diff options
Diffstat (limited to 'hw/sun4u.c')
| -rw-r--r-- | hw/sun4u.c | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/hw/sun4u.c b/hw/sun4u.c index b10722f6e6..952beff3cd 100644 --- a/hw/sun4u.c +++ b/hw/sun4u.c @@ -170,6 +170,34 @@ uint16_t NVRAM_compute_crc (m48t59_t *nvram, uint32_t start, uint32_t count) return crc; } +static uint32_t nvram_set_var (m48t59_t *nvram, uint32_t addr, + const unsigned char *str) +{ + uint32_t len; + + len = strlen(str) + 1; + NVRAM_set_string(nvram, addr, str, len); + + return addr + len; +} + +static void nvram_finish_partition (m48t59_t *nvram, uint32_t start, + uint32_t end) +{ + unsigned int i, sum; + + // Length divided by 16 + m48t59_write(nvram, start + 2, ((end - start) >> 12) & 0xff); + m48t59_write(nvram, start + 3, ((end - start) >> 4) & 0xff); + // Checksum + sum = m48t59_read(nvram, start); + for (i = 0; i < 14; i++) { + sum += m48t59_read(nvram, start + 2 + i); + sum = (sum + ((sum & 0xff00) >> 8)) & 0xff; + } + m48t59_write(nvram, start + 1, sum & 0xff); +} + extern int nographic; int sun4u_NVRAM_set_params (m48t59_t *nvram, uint16_t NVRAM_size, @@ -182,6 +210,8 @@ int sun4u_NVRAM_set_params (m48t59_t *nvram, uint16_t NVRAM_size, int width, int height, int depth) { uint16_t crc; + unsigned int i; + uint32_t start, end; /* Set parameters for Open Hack'Ware BIOS */ NVRAM_set_string(nvram, 0x00, "QEMU_BIOS", 16); @@ -212,6 +242,28 @@ int sun4u_NVRAM_set_params (m48t59_t *nvram, uint16_t NVRAM_size, crc = NVRAM_compute_crc(nvram, 0x00, 0xF8); NVRAM_set_word(nvram, 0xFC, crc); + // OpenBIOS nvram variables + // Variable partition + start = 252; + m48t59_write(nvram, start, 0x70); + NVRAM_set_string(nvram, start + 4, "system", 12); + + end = start + 16; + for (i = 0; i < nb_prom_envs; i++) + end = nvram_set_var(nvram, end, prom_envs[i]); + + m48t59_write(nvram, end++ , 0); + end = start + ((end - start + 15) & ~15); + nvram_finish_partition(nvram, start, end); + + // free partition + start = end; + m48t59_write(nvram, start, 0x7f); + NVRAM_set_string(nvram, start + 4, "free", 12); + + end = 0x1fd0; + nvram_finish_partition(nvram, start, end); + return 0; } |