blob: badda644958d4df93454ca4d217c74bdc2883b8f [file] [log] [blame]
Achin Gupta4f6ad662013-10-25 09:08:21 +01001/*
2 * Copyright (c) 2013, ARM Limited. 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 <stdio.h>
32#include <string.h>
33#include <assert.h>
34#include <arch_helpers.h>
35#include <platform.h>
36#include <semihosting.h>
37#include <bl1.h>
38
39void bl1_arch_next_el_setup(void);
40
41/*******************************************************************************
42 * Function to perform late architectural and platform specific initialization.
43 * It also locates and loads the BL2 raw binary image in the trusted DRAM. Only
44 * called by the primary cpu after a cold boot.
45 * TODO: Add support for alternative image load mechanism e.g using virtio/elf
46 * loader etc.
47 ******************************************************************************/
48void bl1_main(void)
49{
50 unsigned long sctlr_el3 = read_sctlr();
51 unsigned long bl2_base;
52 unsigned int load_type = TOP_LOAD, spsr;
53 meminfo bl1_tzram_layout, *bl2_tzram_layout = 0x0;
54
55 /*
56 * Ensure that MMU/Caches and coherency are turned on
57 */
58 assert(sctlr_el3 | SCTLR_M_BIT);
59 assert(sctlr_el3 | SCTLR_C_BIT);
60 assert(sctlr_el3 | SCTLR_I_BIT);
61
62 /* Perform remaining generic architectural setup from EL3 */
63 bl1_arch_setup();
64
65 /* Perform platform setup in BL1. */
66 bl1_platform_setup();
67
68 /* Announce our arrival */
69 printf(FIRMWARE_WELCOME_STR);
70 printf("Built : %s, %s\n\r", __TIME__, __DATE__);
71
72 /*
73 * Find out how much free trusted ram remains after BL1 load
74 * & load the BL2 image at its top
75 */
76 bl1_tzram_layout = bl1_get_sec_mem_layout();
77 bl2_base = load_image(&bl1_tzram_layout,
78 (const char *) BL2_IMAGE_NAME,
79 load_type, BL2_BASE);
80
81 /*
82 * Create a new layout of memory for BL2 as seen by BL1 i.e.
83 * tell it the amount of total and free memory available.
84 * This layout is created at the first free address visible
85 * to BL2. BL2 will read the memory layout before using its
86 * memory for other purposes.
87 */
88 bl2_tzram_layout = (meminfo *) bl1_tzram_layout.free_base;
89 init_bl2_mem_layout(&bl1_tzram_layout,
90 bl2_tzram_layout,
91 load_type,
92 bl2_base);
93
94 if (bl2_base) {
95 bl1_arch_next_el_setup();
96 spsr = make_spsr(MODE_EL1, MODE_SP_ELX, MODE_RW_64);
97 printf("Booting trusted firmware boot loader stage 2\n\r");
98#if DEBUG
99 printf("BL2 address = 0x%llx \n\r", (unsigned long long) bl2_base);
100 printf("BL2 cpsr = 0x%x \n\r", spsr);
101 printf("BL2 memory layout address = 0x%llx \n\r",
102 (unsigned long long) bl2_tzram_layout);
103#endif
104 run_image(bl2_base, spsr, SECURE, bl2_tzram_layout, 0);
105 }
106
107 /*
108 * TODO: print failure to load BL2 but also add a tzwdog timer
109 * which will reset the system eventually.
110 */
111 printf("Failed to load boot loader stage 2 (BL2) firmware.\n\r");
112 return;
113}
114
115/*******************************************************************************
116 * Temporary function to print the fact that BL2 has done its job and BL31 is
117 * about to be loaded. This is needed as long as printfs cannot be used
118 ******************************************************************************/
119void display_boot_progress(unsigned long entrypoint,
120 unsigned long spsr,
121 unsigned long mem_layout,
122 unsigned long ns_image_info)
123{
124 printf("Booting trusted firmware boot loader stage 3\n\r");
125#if DEBUG
126 printf("BL31 address = 0x%llx \n\r", (unsigned long long) entrypoint);
127 printf("BL31 cpsr = 0x%llx \n\r", (unsigned long long)spsr);
128 printf("BL31 memory layout address = 0x%llx \n\r", (unsigned long long)mem_layout);
129 printf("BL31 non-trusted image info address = 0x%llx\n\r", (unsigned long long)ns_image_info);
130#endif
131 return;
132}