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[Qemu-devel] [PATCH v5 09/16] target-or32: Add PIC support
From: |
Jia Liu |
Subject: |
[Qemu-devel] [PATCH v5 09/16] target-or32: Add PIC support |
Date: |
Mon, 18 Jun 2012 09:02:57 +0800 |
Add OpenRISC Programmable Interrupt Controller.
Signed-off-by: Jia Liu <address@hidden>
---
hw/openrisc_pic.c | 48 ++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 48 insertions(+)
diff --git a/hw/openrisc_pic.c b/hw/openrisc_pic.c
index 0d14bbe..76bd792 100644
--- a/hw/openrisc_pic.c
+++ b/hw/openrisc_pic.c
@@ -28,3 +28,51 @@ void cpu_openrisc_pic_reset(CPUOpenRISCState *env)
env->picmr = 0x00000000;
env->picsr = 0x00000000;
}
+
+/* OpenRISC pic handler */
+static void openrisc_pic_cpu_handler(void *opaque, int irq, int level)
+{
+ CPUOpenRISCState *env = (CPUOpenRISCState *)opaque;
+ int i;
+ uint32_t irq_bit = 1 << irq;
+
+ if (irq > 31 || irq < 0) {
+ return;
+ }
+
+ if (level) {
+ env->picsr |= irq_bit;
+ } else {
+ env->picsr &= ~irq_bit;
+ }
+
+ for (i = 0; i < 32; i++) {
+ if ((env->picsr && (1 << i)) && (env->picmr && (1 << i))) {
+ cpu_interrupt(env, CPU_INTERRUPT_HARD);
+ } else {
+ cpu_reset_interrupt(env, CPU_INTERRUPT_HARD);
+ env->picsr &= ~(1 << i);
+ }
+ }
+}
+
+void cpu_openrisc_pic_init(CPUOpenRISCState *env)
+{
+ int i;
+ qemu_irq *qi;
+ qi = qemu_allocate_irqs(openrisc_pic_cpu_handler, env, NR_IRQS);
+
+ for (i = 0; i < NR_IRQS; i++) {
+ env->irq[i] = qi[i];
+ }
+}
+
+void cpu_openrisc_store_picmr(CPUOpenRISCState *env, uint32_t value)
+{
+ env->picmr |= value;
+}
+
+void cpu_openrisc_store_picsr(CPUOpenRISCState *env, uint32_t value)
+{
+ env->picsr &= ~value;
+}
--
1.7.9.5
- Re: [Qemu-devel] [PATCH v5 02/16] target-or32: Add target machine, (continued)
- [Qemu-devel] [PATCH v5 03/16] target-or32: Add MMU support, Jia Liu, 2012/06/17
- [Qemu-devel] [PATCH v5 04/16] target-or32: Add interrupt support, Jia Liu, 2012/06/17
- [Qemu-devel] [PATCH v5 05/16] target-or32: Add exception support, Jia Liu, 2012/06/17
- [Qemu-devel] [PATCH v5 06/16] target-or32: Add int instruction helpers, Jia Liu, 2012/06/17
- [Qemu-devel] [PATCH v5 08/16] target-or32: Add translation routines, Jia Liu, 2012/06/17
[Qemu-devel] [PATCH v5 09/16] target-or32: Add PIC support,
Jia Liu <=
[Qemu-devel] [PATCH v5 12/16] target-or32: Add system instructions, Jia Liu, 2012/06/17
[Qemu-devel] [PATCH v5 13/16] target-or32: Add gdb stub support, Jia Liu, 2012/06/17
[Qemu-devel] [PATCH v5 14/16] target-or32: Add linux syscall, signal and termbits, Jia Liu, 2012/06/17
[Qemu-devel] [PATCH v5 07/16] target-or32: Add float instruction helpers, Jia Liu, 2012/06/17
[Qemu-devel] [PATCH v5 11/16] target-or32: Add a IIS dummy board, Jia Liu, 2012/06/17