1 /* 2 * Copyright (c) 2015, ARM Limited and Contributors. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are met: 6 * 7 * Redistributions of source code must retain the above copyright notice, this 8 * list of conditions and the following disclaimer. 9 * 10 * Redistributions in binary form must reproduce the above copyright notice, 11 * this list of conditions and the following disclaimer in the documentation 12 * and/or other materials provided with the distribution. 13 * 14 * Neither the name of ARM nor the names of its contributors may be used 15 * to endorse or promote products derived from this software without specific 16 * prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #include <bl_common.h> 32 #include <errno.h> 33 #include <platform.h> 34 #include <plat_arm.h> 35 #include <tbbr_img_def.h> 36 #include <v2m_def.h> 37 38 #define RESET_REASON_WDOG_RESET (0x2) 39 40 /******************************************************************************* 41 * The following function checks if Firmware update is needed, 42 * by checking if TOC in FIP image is valid or watchdog reset happened. 43 ******************************************************************************/ 44 unsigned int bl1_plat_get_next_image_id(void) 45 { 46 unsigned int *reset_flags_ptr = (unsigned int *)SSC_GPRETN; 47 unsigned int *nv_flags_ptr = (unsigned int *) 48 (V2M_SYSREGS_BASE + V2M_SYS_NVFLAGS); 49 /* 50 * Check if TOC is invalid or watchdog reset happened. 51 */ 52 if ((arm_io_is_toc_valid() != 1) || 53 ((*reset_flags_ptr & RESET_REASON_WDOG_RESET) && 54 ((*nv_flags_ptr == -EAUTH) || (*nv_flags_ptr == -ENOENT)))) 55 return NS_BL1U_IMAGE_ID; 56 57 return BL2_IMAGE_ID; 58 } 59 60 /******************************************************************************* 61 * On JUNO update the arg2 with address of SCP_BL2U image info. 62 ******************************************************************************/ 63 void bl1_plat_set_ep_info(unsigned int image_id, 64 entry_point_info_t *ep_info) 65 { 66 if (image_id == BL2U_IMAGE_ID) { 67 image_desc_t *image_desc = bl1_plat_get_image_desc(SCP_BL2U_IMAGE_ID); 68 ep_info->args.arg2 = (unsigned long)&image_desc->image_info; 69 } 70 } 71 72 /******************************************************************************* 73 * On Juno clear SYS_NVFLAGS and wait for watchdog reset. 74 ******************************************************************************/ 75 __dead2 void bl1_plat_fwu_done(void *client_cookie, void *reserved) 76 { 77 unsigned int *nv_flags_clr = (unsigned int *) 78 (V2M_SYSREGS_BASE + V2M_SYS_NVFLAGSCLR); 79 unsigned int *nv_flags_ptr = (unsigned int *) 80 (V2M_SYSREGS_BASE + V2M_SYS_NVFLAGS); 81 82 /* Clear the NV flags register. */ 83 *nv_flags_clr = *nv_flags_ptr; 84 85 while (1) 86 wfi(); 87 } 88