diff options
Diffstat (limited to 'src/drivers/amd/agesa')
| -rw-r--r-- | src/drivers/amd/agesa/Makefile.inc | 2 | ||||
| -rw-r--r-- | src/drivers/amd/agesa/cache_as_ram.S | 58 | ||||
| -rw-r--r-- | src/drivers/amd/agesa/exit_car.S | 37 |
3 files changed, 39 insertions, 58 deletions
diff --git a/src/drivers/amd/agesa/Makefile.inc b/src/drivers/amd/agesa/Makefile.inc index fb46d91991..dfb385da80 100644 --- a/src/drivers/amd/agesa/Makefile.inc +++ b/src/drivers/amd/agesa/Makefile.inc @@ -20,7 +20,7 @@ romstage-y += state_machine.c ramstage-y += state_machine.c cpu_incs-y += $(src)/drivers/amd/agesa/cache_as_ram.S -postcar-y += cache_as_ram.S +postcar-y += exit_car.S romstage-y += def_callouts.c romstage-y += eventlog.c diff --git a/src/drivers/amd/agesa/cache_as_ram.S b/src/drivers/amd/agesa/cache_as_ram.S index dcb0c43d8e..3f1358a2f8 100644 --- a/src/drivers/amd/agesa/cache_as_ram.S +++ b/src/drivers/amd/agesa/cache_as_ram.S @@ -27,7 +27,6 @@ .code32 .globl _cache_as_ram_setup, _cache_as_ram_setup_end -.globl chipset_teardown_car _cache_as_ram_setup: @@ -105,66 +104,11 @@ _cache_as_ram_setup: pushl %eax call romstage_main -#if CONFIG(POSTCAR_STAGE) - -/* We do not return. Execution continues with run_postcar_phase() - * calling to chipset_teardown_car below. - */ - jmp postcar_entry_failure - -chipset_teardown_car: - -/* - * Retrieve return address from stack as it will get trashed below if - * execution is utilizing the cache-as-ram stack. - */ - pop %esp - -#else - - movl %eax, %esp - -/* Register %esp is new stacktop for remaining of romstage. */ - -#endif - - /* Disable cache */ - movl %cr0, %eax - orl $CR0_CacheDisable, %eax - movl %eax, %cr0 - -/* Register %esp is preserved in AMD_DISABLE_STACK. */ - AMD_DISABLE_STACK - -#if CONFIG(POSTCAR_STAGE) - - jmp *%esp - -#else - - /* enable cache */ - movl %cr0, %eax - andl $0x9fffffff, %eax - movl %eax, %cr0 - - call romstage_after_car - -#endif - /* Should never see this postcode */ - post_code(0xaf) + post_code(0xae) stop: hlt jmp stop -/* These are here for linking purposes. */ -.weak early_all_cores, romstage_main -early_all_cores: -romstage_main: -postcar_entry_failure: - /* Should never see this postcode */ - post_code(0xae) - jmp stop - _cache_as_ram_setup_end: diff --git a/src/drivers/amd/agesa/exit_car.S b/src/drivers/amd/agesa/exit_car.S new file mode 100644 index 0000000000..f9d056e599 --- /dev/null +++ b/src/drivers/amd/agesa/exit_car.S @@ -0,0 +1,37 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2011 Advanced Micro Devices, Inc. + * + * 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 <gcccar.inc> +#include <cpu/x86/cache.h> + +.code32 +.globl chipset_teardown_car + +chipset_teardown_car: + pop %esp + + /* Disable cache */ + movl %cr0, %eax + orl $CR0_CacheDisable, %eax + movl %eax, %cr0 + + AMD_DISABLE_STACK + + /* enable cache */ + movl %cr0, %eax + andl $(~(CR0_CD | CR0_NW)), %eax + movl %eax, %cr0 + + jmp *%esp |