On 2021/2/19 16:52, Ferruh Yigit wrote:
On 2/9/2021 2:51 PM, Ferruh Yigit wrote:
On 1/29/2021 3:18 AM, 谢华伟(此时此刻） wrote:
From: "huawei.xhw"
With IO BAR, we get PIO(programmed IO) address.
With MMIO BAR, we get mapped virtual address.
We distinguish PIO(Programmed IO) and MMIO(memory mapped I
On 2/9/2021 2:51 PM, Ferruh Yigit wrote:
On 1/29/2021 3:18 AM, 谢华伟(此时此刻） wrote:
From: "huawei.xhw"
With IO BAR, we get PIO(programmed IO) address.
With MMIO BAR, we get mapped virtual address.
We distinguish PIO(Programmed IO) and MMIO(memory mapped IO) by their address
like how kernel does.
On Wed, Feb 17, 2021 at 3:15 PM 谢华伟(此时此刻） wrote:
>
>
> On 2021/2/17 17:06, David Marchand wrote:
> > On Fri, Jan 29, 2021 at 4:19 AM 谢华伟(此时此刻）
> > wrote:
> >> @@ -517,6 +525,60 @@
> >> }
> >> #endif
> >>
> >> +static inline uint8_t ioread8(void *addr)
> >> +{
> >> + uint8_t val;
> >> +
On 2021/2/17 17:06, David Marchand wrote:
On Fri, Jan 29, 2021 at 4:19 AM 谢华伟(此时此刻） wrote:
@@ -517,6 +525,60 @@
}
#endif
+static inline uint8_t ioread8(void *addr)
+{
+ uint8_t val;
+
+ val = (uint64_t)(uintptr_t)addr >= PIO_MAX ?
+ *(volatile uint8_t *)addr :
+
On Fri, Jan 29, 2021 at 4:19 AM 谢华伟(此时此刻） wrote:
> @@ -517,6 +525,60 @@
> }
> #endif
>
> +static inline uint8_t ioread8(void *addr)
> +{
> + uint8_t val;
> +
> + val = (uint64_t)(uintptr_t)addr >= PIO_MAX ?
> + *(volatile uint8_t *)addr :
> + inb((unsigned
On 1/29/2021 3:18 AM, 谢华伟(此时此刻） wrote:
From: "huawei.xhw"
With IO BAR, we get PIO(programmed IO) address.
With MMIO BAR, we get mapped virtual address.
We distinguish PIO(Programmed IO) and MMIO(memory mapped IO) by their address
like how kernel does.
ioread/write8/16/32 is provided to access
On 1/29/21 4:18 AM, 谢华伟(此时此刻） wrote:
> |From: "huawei.xhw" With IO BAR, we get
> PIO(programmed IO) address. With MMIO BAR, we get mapped virtual
> address. We distinguish PIO(Programmed IO) and MMIO(memory mapped IO) by
> their address like how kernel does. ioread/write8/16/32 is provided to
>
From: "huawei.xhw"
With IO BAR, we get PIO(programmed IO) address.
With MMIO BAR, we get mapped virtual address.
We distinguish PIO(Programmed IO) and MMIO(memory mapped IO) by their address
like how kernel does.
ioread/write8/16/32 is provided to access PIO/MMIO.
By the way, for virtio on arch
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