@@ -400,6 +400,50 @@ static inline uint32_t pcie_config_size(PCIDevice *d)
return pci_is_pcie(d)? PCIE_CONFIG_SPACE_SIZE: PCI_CONFIG_SPACE_SIZE;
}
+static inline uint8_t *pci_write_config_init(PCIDevice *d,
+ uint32_t addr, int len)
+{
+ uint8_t *orig = qemu_malloc(pcie_config_size(d));
+ memcpy(orig + addr, d->config + addr, len);
+ return orig;
+}
+
+static inline void pci_write_config_done(uint8_t *orig)
+{
+ qemu_free(orig);
+}
+
+static inline int pci_config_changed(const uint8_t *orig, const uint8_t *new,
+ uint32_t addr, uint32_t len,
+ uint32_t base, uint32_t end)
+{
+ uint32_t low = MAX(addr, base);
+ uint32_t high = MIN(addr + len, end);
+
+ /* check if [addr, addr + len) intersects [base, end)
+ the intersection is [log, high) */
+ if (low >= high)
+ return 0;
+
+ return memcmp(orig + low, new + low, high - low);
+}
+
+static inline int pci_config_changed_with_size(const uint8_t *orig,
+ const uint8_t *new,
+ uint32_t addr, uint32_t len,
+ uint32_t base, uint32_t size)
+{
+ uint32_t low = MAX(addr, base);
+ uint32_t high = MIN(addr + len, base + size);
+
+ /* check if [addr, addr + len) intersects [base, base + size)
+ the intersection is [log, high) */
+ if (low >= high)
+ return 0;
+
+ return memcmp(orig + low, new + low, high - low);
+}
+
/* lsi53c895a.c */
#define LSI_MAX_DEVS 7
add helper functions for pci config write function to check if its configuration space is changed.. Those function will be used later. Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> --- hw/pci.h | 44 ++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 44 insertions(+), 0 deletions(-)