diff options
Diffstat (limited to 'hw/heathrow_pic.c')
| -rw-r--r-- | hw/heathrow_pic.c | 168 |
1 files changed, 0 insertions, 168 deletions
diff --git a/hw/heathrow_pic.c b/hw/heathrow_pic.c deleted file mode 100644 index 4980cef..0000000 --- a/hw/heathrow_pic.c +++ /dev/null @@ -1,168 +0,0 @@ -/* - * 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(first_cpu, CPU_INTERRUPT_HARD); - } else { - cpu_reset_interrupt(first_cpu, 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; -} |