hw/xtensa/bootparam.h

   1 #ifndef HW_XTENSA_BOOTPARAM_H
   2 #define HW_XTENSA_BOOTPARAM_H
   3
   4 #define BP_TAG_COMMAND_LINE     0x1001  /* command line (0-terminated string)*/
   5 #define BP_TAG_INITRD           0x1002  /* ramdisk addr and size (bp_meminfo) */
   6 #define BP_TAG_MEMORY           0x1003  /* memory addr and size (bp_meminfo) */
   7 #define BP_TAG_SERIAL_BAUDRATE  0x1004  /* baud rate of current console. */
   8 #define BP_TAG_SERIAL_PORT      0x1005  /* serial device of current console */
   9 #define BP_TAG_FDT              0x1006  /* flat device tree addr */
  10
  11 #define BP_TAG_FIRST            0x7B0B  /* first tag with a version number */
  12 #define BP_TAG_LAST             0x7E0B  /* last tag */
  13
  14 typedef struct BpTag {
  15     uint16_t tag;
  16     uint16_t size;
  17 } BpTag;
  18
  19 typedef struct BpMemInfo {
  20     uint32_t type;
  21     uint32_t start;
  22     uint32_t end;
  23 } BpMemInfo;
  24
  25 #define MEMORY_TYPE_CONVENTIONAL        0x1000
  26 #define MEMORY_TYPE_NONE                0x2000
  27
  28 static inline size_t get_tag_size(size_t data_size)
  29 {
  30     return data_size + sizeof(BpTag) + 4;
  31 }
  32
  33 static inline ram_addr_t put_tag(ram_addr_t addr, uint16_t tag,
  34         size_t size, const void *data)
  35 {
  36     BpTag bp_tag = {
  37         .tag = tswap16(tag),
  38         .size = tswap16((size + 3) & ~3),
  39     };
  40
  41     cpu_physical_memory_write(addr, &bp_tag, sizeof(bp_tag));
  42     addr += sizeof(bp_tag);
  43     cpu_physical_memory_write(addr, data, size);
  44     addr += (size + 3) & ~3;
  45
  46     return addr;
  47 }
  48
  49 #endif