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| author | Kyösti Mälkki <kyosti.malkki@gmail.com> | 2019-08-22 12:56:22 +0300 |
|---|---|---|
| committer | Kyösti Mälkki <kyosti.malkki@gmail.com> | 2019-09-11 06:28:27 +0000 |
| commit | 910490f3f48d418824276045489d1ceb221e0ba1 (patch) | |
| tree | 13b0a4dce7e0928acc9c0a5f0bb0e8c039b82001 /src/arch/x86/include | |
| parent | 1095bfafed27a9e71b646ae8515c367480d0ed04 (diff) | |
| download | coreboot-910490f3f48d418824276045489d1ceb221e0ba1.tar.xz | |
arch/x86: Restrict use of _car_global[start|end]
Restrict the use of symbol names _car_global_[start|end]
to be used exclusively with CAR_GLOBAL_MIGRATION=y.
They just alias the start and end of .bss section in CAR.
Change-Id: I36c858a4f181516d4c61f9fd1d5005c7d2c06057
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/35034
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>
Diffstat (limited to 'src/arch/x86/include')
| -rw-r--r-- | src/arch/x86/include/arch/early_variables.h | 9 | ||||
| -rw-r--r-- | src/arch/x86/include/arch/symbols.h | 13 |
2 files changed, 11 insertions, 11 deletions
diff --git a/src/arch/x86/include/arch/early_variables.h b/src/arch/x86/include/arch/early_variables.h index 57f4306619..b88495c85b 100644 --- a/src/arch/x86/include/arch/early_variables.h +++ b/src/arch/x86/include/arch/early_variables.h @@ -20,6 +20,15 @@ #if ENV_ROMSTAGE && CONFIG(CAR_GLOBAL_MIGRATION) +/* + * The _car_global_[start|end]symbols cover CAR data which is relocatable + * once memory comes online. Variables with CAR_GLOBAL decoration + * reside within this region. + */ +extern char _car_global_start[]; +extern char _car_global_end[]; +#define _car_global_size (_car_global_end - _car_global_start) + asm(".section .car.global_data,\"w\",@nobits"); asm(".previous"); #ifdef __clang__ diff --git a/src/arch/x86/include/arch/symbols.h b/src/arch/x86/include/arch/symbols.h index a516155dec..f715e0a6d1 100644 --- a/src/arch/x86/include/arch/symbols.h +++ b/src/arch/x86/include/arch/symbols.h @@ -24,8 +24,8 @@ extern char _car_region_end[]; #define _car_region_size (_car_region_end - _car_region_start) /* - * This is the stack used under CONFIG_C_ENVIRONMENT_BOOTBLOCK for - * all stages that execute when cache-as-ram is up. + * This is the stack area used for all stages that execute when cache-as-ram + * is up. Area is not cleared in between stages. */ extern char _car_stack_start[]; extern char _car_stack_end[]; @@ -38,13 +38,4 @@ extern char _car_ehci_dbg_info_end[]; #define _car_ehci_dbg_info_size \ (_car_ehci_dbg_info_end - _car_ehci_dbg_info_start) -/* - * The _car_global_[start|end]symbols cover CAR data which is relocatable - * once memory comes online. Variables with CAR_GLOBAL decoration - * reside within this region. - */ -extern char _car_global_start[]; -extern char _car_global_end[]; -#define _car_global_size (_car_global_end - _car_global_start) - #endif |