hw/xtensa/bootparam.h

   1 #ifndef HW_XTENSA_BOOTPARAM_H
   2 #define HW_XTENSA_BOOTPARAM_H
   3
   4 #include "exec/cpu-common.h"
   5
   6 #define BP_TAG_COMMAND_LINE     0x1001  /* command line (0-terminated string)*/
   7 #define BP_TAG_INITRD           0x1002  /* ramdisk addr and size (bp_meminfo) */
   8 #define BP_TAG_MEMORY           0x1003  /* memory addr and size (bp_meminfo) */
   9 #define BP_TAG_SERIAL_BAUDRATE  0x1004  /* baud rate of current console. */
  10 #define BP_TAG_SERIAL_PORT      0x1005  /* serial device of current console */
  11 #define BP_TAG_FDT              0x1006  /* flat device tree addr */
  12
  13 #define BP_TAG_FIRST            0x7B0B  /* first tag with a version number */
  14 #define BP_TAG_LAST             0x7E0B  /* last tag */
  15
  16 typedef struct BpTag {
  17     uint16_t tag;
  18     uint16_t size;
  19 } BpTag;
  20
  21 typedef struct BpMemInfo {
  22     uint32_t type;
  23     uint32_t start;
  24     uint32_t end;
  25 } BpMemInfo;
  26
  27 #define MEMORY_TYPE_CONVENTIONAL        0x1000
  28 #define MEMORY_TYPE_NONE                0x2000
  29
  30 static inline size_t get_tag_size(size_t data_size)
  31 {
  32     return data_size + sizeof(BpTag) + 4;
  33 }
  34
  35 static inline ram_addr_t put_tag(ram_addr_t addr, uint16_t tag,
  36         size_t size, const void *data)
  37 {
  38     BpTag bp_tag = {
  39         .tag = tswap16(tag),
  40         .size = tswap16((size + 3) & ~3),
  41     };
  42
  43     cpu_physical_memory_write(addr, &bp_tag, sizeof(bp_tag));
  44     addr += sizeof(bp_tag);
  45     cpu_physical_memory_write(addr, data, size);
  46     addr += (size + 3) & ~3;
  47
  48     return addr;
  49 }
  50
  51 #endif