diff options
| -rw-r--r-- | Makefile.target | 2 | ||||
| -rw-r--r-- | hw/heathrow_pic.c | 168 |
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; +} |