88 lines
3.5 KiB
C
88 lines
3.5 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 <errno.h>
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#include <platform.h>
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#include <plat_arm.h>
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#include <tbbr_img_def.h>
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#include <v2m_def.h>
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#define RESET_REASON_WDOG_RESET (0x2)
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/*******************************************************************************
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* The following function checks if Firmware update is needed,
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* by checking if TOC in FIP image is valid or watchdog reset happened.
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******************************************************************************/
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unsigned int bl1_plat_get_next_image_id(void)
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{
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unsigned int *reset_flags_ptr = (unsigned int *)SSC_GPRETN;
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unsigned int *nv_flags_ptr = (unsigned int *)
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(V2M_SYSREGS_BASE + V2M_SYS_NVFLAGS);
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/*
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* Check if TOC is invalid or watchdog reset happened.
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*/
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if ((arm_io_is_toc_valid() != 1) ||
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((*reset_flags_ptr & RESET_REASON_WDOG_RESET) &&
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((*nv_flags_ptr == -EAUTH) || (*nv_flags_ptr == -ENOENT))))
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return NS_BL1U_IMAGE_ID;
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return BL2_IMAGE_ID;
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}
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/*******************************************************************************
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* On JUNO update the arg2 with address of SCP_BL2U image info.
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******************************************************************************/
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void bl1_plat_set_ep_info(unsigned int image_id,
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entry_point_info_t *ep_info)
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{
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if (image_id == BL2U_IMAGE_ID) {
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image_desc_t *image_desc = bl1_plat_get_image_desc(SCP_BL2U_IMAGE_ID);
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ep_info->args.arg2 = (unsigned long)&image_desc->image_info;
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}
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}
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/*******************************************************************************
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* On Juno clear SYS_NVFLAGS and wait for watchdog reset.
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******************************************************************************/
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__dead2 void bl1_plat_fwu_done(void *client_cookie, void *reserved)
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{
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unsigned int *nv_flags_clr = (unsigned int *)
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(V2M_SYSREGS_BASE + V2M_SYS_NVFLAGSCLR);
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unsigned int *nv_flags_ptr = (unsigned int *)
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(V2M_SYSREGS_BASE + V2M_SYS_NVFLAGS);
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/* Clear the NV flags register. */
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*nv_flags_clr = *nv_flags_ptr;
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while (1)
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wfi();
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}
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