Add macros to read/write registers of virtio-1.0 regions.
Signed-off-by: Gerd Hoffmann <kraxel at redhat.com>
---
src/hw/virtio-pci.h | 76 +++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 76 insertions(+)
diff --git a/src/hw/virtio-pci.h b/src/hw/virtio-pci.h
index 893a7dd..e1d8b3e 100644
--- a/src/hw/virtio-pci.h
+++ b/src/hw/virtio-pci.h
@@ -111,6 +111,82 @@ struct vp_device {
struct vp_cap common, notify, isr, device;
};
+#define vp_modern_read(_cap, _struct, _field, _var) { \
+ u32 addr = _cap.addr; \
+ addr += offsetof(_struct, _field); \
+ if (_cap.is_io) { \
+ switch (sizeof(((_struct *)0)->_field)) { \
+ case 8: \
+ _var = inl(addr); \
+ _var |= (u64)inl(addr+4) << 32; \
+ break; \
+ case 4: \
+ _var = inl(addr); \
+ break; \
+ case 2: \
+ _var = inw(addr); \
+ break; \
+ case 1: \
+ _var = inb(addr); \
+ break; \
+ default: \
+ _var = 0; \
+ } \
+ } else { \
+ switch (sizeof(((_struct *)0)->_field)) { \
+ case 8: \
+ _var = readl((void*)addr); \
+ _var |= (u64)readl((void*)(addr+4)) << 32; \
+ break; \
+ case 4: \
+ _var = readl((void*)addr); \
+ break; \
+ case 2: \
+ _var = readw((void*)addr); \
+ break; \
+ case 1: \
+ _var = readb((void*)addr); \
+ break; \
+ default: \
+ _var = 0; \
+ } \
+ } \
+ dprintf(9, "vp read %x (%d) -> 0x%x\n", \
+ addr, sizeof(((_struct *)0)->_field), (u32)_var); \
+ }
+
+#define vp_modern_write(_cap, _struct, _field, _var) { \
+ u32 addr = _cap.addr; \
+ addr += offsetof(_struct, _field); \
+ dprintf(9, "vp write %x (%d) <- 0x%x\n", \
+ addr, sizeof(((_struct *)0)->_field), (u32)_var); \
+ if (_cap.is_io) { \
+ switch (sizeof(((_struct *)0)->_field)) { \
+ case 4: \
+ outl(_var, addr); \
+ break; \
+ case 2: \
+ outw(_var, addr); \
+ break; \
+ case 1: \
+ outb(_var, addr); \
+ break; \
+ } \
+ } else { \
+ switch (sizeof(((_struct *)0)->_field)) { \
+ case 4: \
+ writel((void*)addr, _var); \
+ break; \
+ case 2: \
+ writew((void*)addr, _var); \
+ break; \
+ case 1: \
+ writeb((void*)addr, _var); \
+ break; \
+ } \
+ } \
+ }
+
static inline u32 vp_get_features(struct vp_device *vp)
{
return inl(GET_LOWFLAT(vp->ioaddr) + VIRTIO_PCI_HOST_FEATURES);
--
1.8.3.1