2 * QEMU Sparc Sun4c 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
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27 //#define DEBUG_IRQ_COUNT
31 #define DPRINTF(fmt, ...) \
32 do { printf("IRQ: " fmt , ## __VA_ARGS__); } while (0)
34 #define DPRINTF(fmt, ...)
38 * Registers of interrupt controller in sun4c.
44 typedef struct Sun4c_INTCTLState {
45 #ifdef DEBUG_IRQ_COUNT
49 const uint32_t *intbit_to_level;
57 static void sun4c_check_interrupts(void *opaque);
59 static uint32_t sun4c_intctl_mem_readb(void *opaque, target_phys_addr_t addr)
61 Sun4c_INTCTLState *s = opaque;
65 DPRINTF("read reg 0x" TARGET_FMT_plx " = %x\n", addr, ret);
70 static void sun4c_intctl_mem_writeb(void *opaque, target_phys_addr_t addr,
73 Sun4c_INTCTLState *s = opaque;
75 DPRINTF("write reg 0x" TARGET_FMT_plx " = %x\n", addr, val);
78 sun4c_check_interrupts(s);
81 static CPUReadMemoryFunc *sun4c_intctl_mem_read[3] = {
82 sun4c_intctl_mem_readb,
87 static CPUWriteMemoryFunc *sun4c_intctl_mem_write[3] = {
88 sun4c_intctl_mem_writeb,
93 void sun4c_pic_info(Monitor *mon, void *opaque)
95 Sun4c_INTCTLState *s = opaque;
97 monitor_printf(mon, "master: pending 0x%2.2x, enabled 0x%2.2x\n",
101 void sun4c_irq_info(Monitor *mon, void *opaque)
103 #ifndef DEBUG_IRQ_COUNT
104 monitor_printf(mon, "irq statistic code not compiled.\n");
106 Sun4c_INTCTLState *s = opaque;
109 monitor_printf(mon, "IRQ statistics:\n");
110 count = s->irq_count;
112 monitor_printf(mon, " %" PRId64 "\n", count);
116 static const uint32_t intbit_to_level[] = { 0, 1, 4, 6, 8, 10, 0, 14, };
118 static void sun4c_check_interrupts(void *opaque)
120 Sun4c_INTCTLState *s = opaque;
121 uint32_t pil_pending;
125 if (s->pending && !(s->reg & 0x80000000)) {
126 for (i = 0; i < 8; i++) {
127 if (s->pending & (1 << i))
128 pil_pending |= 1 << intbit_to_level[i];
132 for (i = 0; i < MAX_PILS; i++) {
133 if (pil_pending & (1 << i)) {
134 if (!(s->pil_out & (1 << i)))
135 qemu_irq_raise(s->cpu_irqs[i]);
137 if (s->pil_out & (1 << i))
138 qemu_irq_lower(s->cpu_irqs[i]);
141 s->pil_out = pil_pending;
145 * "irq" here is the bit number in the system interrupt register
147 static void sun4c_set_irq(void *opaque, int irq, int level)
149 Sun4c_INTCTLState *s = opaque;
150 uint32_t mask = 1 << irq;
151 uint32_t pil = intbit_to_level[irq];
153 DPRINTF("Set irq %d -> pil %d level %d\n", irq, pil,
157 #ifdef DEBUG_IRQ_COUNT
164 sun4c_check_interrupts(s);
168 static void sun4c_intctl_save(QEMUFile *f, void *opaque)
170 Sun4c_INTCTLState *s = opaque;
172 qemu_put_8s(f, &s->reg);
173 qemu_put_8s(f, &s->pending);
176 static int sun4c_intctl_load(QEMUFile *f, void *opaque, int version_id)
178 Sun4c_INTCTLState *s = opaque;
183 qemu_get_8s(f, &s->reg);
184 qemu_get_8s(f, &s->pending);
189 static void sun4c_intctl_reset(void *opaque)
191 Sun4c_INTCTLState *s = opaque;
197 void *sun4c_intctl_init(target_phys_addr_t addr, qemu_irq **irq,
198 qemu_irq *parent_irq)
200 int sun4c_intctl_io_memory;
201 Sun4c_INTCTLState *s;
203 s = qemu_mallocz(sizeof(Sun4c_INTCTLState));
205 sun4c_intctl_io_memory = cpu_register_io_memory(sun4c_intctl_mem_read,
206 sun4c_intctl_mem_write, s);
207 cpu_register_physical_memory(addr, INTCTL_SIZE, sun4c_intctl_io_memory);
208 s->cpu_irqs = parent_irq;
210 register_savevm("sun4c_intctl", addr, 1, sun4c_intctl_save,
211 sun4c_intctl_load, s);
213 qemu_register_reset(sun4c_intctl_reset, s);
214 *irq = qemu_allocate_irqs(sun4c_set_irq, s, 8);
216 sun4c_intctl_reset(s);