Archipelago » qemu

#ifndef FIRMWARE_ABI_H

#define FIRMWARE_ABI_H

/* OpenBIOS NVRAM partition */

struct OpenBIOS_nvpart_v1 {

    uint8_t signature;

    uint8_t checksum;

    uint16_t len; // BE, length divided by 16

    char name[12];

};

#define OPENBIOS_PART_SYSTEM 0x70

#define OPENBIOS_PART_FREE 0x7f

static inline void

OpenBIOS_finish_partition(struct OpenBIOS_nvpart_v1 *header, uint32_t size)

{

    unsigned int i, sum;

    uint8_t *tmpptr;

    // Length divided by 16

    header->len = cpu_to_be16(size >> 4);

    // Checksum

    tmpptr = (uint8_t *)header;

    sum = *tmpptr;

    for (i = 0; i < 14; i++) {

        sum += tmpptr[2 + i];

        sum = (sum + ((sum & 0xff00) >> 8)) & 0xff;

    }

    header->checksum = sum & 0xff;

}

static inline uint32_t

OpenBIOS_set_var(uint8_t *nvram, uint32_t addr, const char *str)

{

    uint32_t len;

    len = strlen(str) + 1;

    memcpy(&nvram[addr], str, len);

    return addr + len;

}

/* Sun IDPROM structure at the end of NVRAM */

/* from http://www.squirrel.com/squirrel/sun-nvram-hostid.faq.html */

struct Sun_nvram {

    uint8_t type;       /* always 01 */

    uint8_t machine_id; /* first byte of host id (machine type) */

    uint8_t macaddr[6]; /* 6 byte ethernet address (first 3 bytes 08, 00, 20) */

    uint8_t date[4];    /* date of manufacture */

    uint8_t hostid[3];  /* remaining 3 bytes of host id (serial number) */

    uint8_t checksum;   /* bitwise xor of previous bytes */

};

static inline void

Sun_init_header(struct Sun_nvram *header, const uint8_t *macaddr, int machine_id)

{

    uint8_t tmp, *tmpptr;

    unsigned int i;

    header->type = 1;

    header->machine_id = machine_id & 0xff;

    memcpy(&header->macaddr, macaddr, 6);

    /* Calculate checksum */

    tmp = 0;

    tmpptr = (uint8_t *)header;

    for (i = 0; i < 15; i++)

        tmp ^= tmpptr[i];

    header->checksum = tmp;

}

#endif /* FIRMWARE_ABI_H */