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      1 /*
      2  * Copyright (c) 2017, ARM Limited and Contributors. All rights reserved.
      3  *
      4  * SPDX-License-Identifier: BSD-3-Clause
      5  */
      6 
      7 #include <bl_common.h>
      8 #include <debug.h>
      9 #include <desc_image_load.h>
     10 #include <errno.h>
     11 #include <io/io_storage.h>
     12 #include <platform.h>
     13 #include <platform_def.h>
     14 #include <xlat_tables_v2.h>
     15 
     16 #include "uniphier.h"
     17 
     18 static meminfo_t uniphier_bl2_tzram_layout __aligned(CACHE_WRITEBACK_GRANULE);
     19 static int uniphier_bl2_kick_scp;
     20 
     21 void bl2_early_platform_setup(meminfo_t *mem_layout)
     22 {
     23 	uniphier_bl2_tzram_layout = *mem_layout;
     24 
     25 	uniphier_console_setup();
     26 }
     27 
     28 static const struct mmap_region uniphier_bl2_mmap[] = {
     29 	/* for SCP, BL33 */
     30 	MAP_REGION_FLAT(UNIPHIER_NS_DRAM_BASE, UNIPHIER_NS_DRAM_SIZE,
     31 			MT_MEMORY | MT_RW | MT_NS),
     32 	{ .size = 0 },
     33 };
     34 
     35 void bl2_plat_arch_setup(void)
     36 {
     37 	unsigned int soc;
     38 	int skip_scp = 0;
     39 	int ret;
     40 
     41 	uniphier_mmap_setup(UNIPHIER_SEC_DRAM_BASE, UNIPHIER_SEC_DRAM_SIZE,
     42 			    uniphier_bl2_mmap);
     43 	enable_mmu_el1(0);
     44 
     45 	soc = uniphier_get_soc_id();
     46 	if (soc == UNIPHIER_SOC_UNKNOWN) {
     47 		ERROR("unsupported SoC\n");
     48 		plat_error_handler(-ENOTSUP);
     49 	}
     50 
     51 	ret = uniphier_io_setup(soc);
     52 	if (ret) {
     53 		ERROR("failed to setup io devices\n");
     54 		plat_error_handler(ret);
     55 	}
     56 
     57 	switch (uniphier_get_boot_master(soc)) {
     58 	case UNIPHIER_BOOT_MASTER_THIS:
     59 		INFO("Booting from this SoC\n");
     60 		skip_scp = 1;
     61 		break;
     62 	case UNIPHIER_BOOT_MASTER_SCP:
     63 		INFO("Booting from on-chip SCP\n");
     64 		if (uniphier_scp_is_running()) {
     65 			INFO("SCP is already running. SCP_BL2 load will be skipped.\n");
     66 			skip_scp = 1;
     67 		}
     68 
     69 		/*
     70 		 * SCP must be kicked every time even if it is already running
     71 		 * because it polls this event after the reboot of the backend.
     72 		 */
     73 		uniphier_bl2_kick_scp = 1;
     74 		break;
     75 	case UNIPHIER_BOOT_MASTER_EXT:
     76 		INFO("Booting from external SCP\n");
     77 		skip_scp = 1;
     78 		break;
     79 	default:
     80 		plat_error_handler(-ENOTSUP);
     81 	}
     82 
     83 	if (!skip_scp) {
     84 		ret = uniphier_check_image(SCP_BL2_IMAGE_ID);
     85 		if (ret) {
     86 			WARN("SCP_BL2 image not found. SCP_BL2 load will be skipped.\n");
     87 			WARN("You must setup SCP by other means.\n");
     88 			skip_scp = 1;
     89 			uniphier_bl2_kick_scp = 0;
     90 		}
     91 	}
     92 
     93 	if (skip_scp)
     94 		uniphier_image_descs_fixup();
     95 }
     96 
     97 void bl2_platform_setup(void)
     98 {
     99 }
    100 
    101 void plat_flush_next_bl_params(void)
    102 {
    103 	flush_bl_params_desc();
    104 }
    105 
    106 bl_load_info_t *plat_get_bl_image_load_info(void)
    107 {
    108 	return get_bl_load_info_from_mem_params_desc();
    109 }
    110 
    111 bl_params_t *plat_get_next_bl_params(void)
    112 {
    113 	return get_next_bl_params_from_mem_params_desc();
    114 }
    115 
    116 int bl2_plat_handle_post_image_load(unsigned int image_id)
    117 {
    118 	if (image_id == SCP_BL2_IMAGE_ID && uniphier_bl2_kick_scp)
    119 		uniphier_scp_start();
    120 
    121 	return 0;
    122 }
    123