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-rw-r--r--Makefile.target2
-rw-r--r--hw/heathrow_pic.c168
2 files changed, 169 insertions, 1 deletions
diff --git a/Makefile.target b/Makefile.target
index 434af9b367..de7d7ebe4c 100644
--- a/Makefile.target
+++ b/Makefile.target
@@ -346,7 +346,7 @@ endif
ifeq ($(TARGET_ARCH), ppc)
VL_OBJS+= ppc.o ide.o ne2000.o pckbd.o vga.o $(SOUND_HW) dma.o $(AUDIODRV)
VL_OBJS+= mc146818rtc.o serial.o i8259.o i8254.o fdc.o m48t59.o
-VL_OBJS+= ppc_prep.o ppc_chrp.o cuda.o adb.o openpic.o mixeng.o
+VL_OBJS+= ppc_prep.o ppc_chrp.o cuda.o adb.o openpic.o heathrow_pic.o mixeng.o
endif
ifeq ($(TARGET_BASE_ARCH), sparc)
VL_OBJS+= sun4m.o tcx.o lance.o iommu.o m48t08.o magic-load.o slavio_intctl.o slavio_timer.o slavio_serial.o fdc.o esp.o
diff --git a/hw/heathrow_pic.c b/hw/heathrow_pic.c
new file mode 100644
index 0000000000..d65da9a9fe
--- /dev/null
+++ b/hw/heathrow_pic.c
@@ -0,0 +1,168 @@
+/*
+ * Heathrow PIC support (standard PowerMac PIC)
+ *
+ * Copyright (c) 2005 Fabrice Bellard
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#include "vl.h"
+
+//#define DEBUG
+
+typedef struct HeathrowPIC {
+ uint32_t events;
+ uint32_t mask;
+ uint32_t levels;
+ uint32_t level_triggered;
+} HeathrowPIC;
+
+struct HeathrowPICS {
+ HeathrowPIC pics[2];
+};
+
+static inline int check_irq(HeathrowPIC *pic)
+{
+ return (pic->events | (pic->levels & pic->level_triggered)) & pic->mask;
+}
+
+/* update the CPU irq state */
+static void heathrow_pic_update(HeathrowPICS *s)
+{
+ if (check_irq(&s->pics[0]) || check_irq(&s->pics[1])) {
+ cpu_interrupt(cpu_single_env, CPU_INTERRUPT_HARD);
+ } else {
+ cpu_reset_interrupt(cpu_single_env, CPU_INTERRUPT_HARD);
+ }
+}
+
+static void pic_writel (void *opaque, target_phys_addr_t addr, uint32_t value)
+{
+ HeathrowPICS *s = opaque;
+ HeathrowPIC *pic;
+ unsigned int n;
+
+ value = bswap32(value);
+#ifdef DEBUG
+ printf("pic_writel: %08x: %08x\n",
+ addr, value);
+#endif
+ n = ((addr & 0xfff) - 0x10) >> 4;
+ if (n >= 2)
+ return;
+ pic = &s->pics[n];
+ switch(addr & 0xf) {
+ case 0x04:
+ pic->mask = value;
+ heathrow_pic_update(s);
+ break;
+ case 0x08:
+ /* do not reset level triggered IRQs */
+ value &= ~pic->level_triggered;
+ pic->events &= ~value;
+ heathrow_pic_update(s);
+ break;
+ default:
+ break;
+ }
+}
+
+static uint32_t pic_readl (void *opaque, target_phys_addr_t addr)
+{
+ HeathrowPICS *s = opaque;
+ HeathrowPIC *pic;
+ unsigned int n;
+ uint32_t value;
+
+ n = ((addr & 0xfff) - 0x10) >> 4;
+ if (n >= 2) {
+ value = 0;
+ } else {
+ pic = &s->pics[n];
+ switch(addr & 0xf) {
+ case 0x0:
+ value = pic->events;
+ break;
+ case 0x4:
+ value = pic->mask;
+ break;
+ case 0xc:
+ value = pic->levels;
+ break;
+ default:
+ value = 0;
+ break;
+ }
+ }
+#ifdef DEBUG
+ printf("pic_readl: %08x: %08x\n",
+ addr, value);
+#endif
+ value = bswap32(value);
+ return value;
+}
+
+static CPUWriteMemoryFunc *pic_write[] = {
+ &pic_writel,
+ &pic_writel,
+ &pic_writel,
+};
+
+static CPUReadMemoryFunc *pic_read[] = {
+ &pic_readl,
+ &pic_readl,
+ &pic_readl,
+};
+
+
+void heathrow_pic_set_irq(void *opaque, int num, int level)
+{
+ HeathrowPICS *s = opaque;
+ HeathrowPIC *pic;
+ unsigned int irq_bit;
+
+#if defined(DEBUG)
+ {
+ static int last_level[64];
+ if (last_level[num] != level) {
+ printf("set_irq: num=0x%02x level=%d\n", num, level);
+ last_level[num] = level;
+ }
+ }
+#endif
+ pic = &s->pics[1 - (num >> 5)];
+ irq_bit = 1 << (num & 0x1f);
+ if (level) {
+ pic->events |= irq_bit & ~pic->level_triggered;
+ pic->levels |= irq_bit;
+ } else {
+ pic->levels &= ~irq_bit;
+ }
+ heathrow_pic_update(s);
+}
+
+HeathrowPICS *heathrow_pic_init(int *pmem_index)
+{
+ HeathrowPICS *s;
+
+ s = qemu_mallocz(sizeof(HeathrowPICS));
+ s->pics[0].level_triggered = 0;
+ s->pics[1].level_triggered = 0x1ff00000;
+ *pmem_index = cpu_register_io_memory(0, pic_read, pic_write, s);
+ return s;
+}