From e44e3482bdb4d0ebde2d8b41830ac2cdb07948fb Mon Sep 17 00:00:00 2001
From: Yang Zhang <yang.z.zhang@intel.com>
Date: Fri, 28 Aug 2015 09:58:54 +0800
Subject: Add qemu 2.4.0

Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5
Signed-off-by: Yang Zhang <yang.z.zhang@intel.com>
---
 qemu/hw/m68k/mcf_intc.c | 168 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 168 insertions(+)
 create mode 100644 qemu/hw/m68k/mcf_intc.c

(limited to 'qemu/hw/m68k/mcf_intc.c')

diff --git a/qemu/hw/m68k/mcf_intc.c b/qemu/hw/m68k/mcf_intc.c
new file mode 100644
index 000000000..f13c7f3ae
--- /dev/null
+++ b/qemu/hw/m68k/mcf_intc.c
@@ -0,0 +1,168 @@
+/*
+ * ColdFire Interrupt Controller emulation.
+ *
+ * Copyright (c) 2007 CodeSourcery.
+ *
+ * This code is licensed under the GPL
+ */
+#include "hw/hw.h"
+#include "hw/m68k/mcf.h"
+#include "exec/address-spaces.h"
+
+typedef struct {
+    MemoryRegion iomem;
+    uint64_t ipr;
+    uint64_t imr;
+    uint64_t ifr;
+    uint64_t enabled;
+    uint8_t icr[64];
+    M68kCPU *cpu;
+    int active_vector;
+} mcf_intc_state;
+
+static void mcf_intc_update(mcf_intc_state *s)
+{
+    uint64_t active;
+    int i;
+    int best;
+    int best_level;
+
+    active = (s->ipr | s->ifr) & s->enabled & ~s->imr;
+    best_level = 0;
+    best = 64;
+    if (active) {
+        for (i = 0; i < 64; i++) {
+            if ((active & 1) != 0 && s->icr[i] >= best_level) {
+                best_level = s->icr[i];
+                best = i;
+            }
+            active >>= 1;
+        }
+    }
+    s->active_vector = ((best == 64) ? 24 : (best + 64));
+    m68k_set_irq_level(s->cpu, best_level, s->active_vector);
+}
+
+static uint64_t mcf_intc_read(void *opaque, hwaddr addr,
+                              unsigned size)
+{
+    int offset;
+    mcf_intc_state *s = (mcf_intc_state *)opaque;
+    offset = addr & 0xff;
+    if (offset >= 0x40 && offset < 0x80) {
+        return s->icr[offset - 0x40];
+    }
+    switch (offset) {
+    case 0x00:
+        return (uint32_t)(s->ipr >> 32);
+    case 0x04:
+        return (uint32_t)s->ipr;
+    case 0x08:
+        return (uint32_t)(s->imr >> 32);
+    case 0x0c:
+        return (uint32_t)s->imr;
+    case 0x10:
+        return (uint32_t)(s->ifr >> 32);
+    case 0x14:
+        return (uint32_t)s->ifr;
+    case 0xe0: /* SWIACK.  */
+        return s->active_vector;
+    case 0xe1: case 0xe2: case 0xe3: case 0xe4:
+    case 0xe5: case 0xe6: case 0xe7:
+        /* LnIACK */
+        hw_error("mcf_intc_read: LnIACK not implemented\n");
+    default:
+        return 0;
+    }
+}
+
+static void mcf_intc_write(void *opaque, hwaddr addr,
+                           uint64_t val, unsigned size)
+{
+    int offset;
+    mcf_intc_state *s = (mcf_intc_state *)opaque;
+    offset = addr & 0xff;
+    if (offset >= 0x40 && offset < 0x80) {
+        int n = offset - 0x40;
+        s->icr[n] = val;
+        if (val == 0)
+            s->enabled &= ~(1ull << n);
+        else
+            s->enabled |= (1ull << n);
+        mcf_intc_update(s);
+        return;
+    }
+    switch (offset) {
+    case 0x00: case 0x04:
+        /* Ignore IPR writes.  */
+        return;
+    case 0x08:
+        s->imr = (s->imr & 0xffffffff) | ((uint64_t)val << 32);
+        break;
+    case 0x0c:
+        s->imr = (s->imr & 0xffffffff00000000ull) | (uint32_t)val;
+        break;
+    case 0x1c:
+        if (val & 0x40) {
+            s->imr = ~0ull;
+        } else {
+            s->imr |= (0x1ull << (val & 0x3f));
+        }
+        break;
+    case 0x1d:
+        if (val & 0x40) {
+            s->imr = 0ull;
+        } else {
+            s->imr &= ~(0x1ull << (val & 0x3f));
+        }
+        break;
+    default:
+        hw_error("mcf_intc_write: Bad write offset %d\n", offset);
+        break;
+    }
+    mcf_intc_update(s);
+}
+
+static void mcf_intc_set_irq(void *opaque, int irq, int level)
+{
+    mcf_intc_state *s = (mcf_intc_state *)opaque;
+    if (irq >= 64)
+        return;
+    if (level)
+        s->ipr |= 1ull << irq;
+    else
+        s->ipr &= ~(1ull << irq);
+    mcf_intc_update(s);
+}
+
+static void mcf_intc_reset(mcf_intc_state *s)
+{
+    s->imr = ~0ull;
+    s->ipr = 0;
+    s->ifr = 0;
+    s->enabled = 0;
+    memset(s->icr, 0, 64);
+    s->active_vector = 24;
+}
+
+static const MemoryRegionOps mcf_intc_ops = {
+    .read = mcf_intc_read,
+    .write = mcf_intc_write,
+    .endianness = DEVICE_NATIVE_ENDIAN,
+};
+
+qemu_irq *mcf_intc_init(MemoryRegion *sysmem,
+                        hwaddr base,
+                        M68kCPU *cpu)
+{
+    mcf_intc_state *s;
+
+    s = g_malloc0(sizeof(mcf_intc_state));
+    s->cpu = cpu;
+    mcf_intc_reset(s);
+
+    memory_region_init_io(&s->iomem, NULL, &mcf_intc_ops, s, "mcf", 0x100);
+    memory_region_add_subregion(sysmem, base, &s->iomem);
+
+    return qemu_allocate_irqs(mcf_intc_set_irq, s, 64);
+}
-- 
cgit 1.2.3-korg