diff options
Diffstat (limited to 'hw')
| -rw-r--r-- | hw/ppc/amigaone.c | 37 |
1 files changed, 36 insertions, 1 deletions
diff --git a/hw/ppc/amigaone.c b/hw/ppc/amigaone.c index feb2cf452c..1c6f2a944d 100644 --- a/hw/ppc/amigaone.c +++ b/hw/ppc/amigaone.c @@ -52,6 +52,28 @@ static const char dummy_fw[] = { #define NVRAM_ADDR 0xfd0e0000 #define NVRAM_SIZE (4 * KiB) +static char default_env[] = + "baudrate=115200\0" + "stdout=vga\0" + "stdin=ps2kbd\0" + "bootcmd=boota; menu; run menuboot_cmd\0" + "boot1=ide\0" + "boot2=cdrom\0" + "boota_timeout=3\0" + "ide_doreset=on\0" + "pci_irqa=9\0" + "pci_irqa_select=level\0" + "pci_irqb=10\0" + "pci_irqb_select=level\0" + "pci_irqc=11\0" + "pci_irqc_select=level\0" + "pci_irqd=7\0" + "pci_irqd_select=level\0" + "a1ide_irq=1111\0" + "a1ide_xfer=FFFF\0"; +#define CRC32_DEFAULT_ENV 0xb5548481 +#define CRC32_ALL_ZEROS 0x603b0489 + #define TYPE_A1_NVRAM "a1-nvram" OBJECT_DECLARE_SIMPLE_TYPE(A1NVRAMState, A1_NVRAM) @@ -94,7 +116,7 @@ static void nvram_realize(DeviceState *dev, Error **errp) { A1NVRAMState *s = A1_NVRAM(dev); void *p; - uint32_t *c; + uint32_t crc, *c; memory_region_init_rom_device(&s->mr, NULL, &nvram_ops, s, "nvram", NVRAM_SIZE, &error_fatal); @@ -113,12 +135,25 @@ static void nvram_realize(DeviceState *dev, Error **errp) return; } } + crc = crc32(0, p + 4, NVRAM_SIZE - 4); + if (crc == CRC32_ALL_ZEROS) { /* If env is uninitialized set default */ + *c = cpu_to_be32(CRC32_DEFAULT_ENV); + /* Also copies terminating \0 as env is terminated by \0\0 */ + memcpy(p + 4, default_env, sizeof(default_env)); + if (s->blk) { + blk_pwrite(s->blk, 0, sizeof(crc) + sizeof(default_env), p, 0); + } + return; + } if (*c == 0) { *c = cpu_to_be32(crc32(0, p + 4, NVRAM_SIZE - 4)); if (s->blk) { blk_pwrite(s->blk, 0, 4, p, 0); } } + if (be32_to_cpu(*c) != crc) { + warn_report("NVRAM checksum mismatch"); + } } static const Property nvram_properties[] = { |