diff options
| author | Hung-Te Lin <hungte@chromium.org> | 2014-05-13 22:33:12 +0800 |
|---|---|---|
| committer | Marc Jones <marc.jones@se-eng.com> | 2014-12-30 19:41:40 +0100 |
| commit | 6f98fc30fdef746a5637e6d0c55ee36c27b0b892 (patch) | |
| tree | 50c1ee9a0c795ad3a2ae96f277db4233f8c1560e /payloads/libpayload/arch/arm | |
| parent | 1a3675ec02e1fc8607d8c293121f280ab1e1a67c (diff) | |
| download | coreboot-6f98fc30fdef746a5637e6d0c55ee36c27b0b892.tar.xz | |
libpayload: Provide selfboot function.
The calling convention of payload entry function is different by architecture.
For example, X86 takes no arguments and ARM needs first param to be a
cb_header_ptr*.
To help payloads load and execute other payloads easily and correctly, we should
provide the selfboot() function in libpayload, using same prototype as defined
in coreboot environment.
BUG=none
TEST=emerge-nyan libpayload # pass
BRANCH=none
Original-Change-Id: I8f1cb2c0df788794b2f6f7f5500a3910328a4f84
Original-Signed-off-by: Hung-Te Lin <hungte@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/199503
Original-Reviewed-by: Stefan Reinauer <reinauer@chromium.org>
(cherry picked from commit 1e916cf021ce68886eb9668982c392eadedc7b7e)
Signed-off-by: Marc Jones <marc.jones@se-eng.com>
Change-Id: I7279ef27f49ef581d25a455dd8f1f2f7f1ba58cb
Reviewed-on: http://review.coreboot.org/7907
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Tested-by: build bot (Jenkins)
Diffstat (limited to 'payloads/libpayload/arch/arm')
| -rw-r--r-- | payloads/libpayload/arch/arm/Makefile.inc | 1 | ||||
| -rw-r--r-- | payloads/libpayload/arch/arm/selfboot.c | 35 |
2 files changed, 36 insertions, 0 deletions
diff --git a/payloads/libpayload/arch/arm/Makefile.inc b/payloads/libpayload/arch/arm/Makefile.inc index 5c22ea849b..7009884326 100644 --- a/payloads/libpayload/arch/arm/Makefile.inc +++ b/payloads/libpayload/arch/arm/Makefile.inc @@ -38,6 +38,7 @@ libc-y += virtual.c libc-y += memcpy.S memset.S memmove.S libc-y += exception_asm.S exception.c libc-y += cache.c cpu.S +libc-y += selfboot.c libcbfs-$(CONFIG_LP_CBFS) += dummy_media.c # Add other classes here when you put assembly files into them! diff --git a/payloads/libpayload/arch/arm/selfboot.c b/payloads/libpayload/arch/arm/selfboot.c new file mode 100644 index 0000000000..cbb7ef1b51 --- /dev/null +++ b/payloads/libpayload/arch/arm/selfboot.c @@ -0,0 +1,35 @@ +/* + * Copyright 2014 Google Inc. + * + * See file CREDITS for list of people who contributed to this + * 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; either version 2 of + * the License, or (at your option) any later version. + * + * 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., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#include <libpayload.h> + +extern void *cb_header_ptr; + +void selfboot(void *entry) +{ + __asm__ __volatile__( + "mov r0, %[cb_header_ptr]\n" + "bx %[entry]\n" + :: [cb_header_ptr]"r"(cb_header_ptr), [entry]"r"(entry) + : "r0" + ); +} |