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coreboot-kgpe-d16/payloads/libpayload/arch/arm/head.S

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libpayload: Initial ARMv7 port This compiles, but it's not tested yet. Change-Id: I2f73a814649aa36c39af3e77cefd8a968671f5c0 Signed-off-by: Stefan Reinauer <reinauer@google.com> Reviewed-on: http://review.coreboot.org/2035 Tested-by: build bot (Jenkins) Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
2012-12-14 22:05:21 +01:00
/*
* This file is part of the libpayload project.
*
* Copyright (C) 2008 Advanced Micro Devices, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
arm: Move libgcc assembly macros to arch/asm.h libgcc/macros.h contains some useful assembly macros that are common in Linux kernel code and facilitate things such as unified ARM/THUMB assembly. This patch moves it to a more general place where it can be used by other code as well. Change-Id: If68e8930aaafa706c54cf9a156fac826b31bb193 Signed-off-by: Julius Werner <jwerner@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/182178 Reviewed-by: Vincent Palatin <vpalatin@chromium.org> (cherry picked from commit a780670def94a969829811fa8cf257f12b88f085) Signed-off-by: Isaac Christensen <isaac.christensen@se-eng.com> Reviewed-on: http://review.coreboot.org/6917 Tested-by: build bot (Jenkins) Reviewed-by: David Hendricks <dhendrix@chromium.org>
2013-12-13 05:24:48 +01:00
#include <arch/asm.h>
libpayload: Initial ARMv7 port This compiles, but it's not tested yet. Change-Id: I2f73a814649aa36c39af3e77cefd8a968671f5c0 Signed-off-by: Stefan Reinauer <reinauer@google.com> Reviewed-on: http://review.coreboot.org/2035 Tested-by: build bot (Jenkins) Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
2012-12-14 22:05:21 +01:00
/*
* Our entry point
*/
arm: Move libgcc assembly macros to arch/asm.h libgcc/macros.h contains some useful assembly macros that are common in Linux kernel code and facilitate things such as unified ARM/THUMB assembly. This patch moves it to a more general place where it can be used by other code as well. Change-Id: If68e8930aaafa706c54cf9a156fac826b31bb193 Signed-off-by: Julius Werner <jwerner@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/182178 Reviewed-by: Vincent Palatin <vpalatin@chromium.org> (cherry picked from commit a780670def94a969829811fa8cf257f12b88f085) Signed-off-by: Isaac Christensen <isaac.christensen@se-eng.com> Reviewed-on: http://review.coreboot.org/6917 Tested-by: build bot (Jenkins) Reviewed-by: David Hendricks <dhendrix@chromium.org>
2013-12-13 05:24:48 +01:00
ENTRY(_entry)
libpayload: Initial ARMv7 port This compiles, but it's not tested yet. Change-Id: I2f73a814649aa36c39af3e77cefd8a968671f5c0 Signed-off-by: Stefan Reinauer <reinauer@google.com> Reviewed-on: http://review.coreboot.org/2035 Tested-by: build bot (Jenkins) Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
2012-12-14 22:05:21 +01:00
/* TODO: disable interrupts */
libpayload: Move over to the payload's stack during startup Don't keep using the coreboot stack on ARMv7. Change-Id: I734c5d77f8584e30ee0c720d41e21e3040f56db4 Signed-off-by: Gabe Black <gabeblack@google.com> Reviewed-on: http://review.coreboot.org/2668 Tested-by: build bot (Jenkins) Reviewed-by: Marc Jones <marc.jones@se-eng.com> Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
2013-02-27 04:08:28 +01:00
libpayload: Initial ARMv7 port This compiles, but it's not tested yet. Change-Id: I2f73a814649aa36c39af3e77cefd8a968671f5c0 Signed-off-by: Stefan Reinauer <reinauer@google.com> Reviewed-on: http://review.coreboot.org/2035 Tested-by: build bot (Jenkins) Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
2012-12-14 22:05:21 +01:00
/* TODO: Clear BSS */
libpayload: Move over to the payload's stack during startup Don't keep using the coreboot stack on ARMv7. Change-Id: I734c5d77f8584e30ee0c720d41e21e3040f56db4 Signed-off-by: Gabe Black <gabeblack@google.com> Reviewed-on: http://review.coreboot.org/2668 Tested-by: build bot (Jenkins) Reviewed-by: Marc Jones <marc.jones@se-eng.com> Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
2013-02-27 04:08:28 +01:00
/* Setup new stack */
arm: Put assembly functions into separate sections This patch changes the ENTRY() macro in asm.h to create a new section for every assembler function, thus providing dcache_clean/invalidate_all and friends with the same --gc-sections goodness that our C functions have. This requires a few minor changes of moving around data (to make sure it ends up in the right section) and changing some libgcc functions (which apparently need to have two names?), but nothing serious. (You may note that some of our assembly functions have data, sometimes even writable, within the same .text section. This has been this way before and I'm not looking to change it for now, although it's not totally clean. Since we don't enforce read-only sections through paging, it doesn't really hurt.) BUG=None TEST=Nyan and Snow still boot. Confirm dcache_invalidate_all is not output into any binary anymore since no one actually uses it. Original-Change-Id: I247b29d6173ba516c8dff59126c93b66f7dc4b8d Original-Signed-off-by: Julius Werner <jwerner@chromium.org> Original-Reviewed-on: https://chromium-review.googlesource.com/183891 (cherry picked from commit 4a3f2e45e06cc8592d56c3577f41ff879f10e9cc) Signed-off-by: Marc Jones <marc.jones@se-eng.com> Change-Id: Ieaa4f2ea9d81c5b9e2b36a772ff9610bdf6446f9 Reviewed-on: http://review.coreboot.org/7451 Tested-by: build bot (Jenkins) Reviewed-by: David Hendricks <dhendrix@chromium.org>
2014-01-25 01:23:08 +01:00
ldr sp, 1f
libpayload: Move over to the payload's stack during startup Don't keep using the coreboot stack on ARMv7. Change-Id: I734c5d77f8584e30ee0c720d41e21e3040f56db4 Signed-off-by: Gabe Black <gabeblack@google.com> Reviewed-on: http://review.coreboot.org/2668 Tested-by: build bot (Jenkins) Reviewed-by: Marc Jones <marc.jones@se-eng.com> Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
2013-02-27 04:08:28 +01:00
arm: Move libgcc assembly macros to arch/asm.h libgcc/macros.h contains some useful assembly macros that are common in Linux kernel code and facilitate things such as unified ARM/THUMB assembly. This patch moves it to a more general place where it can be used by other code as well. Change-Id: If68e8930aaafa706c54cf9a156fac826b31bb193 Signed-off-by: Julius Werner <jwerner@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/182178 Reviewed-by: Vincent Palatin <vpalatin@chromium.org> (cherry picked from commit a780670def94a969829811fa8cf257f12b88f085) Signed-off-by: Isaac Christensen <isaac.christensen@se-eng.com> Reviewed-on: http://review.coreboot.org/6917 Tested-by: build bot (Jenkins) Reviewed-by: David Hendricks <dhendrix@chromium.org>
2013-12-13 05:24:48 +01:00
/* TODO: Save old stack pointer and link register */
libpayload: Initial ARMv7 port This compiles, but it's not tested yet. Change-Id: I2f73a814649aa36c39af3e77cefd8a968671f5c0 Signed-off-by: Stefan Reinauer <reinauer@google.com> Reviewed-on: http://review.coreboot.org/2035 Tested-by: build bot (Jenkins) Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
2012-12-14 22:05:21 +01:00
/* Let's rock. */
arm: Move libgcc assembly macros to arch/asm.h libgcc/macros.h contains some useful assembly macros that are common in Linux kernel code and facilitate things such as unified ARM/THUMB assembly. This patch moves it to a more general place where it can be used by other code as well. Change-Id: If68e8930aaafa706c54cf9a156fac826b31bb193 Signed-off-by: Julius Werner <jwerner@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/182178 Reviewed-by: Vincent Palatin <vpalatin@chromium.org> (cherry picked from commit a780670def94a969829811fa8cf257f12b88f085) Signed-off-by: Isaac Christensen <isaac.christensen@se-eng.com> Reviewed-on: http://review.coreboot.org/6917 Tested-by: build bot (Jenkins) Reviewed-by: David Hendricks <dhendrix@chromium.org>
2013-12-13 05:24:48 +01:00
bl start_main
libpayload: Initial ARMv7 port This compiles, but it's not tested yet. Change-Id: I2f73a814649aa36c39af3e77cefd8a968671f5c0 Signed-off-by: Stefan Reinauer <reinauer@google.com> Reviewed-on: http://review.coreboot.org/2035 Tested-by: build bot (Jenkins) Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
2012-12-14 22:05:21 +01:00
arm: Move libgcc assembly macros to arch/asm.h libgcc/macros.h contains some useful assembly macros that are common in Linux kernel code and facilitate things such as unified ARM/THUMB assembly. This patch moves it to a more general place where it can be used by other code as well. Change-Id: If68e8930aaafa706c54cf9a156fac826b31bb193 Signed-off-by: Julius Werner <jwerner@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/182178 Reviewed-by: Vincent Palatin <vpalatin@chromium.org> (cherry picked from commit a780670def94a969829811fa8cf257f12b88f085) Signed-off-by: Isaac Christensen <isaac.christensen@se-eng.com> Reviewed-on: http://review.coreboot.org/6917 Tested-by: build bot (Jenkins) Reviewed-by: David Hendricks <dhendrix@chromium.org>
2013-12-13 05:24:48 +01:00
/* %r0 has the return value - pass it on unmolested */
/* TODO: restore old stack pointer and link register */
libpayload: Initial ARMv7 port This compiles, but it's not tested yet. Change-Id: I2f73a814649aa36c39af3e77cefd8a968671f5c0 Signed-off-by: Stefan Reinauer <reinauer@google.com> Reviewed-on: http://review.coreboot.org/2035 Tested-by: build bot (Jenkins) Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
2012-12-14 22:05:21 +01:00
/* Return to the original context. */
arm: Move libgcc assembly macros to arch/asm.h libgcc/macros.h contains some useful assembly macros that are common in Linux kernel code and facilitate things such as unified ARM/THUMB assembly. This patch moves it to a more general place where it can be used by other code as well. Change-Id: If68e8930aaafa706c54cf9a156fac826b31bb193 Signed-off-by: Julius Werner <jwerner@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/182178 Reviewed-by: Vincent Palatin <vpalatin@chromium.org> (cherry picked from commit a780670def94a969829811fa8cf257f12b88f085) Signed-off-by: Isaac Christensen <isaac.christensen@se-eng.com> Reviewed-on: http://review.coreboot.org/6917 Tested-by: build bot (Jenkins) Reviewed-by: David Hendricks <dhendrix@chromium.org>
2013-12-13 05:24:48 +01:00
bx lr
ENDPROC(_entry)
arm: Put assembly functions into separate sections This patch changes the ENTRY() macro in asm.h to create a new section for every assembler function, thus providing dcache_clean/invalidate_all and friends with the same --gc-sections goodness that our C functions have. This requires a few minor changes of moving around data (to make sure it ends up in the right section) and changing some libgcc functions (which apparently need to have two names?), but nothing serious. (You may note that some of our assembly functions have data, sometimes even writable, within the same .text section. This has been this way before and I'm not looking to change it for now, although it's not totally clean. Since we don't enforce read-only sections through paging, it doesn't really hurt.) BUG=None TEST=Nyan and Snow still boot. Confirm dcache_invalidate_all is not output into any binary anymore since no one actually uses it. Original-Change-Id: I247b29d6173ba516c8dff59126c93b66f7dc4b8d Original-Signed-off-by: Julius Werner <jwerner@chromium.org> Original-Reviewed-on: https://chromium-review.googlesource.com/183891 (cherry picked from commit 4a3f2e45e06cc8592d56c3577f41ff879f10e9cc) Signed-off-by: Marc Jones <marc.jones@se-eng.com> Change-Id: Ieaa4f2ea9d81c5b9e2b36a772ff9610bdf6446f9 Reviewed-on: http://review.coreboot.org/7451 Tested-by: build bot (Jenkins) Reviewed-by: David Hendricks <dhendrix@chromium.org>
2014-01-25 01:23:08 +01:00
.align 4
1:
.word _stack