arch/nds32/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  *
   6  * SPDX-License-Identifier:     GPL-2.0+
   7  */
   8
   9 #include <common.h>
  10 #include <command.h>
  11 #include <image.h>
  12 #include <u-boot/zlib.h>
  13 #include <asm/byteorder.h>
  14 #include <asm/bootm.h>
  15 #include <asm/setup.h>
  16
  17 DECLARE_GLOBAL_DATA_PTR;
  18
  19 int arch_fixup_fdt(void *blob)
  20 {
  21         return 0;
  22 }
  23
  24
  25 #if defined(CONFIG_SETUP_MEMORY_TAGS) || \
  26         defined(CONFIG_CMDLINE_TAG) || \
  27         defined(CONFIG_INITRD_TAG) || \
  28         defined(CONFIG_SERIAL_TAG) || \
  29         defined(CONFIG_REVISION_TAG)
  30 static void setup_start_tag(bd_t *bd);
  31
  32 # ifdef CONFIG_SETUP_MEMORY_TAGS
  33 static void setup_memory_tags(bd_t *bd);
  34 # endif
  35 static void setup_commandline_tag(bd_t *bd, char *commandline);
  36
  37 # ifdef CONFIG_INITRD_TAG
  38 static void setup_initrd_tag(bd_t *bd, ulong initrd_start, ulong initrd_end);
  39 # endif
  40 static void setup_end_tag(bd_t *bd);
  41
  42 static struct tag *params;
  43 #endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */
  44
  45 int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images)
  46 {
  47         bd_t    *bd = gd->bd;
  48         char    *s;
  49         int     machid = bd->bi_arch_number;
  50         void    (*theKernel)(int zero, int arch, uint params);
  51
  52 #ifdef CONFIG_CMDLINE_TAG
  53         char *commandline = env_get("bootargs");
  54 #endif
  55
  56         /*
  57          * allow the PREP bootm subcommand, it is required for bootm to work
  58          */
  59         if (flag & BOOTM_STATE_OS_PREP)
  60                 return 0;
  61
  62         if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
  63                 return 1;
  64
  65         theKernel = (void (*)(int, int, uint))images->ep;
  66
  67         s = env_get("machid");
  68         if (s) {
  69                 machid = simple_strtoul(s, NULL, 16);
  70                 printf("Using machid 0x%x from environment\n", machid);
  71         }
  72
  73         bootstage_mark(BOOTSTAGE_ID_RUN_OS);
  74
  75         debug("## Transferring control to Linux (at address %08lx) ...\n",
  76                (ulong)theKernel);
  77
  78         if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len) {
  79 #ifdef CONFIG_OF_LIBFDT
  80                 debug("using: FDT\n");
  81                 if (image_setup_linux(images)) {
  82                         printf("FDT creation failed! hanging...");
  83                         hang();
  84                 }
  85 #endif
  86         } else if (BOOTM_ENABLE_TAGS) {
  87 #if defined(CONFIG_SETUP_MEMORY_TAGS) || \
  88         defined(CONFIG_CMDLINE_TAG) || \
  89         defined(CONFIG_INITRD_TAG) || \
  90         defined(CONFIG_SERIAL_TAG) || \
  91         defined(CONFIG_REVISION_TAG)
  92         setup_start_tag(bd);
  93 #ifdef CONFIG_SERIAL_TAG
  94         setup_serial_tag(&params);
  95 #endif
  96 #ifdef CONFIG_REVISION_TAG
  97         setup_revision_tag(&params);
  98 #endif
  99 #ifdef CONFIG_SETUP_MEMORY_TAGS
 100         setup_memory_tags(bd);
 101 #endif
 102 #ifdef CONFIG_CMDLINE_TAG
 103         setup_commandline_tag(bd, commandline);
 104 #endif
 105 #ifdef CONFIG_INITRD_TAG
 106         if (images->rd_start && images->rd_end)
 107                 setup_initrd_tag(bd, images->rd_start, images->rd_end);
 108 #endif
 109         setup_end_tag(bd);
 110 #endif
 111
 112         /* we assume that the kernel is in place */
 113         printf("\nStarting kernel ...\n\n");
 114
 115 #ifdef CONFIG_USB_DEVICE
 116         {
 117                 extern void udc_disconnect(void);
 118                 udc_disconnect();
 119         }
 120 #endif
 121         }
 122         cleanup_before_linux();
 123         if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len)
 124                 theKernel(0, machid, (unsigned long)images->ft_addr);
 125         else
 126                 theKernel(0, machid, bd->bi_boot_params);
 127         /* does not return */
 128
 129         return 1;
 130 }
 131
 132 #if defined(CONFIG_SETUP_MEMORY_TAGS) || \
 133         defined(CONFIG_CMDLINE_TAG) || \
 134         defined(CONFIG_INITRD_TAG) || \
 135         defined(CONFIG_SERIAL_TAG) || \
 136         defined(CONFIG_REVISION_TAG)
 137 static void setup_start_tag(bd_t *bd)
 138 {
 139         params = (struct tag *)bd->bi_boot_params;
 140
 141         params->hdr.tag = ATAG_CORE;
 142         params->hdr.size = tag_size(tag_core);
 143
 144         params->u.core.flags = 0;
 145         params->u.core.pagesize = 0;
 146         params->u.core.rootdev = 0;
 147
 148         params = tag_next(params);
 149 }
 150
 151 #ifdef CONFIG_SETUP_MEMORY_TAGS
 152 static void setup_memory_tags(bd_t *bd)
 153 {
 154         int i;
 155
 156         for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
 157                 params->hdr.tag = ATAG_MEM;
 158                 params->hdr.size = tag_size(tag_mem32);
 159
 160                 params->u.mem.start = bd->bi_dram[i].start;
 161                 params->u.mem.size = bd->bi_dram[i].size;
 162
 163                 params = tag_next(params);
 164         }
 165 }
 166 #endif /* CONFIG_SETUP_MEMORY_TAGS */
 167
 168 static void setup_commandline_tag(bd_t *bd, char *commandline)
 169 {
 170         char *p;
 171
 172         if (!commandline)
 173                 return;
 174
 175         /* eat leading white space */
 176         for (p = commandline; *p == ' '; p++)
 177                 ;
 178
 179         /* skip non-existent command lines so the kernel will still
 180          * use its default command line.
 181          */
 182         if (*p == '\0')
 183                 return;
 184
 185         params->hdr.tag = ATAG_CMDLINE;
 186         params->hdr.size =
 187                 (sizeof(struct tag_header) + strlen(p) + 1 + 4) >> 2;
 188
 189         strcpy(params->u.cmdline.cmdline, p)
 190                 ;
 191
 192         params = tag_next(params);
 193 }
 194
 195 #ifdef CONFIG_INITRD_TAG
 196 static void setup_initrd_tag(bd_t *bd, ulong initrd_start, ulong initrd_end)
 197 {
 198         /* an ATAG_INITRD node tells the kernel where the compressed
 199          * ramdisk can be found. ATAG_RDIMG is a better name, actually.
 200          */
 201         params->hdr.tag = ATAG_INITRD2;
 202         params->hdr.size = tag_size(tag_initrd);
 203
 204         params->u.initrd.start = initrd_start;
 205         params->u.initrd.size = initrd_end - initrd_start;
 206
 207         params = tag_next(params);
 208 }
 209 #endif /* CONFIG_INITRD_TAG */
 210
 211 #ifdef CONFIG_SERIAL_TAG
 212 void setup_serial_tag(struct tag **tmp)
 213 {
 214         struct tag *params = *tmp;
 215         struct tag_serialnr serialnr;
 216         void get_board_serial(struct tag_serialnr *serialnr);
 217
 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 rev = 0;
 232         u32 get_board_rev(void);
 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 */