diff options
Diffstat (limited to 'src/drivers/intel/fsp1_1/cache_as_ram.S')
| -rw-r--r-- | src/drivers/intel/fsp1_1/cache_as_ram.S | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/src/drivers/intel/fsp1_1/cache_as_ram.S b/src/drivers/intel/fsp1_1/cache_as_ram.S index b5b47ce9a6..f2d29aa4a8 100644 --- a/src/drivers/intel/fsp1_1/cache_as_ram.S +++ b/src/drivers/intel/fsp1_1/cache_as_ram.S @@ -145,6 +145,14 @@ CAR_init_done: * mm1: high 32-bits of TSC value */ + /* + * temp_memory_start/end reside in the .bss section, which gets cleared + * below. Save the FSP return value to the stack before writing those + * variables. + */ + push %ecx + push %edx + /* clear .bss section */ cld xor %eax, %eax @@ -154,6 +162,11 @@ CAR_init_done: shrl $2, %ecx rep stosl + pop %edx + movl %edx, temp_memory_end + pop %ecx + movl %ecx, temp_memory_start + /* Need to align stack to 16 bytes at call instruction. Account for the pushes below. */ andl $0xfffffff0, %esp |