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IDE: add tracing for data ports

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To be used sparingly, but still interesting in the case of small
firmwares designed to reproduce bugs in QEMU IDE.

Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: 20170901001502.29915-4-jsnow@redhat.com
Signed-off-by: John Snow <jsnow@redhat.com>
This commit is contained in:
John Snow 2017-09-18 15:01:26 -04:00
parent 335ca2f2f0
commit 1787efc3d2
2 changed files with 16 additions and 1 deletions
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12
hw/ide/core.c
View file

@ -2259,6 +2259,8 @@ void ide_data_writew(void *opaque, uint32_t addr, uint32_t val)
IDEState *s = idebus_active_if(bus);
uint8_t *p;
trace_ide_data_writew(addr, val, bus, s);
/* PIO data access allowed only when DRQ bit is set. The result of a write
* during PIO out is indeterminate, just ignore it. */
if (!(s->status & DRQ_STAT) || ide_is_pio_out(s)) {
@ -2304,6 +2306,8 @@ uint32_t ide_data_readw(void *opaque, uint32_t addr)
s->status &= ~DRQ_STAT;
s->end_transfer_func(s);
}
trace_ide_data_readw(addr, ret, bus, s);
return ret;
}
@ -2313,6 +2317,8 @@ void ide_data_writel(void *opaque, uint32_t addr, uint32_t val)
IDEState *s = idebus_active_if(bus);
uint8_t *p;
trace_ide_data_writel(addr, val, bus, s);
/* PIO data access allowed only when DRQ bit is set. The result of a write
* during PIO out is indeterminate, just ignore it. */
if (!(s->status & DRQ_STAT) || ide_is_pio_out(s)) {
@ -2343,7 +2349,8 @@ uint32_t ide_data_readl(void *opaque, uint32_t addr)
/* PIO data access allowed only when DRQ bit is set. The result of a read
* during PIO in is indeterminate, return 0 and don't move forward. */
if (!(s->status & DRQ_STAT) || !ide_is_pio_out(s)) {
return 0;
ret = 0;
goto out;
}
p = s->data_ptr;
@ -2358,6 +2365,9 @@ uint32_t ide_data_readl(void *opaque, uint32_t addr)
s->status &= ~DRQ_STAT;
s->end_transfer_func(s);
}
out:
trace_ide_data_readl(addr, ret, bus, s);
return ret;
}