From 50c0a50ac6a3fa54ed1286e8b76f933701b6d053 Mon Sep 17 00:00:00 2001 From: David Hendricks Date: Thu, 31 Jan 2013 17:05:50 -0800 Subject: 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 Reviewed-on: http://review.coreboot.org/2254 Reviewed-by: Ronald G. Minnich Tested-by: build bot (Jenkins) --- src/arch/armv7/stages.c | 45 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) create mode 100644 src/arch/armv7/stages.c (limited to 'src/arch/armv7/stages.c') 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 + +void stage_entry(void) +{ + main(); +} + +void stage_exit(unsigned long addr) +{ + __attribute__((noreturn)) void (*doit)(void) = (void *)addr; + doit(); +} -- cgit v1.2.3