diff options
| -rw-r--r-- | hw/block/pflash_cfi01.c | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/hw/block/pflash_cfi01.c b/hw/block/pflash_cfi01.c index d67f84d655..3cd483d26a 100644 --- a/hw/block/pflash_cfi01.c +++ b/hw/block/pflash_cfi01.c @@ -278,9 +278,13 @@ static uint32_t pflash_read(PFlashCFI01 *pfl, hwaddr offset, /* This should never happen : reset state & treat it as a read */ DPRINTF("%s: unknown command state: %x\n", __func__, pfl->cmd); pfl->wcycle = 0; - pfl->cmd = 0; + /* + * The command 0x00 is not assigned by the CFI open standard, + * but QEMU historically uses it for the READ_ARRAY command (0xff). + */ + pfl->cmd = 0x00; /* fall through to read code */ - case 0x00: + case 0x00: /* This model reset value for READ_ARRAY (not CFI compliant) */ /* Flash area read */ ret = pflash_data_read(pfl, offset, width, be); break; @@ -449,7 +453,7 @@ static void pflash_write(PFlashCFI01 *pfl, hwaddr offset, case 0: /* read mode */ switch (cmd) { - case 0x00: /* ??? */ + case 0x00: /* This model reset value for READ_ARRAY (not CFI) */ goto reset_flash; case 0x10: /* Single Byte Program */ case 0x40: /* Single Byte Program */ @@ -646,7 +650,7 @@ static void pflash_write(PFlashCFI01 *pfl, hwaddr offset, trace_pflash_reset(); memory_region_rom_device_set_romd(&pfl->mem, true); pfl->wcycle = 0; - pfl->cmd = 0; + pfl->cmd = 0x00; /* This model reset value for READ_ARRAY (not CFI) */ } @@ -762,7 +766,11 @@ static void pflash_cfi01_realize(DeviceState *dev, Error **errp) } pfl->wcycle = 0; - pfl->cmd = 0; + /* + * The command 0x00 is not assigned by the CFI open standard, + * but QEMU historically uses it for the READ_ARRAY command (0xff). + */ + pfl->cmd = 0x00; pfl->status = 0x80; /* WSM ready */ /* Hardcoded CFI table */ /* Standard "QRY" string */ |