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[Xen-devel] [PATCH 27/32] hw/pci-host/piix: Define and use the PIIX IRQ Route Control Registers



The IRQ Route Control registers definitions belong to the PIIX
chipset. We were only defining the 'A' register. Define the other
B, C and D registers, and use them.

Signed-off-by: Philippe Mathieu-Daudé <philmd@xxxxxxxxxx>
---
 hw/i386/xen/xen-hvm.c         | 5 +++--
 hw/mips/gt64xxx_pci.c         | 4 ++--
 hw/pci-host/piix.c            | 9 ++++-----
 include/hw/southbridge/piix.h | 6 ++++++
 4 files changed, 15 insertions(+), 9 deletions(-)

diff --git a/hw/i386/xen/xen-hvm.c b/hw/i386/xen/xen-hvm.c
index 6b5e5bb7f5..4ce2fb9c89 100644
--- a/hw/i386/xen/xen-hvm.c
+++ b/hw/i386/xen/xen-hvm.c
@@ -14,6 +14,7 @@
 #include "hw/pci/pci.h"
 #include "hw/pci/pci_host.h"
 #include "hw/i386/pc.h"
+#include "hw/southbridge/piix.h"
 #include "hw/irq.h"
 #include "hw/hw.h"
 #include "hw/i386/apic-msidef.h"
@@ -156,8 +157,8 @@ void xen_piix_pci_write_config_client(uint32_t address, 
uint32_t val, int len)
             v = 0;
         }
         v &= 0xf;
-        if (((address + i) >= 0x60) && ((address + i) <= 0x63)) {
-            xen_set_pci_link_route(xen_domid, address + i - 0x60, v);
+        if (((address + i) >= PIIX_PIRQCA) && ((address + i) <= PIIX_PIRQCD)) {
+            xen_set_pci_link_route(xen_domid, address + i - PIIX_PIRQCA, v);
         }
     }
 }
diff --git a/hw/mips/gt64xxx_pci.c b/hw/mips/gt64xxx_pci.c
index c277398c0d..5cab9c1ee1 100644
--- a/hw/mips/gt64xxx_pci.c
+++ b/hw/mips/gt64xxx_pci.c
@@ -1013,12 +1013,12 @@ static void gt64120_pci_set_irq(void *opaque, int 
irq_num, int level)
 
     /* now we change the pic irq level according to the piix irq mappings */
     /* XXX: optimize */
-    pic_irq = piix4_dev->config[0x60 + irq_num];
+    pic_irq = piix4_dev->config[PIIX_PIRQCA + irq_num];
     if (pic_irq < 16) {
         /* The pic level is the logical OR of all the PCI irqs mapped to it. */
         pic_level = 0;
         for (i = 0; i < 4; i++) {
-            if (pic_irq == piix4_dev->config[0x60 + i]) {
+            if (pic_irq == piix4_dev->config[PIIX_PIRQCA + i]) {
                 pic_level |= pci_irq_levels[i];
             }
         }
diff --git a/hw/pci-host/piix.c b/hw/pci-host/piix.c
index 3770575c1a..a450fc726e 100644
--- a/hw/pci-host/piix.c
+++ b/hw/pci-host/piix.c
@@ -61,7 +61,6 @@ typedef struct I440FXState {
 #define PIIX_NUM_PIC_IRQS       16      /* i8259 * 2 */
 #define PIIX_NUM_PIRQS          4ULL    /* PIRQ[A-D] */
 #define XEN_PIIX_NUM_PIRQS      128ULL
-#define PIIX_PIRQC              0x60
 
 typedef struct PIIX3State {
     PCIDevice dev;
@@ -468,7 +467,7 @@ static void piix3_set_irq_level_internal(PIIX3State *piix3, 
int pirq, int level)
     int pic_irq;
     uint64_t mask;
 
-    pic_irq = piix3->dev.config[PIIX_PIRQC + pirq];
+    pic_irq = piix3->dev.config[PIIX_PIRQCA + pirq];
     if (pic_irq >= PIIX_NUM_PIC_IRQS) {
         return;
     }
@@ -482,7 +481,7 @@ static void piix3_set_irq_level(PIIX3State *piix3, int 
pirq, int level)
 {
     int pic_irq;
 
-    pic_irq = piix3->dev.config[PIIX_PIRQC + pirq];
+    pic_irq = piix3->dev.config[PIIX_PIRQCA + pirq];
     if (pic_irq >= PIIX_NUM_PIC_IRQS) {
         return;
     }
@@ -501,7 +500,7 @@ static void piix3_set_irq(void *opaque, int pirq, int level)
 static PCIINTxRoute piix3_route_intx_pin_to_irq(void *opaque, int pin)
 {
     PIIX3State *piix3 = opaque;
-    int irq = piix3->dev.config[PIIX_PIRQC + pin];
+    int irq = piix3->dev.config[PIIX_PIRQCA + pin];
     PCIINTxRoute route;
 
     if (irq < PIIX_NUM_PIC_IRQS) {
@@ -530,7 +529,7 @@ static void piix3_write_config(PCIDevice *dev,
                                uint32_t address, uint32_t val, int len)
 {
     pci_default_write_config(dev, address, val, len);
-    if (ranges_overlap(address, len, PIIX_PIRQC, 4)) {
+    if (ranges_overlap(address, len, PIIX_PIRQCA, 4)) {
         PIIX3State *piix3 = PIIX3_PCI_DEVICE(dev);
         int pic_irq;
 
diff --git a/include/hw/southbridge/piix.h b/include/hw/southbridge/piix.h
index 79ebe0089b..9c92c37a4d 100644
--- a/include/hw/southbridge/piix.h
+++ b/include/hw/southbridge/piix.h
@@ -18,6 +18,12 @@ I2CBus *piix4_pm_init(PCIBus *bus, int devfn, uint32_t 
smb_io_base,
                       qemu_irq sci_irq, qemu_irq smi_irq,
                       int smm_enabled, DeviceState **piix4_pm);
 
+/* PIRQRC[A:D]: PIRQx Route Control Registers */
+#define PIIX_PIRQCA 0x60
+#define PIIX_PIRQCB 0x61
+#define PIIX_PIRQCC 0x62
+#define PIIX_PIRQCD 0x63
+
 /*
  * Reset Control Register: PCI-accessible ISA-Compatible Register at address
  * 0xcf9, provided by the PCI/ISA bridge (PIIX3 PCI function 0, 8086:7000).
-- 
2.21.0


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