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https://github.com/ARM-software/arm-trusted-firmware.git
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18e279ebe6
This patch does the required changes to enable CSS platforms to build and use the SDS framework. Since SDS is always coupled with SCMI protocol, the preexisting SCMI build flag is now renamed to `CSS_USE_SCMI_SDS_DRIVER` which will enable both SCMI and SDS on CSS platforms. Also some of the workarounds applied for SCMI are now removed with SDS in place. Change-Id: I94e8b93f05e3fe95e475c5501c25bec052588a9c Signed-off-by: Soby Mathew <soby.mathew@arm.com>
92 lines
2.6 KiB
C
92 lines
2.6 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 <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 <utils.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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#if LOAD_IMAGE_V2
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#pragma weak plat_arm_bl2_handle_scp_bl2
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#else
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#pragma weak bl2_plat_handle_scp_bl2
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#endif
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/*******************************************************************************
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* Transfer SCP_BL2 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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#if LOAD_IMAGE_V2
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int plat_arm_bl2_handle_scp_bl2(image_info_t *scp_bl2_image_info)
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#else
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int bl2_plat_handle_scp_bl2(image_info_t *scp_bl2_image_info)
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#endif
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{
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int ret;
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INFO("BL2: Initiating SCP_BL2 transfer to SCP\n");
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ret = css_scp_boot_image_xfer((void *)scp_bl2_image_info->image_base,
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scp_bl2_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("BL2: SCP_BL2 transferred to SCP\n");
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else
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ERROR("BL2: SCP_BL2 transfer failure\n");
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return ret;
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}
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#if !CSS_USE_SCMI_SDS_DRIVER
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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. These needs to be done only for SCPI/BOM SCP systems as
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* in case of SDS, the structures remain in memory and doesn't need to be
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* overwritten.
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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 SCP_BL2 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 using zeromem instead
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* of zero_normalmem since this is device memory.
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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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zeromem((void *) ARM_SHARED_RAM_BASE, 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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#endif /* CSS_USE_SCMI_SDS_DRIVER */
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