case 0x0b:
case 0x0e:
case 0x10 ... 0x27: /* base */
+ case 0x2c ... 0x2f: /* read-only subsystem ID & vendor ID */
case 0x30 ... 0x33: /* rom */
case 0x3d:
can_write = 0;
case 0x0a:
case 0x0b:
case 0x0e:
+ case 0x2c ... 0x2f: /* read-only subsystem ID & vendor ID */
case 0x38 ... 0x3b: /* rom */
case 0x3d:
can_write = 0;
break;
}
if (can_write) {
+ /* Mask out writes to reserved bits in registers */
+ switch (addr) {
+ case 0x06:
+ val &= ~PCI_STATUS_RESERVED_MASK_LO;
+ break;
+ case 0x07:
+ val &= ~PCI_STATUS_RESERVED_MASK_HI;
+ break;
+ }
d->config[addr] = val;
}
if (++addr > 0xff)
#define PCI_MIN_GNT 0x3e /* 8 bits */
#define PCI_MAX_LAT 0x3f /* 8 bits */
+/* Bits in the PCI Status Register (PCI 2.3 spec) */
+#define PCI_STATUS_RESERVED1 0x007
+#define PCI_STATUS_INT_STATUS 0x008
+#define PCI_STATUS_CAPABILITIES 0x010
+#define PCI_STATUS_66MHZ 0x020
+#define PCI_STATUS_RESERVED2 0x040
+#define PCI_STATUS_FAST_BACK 0x080
+#define PCI_STATUS_DEVSEL 0x600
+
+#define PCI_STATUS_RESERVED_MASK_LO (PCI_STATUS_RESERVED1 | \
+ PCI_STATUS_INT_STATUS | PCI_STATUS_CAPABILITIES | \
+ PCI_STATUS_66MHZ | PCI_STATUS_RESERVED2 | PCI_STATUS_FAST_BACK)
+
+#define PCI_STATUS_RESERVED_MASK_HI (PCI_STATUS_DEVSEL >> 8)
+
struct PCIDevice {
/* PCI config space */
uint8_t config[256];