1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Copyright (C) 2011 Andes Technology Corporation 4 * Shawn Lin, Andes Technology Corporation <nobuhiro@andestech.com> 5 * Macpaul Lin, Andes Technology Corporation <macpaul@andestech.com> 6 */ 7 8 #include <common.h> 9 #include <command.h> 10 #include <image.h> 11 #include <u-boot/zlib.h> 12 #include <asm/byteorder.h> 13 #include <asm/bootm.h> 14 15 DECLARE_GLOBAL_DATA_PTR; 16 17 #if defined(CONFIG_SETUP_MEMORY_TAGS) || \ 18 defined(CONFIG_CMDLINE_TAG) || \ 19 defined(CONFIG_INITRD_TAG) || \ 20 defined(CONFIG_SERIAL_TAG) || \ 21 defined(CONFIG_REVISION_TAG) 22 static void setup_start_tag(bd_t *bd); 23 24 # ifdef CONFIG_SETUP_MEMORY_TAGS 25 static void setup_memory_tags(bd_t *bd); 26 # endif 27 static void setup_commandline_tag(bd_t *bd, char *commandline); 28 29 # ifdef CONFIG_INITRD_TAG 30 static void setup_initrd_tag(bd_t *bd, ulong initrd_start, ulong initrd_end); 31 # endif 32 static void setup_end_tag(bd_t *bd); 33 34 static struct tag *params; 35 #endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */ 36 37 int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images) 38 { 39 bd_t *bd = gd->bd; 40 char *s; 41 int machid = bd->bi_arch_number; 42 void (*theKernel)(int zero, int arch, uint params); 43 44 #ifdef CONFIG_CMDLINE_TAG 45 char *commandline = env_get("bootargs"); 46 #endif 47 48 /* 49 * allow the PREP bootm subcommand, it is required for bootm to work 50 */ 51 if (flag & BOOTM_STATE_OS_PREP) 52 return 0; 53 54 if ((flag != 0) && (flag != BOOTM_STATE_OS_GO)) 55 return 1; 56 57 theKernel = (void (*)(int, int, uint))images->ep; 58 59 s = env_get("machid"); 60 if (s) { 61 machid = simple_strtoul(s, NULL, 16); 62 printf("Using machid 0x%x from environment\n", machid); 63 } 64 65 bootstage_mark(BOOTSTAGE_ID_RUN_OS); 66 67 debug("## Transferring control to Linux (at address %08lx) ...\n", 68 (ulong)theKernel); 69 70 if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len) { 71 #ifdef CONFIG_OF_LIBFDT 72 debug("using: FDT\n"); 73 if (image_setup_linux(images)) { 74 printf("FDT creation failed! hanging..."); 75 hang(); 76 } 77 #endif 78 } else if (BOOTM_ENABLE_TAGS) { 79 #if defined(CONFIG_SETUP_MEMORY_TAGS) || \ 80 defined(CONFIG_CMDLINE_TAG) || \ 81 defined(CONFIG_INITRD_TAG) || \ 82 defined(CONFIG_SERIAL_TAG) || \ 83 defined(CONFIG_REVISION_TAG) 84 setup_start_tag(bd); 85 #ifdef CONFIG_SERIAL_TAG 86 setup_serial_tag(¶ms); 87 #endif 88 #ifdef CONFIG_REVISION_TAG 89 setup_revision_tag(¶ms); 90 #endif 91 #ifdef CONFIG_SETUP_MEMORY_TAGS 92 setup_memory_tags(bd); 93 #endif 94 #ifdef CONFIG_CMDLINE_TAG 95 setup_commandline_tag(bd, commandline); 96 #endif 97 #ifdef CONFIG_INITRD_TAG 98 if (images->rd_start && images->rd_end) 99 setup_initrd_tag(bd, images->rd_start, images->rd_end); 100 #endif 101 setup_end_tag(bd); 102 #endif 103 104 /* we assume that the kernel is in place */ 105 printf("\nStarting kernel ...\n\n"); 106 107 #ifdef CONFIG_USB_DEVICE 108 { 109 extern void udc_disconnect(void); 110 udc_disconnect(); 111 } 112 #endif 113 } 114 cleanup_before_linux(); 115 if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len) 116 theKernel(0, machid, (unsigned long)images->ft_addr); 117 else 118 theKernel(0, machid, bd->bi_boot_params); 119 /* does not return */ 120 121 return 1; 122 } 123 124 #if defined(CONFIG_SETUP_MEMORY_TAGS) || \ 125 defined(CONFIG_CMDLINE_TAG) || \ 126 defined(CONFIG_INITRD_TAG) || \ 127 defined(CONFIG_SERIAL_TAG) || \ 128 defined(CONFIG_REVISION_TAG) 129 static void setup_start_tag(bd_t *bd) 130 { 131 params = (struct tag *)bd->bi_boot_params; 132 133 params->hdr.tag = ATAG_CORE; 134 params->hdr.size = tag_size(tag_core); 135 136 params->u.core.flags = 0; 137 params->u.core.pagesize = 0; 138 params->u.core.rootdev = 0; 139 140 params = tag_next(params); 141 } 142 143 #ifdef CONFIG_SETUP_MEMORY_TAGS 144 static void setup_memory_tags(bd_t *bd) 145 { 146 int i; 147 148 for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) { 149 params->hdr.tag = ATAG_MEM; 150 params->hdr.size = tag_size(tag_mem32); 151 152 params->u.mem.start = bd->bi_dram[i].start; 153 params->u.mem.size = bd->bi_dram[i].size; 154 155 params = tag_next(params); 156 } 157 } 158 #endif /* CONFIG_SETUP_MEMORY_TAGS */ 159 160 static void setup_commandline_tag(bd_t *bd, char *commandline) 161 { 162 char *p; 163 164 if (!commandline) 165 return; 166 167 /* eat leading white space */ 168 for (p = commandline; *p == ' '; p++) 169 ; 170 171 /* skip non-existent command lines so the kernel will still 172 * use its default command line. 173 */ 174 if (*p == '\0') 175 return; 176 177 params->hdr.tag = ATAG_CMDLINE; 178 params->hdr.size = 179 (sizeof(struct tag_header) + strlen(p) + 1 + 4) >> 2; 180 181 strcpy(params->u.cmdline.cmdline, p) 182 ; 183 184 params = tag_next(params); 185 } 186 187 #ifdef CONFIG_INITRD_TAG 188 static void setup_initrd_tag(bd_t *bd, ulong initrd_start, ulong initrd_end) 189 { 190 /* an ATAG_INITRD node tells the kernel where the compressed 191 * ramdisk can be found. ATAG_RDIMG is a better name, actually. 192 */ 193 params->hdr.tag = ATAG_INITRD2; 194 params->hdr.size = tag_size(tag_initrd); 195 196 params->u.initrd.start = initrd_start; 197 params->u.initrd.size = initrd_end - initrd_start; 198 199 params = tag_next(params); 200 } 201 #endif /* CONFIG_INITRD_TAG */ 202 203 #ifdef CONFIG_SERIAL_TAG 204 void setup_serial_tag(struct tag **tmp) 205 { 206 struct tag *params = *tmp; 207 struct tag_serialnr serialnr; 208 void get_board_serial(struct tag_serialnr *serialnr); 209 210 get_board_serial(&serialnr); 211 params->hdr.tag = ATAG_SERIAL; 212 params->hdr.size = tag_size(tag_serialnr); 213 params->u.serialnr.low = serialnr.low; 214 params->u.serialnr.high = serialnr.high; 215 params = tag_next(params); 216 *tmp = params; 217 } 218 #endif 219 220 #ifdef CONFIG_REVISION_TAG 221 void setup_revision_tag(struct tag **in_params) 222 { 223 u32 rev = 0; 224 u32 get_board_rev(void); 225 226 rev = get_board_rev(); 227 params->hdr.tag = ATAG_REVISION; 228 params->hdr.size = tag_size(tag_revision); 229 params->u.revision.rev = rev; 230 params = tag_next(params); 231 } 232 #endif /* CONFIG_REVISION_TAG */ 233 234 static void setup_end_tag(bd_t *bd) 235 { 236 params->hdr.tag = ATAG_NONE; 237 params->hdr.size = 0; 238 } 239 240 #endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */ 241