2 * QEMU Sparc SBI interrupt controller emulation
4 * Based on slavio_intctl, copyright (c) 2003-2005 Fabrice Bellard
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included in
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16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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31 #define DPRINTF(fmt, ...) \
32 do { printf("IRQ: " fmt , ## __VA_ARGS__); } while (0)
34 #define DPRINTF(fmt, ...)
41 typedef struct SBIState {
42 uint32_t regs[SBI_NREGS];
43 uint32_t intreg_pending[MAX_CPUS];
44 qemu_irq *cpu_irqs[MAX_CPUS];
45 uint32_t pil_out[MAX_CPUS];
48 #define SBI_SIZE (SBI_NREGS * 4)
50 static void sbi_check_interrupts(void *opaque)
54 static void sbi_set_irq(void *opaque, int irq, int level)
58 static void sbi_set_timer_irq_cpu(void *opaque, int cpu, int level)
62 static uint32_t sbi_mem_readl(void *opaque, target_phys_addr_t addr)
73 DPRINTF("read system reg 0x" TARGET_FMT_plx " = %x\n", addr, ret);
78 static void sbi_mem_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
84 DPRINTF("write system reg 0x" TARGET_FMT_plx " = %x\n", addr, val);
92 static CPUReadMemoryFunc *sbi_mem_read[3] = {
98 static CPUWriteMemoryFunc *sbi_mem_write[3] = {
104 static void sbi_save(QEMUFile *f, void *opaque)
106 SBIState *s = opaque;
109 for (i = 0; i < MAX_CPUS; i++) {
110 qemu_put_be32s(f, &s->intreg_pending[i]);
114 static int sbi_load(QEMUFile *f, void *opaque, int version_id)
116 SBIState *s = opaque;
122 for (i = 0; i < MAX_CPUS; i++) {
123 qemu_get_be32s(f, &s->intreg_pending[i]);
125 sbi_check_interrupts(s);
130 static void sbi_reset(void *opaque)
132 SBIState *s = opaque;
135 for (i = 0; i < MAX_CPUS; i++) {
136 s->intreg_pending[i] = 0;
138 sbi_check_interrupts(s);
141 void *sbi_init(target_phys_addr_t addr, qemu_irq **irq, qemu_irq **cpu_irq,
142 qemu_irq **parent_irq)
148 s = qemu_mallocz(sizeof(SBIState));
150 for (i = 0; i < MAX_CPUS; i++) {
151 s->cpu_irqs[i] = parent_irq[i];
154 sbi_io_memory = cpu_register_io_memory(0, sbi_mem_read, sbi_mem_write, s);
155 cpu_register_physical_memory(addr, SBI_SIZE, sbi_io_memory);
157 register_savevm("sbi", addr, 1, sbi_save, sbi_load, s);
158 qemu_register_reset(sbi_reset, 0, s);
159 *irq = qemu_allocate_irqs(sbi_set_irq, s, 32);
160 *cpu_irq = qemu_allocate_irqs(sbi_set_timer_irq_cpu, s, MAX_CPUS);