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https://github.com/ARM-software/arm-trusted-firmware.git
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74d44a49f8
The SCP_BL2 is transferred to SCP during BL2 image load and authenticate sequence. The Boot-Over-MHU (BOM) protocol is used as transport for this. After the SCP boots using the transferred image, the AP CPU waits till the `READY` message is received from SCP. This patch separates the API for transport of image from the wait for `READY` message and also moves the related files to the `css/drivers` folder. The previous API `scp_bootloader_transfer` is renamed to `css_scp_boot_image_xfer` to reflect the css naming convention. This reorganisation also allows easier switch to a different transport (eg: Shared Data Structure based transfer) in future Change-Id: I8a96f9c4616ffde6dbfdf7c18f6f6f8bfa40bbf0 Signed-off-by: Soby Mathew <soby.mathew@arm.com>
56 lines
1.7 KiB
C
56 lines
1.7 KiB
C
/*
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* Copyright (c) 2015-2017, ARM Limited and Contributors. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <bl_common.h>
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#include <debug.h>
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#include <plat_arm.h>
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#include "../drivers/scp/css_scp.h"
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/* Weak definition may be overridden in specific CSS based platform */
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#pragma weak bl2u_plat_handle_scp_bl2u
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/* Data structure which holds the SCP_BL2U image info for BL2U */
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static image_info_t scp_bl2u_image_info;
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/*******************************************************************************
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* BL1 can pass platform dependent information to BL2U in x1.
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* In case of ARM CSS platforms x1 contains SCP_BL2U image info.
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* In case of ARM FVP platforms x1 is not used.
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* In both cases, x0 contains the extents of the memory available to BL2U
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******************************************************************************/
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void bl2u_early_platform_setup(meminfo_t *mem_layout, void *plat_info)
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{
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if (!plat_info)
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panic();
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arm_bl2u_early_platform_setup(mem_layout, plat_info);
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scp_bl2u_image_info = *(image_info_t *)plat_info;
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}
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/*******************************************************************************
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* Transfer SCP_BL2U from Trusted RAM using the SCP Download protocol.
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******************************************************************************/
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int bl2u_plat_handle_scp_bl2u(void)
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{
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int ret;
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INFO("BL2U: Initiating SCP_BL2U transfer to SCP\n");
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ret = css_scp_boot_image_xfer((void *)scp_bl2u_image_info.image_base,
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scp_bl2u_image_info.image_size);
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if (ret == 0)
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ret = css_scp_boot_ready();
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if (ret == 0)
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INFO("BL2U: SCP_BL2U transferred to SCP\n");
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else
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ERROR("BL2U: SCP_BL2U transfer failure\n");
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return ret;
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}
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