You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
134 lines
5.0 KiB
134 lines
5.0 KiB
/*
|
|
* Copyright (c) 2013-2015, ARM Limited and Contributors. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are met:
|
|
*
|
|
* Redistributions of source code must retain the above copyright notice, this
|
|
* list of conditions and the following disclaimer.
|
|
*
|
|
* 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.
|
|
*
|
|
* Neither the name of ARM nor the names of its contributors may be used
|
|
* to endorse or promote products derived from this software without specific
|
|
* prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT HOLDER 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.
|
|
*/
|
|
|
|
#include <arch.h>
|
|
#include <bl_common.h>
|
|
#include <el3_common_macros.S>
|
|
|
|
.globl bl31_entrypoint
|
|
|
|
|
|
/* -----------------------------------------------------
|
|
* bl31_entrypoint() is the cold boot entrypoint,
|
|
* executed only by the primary cpu.
|
|
* -----------------------------------------------------
|
|
*/
|
|
|
|
func bl31_entrypoint
|
|
#if !RESET_TO_BL31
|
|
/* ---------------------------------------------------------------
|
|
* Preceding bootloader has populated x0 with a pointer to a
|
|
* 'bl31_params' structure & x1 with a pointer to platform
|
|
* specific structure
|
|
* ---------------------------------------------------------------
|
|
*/
|
|
mov x20, x0
|
|
mov x21, x1
|
|
|
|
/* ---------------------------------------------------------------------
|
|
* For !RESET_TO_BL31 systems, only the primary CPU ever reaches
|
|
* bl31_entrypoint() during the cold boot flow, so the cold/warm boot
|
|
* and primary/secondary CPU logic should not be executed in this case.
|
|
*
|
|
* Also, assume that the previous bootloader has already set up the CPU
|
|
* endianness and has initialised the memory.
|
|
* ---------------------------------------------------------------------
|
|
*/
|
|
el3_entrypoint_common \
|
|
_set_endian=0 \
|
|
_warm_boot_mailbox=0 \
|
|
_secondary_cold_boot=0 \
|
|
_init_memory=0 \
|
|
_init_c_runtime=1 \
|
|
_exception_vectors=runtime_exceptions
|
|
|
|
/* ---------------------------------------------------------------------
|
|
* Relay the previous bootloader's arguments to the platform layer
|
|
* ---------------------------------------------------------------------
|
|
*/
|
|
mov x0, x20
|
|
mov x1, x21
|
|
#else
|
|
/* ---------------------------------------------------------------------
|
|
* For RESET_TO_BL31 systems which have a programmable reset address,
|
|
* bl31_entrypoint() is executed only on the cold boot path so we can
|
|
* skip the warm boot mailbox mechanism.
|
|
* ---------------------------------------------------------------------
|
|
*/
|
|
el3_entrypoint_common \
|
|
_set_endian=1 \
|
|
_warm_boot_mailbox=!PROGRAMMABLE_RESET_ADDRESS \
|
|
_secondary_cold_boot=!COLD_BOOT_SINGLE_CPU \
|
|
_init_memory=1 \
|
|
_init_c_runtime=1 \
|
|
_exception_vectors=runtime_exceptions
|
|
|
|
/* ---------------------------------------------------------------------
|
|
* For RESET_TO_BL31 systems, BL3-1 is the first bootloader to run so
|
|
* there's no argument to relay from a previous bootloader. Zero the
|
|
* arguments passed to the platform layer to reflect that.
|
|
* ---------------------------------------------------------------------
|
|
*/
|
|
mov x0, 0
|
|
mov x1, 0
|
|
#endif /* RESET_TO_BL31 */
|
|
|
|
/* ---------------------------------------------
|
|
* Perform platform specific early arch. setup
|
|
* ---------------------------------------------
|
|
*/
|
|
bl bl31_early_platform_setup
|
|
bl bl31_plat_arch_setup
|
|
|
|
/* ---------------------------------------------
|
|
* Jump to main function.
|
|
* ---------------------------------------------
|
|
*/
|
|
bl bl31_main
|
|
|
|
/* -------------------------------------------------------------
|
|
* Clean the .data & .bss sections to main memory. This ensures
|
|
* that any global data which was initialised by the primary CPU
|
|
* is visible to secondary CPUs before they enable their data
|
|
* caches and participate in coherency.
|
|
* -------------------------------------------------------------
|
|
*/
|
|
adr x0, __DATA_START__
|
|
adr x1, __DATA_END__
|
|
sub x1, x1, x0
|
|
bl clean_dcache_range
|
|
|
|
adr x0, __BSS_START__
|
|
adr x1, __BSS_END__
|
|
sub x1, x1, x0
|
|
bl clean_dcache_range
|
|
|
|
b el3_exit
|
|
endfunc bl31_entrypoint
|
|
|