diff options
author | Furquan Shaikh <furquan@google.com> | 2014-04-28 16:39:40 -0700 |
---|---|---|
committer | Isaac Christensen <isaac.christensen@se-eng.com> | 2014-09-23 18:10:32 +0200 |
commit | 2af76f4bdc81df699bad55f65335ff518381d7dd (patch) | |
tree | 5b022587d2179837c73ecb7001bf86726a823373 /src/arch/arm64/stages.c | |
parent | 804702602c017f9aebb66f409f8ed9a5d9200a4e (diff) |
coreboot arm64: Add support for arm64 into coreboot framework
Add support for enabling different coreboot stages (bootblock, romstage and
ramstage) to have arm64 architecture. Most of the files have been copied over
from arm/ or arm64-generic work.
Signed-off-by: Furquan Shaikh <furquan@google.com>
Reviewed-on: https://chromium-review.googlesource.com/197397
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Commit-Queue: Furquan Shaikh <furquan@chromium.org>
Tested-by: Furquan Shaikh <furquan@chromium.org>
(cherry picked from commit 033ba96516805502673ac7404bc97e6ce4e2a934)
This patch is essentially a squash of aarch64 changes made by
these patches:
d955885 coreboot: Rename coreboot_ram stage to ramstage
a492761 cbmem console: Locate the preram console with a symbol instead of a sect
96e7f0e aarch64: Enable early icache and migrate SCTLR from EL3
3f854dc aarch64: Pass coreboot table in jmp_to_elf_entry
ab3ecaf aarch64/foundation-armv8: Set up RAM area and enter ramstage
25fd2e9 aarch64: Remove CAR definitions from early_variables.h
65bf77d aarch64/foundation-armv8: Enable DYNAMIC_CBMEM
9484873 aarch64: Change default exception level to EL2
7a152c3 aarch64: Fix formatting of exception registers dump
6946464 aarch64: Implement basic exception handling
c732a9d aarch64/foundation-armv8: Basic bootblock implementation
3bc412c aarch64: Comment out some parts of code to allow build
ab5be71 Add initial aarch64 support
The ramstage support is the only portion that has been tested
on actual hardware. Bootblock and romstage support may require
modifications to run on hardware.
Change-Id: Icd59bec55c963a471a50e30972a8092e4c9d2fb2
Signed-off-by: Isaac Christensen <isaac.christensen@se-eng.com>
Reviewed-on: http://review.coreboot.org/6915
Tested-by: build bot (Jenkins)
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Diffstat (limited to 'src/arch/arm64/stages.c')
-rw-r--r-- | src/arch/arm64/stages.c | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/src/arch/arm64/stages.c b/src/arch/arm64/stages.c new file mode 100644 index 0000000000..e1ab21aadf --- /dev/null +++ b/src/arch/arm64/stages.c @@ -0,0 +1,53 @@ +/* + * This file is part of the coreboot project. + * + * Copyright 2014 Google 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +/* + * This file contains entry/exit functions for each stage during coreboot + * execution (bootblock entry and ramstage exit will depend on external + * loading). + * + * Entry points must be placed at the location the previous stage jumps + * to (the lowest address in the stage image). This is done by giving + * stage_entry() its own section in .text and placing it first in the + * linker script. + */ + +#include <arch/stages.h> +#include <arch/cache.h> + +void stage_entry(void) +{ + main(); +} + +/* we had marked 'doit' as 'noreturn'. + * There is no apparent harm in leaving it as something we can return from, and in the one + * case where we call a payload, the payload is allowed to return. + * Hence, leave it as something we can return from. + */ +void stage_exit(void *addr) +{ + void (*doit)(void) = addr; + /* + * Most stages load code so we need to sync caches here. Should maybe + * go into cbfs_load_stage() instead... + */ + cache_sync_instructions(); + doit(); +} |