diff options
Diffstat (limited to 'hw/ide')
| -rw-r--r-- | hw/ide/core.c | 43 |
1 files changed, 33 insertions, 10 deletions
diff --git a/hw/ide/core.c b/hw/ide/core.c index 39afdc0006..5d1039378f 100644 --- a/hw/ide/core.c +++ b/hw/ide/core.c @@ -1648,6 +1648,13 @@ static bool cmd_set_features(IDEState *s, uint8_t cmd) /* XXX: valid for CDROM ? */ switch (s->feature) { + case 0x01: /* 8-bit I/O enable (CompactFlash) */ + case 0x81: /* 8-bit I/O disable (CompactFlash) */ + if (s->drive_kind != IDE_CFATA) { + goto abort_cmd; + } + s->io8 = !(s->feature & 0x80); + return true; case 0x02: /* write cache enable */ blk_set_enable_write_cache(s->blk, true); identify_data = (uint16_t *)s->identify_data; @@ -2374,12 +2381,20 @@ void ide_data_writew(void *opaque, uint32_t addr, uint32_t val) } p = s->data_ptr; - if (p + 2 > s->data_end) { - return; - } + if (s->io8) { + if (p + 1 > s->data_end) { + return; + } + + *p++ = val; + } else { + if (p + 2 > s->data_end) { + return; + } - *(uint16_t *)p = le16_to_cpu(val); - p += 2; + *(uint16_t *)p = le16_to_cpu(val); + p += 2; + } s->data_ptr = p; if (p >= s->data_end) { s->status &= ~DRQ_STAT; @@ -2401,12 +2416,20 @@ uint32_t ide_data_readw(void *opaque, uint32_t addr) } p = s->data_ptr; - if (p + 2 > s->data_end) { - return 0; - } + if (s->io8) { + if (p + 1 > s->data_end) { + return 0; + } - ret = cpu_to_le16(*(uint16_t *)p); - p += 2; + ret = *p++; + } else { + if (p + 2 > s->data_end) { + return 0; + } + + ret = cpu_to_le16(*(uint16_t *)p); + p += 2; + } s->data_ptr = p; if (p >= s->data_end) { s->status &= ~DRQ_STAT; |