On Mon, Oct 18, 2010 at 12:17:45PM +0900, Isaku Yamahata wrote:
> record which is written into pci configuration space.
> introduce helper function to zero PCIDevice::written.
> They will be used later.
>
> Signed-off-by: Isaku Yamahata <yamah...@valinux.co.jp>
This really exposes an internal variable.
I really dislike this, and I don't think it's needed
at all: just make the bit writeable.
Commented on appropriate patches.
> ---
> hw/pci.c | 10 ++++++++++
> hw/pci.h | 5 +++++
> 2 files changed, 15 insertions(+), 0 deletions(-)
>
> diff --git a/hw/pci.c b/hw/pci.c
> index 5954476..eca9324 100644
> --- a/hw/pci.c
> +++ b/hw/pci.c
> @@ -627,6 +627,7 @@ static void pci_config_alloc(PCIDevice *pci_dev)
> pci_dev->cmask = qemu_mallocz(config_size);
> pci_dev->wmask = qemu_mallocz(config_size);
> pci_dev->w1cmask = qemu_mallocz(config_size);
> + pci_dev->written = qemu_mallocz(config_size);
> pci_dev->used = qemu_mallocz(config_size);
> }
>
> @@ -636,6 +637,7 @@ static void pci_config_free(PCIDevice *pci_dev)
> qemu_free(pci_dev->cmask);
> qemu_free(pci_dev->wmask);
> qemu_free(pci_dev->w1cmask);
> + qemu_free(pci_dev->written);
> qemu_free(pci_dev->used);
> }
>
> @@ -1002,6 +1004,8 @@ void pci_default_write_config(PCIDevice *d, uint32_t
> addr, uint32_t val, int l)
> assert(!(wmask & w1cmask));
> d->config[addr + i] = (d->config[addr + i] & ~wmask) | (val & wmask);
> d->config[addr + i] &= ~(val & w1cmask); /* W1C: Write 1 to Clear */
> + d->written[addr + i] = val; /* record what is written for driver
> + specific code */
> }
> if (ranges_overlap(addr, l, PCI_BASE_ADDRESS_0, 24) ||
> ranges_overlap(addr, l, PCI_ROM_ADDRESS, 4) ||
> @@ -1013,6 +1017,12 @@ void pci_default_write_config(PCIDevice *d, uint32_t
> addr, uint32_t val, int l)
> pci_update_irq_disabled(d, was_irq_disabled);
> }
>
> +void pci_clear_written_write_config(PCIDevice *d,
> + uint32_t addr, uint32_t val, int l)
> +{
> + memset(d->written + addr, 0, l);
> +}
> +
> /***********************************************************/
> /* generic PCI irq support */
>
> diff --git a/hw/pci.h b/hw/pci.h
> index eafa9f3..7097817 100644
> --- a/hw/pci.h
> +++ b/hw/pci.h
> @@ -132,6 +132,9 @@ struct PCIDevice {
> /* Used to implement RW1C(Write 1 to Clear) bytes */
> uint8_t *w1cmask;
>
> + /* Used to record what value is written */
> + uint8_t *written;
> +
> /* Used to allocate config space for capabilities. */
> uint8_t *used;
>
> @@ -200,6 +203,8 @@ uint32_t pci_default_read_config(PCIDevice *d,
> uint32_t address, int len);
> void pci_default_write_config(PCIDevice *d,
> uint32_t address, uint32_t val, int len);
> +void pci_clear_written_write_config(PCIDevice *d,
> + uint32_t addr, uint32_t val, int l);
> void pci_device_save(PCIDevice *s, QEMUFile *f);
> int pci_device_load(PCIDevice *s, QEMUFile *f);
>
> --
> 1.7.1.1
