Chris Zankel | 1387dab | 2016-08-10 18:36:44 +0300 | [diff] [blame] | 1 | /* |
| 2 | * (C) Copyright 2008 - 2013 Tensilica Inc. |
| 3 | * (C) Copyright 2014 Cadence Design Systems Inc. |
| 4 | * |
| 5 | * SPDX-License-Identifier: GPL-2.0+ |
| 6 | */ |
| 7 | |
| 8 | #include <common.h> |
| 9 | #include <command.h> |
| 10 | #include <u-boot/zlib.h> |
| 11 | #include <asm/byteorder.h> |
| 12 | #include <asm/addrspace.h> |
| 13 | #include <asm/bootparam.h> |
| 14 | #include <asm/cache.h> |
| 15 | #include <image.h> |
| 16 | |
| 17 | DECLARE_GLOBAL_DATA_PTR; |
| 18 | |
| 19 | /* |
| 20 | * Setup boot-parameters. |
| 21 | */ |
| 22 | |
| 23 | static struct bp_tag *setup_first_tag(struct bp_tag *params) |
| 24 | { |
| 25 | params->id = BP_TAG_FIRST; |
| 26 | params->size = sizeof(long); |
| 27 | *(unsigned long *)¶ms->data = BP_VERSION; |
| 28 | |
| 29 | return bp_tag_next(params); |
| 30 | } |
| 31 | |
| 32 | static struct bp_tag *setup_last_tag(struct bp_tag *params) |
| 33 | { |
| 34 | params->id = BP_TAG_LAST; |
| 35 | params->size = 0; |
| 36 | |
| 37 | return bp_tag_next(params); |
| 38 | } |
| 39 | |
| 40 | static struct bp_tag *setup_memory_tag(struct bp_tag *params) |
| 41 | { |
| 42 | struct bd_info *bd = gd->bd; |
| 43 | struct meminfo *mem; |
| 44 | |
| 45 | params->id = BP_TAG_MEMORY; |
| 46 | params->size = sizeof(struct meminfo); |
| 47 | mem = (struct meminfo *)params->data; |
| 48 | mem->type = MEMORY_TYPE_CONVENTIONAL; |
| 49 | mem->start = bd->bi_memstart; |
| 50 | mem->end = bd->bi_memstart + bd->bi_memsize; |
| 51 | |
| 52 | printf(" MEMORY: tag:0x%04x, type:0X%lx, start:0X%lx, end:0X%lx\n", |
| 53 | BP_TAG_MEMORY, mem->type, mem->start, mem->end); |
| 54 | |
| 55 | return bp_tag_next(params); |
| 56 | } |
| 57 | |
| 58 | static struct bp_tag *setup_commandline_tag(struct bp_tag *params, |
| 59 | char *cmdline) |
| 60 | { |
| 61 | int len; |
| 62 | |
| 63 | if (!cmdline) |
| 64 | return params; |
| 65 | |
| 66 | len = strlen(cmdline); |
| 67 | |
| 68 | params->id = BP_TAG_COMMAND_LINE; |
| 69 | params->size = (len + 3) & -4; |
| 70 | strcpy((char *)params->data, cmdline); |
| 71 | |
| 72 | printf(" COMMAND_LINE: tag:0x%04x, size:%u, data:'%s'\n", |
| 73 | BP_TAG_COMMAND_LINE, params->size, cmdline); |
| 74 | |
| 75 | return bp_tag_next(params); |
| 76 | } |
| 77 | |
| 78 | static struct bp_tag *setup_ramdisk_tag(struct bp_tag *params, |
| 79 | unsigned long rd_start, |
| 80 | unsigned long rd_end) |
| 81 | { |
| 82 | struct meminfo *mem; |
| 83 | |
| 84 | if (rd_start == rd_end) |
| 85 | return params; |
| 86 | |
| 87 | /* Add a single banked memory */ |
| 88 | |
| 89 | params->id = BP_TAG_INITRD; |
| 90 | params->size = sizeof(struct meminfo); |
| 91 | |
| 92 | mem = (struct meminfo *)params->data; |
| 93 | mem->type = MEMORY_TYPE_CONVENTIONAL; |
| 94 | mem->start = PHYSADDR(rd_start); |
| 95 | mem->end = PHYSADDR(rd_end); |
| 96 | |
| 97 | printf(" INITRD: tag:0x%x, type:0X%04lx, start:0X%lx, end:0X%lx\n", |
| 98 | BP_TAG_INITRD, mem->type, mem->start, mem->end); |
| 99 | |
| 100 | return bp_tag_next(params); |
| 101 | } |
| 102 | |
| 103 | static struct bp_tag *setup_serial_tag(struct bp_tag *params) |
| 104 | { |
| 105 | params->id = BP_TAG_SERIAL_BAUDRATE; |
| 106 | params->size = sizeof(unsigned long); |
| 107 | params->data[0] = gd->baudrate; |
| 108 | |
| 109 | printf(" SERIAL_BAUDRATE: tag:0x%04x, size:%u, baudrate:%lu\n", |
| 110 | BP_TAG_SERIAL_BAUDRATE, params->size, params->data[0]); |
| 111 | |
| 112 | return bp_tag_next(params); |
| 113 | } |
| 114 | |
| 115 | #ifdef CONFIG_OF_LIBFDT |
| 116 | |
| 117 | static struct bp_tag *setup_fdt_tag(struct bp_tag *params, void *fdt_start) |
| 118 | { |
| 119 | params->id = BP_TAG_FDT; |
| 120 | params->size = sizeof(unsigned long); |
| 121 | params->data[0] = (unsigned long)fdt_start; |
| 122 | |
| 123 | printf(" FDT: tag:0x%04x, size:%u, start:0x%lx\n", |
| 124 | BP_TAG_FDT, params->size, params->data[0]); |
| 125 | |
| 126 | return bp_tag_next(params); |
| 127 | } |
| 128 | |
| 129 | #endif |
| 130 | |
| 131 | /* |
| 132 | * Boot Linux. |
| 133 | */ |
| 134 | |
| 135 | int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images) |
| 136 | { |
| 137 | struct bp_tag *params, *params_start; |
| 138 | ulong initrd_start, initrd_end; |
| 139 | char *commandline = getenv("bootargs"); |
| 140 | |
| 141 | if (!(flag & (BOOTM_STATE_OS_GO | BOOTM_STATE_OS_FAKE_GO))) |
| 142 | return 0; |
| 143 | |
| 144 | show_boot_progress(15); |
| 145 | |
| 146 | if (images->rd_start) { |
| 147 | initrd_start = images->rd_start; |
| 148 | initrd_end = images->rd_end; |
| 149 | } else { |
| 150 | initrd_start = 0; |
| 151 | initrd_end = 0; |
| 152 | } |
| 153 | |
| 154 | params_start = (struct bp_tag *)gd->bd->bi_boot_params; |
| 155 | params = params_start; |
| 156 | params = setup_first_tag(params); |
| 157 | params = setup_memory_tag(params); |
| 158 | params = setup_commandline_tag(params, commandline); |
| 159 | params = setup_serial_tag(params); |
| 160 | |
| 161 | if (initrd_start) |
| 162 | params = setup_ramdisk_tag(params, initrd_start, initrd_end); |
| 163 | |
| 164 | #ifdef CONFIG_OF_LIBFDT |
| 165 | if (images->ft_addr) |
| 166 | params = setup_fdt_tag(params, images->ft_addr); |
| 167 | #endif |
| 168 | |
| 169 | printf("\n"); |
| 170 | |
| 171 | params = setup_last_tag(params); |
| 172 | |
| 173 | show_boot_progress(15); |
| 174 | |
| 175 | printf("Transferring Control to Linux @0x%08lx ...\n\n", |
| 176 | (ulong)images->ep); |
| 177 | |
| 178 | flush_dcache_range((unsigned long)params_start, (unsigned long)params); |
| 179 | |
| 180 | if (flag & BOOTM_STATE_OS_FAKE_GO) |
| 181 | return 0; |
| 182 | |
| 183 | /* |
| 184 | * _start() in vmlinux expects boot params in register a2. |
| 185 | * NOTE: |
| 186 | * Disable/delete your u-boot breakpoints before stepping into linux. |
| 187 | */ |
| 188 | asm volatile ("mov a2, %0\n\t" |
| 189 | "jx %1\n\t" |
| 190 | : : "a" (params_start), "a" (images->ep) |
| 191 | : "a2"); |
| 192 | |
| 193 | /* Does not return */ |
| 194 | |
| 195 | return 1; |
| 196 | } |
| 197 | |