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| author | Kyösti Mälkki <kyosti.malkki@gmail.com> | 2017-09-01 07:10:56 +0300 |
|---|---|---|
| committer | Kyösti Mälkki <kyosti.malkki@gmail.com> | 2017-09-08 03:26:55 +0000 |
| commit | 65e54662e35508623505e1d01c23c6c5caf7e2de (patch) | |
| tree | ac3f506b8e8962243962b8afd2601e84a719aec6 | |
| parent | f8e9449df084d0ccd1a98e756b37343e509c6b67 (diff) | |
intel/car: Fix stack guard placement
Make sure guard placement is above CAR region.
Change-Id: I780cdc0b2a549e7ac4b23b0870619f5648a644e7
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/21313
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
| -rw-r--r-- | src/cpu/intel/car/romstage.c | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/src/cpu/intel/car/romstage.c b/src/cpu/intel/car/romstage.c index 14776126c8..555c3846b4 100644 --- a/src/cpu/intel/car/romstage.c +++ b/src/cpu/intel/car/romstage.c @@ -15,6 +15,7 @@ #include <console/console.h> #include <cpu/intel/romstage.h> #include <cpu/x86/mtrr.h> +#include <arch/symbols.h> #include <program_loading.h> #define DCACHE_RAM_ROMSTAGE_STACK_SIZE 0x2000 @@ -25,9 +26,19 @@ asmlinkage void *romstage_main(unsigned long bist) void *romstage_stack_after_car; const int num_guards = 4; const u32 stack_guard = 0xdeadbeef; - u32 *stack_base = (void *)(CONFIG_DCACHE_RAM_BASE + - CONFIG_DCACHE_RAM_SIZE - - DCACHE_RAM_ROMSTAGE_STACK_SIZE); + u32 *stack_base; + u32 size; + + /* Size of unallocated CAR. */ + size = _car_region_end - _car_relocatable_data_end; + size = ALIGN_DOWN(size, 16); + + size = MIN(size, DCACHE_RAM_ROMSTAGE_STACK_SIZE); + if (size < DCACHE_RAM_ROMSTAGE_STACK_SIZE) + printk(BIOS_DEBUG, "Romstage stack size limited to 0x%x!\n", + size); + + stack_base = (u32 *) (_car_region_end - size); for (i = 0; i < num_guards; i++) stack_base[i] = stack_guard; |