arch/riscv/lib/bootm.c

   1 /*
   2  * Copyright (C) 2011 Andes Technology Corporation
   3  * Shawn Lin, Andes Technology Corporation <nobuhiro@andestech.com>
   4  * Macpaul Lin, Andes Technology Corporation <macpaul@andestech.com>
   5  * Rick Chen, Andes Technology Corporation <rick@andestech.com>
   6  *
   7  * SPDX-License-Identifier:     GPL-2.0+
   8  */
   9
  10 #include <common.h>
  11 #include <command.h>
  12 #include <image.h>
  13 #include <u-boot/zlib.h>
  14 #include <asm/byteorder.h>
  15 #include <asm/bootm.h>
  16
  17 DECLARE_GLOBAL_DATA_PTR;
  18
  19 int arch_fixup_fdt(void *blob)
  20 {
  21         return 0;
  22 }
  23
  24 #if defined(CONFIG_SETUP_MEMORY_TAGS) || \
  25         defined(CONFIG_CMDLINE_TAG) || \
  26         defined(CONFIG_INITRD_TAG) || \
  27         defined(CONFIG_SERIAL_TAG) || \
  28         defined(CONFIG_REVISION_TAG)
  29 static void setup_start_tag(bd_t *bd);
  30
  31 # ifdef CONFIG_SETUP_MEMORY_TAGS
  32 static void setup_memory_tags(bd_t *bd);
  33 # endif
  34 static void setup_commandline_tag(bd_t *bd, char *commandline);
  35
  36 # ifdef CONFIG_INITRD_TAG
  37 static void setup_initrd_tag(bd_t *bd, ulong initrd_start, ulong initrd_end);
  38 # endif
  39 static void setup_end_tag(bd_t *bd);
  40
  41 static struct tag *params;
  42 #endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */
  43
  44 int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images)
  45 {
  46         bd_t    *bd = gd->bd;
  47         char    *s;
  48         int     machid = bd->bi_arch_number;
  49         void    (*theKernel)(int arch, uint params);
  50
  51 #ifdef CONFIG_CMDLINE_TAG
  52         char *commandline = env_get("bootargs");
  53 #endif
  54
  55         /*
  56          * allow the PREP bootm subcommand, it is required for bootm to work
  57          */
  58         if (flag & BOOTM_STATE_OS_PREP)
  59                 return 0;
  60
  61         if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
  62                 return 1;
  63
  64         theKernel = (void (*)(int, uint))images->ep;
  65
  66         s = env_get("machid");
  67         if (s) {
  68                 machid = simple_strtoul(s, NULL, 16);
  69                 printf("Using machid 0x%x from environment\n", machid);
  70         }
  71
  72         bootstage_mark(BOOTSTAGE_ID_RUN_OS);
  73
  74         debug("## Transferring control to Linux (at address %08lx) ...\n",
  75                (ulong)theKernel);
  76
  77         if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len) {
  78 #ifdef CONFIG_OF_LIBFDT
  79                 debug("using: FDT\n");
  80                 if (image_setup_linux(images)) {
  81                         printf("FDT creation failed! hanging...");
  82                         hang();
  83                 }
  84 #endif
  85         } else if (BOOTM_ENABLE_TAGS) {
  86 #if defined(CONFIG_SETUP_MEMORY_TAGS) || \
  87         defined(CONFIG_CMDLINE_TAG) || \
  88         defined(CONFIG_INITRD_TAG) || \
  89         defined(CONFIG_SERIAL_TAG) || \
  90         defined(CONFIG_REVISION_TAG)
  91         setup_start_tag(bd);
  92 #ifdef CONFIG_SERIAL_TAG
  93         setup_serial_tag(&params);
  94 #endif
  95 #ifdef CONFIG_REVISION_TAG
  96         setup_revision_tag(&params);
  97 #endif
  98 #ifdef CONFIG_SETUP_MEMORY_TAGS
  99         setup_memory_tags(bd);
 100 #endif
 101 #ifdef CONFIG_CMDLINE_TAG
 102         setup_commandline_tag(bd, commandline);
 103 #endif
 104 #ifdef CONFIG_INITRD_TAG
 105         if (images->rd_start && images->rd_end)
 106                 setup_initrd_tag(bd, images->rd_start, images->rd_end);
 107 #endif
 108         setup_end_tag(bd);
 109 #endif
 110
 111         /* we assume that the kernel is in place */
 112         printf("\nStarting kernel ...\n\n");
 113
 114 #ifdef CONFIG_USB_DEVICE
 115         {
 116                 extern void udc_disconnect(void);
 117                 udc_disconnect();
 118         }
 119 #endif
 120         }
 121         cleanup_before_linux();
 122         if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len)
 123                 theKernel(machid, (unsigned long)images->ft_addr);
 124         else
 125         theKernel(machid, bd->bi_boot_params);
 126         /* does not return */
 127
 128         return 1;
 129 }
 130
 131 #if defined(CONFIG_SETUP_MEMORY_TAGS) || \
 132         defined(CONFIG_CMDLINE_TAG) || \
 133         defined(CONFIG_INITRD_TAG) || \
 134         defined(CONFIG_SERIAL_TAG) || \
 135         defined(CONFIG_REVISION_TAG)
 136 static void setup_start_tag(bd_t *bd)
 137 {
 138         params = (struct tag *)bd->bi_boot_params;
 139
 140         params->hdr.tag = ATAG_CORE;
 141         params->hdr.size = tag_size(tag_core);
 142
 143         params->u.core.flags = 0;
 144         params->u.core.pagesize = 0;
 145         params->u.core.rootdev = 0;
 146
 147         params = tag_next(params);
 148 }
 149
 150 #ifdef CONFIG_SETUP_MEMORY_TAGS
 151 static void setup_memory_tags(bd_t *bd)
 152 {
 153         int i;
 154
 155         for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
 156                 params->hdr.tag = ATAG_MEM;
 157                 params->hdr.size = tag_size(tag_mem32);
 158
 159                 params->u.mem.start = bd->bi_dram[i].start;
 160                 params->u.mem.size = bd->bi_dram[i].size;
 161
 162                 params = tag_next(params);
 163         }
 164 }
 165 #endif /* CONFIG_SETUP_MEMORY_TAGS */
 166
 167 static void setup_commandline_tag(bd_t *bd, char *commandline)
 168 {
 169         char *p;
 170
 171         if (!commandline)
 172                 return;
 173
 174         /* eat leading white space */
 175         for (p = commandline; *p == ' '; p++)
 176                 ;
 177
 178         /* skip non-existent command lines so the kernel will still
 179          * use its default command line.
 180          */
 181         if (*p == '\0')
 182                 return;
 183
 184         params->hdr.tag = ATAG_CMDLINE;
 185         params->hdr.size =
 186                 (sizeof(struct tag_header) + strlen(p) + 1 + 4) >> 2;
 187
 188         strcpy(params->u.cmdline.cmdline, p)
 189                 ;
 190
 191         params = tag_next(params);
 192 }
 193
 194 #ifdef CONFIG_INITRD_TAG
 195 static void setup_initrd_tag(bd_t *bd, ulong initrd_start, ulong initrd_end)
 196 {
 197         /* an ATAG_INITRD node tells the kernel where the compressed
 198          * ramdisk can be found. ATAG_RDIMG is a better name, actually.
 199          */
 200         params->hdr.tag = ATAG_INITRD2;
 201         params->hdr.size = tag_size(tag_initrd);
 202
 203         params->u.initrd.start = initrd_start;
 204         params->u.initrd.size = initrd_end - initrd_start;
 205
 206         params = tag_next(params);
 207 }
 208 #endif /* CONFIG_INITRD_TAG */
 209
 210 #ifdef CONFIG_SERIAL_TAG
 211 void setup_serial_tag(struct tag **tmp)
 212 {
 213         void get_board_serial(struct tag_serialnr *serialnr);
 214         struct tag *params;
 215         struct tag_serialnr serialnr;
 216
 217         params = *tmp;
 218         get_board_serial(&serialnr);
 219         params->hdr.tag = ATAG_SERIAL;
 220         params->hdr.size = tag_size(tag_serialnr);
 221         params->u.serialnr.low = serialnr.low;
 222         params->u.serialnr.high = serialnr.high;
 223         params = tag_next(params);
 224         *tmp = params;
 225 }
 226 #endif
 227
 228 #ifdef CONFIG_REVISION_TAG
 229 void setup_revision_tag(struct tag **in_params)
 230 {
 231         u32 get_board_rev(void);
 232         u32 rev;
 233
 234         rev = get_board_rev();
 235         params->hdr.tag = ATAG_REVISION;
 236         params->hdr.size = tag_size(tag_revision);
 237         params->u.revision.rev = rev;
 238         params = tag_next(params);
 239 }
 240 #endif  /* CONFIG_REVISION_TAG */
 241
 242 static void setup_end_tag(bd_t *bd)
 243 {
 244         params->hdr.tag = ATAG_NONE;
 245         params->hdr.size = 0;
 246 }
 247
 248 #endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */