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| author | Kyösti Mälkki <kyosti.malkki@gmail.com> | 2019-01-11 21:07:36 +0200 |
|---|---|---|
| committer | Nico Huber <nico.h@gmx.de> | 2020-06-13 12:25:18 +0000 |
| commit | ed318f2001c0616651f5fff4be5dbe10f4d66702 (patch) | |
| tree | 46d392f9268ae37b789cf32e8acdc9457957e226 /src/arch | |
| parent | 03248033e7be6f81ad5b60ed21a60071aee32c67 (diff) | |
arch/x86: Add symbols for CAR MTRRs in linker script
This allows to remove references to CONFIG_DCACHE_RAM entries in
most cache_as_ram.S files. While Kconfig variable names appear
for every stage, linker symbol names will only appear in stages
they are valid in.
Also, linker scripts have LOG2CEIL which comes in handy to enforce
MTRR alignments.
Change-Id: I2fef3546d2bfea2d4d8f87aaf8376e5566fd6aaa
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/30872
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src/arch')
| -rw-r--r-- | src/arch/x86/car.ld | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/src/arch/x86/car.ld b/src/arch/x86/car.ld index ddd4e7a2bf..17b774845b 100644 --- a/src/arch/x86/car.ld +++ b/src/arch/x86/car.ld @@ -1,5 +1,8 @@ /* SPDX-License-Identifier: GPL-2.0-only */ +/* CACHE_ROM_SIZE defined here. */ +#include <cpu/x86/mtrr.h> + /* This file is included inside a SECTIONS block */ . = CONFIG_DCACHE_RAM_BASE; .car.data . (NOLOAD) : { @@ -73,6 +76,27 @@ _car_region_end = . + CONFIG_DCACHE_RAM_SIZE - (. - _car_region_start); } +. = _car_region_end; +.car.mrc_var . (NOLOAD) : { + . += CONFIG_DCACHE_RAM_MRC_VAR_SIZE; +} + +#if ENV_BOOTBLOCK +_car_mtrr_end = .; +_car_mtrr_start = _car_region_start; + +_car_mtrr_size = _car_mtrr_end - _car_mtrr_start; +_car_mtrr_sz_log2 = 1 << LOG2CEIL(_car_mtrr_size); +_car_mtrr_mask = ~(MAX(4096, _car_mtrr_sz_log2) - 1); + +#if !CONFIG(NO_XIP_EARLY_STAGES) +_xip_program_sz_log2 = 1 << LOG2CEIL(_ebootblock - _bootblock); +_xip_mtrr_mask = ~(MAX(4096, _xip_program_sz_log2) - 1); +#endif + +_rom_mtrr_mask = ~(CACHE_ROM_SIZE - 1); +_rom_mtrr_base = _rom_mtrr_mask; +#endif /* Global variables are not allowed in romstage * This section is checked during stage creation to ensure |