76 lines
1.9 KiB
C
76 lines
1.9 KiB
C
#ifndef FIRMWARE_ABI_H
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#define FIRMWARE_ABI_H
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/* OpenBIOS NVRAM partition */
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struct OpenBIOS_nvpart_v1 {
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uint8_t signature;
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uint8_t checksum;
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uint16_t len; // BE, length divided by 16
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char name[12];
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};
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#define OPENBIOS_PART_SYSTEM 0x70
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#define OPENBIOS_PART_FREE 0x7f
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static inline void
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OpenBIOS_finish_partition(struct OpenBIOS_nvpart_v1 *header, uint32_t size)
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{
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unsigned int i, sum;
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uint8_t *tmpptr;
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// Length divided by 16
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header->len = cpu_to_be16(size >> 4);
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// Checksum
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tmpptr = (uint8_t *)header;
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sum = *tmpptr;
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for (i = 0; i < 14; i++) {
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sum += tmpptr[2 + i];
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sum = (sum + ((sum & 0xff00) >> 8)) & 0xff;
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}
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header->checksum = sum & 0xff;
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}
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static inline uint32_t
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OpenBIOS_set_var(uint8_t *nvram, uint32_t addr, const char *str)
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{
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uint32_t len;
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len = strlen(str) + 1;
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memcpy(&nvram[addr], str, len);
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return addr + len;
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}
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/* Sun IDPROM structure at the end of NVRAM */
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/* from http://www.squirrel.com/squirrel/sun-nvram-hostid.faq.html */
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struct Sun_nvram {
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uint8_t type; /* always 01 */
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uint8_t machine_id; /* first byte of host id (machine type) */
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uint8_t macaddr[6]; /* 6 byte ethernet address (first 3 bytes 08, 00, 20) */
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uint8_t date[4]; /* date of manufacture */
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uint8_t hostid[3]; /* remaining 3 bytes of host id (serial number) */
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uint8_t checksum; /* bitwise xor of previous bytes */
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};
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static inline void
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Sun_init_header(struct Sun_nvram *header, const uint8_t *macaddr, int machine_id)
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{
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uint8_t tmp, *tmpptr;
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unsigned int i;
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header->type = 1;
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header->machine_id = machine_id & 0xff;
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memcpy(&header->macaddr, macaddr, 6);
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memcpy(&header->hostid , &macaddr[3], 3);
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/* Calculate checksum */
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tmp = 0;
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tmpptr = (uint8_t *)header;
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for (i = 0; i < 15; i++)
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tmp ^= tmpptr[i];
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header->checksum = tmp;
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}
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#endif /* FIRMWARE_ABI_H */
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