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
8 * in the Software without restriction, including without limitation the rights
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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,
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27 //#define DEBUG_IRQ_COUNT
31 #define DPRINTF(fmt, args...) \
32 do { printf("IRQ: " fmt , ##args); } while (0)
34 #define DPRINTF(fmt, args...)
38 * Registers of interrupt controller in sun4c.
44 typedef struct Sun4c_INTCTLState {
45 #ifdef DEBUG_IRQ_COUNT
49 const uint32_t *intbit_to_level;
55 #define INTCTL_MAXADDR 0
56 #define INTCTL_SIZE (INTCTL_MAXADDR + 1)
58 static void sun4c_check_interrupts(void *opaque);
60 static uint32_t sun4c_intctl_mem_readb(void *opaque, target_phys_addr_t addr)
62 Sun4c_INTCTLState *s = opaque;
66 DPRINTF("read reg 0x" TARGET_FMT_plx " = %x\n", addr, ret);
71 static void sun4c_intctl_mem_writeb(void *opaque, target_phys_addr_t addr,
74 Sun4c_INTCTLState *s = opaque;
76 DPRINTF("write reg 0x" TARGET_FMT_plx " = %x\n", addr, val);
79 sun4c_check_interrupts(s);
82 static CPUReadMemoryFunc *sun4c_intctl_mem_read[3] = {
83 sun4c_intctl_mem_readb,
88 static CPUWriteMemoryFunc *sun4c_intctl_mem_write[3] = {
89 sun4c_intctl_mem_writeb,
94 void sun4c_pic_info(void *opaque)
96 Sun4c_INTCTLState *s = opaque;
98 term_printf("master: pending 0x%2.2x, enabled 0x%2.2x\n", s->pending,
102 void sun4c_irq_info(void *opaque)
104 #ifndef DEBUG_IRQ_COUNT
105 term_printf("irq statistic code not compiled.\n");
107 Sun4c_INTCTLState *s = opaque;
110 term_printf("IRQ statistics:\n");
111 count = s->irq_count[i];
113 term_printf("%2d: %" PRId64 "\n", i, count);
117 static const uint32_t intbit_to_level[] = { 0, 1, 4, 6, 8, 10, 0, 14, };
119 static void sun4c_check_interrupts(void *opaque)
121 Sun4c_INTCTLState *s = opaque;
122 uint32_t pil_pending;
125 DPRINTF("pending %x disabled %x\n", pending, s->intregm_disabled);
127 if (s->pending && !(s->reg & 0x80000000)) {
128 for (i = 0; i < 8; i++) {
129 if (s->pending & (1 << i))
130 pil_pending |= 1 << intbit_to_level[i];
134 for (i = 0; i < MAX_PILS; i++) {
135 if (pil_pending & (1 << i)) {
136 if (!(s->pil_out & (1 << i)))
137 qemu_irq_raise(s->cpu_irqs[i]);
139 if (s->pil_out & (1 << i))
140 qemu_irq_lower(s->cpu_irqs[i]);
143 s->pil_out = pil_pending;
147 * "irq" here is the bit number in the system interrupt register
149 static void sun4c_set_irq(void *opaque, int irq, int level)
151 Sun4c_INTCTLState *s = opaque;
152 uint32_t mask = 1 << irq;
153 uint32_t pil = intbit_to_level[irq];
155 DPRINTF("Set irq %d -> pil %d level %d\n", irq, pil,
159 #ifdef DEBUG_IRQ_COUNT
166 sun4c_check_interrupts(s);
170 static void sun4c_intctl_save(QEMUFile *f, void *opaque)
172 Sun4c_INTCTLState *s = opaque;
174 qemu_put_8s(f, &s->reg);
175 qemu_put_8s(f, &s->pending);
178 static int sun4c_intctl_load(QEMUFile *f, void *opaque, int version_id)
180 Sun4c_INTCTLState *s = opaque;
185 qemu_get_8s(f, &s->reg);
186 qemu_get_8s(f, &s->pending);
187 sun4c_check_interrupts(s);
192 static void sun4c_intctl_reset(void *opaque)
194 Sun4c_INTCTLState *s = opaque;
198 sun4c_check_interrupts(s);
201 void *sun4c_intctl_init(target_phys_addr_t addr, qemu_irq **irq,
202 qemu_irq *parent_irq)
204 int sun4c_intctl_io_memory;
205 Sun4c_INTCTLState *s;
207 s = qemu_mallocz(sizeof(Sun4c_INTCTLState));
211 sun4c_intctl_io_memory = cpu_register_io_memory(0, sun4c_intctl_mem_read,
212 sun4c_intctl_mem_write, s);
213 cpu_register_physical_memory(addr, INTCTL_SIZE, sun4c_intctl_io_memory);
214 s->cpu_irqs = parent_irq;
216 register_savevm("sun4c_intctl", addr, 1, sun4c_intctl_save,
217 sun4c_intctl_load, s);
219 qemu_register_reset(sun4c_intctl_reset, s);
220 *irq = qemu_allocate_irqs(sun4c_set_irq, s, 8);
222 sun4c_intctl_reset(s);