提交 4bf6637d 编写于 作者: J John Snow 提交者: Stefan Hajnoczi

IDE: Fill the IDENTIFY request consistently

IDE-HD, IDE-ATAPI and IDE-CFATA all fill the
identify buffer in slightly different ways,
this is a relatively minor patch to make them
uniform, to emphasize that:

(1) We build the s->identify_data cache first, then
(2) We copy it to s->io_buffer to fulfill the request.
Signed-off-by: NJohn Snow <jsnow@redhat.com>
Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>
上级 b6b1d31f
......@@ -81,13 +81,12 @@ static void ide_identify(IDEState *s)
unsigned int oldsize;
IDEDevice *dev = s->unit ? s->bus->slave : s->bus->master;
p = (uint16_t *)s->identify_data;
if (s->identify_set) {
memcpy(s->io_buffer, s->identify_data, sizeof(s->identify_data));
return;
goto fill_buffer;
}
memset(p, 0, sizeof(s->identify_data));
memset(s->io_buffer, 0, 512);
p = (uint16_t *)s->io_buffer;
put_le16(p + 0, 0x0040);
put_le16(p + 1, s->cylinders);
put_le16(p + 3, s->heads);
......@@ -180,21 +179,22 @@ static void ide_identify(IDEState *s)
put_le16(p + 169, 1); /* TRIM support */
}
memcpy(s->identify_data, p, sizeof(s->identify_data));
s->identify_set = 1;
fill_buffer:
memcpy(s->io_buffer, p, sizeof(s->identify_data));
}
static void ide_atapi_identify(IDEState *s)
{
uint16_t *p;
p = (uint16_t *)s->identify_data;
if (s->identify_set) {
memcpy(s->io_buffer, s->identify_data, sizeof(s->identify_data));
return;
goto fill_buffer;
}
memset(p, 0, sizeof(s->identify_data));
memset(s->io_buffer, 0, 512);
p = (uint16_t *)s->io_buffer;
/* Removable CDROM, 50us response, 12 byte packets */
put_le16(p + 0, (2 << 14) | (5 << 8) | (1 << 7) | (2 << 5) | (0 << 0));
padstr((char *)(p + 10), s->drive_serial_str, 20); /* serial number */
......@@ -247,8 +247,10 @@ static void ide_atapi_identify(IDEState *s)
put_le16(p + 111, s->wwn);
}
memcpy(s->identify_data, p, sizeof(s->identify_data));
s->identify_set = 1;
fill_buffer:
memcpy(s->io_buffer, p, sizeof(s->identify_data));
}
static void ide_cfata_identify(IDEState *s)
......@@ -256,10 +258,10 @@ static void ide_cfata_identify(IDEState *s)
uint16_t *p;
uint32_t cur_sec;
p = (uint16_t *) s->identify_data;
if (s->identify_set)
p = (uint16_t *)s->identify_data;
if (s->identify_set) {
goto fill_buffer;
}
memset(p, 0, sizeof(s->identify_data));
cur_sec = s->cylinders * s->heads * s->sectors;
......
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