On 07/11/2011 04:42 AM, Anthony Liguori wrote:
On 07/10/2011 03:33 PM, malc wrote:
On Sun, 10 Jul 2011, Avi Kivity wrote:
fixes BAR sizing as well.
I find this patch disgusting, the read and write handlers in particular.
Shouldn't it be possible to do something like:
typedef struct OldMemoryRegionOps {
MemoryRegionOps parent_ops;
CPUReadMemoryFunc *readfn[3];
CPUWriteMemoryFunc *writefn[3];
void *opaque;
} OldMemoryRegionOps;
That should allow old-style implementations to be converted without
introducing trampoline functions everywhere.
Here's a new version:
diff --git a/hw/ac97.c b/hw/ac97.c
index 0b59896..b4f377d 100644
--- a/hw/ac97.c
+++ b/hw/ac97.c
@@ -160,8 +160,9 @@ typedef struct AC97LinkState {
SWVoiceIn *voice_mc;
int invalid_freq[3];
uint8_t silence[128];
- uint32_t base[2];
int bup_flag;
+ MemoryRegion io_nam;
+ MemoryRegion io_nabm;
} AC97LinkState;
enum {
@@ -583,7 +584,7 @@ static uint32_t nam_readw (void *opaque, uint32_t addr)
{
AC97LinkState *s = opaque;
uint32_t val = ~0U;
- uint32_t index = addr - s->base[0];
+ uint32_t index = addr;
s->cas = 0;
val = mixer_load (s, index);
return val;
@@ -611,7 +612,7 @@ static void nam_writeb (void *opaque, uint32_t addr,
uint32_t val)
static void nam_writew (void *opaque, uint32_t addr, uint32_t val)
{
AC97LinkState *s = opaque;
- uint32_t index = addr - s->base[0];
+ uint32_t index = addr;
s->cas = 0;
switch (index) {
case AC97_Reset:
@@ -714,7 +715,7 @@ static uint32_t nabm_readb (void *opaque, uint32_t addr)
{
AC97LinkState *s = opaque;
AC97BusMasterRegs *r = NULL;
- uint32_t index = addr - s->base[1];
+ uint32_t index = addr;
uint32_t val = ~0U;
switch (index) {
@@ -769,7 +770,7 @@ static uint32_t nabm_readw (void *opaque, uint32_t addr)
{
AC97LinkState *s = opaque;
AC97BusMasterRegs *r = NULL;
- uint32_t index = addr - s->base[1];
+ uint32_t index = addr;
uint32_t val = ~0U;
switch (index) {
@@ -798,7 +799,7 @@ static uint32_t nabm_readl (void *opaque, uint32_t addr)
{
AC97LinkState *s = opaque;
AC97BusMasterRegs *r = NULL;
- uint32_t index = addr - s->base[1];
+ uint32_t index = addr;
uint32_t val = ~0U;
switch (index) {
@@ -848,7 +849,7 @@ static void nabm_writeb (void *opaque, uint32_t
addr, uint32_t val)
{
AC97LinkState *s = opaque;
AC97BusMasterRegs *r = NULL;
- uint32_t index = addr - s->base[1];
+ uint32_t index = addr;
switch (index) {
case PI_LVI:
case PO_LVI:
@@ -904,7 +905,7 @@ static void nabm_writew (void *opaque, uint32_t
addr, uint32_t val)
{
AC97LinkState *s = opaque;
AC97BusMasterRegs *r = NULL;
- uint32_t index = addr - s->base[1];
+ uint32_t index = addr;
switch (index) {
case PI_SR:
case PO_SR:
@@ -924,7 +925,7 @@ static void nabm_writel (void *opaque, uint32_t
addr, uint32_t val)
{
AC97LinkState *s = opaque;
AC97BusMasterRegs *r = NULL;
- uint32_t index = addr - s->base[1];
+ uint32_t index = addr;
switch (index) {
case PI_BDBAR:
case PO_BDBAR:
@@ -1230,31 +1231,33 @@ static const VMStateDescription vmstate_ac97 = {
}
};
-static void ac97_map (PCIDevice *pci_dev, int region_num,
- pcibus_t addr, pcibus_t size, int type)
-{
- AC97LinkState *s = DO_UPCAST (AC97LinkState, dev, pci_dev);
- PCIDevice *d = &s->dev;
-
- if (!region_num) {
- s->base[0] = addr;
- register_ioport_read (addr, 256 * 1, 1, nam_readb, d);
- register_ioport_read (addr, 256 * 2, 2, nam_readw, d);
- register_ioport_read (addr, 256 * 4, 4, nam_readl, d);
- register_ioport_write (addr, 256 * 1, 1, nam_writeb, d);
- register_ioport_write (addr, 256 * 2, 2, nam_writew, d);
- register_ioport_write (addr, 256 * 4, 4, nam_writel, d);
- }
- else {
- s->base[1] = addr;
- register_ioport_read (addr, 64 * 1, 1, nabm_readb, d);
- register_ioport_read (addr, 64 * 2, 2, nabm_readw, d);
- register_ioport_read (addr, 64 * 4, 4, nabm_readl, d);
- register_ioport_write (addr, 64 * 1, 1, nabm_writeb, d);
- register_ioport_write (addr, 64 * 2, 2, nabm_writew, d);
- register_ioport_write (addr, 64 * 4, 4, nabm_writel, d);
- }
-}
+static const MemoryRegionPortio nam_portio[] = {
+ { 0, 256 * 1, 1, .read = nam_readb, },
+ { 0, 256 * 2, 2, .read = nam_readw, },
+ { 0, 256 * 4, 4, .read = nam_readl, },
+ { 0, 256 * 1, 1, .write = nam_writeb, },
+ { 0, 256 * 2, 2, .write = nam_writew, },
+ { 0, 256 * 4, 4, .write = nam_writel, },
+ PORTIO_END,
+};
+
+static MemoryRegionOps ac97_io_nam_ops = {
+ .old_portio = nam_portio,
+};
+
+static const MemoryRegionPortio nabm_portio[] = {
+ { 0, 64 * 1, 1, .read = nabm_readb, },
+ { 0, 64 * 2, 2, .read = nabm_readw, },
+ { 0, 64 * 4, 4, .read = nabm_readl, },
+ { 0, 64 * 1, 1, .write = nabm_writeb, },
+ { 0, 64 * 2, 2, .write = nabm_writew, },
+ { 0, 64 * 4, 4, .write = nabm_writel, },
+ PORTIO_END
+};
+
+static MemoryRegionOps ac97_io_nabm_ops = {
+ .old_portio = nabm_portio,
+};
static void ac97_on_reset (void *opaque)
{
@@ -1311,15 +1314,26 @@ static int ac97_initfn (PCIDevice *dev)
/* TODO: RST# value should be 0. */
c[PCI_INTERRUPT_PIN] = 0x01; /* intr_pn interrupt pin ro */
- pci_register_bar (&s->dev, 0, 256 * 4, PCI_BASE_ADDRESS_SPACE_IO,
- ac97_map);
- pci_register_bar (&s->dev, 1, 64 * 4, PCI_BASE_ADDRESS_SPACE_IO,
ac97_map);
+ memory_region_init_io(&s->io_nam, &ac97_io_nam_ops, s, "ac97-nam",
1024);
+ memory_region_init_io(&s->io_nabm, &ac97_io_nabm_ops, s,
"ac97-nabm", 256);
+ pci_register_bar_region(&s->dev, 0, PCI_BASE_ADDRESS_SPACE_IO,
&s->io_nam);
+ pci_register_bar_region(&s->dev, 1, PCI_BASE_ADDRESS_SPACE_IO,
&s->io_nabm);
qemu_register_reset (ac97_on_reset, s);
AUD_register_card ("ac97", &s->card);
ac97_on_reset (s);
return 0;
}
+static int ac97_exitfn(PCIDevice *dev)
+{
+ AC97LinkState *s = DO_UPCAST(AC97LinkState, dev, dev);
+
+ memory_region_destroy(&s->io_nam);
+ memory_region_destroy(&s->io_nabm);
+ return 0;
+}
+
int ac97_init (PCIBus *bus)
{
pci_create_simple (bus, -1, "AC97");
@@ -1332,6 +1346,7 @@ static PCIDeviceInfo ac97_info = {
.qdev.size = sizeof (AC97LinkState),
.qdev.vmsd = &vmstate_ac97,
.init = ac97_initfn,
+ .exit = ac97_exitfn,
.vendor_id = PCI_VENDOR_ID_INTEL,
.device_id = PCI_DEVICE_ID_INTEL_82801AA_5,
.revision = 0x01,
Callbacks are registered with an offset/size pair, since many BARs use
different callbacks for different registers within the BARs.
--
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.
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