97 lines
3.4 KiB
C
97 lines
3.4 KiB
C
/*
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* Copyright (c) 2015, ARM Limited and Contributors. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* Neither the name of ARM nor the names of its contributors may be used
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* to endorse or promote products derived from this software without specific
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* prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <bl_common.h>
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#include <css_def.h>
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#include <debug.h>
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#include <mmio.h>
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#include <plat_arm.h>
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#include <string.h>
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#include "css_scp_bootloader.h"
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/* Weak definition may be overridden in specific CSS based platform */
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#pragma weak bl2_plat_handle_bl30
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/*******************************************************************************
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* Transfer BL3-0 from Trusted RAM using the SCP Download protocol.
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* Return 0 on success, -1 otherwise.
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******************************************************************************/
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int bl2_plat_handle_bl30(image_info_t *bl30_image_info)
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{
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int ret;
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INFO("BL2: Initiating BL3-0 transfer to SCP\n");
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ret = scp_bootloader_transfer((void *)bl30_image_info->image_base,
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bl30_image_info->image_size);
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if (ret == 0)
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INFO("BL2: BL3-0 transferred to SCP\n");
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else
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ERROR("BL2: BL3-0 transfer failure\n");
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return ret;
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}
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#ifdef EL3_PAYLOAD_BASE
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/*
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* We need to override some of the platform functions when booting an EL3
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* payload.
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*/
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static unsigned int scp_boot_config;
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void bl2_early_platform_setup(meminfo_t *mem_layout)
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{
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arm_bl2_early_platform_setup(mem_layout);
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/* Save SCP Boot config before it gets overwritten by BL30 loading */
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scp_boot_config = mmio_read_32(SCP_BOOT_CFG_ADDR);
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VERBOSE("BL2: Saved SCP Boot config = 0x%x\n", scp_boot_config);
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}
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void bl2_platform_setup(void)
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{
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arm_bl2_platform_setup();
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/*
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* Before releasing the AP cores out of reset, the SCP writes some data
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* at the beginning of the Trusted SRAM. It is is overwritten before
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* reaching this function. We need to restore this data, as if the
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* target had just come out of reset. This implies:
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* - zeroing the first 128 bytes of Trusted SRAM;
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* - restoring the SCP boot configuration.
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*/
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VERBOSE("BL2: Restoring SCP reset data in Trusted SRAM\n");
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memset((void *) ARM_TRUSTED_SRAM_BASE, 0, 128);
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mmio_write_32(SCP_BOOT_CFG_ADDR, scp_boot_config);
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}
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#endif /* EL3_PAYLOAD_BASE */
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