diff options
author | Kyösti Mälkki <kyosti.malkki@gmail.com> | 2016-06-27 13:24:11 +0300 |
---|---|---|
committer | Kyösti Mälkki <kyosti.malkki@gmail.com> | 2016-11-11 18:43:10 +0100 |
commit | a4ffe9dda0eb50eb698fef303f426408338fa0ff (patch) | |
tree | e8e7026a1cc0c3e5e3929e47905015da524e3011 /src/cpu/intel/car/romstage.c | |
parent | 9b9915284f5070c6f664fa36495ae831e95ea819 (diff) |
intel post-car: Separate files for setup_stack_and_mtrrs()
Have a common romstage.c file to prepare CAR stack guards.
MTRR setup around cbmem_top() is somewhat northbridge specific,
place stubs under northbridge for platrform that will move
to RELOCATABLE_RAMSTAGE.
Change-Id: I3d4fe4145894e83e5980dc2a7bbb8a91acecb3c6
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/15762
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Diffstat (limited to 'src/cpu/intel/car/romstage.c')
-rw-r--r-- | src/cpu/intel/car/romstage.c | 51 |
1 files changed, 50 insertions, 1 deletions
diff --git a/src/cpu/intel/car/romstage.c b/src/cpu/intel/car/romstage.c index c6df446c6a..d04b6e120c 100644 --- a/src/cpu/intel/car/romstage.c +++ b/src/cpu/intel/car/romstage.c @@ -1,7 +1,56 @@ +/* + * This file is part of the coreboot project. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <arch/cpu.h> +#include <console/console.h> #include <cpu/intel/romstage.h> +#include <program_loading.h> + +#define DCACHE_RAM_ROMSTAGE_STACK_SIZE 0x800 void * asmlinkage romstage_main(unsigned long bist) { + int i; + 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); + + for (i = 0; i < num_guards; i++) + stack_base[i] = stack_guard; + mainboard_romstage_entry(bist); - return (void*)CONFIG_RAMTOP; + + /* Check the stack. */ + for (i = 0; i < num_guards; i++) { + if (stack_base[i] == stack_guard) + continue; + printk(BIOS_DEBUG, "Smashed stack detected in romstage!\n"); + } + + /* Get the stack to use after cache-as-ram is torn down. */ + if (IS_ENABLED(CONFIG_LATE_CBMEM_INIT)) + romstage_stack_after_car = (void*)CONFIG_RAMTOP; + else + romstage_stack_after_car = setup_stack_and_mtrrs(); + + return romstage_stack_after_car; +} + +void asmlinkage romstage_after_car(void) +{ + /* Load the ramstage. */ + run_ramstage(); } |