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author | David Hendricks <dhendrix@chromium.org> | 2013-01-31 17:05:50 -0800 |
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committer | Ronald G. Minnich <rminnich@gmail.com> | 2013-02-01 03:25:30 +0100 |
commit | 50c0a50ac6a3fa54ed1286e8b76f933701b6d053 (patch) | |
tree | 7db0043dc830d9c522639b7bb3b98c2529dcdc88 /src/arch/armv7/stages.c | |
parent | 79e36d90608a929c33b655c6fb6376f33f332e6f (diff) | |
download | coreboot-50c0a50ac6a3fa54ed1286e8b76f933701b6d053.tar.xz |
armv7: unify stage hand-off routines
This replaces the current stage-specific exit/entry functions with
generic versions. Now all stages compile with stage_entry(), which
is placed at .text.stage_entry.armv7, and stage_exit().
Snow's ramstage files are also updated to avoid build breakage.
Change-Id: I953a2c4b8121bd4b66c3362557997a9ca3aa53b0
Signed-off-by: David Hendricks <dhendrix@chromium.org>
Reviewed-on: http://review.coreboot.org/2254
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Tested-by: build bot (Jenkins)
Diffstat (limited to 'src/arch/armv7/stages.c')
-rw-r--r-- | src/arch/armv7/stages.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/src/arch/armv7/stages.c b/src/arch/armv7/stages.c new file mode 100644 index 0000000000..fd4374ff9c --- /dev/null +++ b/src/arch/armv7/stages.c @@ -0,0 +1,45 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2012 The ChromiumOS Authors. All rights reserved. + * + * 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. + * + * Unlike other files, this one should be compiled with a -m option to + * specify a pre-determined instruction set. The is to ensure consistency + * in the CPU operating mode (ARM or Thumb) when hand-off between stages + * occurs. + * + * 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> + +void stage_entry(void) +{ + main(); +} + +void stage_exit(unsigned long addr) +{ + __attribute__((noreturn)) void (*doit)(void) = (void *)addr; + doit(); +} |