage
agree about the location of 16-bit entrypoint. There was
no need to customize it as bootblock size requirement did
not grow. Just check for a fixed location at 4 GiB - 4 KiB.
With C_ENVIRONMENT_BOOTBLOCK we can have a proper symbol
for the purpose, since it appears in the same compilation
unit. It will adjust if C_ENV_BOOTBLOCK_SIZE changes.
Change-Id: I93f3c37e78ba587455c804de8c57e7e06832a81f
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/30854
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Diffstat (limited to 'src/cpu/x86/16bit')
| -rw-r--r-- | src/cpu/x86/16bit/entry16.inc | 7 | ||||
| -rw-r--r-- | src/cpu/x86/16bit/entry16.ld | 1 |
2 files changed, 8 insertions, 0 deletions
diff --git a/src/cpu/x86/16bit/entry16.inc b/src/cpu/x86/16bit/entry16.inc index 5a9739c9b9..55d9bd97e2 100644 --- a/src/cpu/x86/16bit/entry16.inc +++ b/src/cpu/x86/16bit/entry16.inc @@ -28,6 +28,13 @@ */ #include <arch/rom_segs.h> + +#if IS_ENABLED(CONFIG_SIPI_VECTOR_IN_ROM) +/* Symbol _start16bit must be aligned to 4kB to start AP CPUs with + * Startup IPI message without RAM. + */ +.align 4096 +#endif .code16 .globl _start16bit .type _start16bit, @function diff --git a/src/cpu/x86/16bit/entry16.ld b/src/cpu/x86/16bit/entry16.ld index 112d429953..66bfbd58ca 100644 --- a/src/cpu/x86/16bit/entry16.ld +++ b/src/cpu/x86/16bit/entry16.ld @@ -1,2 +1,3 @@ gdtptr16_offset = gdtptr16 & 0xffff; nullidt_offset = nullidt & 0xffff; + ap_sipi_vector_in_rom = (_start16bit >> 12) & 0xff; |