LXR qemu/include/hw/nvram/openbios_firmware

   1#ifndef FIRMWARE_ABI_H
   2#define FIRMWARE_ABI_H
   3
   4/* OpenBIOS NVRAM partition */
   5struct OpenBIOS_nvpart_v1 {
   6    uint8_t signature;
   7    uint8_t checksum;
   8    uint16_t len; // BE, length divided by 16
   9    char name[12];
  10};
  11
  12#define OPENBIOS_PART_SYSTEM 0x70
  13#define OPENBIOS_PART_FREE 0x7f
  14
  15static inline void
  16OpenBIOS_finish_partition(struct OpenBIOS_nvpart_v1 *header, uint32_t size)
  17{
  18    unsigned int i, sum;
  19    uint8_t *tmpptr;
  20
  21    // Length divided by 16
  22    header->len = cpu_to_be16(size >> 4);
  23
  24    // Checksum
  25    tmpptr = (uint8_t *)header;
  26    sum = *tmpptr;
  27    for (i = 0; i < 14; i++) {
  28        sum += tmpptr[2 + i];
  29        sum = (sum + ((sum & 0xff00) >> 8)) & 0xff;
  30    }
  31    header->checksum = sum & 0xff;
  32}
  33
  34static inline uint32_t
  35OpenBIOS_set_var(uint8_t *nvram, uint32_t addr, const char *str)
  36{
  37    uint32_t len;
  38
  39    len = strlen(str) + 1;
  40    memcpy(&nvram[addr], str, len);
  41
  42    return addr + len;
  43}
  44
  45/* Sun IDPROM structure at the end of NVRAM */
  46/* from http://www.squirrel.com/squirrel/sun-nvram-hostid.faq.html */
  47struct Sun_nvram {
  48    uint8_t type;       /* always 01 */
  49    uint8_t machine_id; /* first byte of host id (machine type) */
  50    uint8_t macaddr[6]; /* 6 byte ethernet address (first 3 bytes 08, 00, 20) */
  51    uint8_t date[4];    /* date of manufacture */
  52    uint8_t hostid[3];  /* remaining 3 bytes of host id (serial number) */
  53    uint8_t checksum;   /* bitwise xor of previous bytes */
  54};
  55
  56static inline void
  57Sun_init_header(struct Sun_nvram *header, const uint8_t *macaddr, int machine_id)
  58{
  59    uint8_t tmp, *tmpptr;
  60    unsigned int i;
  61
  62    header->type = 1;
  63    header->machine_id = machine_id & 0xff;
  64    memcpy(&header->macaddr, macaddr, 6);
  65    memcpy(&header->hostid , &macaddr[3], 3);
  66
  67    /* Calculate checksum */
  68    tmp = 0;
  69    tmpptr = (uint8_t *)header;
  70    for (i = 0; i < 15; i++)
  71        tmp ^= tmpptr[i];
  72
  73    header->checksum = tmp;
  74}
  75#endif /* FIRMWARE_ABI_H */
  76