[Qemu-devel] [PATCH 15/18] arm: gic: Remove references to NVIC

[Michael Davidsaver <mdavidsaver@gmail.com>]

armv7m_nvic.c no longer relies on the GIC.
Remove REV_NVIC and conditionals which use it.

Signed-off-by: Michael Davidsaver <mdavidsaver@gmail.com>
---
 hw/intc/arm_gic.c        | 14 +++++++-------
 hw/intc/arm_gic_common.c | 23 ++++++++---------------
 hw/intc/gic_internal.h   |  7 ++-----
 3 files changed, 17 insertions(+), 27 deletions(-)

diff --git a/hw/intc/arm_gic.c b/hw/intc/arm_gic.c
index 8bad132..d543a93 100644
--- a/hw/intc/arm_gic.c
+++ b/hw/intc/arm_gic.c
@@ -184,7 +184,7 @@ static void gic_set_irq(void *opaque, int irq, int level)
         return;
     }
 
-    if (s->revision == REV_11MPCORE || s->revision == REV_NVIC) {
+    if (s->revision == REV_11MPCORE) {
         gic_set_irq_11mpcore(s, irq, level, cm, target);
     } else {
         gic_set_irq_generic(s, irq, level, cm, target);
@@ -335,7 +335,7 @@ uint32_t gic_acknowledge_irq(GICState *s, int cpu, MemTxAttrs attrs)
         return 1023;
     }
 
-    if (s->revision == REV_11MPCORE || s->revision == REV_NVIC) {
+    if (s->revision == REV_11MPCORE) {
         /* Clear pending flags for both level and edge triggered interrupts.
          * Level triggered IRQs will be reasserted once they become inactive.
          */
@@ -514,7 +514,7 @@ void gic_complete_irq(GICState *s, int cpu, int irq, MemTxAttrs attrs)
         return; /* No active IRQ.  */
     }
 
-    if (s->revision == REV_11MPCORE || s->revision == REV_NVIC) {
+    if (s->revision == REV_11MPCORE) {
         /* Mark level triggered interrupts as pending if they are still
            raised.  */
         if (!GIC_TEST_EDGE_TRIGGER(irq) && GIC_TEST_ENABLED(irq, cm)
@@ -672,7 +672,7 @@ static uint32_t gic_dist_readb(void *opaque, hwaddr offset, MemTxAttrs attrs)
     } else if (offset < 0xf10) {
         goto bad_reg;
     } else if (offset < 0xf30) {
-        if (s->revision == REV_11MPCORE || s->revision == REV_NVIC) {
+        if (s->revision == REV_11MPCORE) {
             goto bad_reg;
         }
 
@@ -883,7 +883,7 @@ static void gic_dist_writeb(void *opaque, hwaddr offset,
         if (irq < GIC_NR_SGIS)
             value |= 0xaa;
         for (i = 0; i < 4; i++) {
-            if (s->revision == REV_11MPCORE || s->revision == REV_NVIC) {
+            if (s->revision == REV_11MPCORE) {
                 if (value & (1 << (i * 2))) {
                     GIC_SET_MODEL(irq + i);
                 } else {
@@ -901,7 +901,7 @@ static void gic_dist_writeb(void *opaque, hwaddr offset,
         goto bad_reg;
     } else if (offset < 0xf20) {
         /* GICD_CPENDSGIRn */
-        if (s->revision == REV_11MPCORE || s->revision == REV_NVIC) {
+        if (s->revision == REV_11MPCORE) {
             goto bad_reg;
         }
         irq = (offset - 0xf10);
@@ -912,7 +912,7 @@ static void gic_dist_writeb(void *opaque, hwaddr offset,
         }
     } else if (offset < 0xf30) {
         /* GICD_SPENDSGIRn */
-        if (s->revision == REV_11MPCORE || s->revision == REV_NVIC) {
+        if (s->revision == REV_11MPCORE) {
             goto bad_reg;
         }
         irq = (offset - 0xf20);
diff --git a/hw/intc/arm_gic_common.c b/hw/intc/arm_gic_common.c
index 9c82b97..4987047 100644
--- a/hw/intc/arm_gic_common.c
+++ b/hw/intc/arm_gic_common.c
@@ -97,9 +97,7 @@ void gic_init_irqs_and_mmio(GICState *s, qemu_irq_handler handler,
      *  [N+32..N+63] PPIs for CPU 1
      *   ...
      */
-    if (s->revision != REV_NVIC) {
-        i += (GIC_INTERNAL * s->num_cpu);
-    }
+    i += (GIC_INTERNAL * s->num_cpu);
     qdev_init_gpio_in(DEVICE(s), handler, i);
 
     for (i = 0; i < s->num_cpu; i++) {
@@ -113,16 +111,12 @@ void gic_init_irqs_and_mmio(GICState *s, qemu_irq_handler handler,
     memory_region_init_io(&s->iomem, OBJECT(s), ops, s, "gic_dist", 0x1000);
     sysbus_init_mmio(sbd, &s->iomem);
 
-    if (s->revision != REV_NVIC) {
-        /* This is the main CPU interface "for this core". It is always
-         * present because it is required by both software emulation and KVM.
-         * NVIC is not handled here because its CPU interface is different,
-         * neither it can use KVM.
-         */
-        memory_region_init_io(&s->cpuiomem[0], OBJECT(s), ops ? &ops[1] : NULL,
-                              s, "gic_cpu", s->revision == 2 ? 0x1000 : 0x100);
-        sysbus_init_mmio(sbd, &s->cpuiomem[0]);
-    }
+    /* This is the main CPU interface "for this core". It is always
+     * present because it is required by both software emulation and KVM.
+     */
+    memory_region_init_io(&s->cpuiomem[0], OBJECT(s), ops ? &ops[1] : NULL,
+                          s, "gic_cpu", s->revision == 2 ? 0x1000 : 0x100);
+    sysbus_init_mmio(sbd, &s->cpuiomem[0]);
 }
 
 static void arm_gic_common_realize(DeviceState *dev, Error **errp)
@@ -154,7 +148,7 @@ static void arm_gic_common_realize(DeviceState *dev, Error **errp)
     }
 
     if (s->security_extn &&
-        (s->revision == REV_11MPCORE || s->revision == REV_NVIC)) {
+        (s->revision == REV_11MPCORE)) {
         error_setg(errp, "this GIC revision does not implement "
                    "the security extensions");
         return;
@@ -247,7 +241,6 @@ static Property arm_gic_common_properties[] = {
     DEFINE_PROP_UINT32("num-irq", GICState, num_irq, 32),
     /* Revision can be 1 or 2 for GIC architecture specification
      * versions 1 or 2, or 0 to indicate the legacy 11MPCore GIC.
-     * (Internally, 0xffffffff also indicates "not a GIC but an NVIC".)
      */
     DEFINE_PROP_UINT32("revision", GICState, revision, 1),
     /* True if the GIC should implement the security extensions */
diff --git a/hw/intc/gic_internal.h b/hw/intc/gic_internal.h
index 20c1e8a..a1f9320 100644
--- a/hw/intc/gic_internal.h
+++ b/hw/intc/gic_internal.h
@@ -25,9 +25,7 @@
 
 #define ALL_CPU_MASK ((unsigned)(((1 << GIC_NCPU) - 1)))
 
-/* The NVIC has 16 internal vectors.  However these are not exposed
-   through the normal GIC interface.  */
-#define GIC_BASE_IRQ ((s->revision == REV_NVIC) ? 32 : 0)
+#define GIC_BASE_IRQ 0
 
 #define GIC_SET_ENABLED(irq, cm) s->irq_state[irq].enabled |= (cm)
 #define GIC_CLEAR_ENABLED(irq, cm) s->irq_state[irq].enabled &= ~(cm)
@@ -75,7 +73,6 @@
 
 /* The special cases for the revision property: */
 #define REV_11MPCORE 0
-#define REV_NVIC 0xffffffff
 
 void gic_set_pending_private(GICState *s, int cpu, int irq);
 uint32_t gic_acknowledge_irq(GICState *s, int cpu, MemTxAttrs attrs);
@@ -87,7 +84,7 @@ void gic_set_priority(GICState *s, int cpu, int irq, uint8_t val,
 
 static inline bool gic_test_pending(GICState *s, int irq, int cm)
 {
-    if (s->revision == REV_NVIC || s->revision == REV_11MPCORE) {
+    if (s->revision == REV_11MPCORE) {
         return s->irq_state[irq].pending & cm;
     } else {
         /* Edge-triggered interrupts are marked pending on a rising edge, but
-- 
2.1.4