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| author | Julius Werner <jwerner@chromium.org> | 2017-05-18 14:44:08 -0700 |
|---|---|---|
| committer | Julius Werner <jwerner@chromium.org> | 2017-05-30 22:19:25 +0200 |
| commit | a92851939cffcfa11d3abf80cc910a43bb48e6b0 (patch) | |
| tree | 3ede1be9698278b11cc8472bf6797f1abdbed989 /src/arch/x86 | |
| parent | c25b2a18fa42f26a799c55c5e463ecb5f4e4c89e (diff) | |
| download | coreboot-a92851939cffcfa11d3abf80cc910a43bb48e6b0.tar.xz | |
arch/x86: Add function to determine if we're currently running from CAR
This patch adds a simple function that can be used to check if
CAR_GLOBALs are currently being read from CAR or from DRAM.
Change-Id: Ib7ad0896a691ef6e89e622b985417fedc43579c1
Signed-off-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://review.coreboot.org/19787
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Philippe Mathieu-Daudé <philippe.mathieu.daude@gmail.com>
Diffstat (limited to 'src/arch/x86')
| -rw-r--r-- | src/arch/x86/include/arch/early_variables.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/src/arch/x86/include/arch/early_variables.h b/src/arch/x86/include/arch/early_variables.h index d0cfda75aa..2c6c539654 100644 --- a/src/arch/x86/include/arch/early_variables.h +++ b/src/arch/x86/include/arch/early_variables.h @@ -44,12 +44,20 @@ static inline void *car_sync_var_ptr(void *var) { return var; } + +static inline int car_active(void) +{ + return 1; +} #else /* Get the correct pointer for the CAR global variable. */ void *car_get_var_ptr(void *var); /* Get and update a CAR_GLOBAL pointing elsewhere in car.global_data*/ void *car_sync_var_ptr(void *var); + +/* Return 1 when currently running with globals in Cache-as-RAM, 0 otherwise. */ +int car_active(void); #endif /* ENV_VERSTAGE */ /* Get and set a primitive type global variable. */ @@ -73,6 +81,7 @@ static inline size_t car_object_offset(void *ptr) #else #define CAR_GLOBAL static inline void *car_get_var_ptr(void *var) { return var; } +static inline int car_active(void) { return 0; } #define car_get_var(var) (var) #define car_sync_var(var) (var) #define car_set_var(var, val) (var) = (val) |