[Qemu-devel,04/11] qemu: helper routines for pci access.

Commit Message

Michael S. Tsirkin May 26, 2009, 8:49 a.m. UTC

On Tue, May 26, 2009 at 11:07:33AM +0300, Avi Kivity wrote:
> Michael S. Tsirkin wrote:
>> On Tue, May 26, 2009 at 11:33:37AM +0900, Isaku Yamahata wrote:
>>   
>>> On Mon, May 25, 2009 at 03:25:33PM +0300, Michael S. Tsirkin wrote:
>>>     
>>>> Add inline routines for convenient access to pci devices
>>>> with correct (little) endianness. Will be used by MSI-X support.
>>>>       
>>> Just a minor comment.
>>> How about to add pci_[sg]et_byte() for consistency?
>>>     
>>
>> I don't see that it makes sense - pci_set_long(config, value)
>> is shorter than *((uint32_t *)config) = cpu_to_le32(value),
>> but single bytes don't have endianness, and *config = value
>> is shorter.
>>   
>
> It's nice to have consistent APIs though.

Well, if enough people feel so ...



qemu: add pci_get/set_byte

Add pci_get/set_byte to keep *_word and *_long access functions company.
They are unused for now.

Signed-off-by: Michael S. Tsirkin <[e-mail]>

---

Patch

diff --git a/hw/pci.h b/hw/pci.h
index 4072f16..e1e4fb4 100644
--- a/hw/pci.h
+++ b/hw/pci.h
@@ -263,6 +263,18 @@  PCIBus *pci_bridge_init(PCIBus *bus, int devfn, uint16_t vid, uint16_t did,
                         pci_map_irq_fn map_irq, const char *name);
 
 static inline void
+pci_set_byte(uint8_t *config, uint8_t val)
+{
+    *config = val;
+}
+
+static inline uint8_t
+pci_get_byte(uint8_t *config)
+{
+    return *config;
+}
+
+static inline void
 pci_set_word(uint8_t *config, uint16_t val)
 {
     cpu_to_le16wu((uint16_t *)config, val);