150 lines
3.8 KiB
C
150 lines
3.8 KiB
C
/*
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* QEMU Sparc SBI interrupt controller emulation
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*
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* Based on slavio_intctl, copyright (c) 2003-2005 Fabrice Bellard
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "sysbus.h"
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//#define DEBUG_IRQ
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#ifdef DEBUG_IRQ
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#define DPRINTF(fmt, ...) \
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do { printf("IRQ: " fmt , ## __VA_ARGS__); } while (0)
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#else
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#define DPRINTF(fmt, ...)
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#endif
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#define MAX_CPUS 16
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#define SBI_NREGS 16
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typedef struct SBIState {
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SysBusDevice busdev;
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uint32_t regs[SBI_NREGS];
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uint32_t intreg_pending[MAX_CPUS];
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qemu_irq cpu_irqs[MAX_CPUS];
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uint32_t pil_out[MAX_CPUS];
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} SBIState;
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#define SBI_SIZE (SBI_NREGS * 4)
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static void sbi_set_irq(void *opaque, int irq, int level)
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{
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}
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static uint32_t sbi_mem_readl(void *opaque, target_phys_addr_t addr)
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{
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SBIState *s = opaque;
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uint32_t saddr, ret;
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saddr = addr >> 2;
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switch (saddr) {
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default:
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ret = s->regs[saddr];
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break;
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}
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DPRINTF("read system reg 0x" TARGET_FMT_plx " = %x\n", addr, ret);
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return ret;
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}
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static void sbi_mem_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
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{
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SBIState *s = opaque;
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uint32_t saddr;
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saddr = addr >> 2;
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DPRINTF("write system reg 0x" TARGET_FMT_plx " = %x\n", addr, val);
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switch (saddr) {
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default:
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s->regs[saddr] = val;
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break;
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}
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}
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static CPUReadMemoryFunc * const sbi_mem_read[3] = {
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NULL,
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NULL,
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sbi_mem_readl,
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};
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static CPUWriteMemoryFunc * const sbi_mem_write[3] = {
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NULL,
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NULL,
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sbi_mem_writel,
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};
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static const VMStateDescription vmstate_sbi = {
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.name ="sbi",
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.version_id = 1,
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.minimum_version_id = 1,
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.minimum_version_id_old = 1,
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.fields = (VMStateField []) {
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VMSTATE_UINT32_ARRAY(intreg_pending, SBIState, MAX_CPUS),
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VMSTATE_END_OF_LIST()
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}
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};
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static void sbi_reset(DeviceState *d)
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{
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SBIState *s = container_of(d, SBIState, busdev.qdev);
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unsigned int i;
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for (i = 0; i < MAX_CPUS; i++) {
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s->intreg_pending[i] = 0;
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}
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}
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static int sbi_init1(SysBusDevice *dev)
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{
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SBIState *s = FROM_SYSBUS(SBIState, dev);
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int sbi_io_memory;
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unsigned int i;
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qdev_init_gpio_in(&dev->qdev, sbi_set_irq, 32 + MAX_CPUS);
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for (i = 0; i < MAX_CPUS; i++) {
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sysbus_init_irq(dev, &s->cpu_irqs[i]);
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}
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sbi_io_memory = cpu_register_io_memory(sbi_mem_read, sbi_mem_write, s);
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sysbus_init_mmio(dev, SBI_SIZE, sbi_io_memory);
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sbi_reset(&s->busdev.qdev);
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return 0;
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}
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static SysBusDeviceInfo sbi_info = {
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.init = sbi_init1,
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.qdev.name = "sbi",
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.qdev.size = sizeof(SBIState),
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.qdev.vmsd = &vmstate_sbi,
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.qdev.reset = sbi_reset,
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};
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static void sbi_register_devices(void)
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{
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sysbus_register_withprop(&sbi_info);
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}
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device_init(sbi_register_devices)
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