X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=qemu%2Fhw%2Fopenrisc%2Fpic_cpu.c;fp=qemu%2Fhw%2Fopenrisc%2Fpic_cpu.c;h=2af1d6013ad5f64a6b890fc70c2e8594b2b4e58f;hb=e44e3482bdb4d0ebde2d8b41830ac2cdb07948fb;hp=0000000000000000000000000000000000000000;hpb=9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00;p=kvmfornfv.git

diff --git a/qemu/hw/openrisc/pic_cpu.c b/qemu/hw/openrisc/pic_cpu.c
new file mode 100644
index 000000000..2af1d6013
--- /dev/null
+++ b/qemu/hw/openrisc/pic_cpu.c
@@ -0,0 +1,60 @@
+/*
+ * OpenRISC Programmable Interrupt Controller support.
+ *
+ * Copyright (c) 2011-2012 Jia Liu <proljc@gmail.com>
+ *                         Feng Gao <gf91597@gmail.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "hw/hw.h"
+#include "cpu.h"
+
+/* OpenRISC pic handler */
+static void openrisc_pic_cpu_handler(void *opaque, int irq, int level)
+{
+    OpenRISCCPU *cpu = (OpenRISCCPU *)opaque;
+    CPUState *cs = CPU(cpu);
+    uint32_t irq_bit;
+
+    if (irq > 31 || irq < 0) {
+        return;
+    }
+
+    irq_bit = 1U << irq;
+
+    if (level) {
+        cpu->env.picsr |= irq_bit;
+    } else {
+        cpu->env.picsr &= ~irq_bit;
+    }
+
+    if (cpu->env.picsr & cpu->env.picmr) {
+        cpu_interrupt(cs, CPU_INTERRUPT_HARD);
+    } else {
+        cpu_reset_interrupt(cs, CPU_INTERRUPT_HARD);
+        cpu->env.picsr = 0;
+    }
+}
+
+void cpu_openrisc_pic_init(OpenRISCCPU *cpu)
+{
+    int i;
+    qemu_irq *qi;
+    qi = qemu_allocate_irqs(openrisc_pic_cpu_handler, cpu, NR_IRQS);
+
+    for (i = 0; i < NR_IRQS; i++) {
+        cpu->env.irq[i] = qi[i];
+    }
+}