2 * QEMU Sparc SLAVIO interrupt controller emulation
4 * Copyright (c) 2003-2004 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
14 * all copies or substantial portions of the Software.
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
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
25 //#define DEBUG_IRQ_COUNT
28 * Registers of interrupt controller in sun4m.
30 * This is the interrupt controller part of chip STP2001 (Slave I/O), also
31 * produced as NCR89C105. See
32 * http://www.ibiblio.org/pub/historic-linux/early-ports/Sparc/NCR/NCR89C105.txt
34 * There is a system master controller and one for each cpu.
40 typedef struct SLAVIO_INTCTLState {
41 uint32_t intreg_pending[MAX_CPUS];
42 uint32_t intregm_pending;
43 uint32_t intregm_disabled;
45 #ifdef DEBUG_IRQ_COUNT
46 uint64_t irq_count[32];
50 #define INTCTL_MAXADDR 0xf
51 #define INTCTLM_MAXADDR 0xf
53 // per-cpu interrupt controller
54 static uint32_t slavio_intctl_mem_readl(void *opaque, target_phys_addr_t addr)
56 SLAVIO_INTCTLState *s = opaque;
60 cpu = (addr & (MAX_CPUS - 1) * TARGET_PAGE_SIZE) >> 12;
61 saddr = (addr & INTCTL_MAXADDR) >> 2;
64 return s->intreg_pending[cpu];
71 static void slavio_intctl_mem_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
73 SLAVIO_INTCTLState *s = opaque;
77 cpu = (addr & (MAX_CPUS - 1) * TARGET_PAGE_SIZE) >> 12;
78 saddr = (addr & INTCTL_MAXADDR) >> 2;
80 case 1: // clear pending softints
84 s->intreg_pending[cpu] &= ~val;
86 case 2: // set softint
88 s->intreg_pending[cpu] |= val;
95 static CPUReadMemoryFunc *slavio_intctl_mem_read[3] = {
96 slavio_intctl_mem_readl,
97 slavio_intctl_mem_readl,
98 slavio_intctl_mem_readl,
101 static CPUWriteMemoryFunc *slavio_intctl_mem_write[3] = {
102 slavio_intctl_mem_writel,
103 slavio_intctl_mem_writel,
104 slavio_intctl_mem_writel,
107 // master system interrupt controller
108 static uint32_t slavio_intctlm_mem_readl(void *opaque, target_phys_addr_t addr)
110 SLAVIO_INTCTLState *s = opaque;
113 saddr = (addr & INTCTLM_MAXADDR) >> 2;
116 return s->intregm_pending;
118 return s->intregm_disabled;
120 return s->target_cpu;
127 static void slavio_intctlm_mem_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
129 SLAVIO_INTCTLState *s = opaque;
132 saddr = (addr & INTCTLM_MAXADDR) >> 2;
134 case 2: // clear (enable)
137 s->intregm_disabled &= ~val;
139 case 3: // set (disable, clear pending)
142 s->intregm_disabled |= val;
143 s->intregm_pending &= ~val;
146 s->target_cpu = val & (MAX_CPUS - 1);
153 static CPUReadMemoryFunc *slavio_intctlm_mem_read[3] = {
154 slavio_intctlm_mem_readl,
155 slavio_intctlm_mem_readl,
156 slavio_intctlm_mem_readl,
159 static CPUWriteMemoryFunc *slavio_intctlm_mem_write[3] = {
160 slavio_intctlm_mem_writel,
161 slavio_intctlm_mem_writel,
162 slavio_intctlm_mem_writel,
165 void slavio_pic_info(void *opaque)
167 SLAVIO_INTCTLState *s = opaque;
170 for (i = 0; i < MAX_CPUS; i++) {
171 term_printf("per-cpu %d: pending 0x%08x\n", i, s->intreg_pending[i]);
173 term_printf("master: pending 0x%08x, disabled 0x%08x\n", s->intregm_pending, s->intregm_disabled);
176 void slavio_irq_info(void *opaque)
178 #ifndef DEBUG_IRQ_COUNT
179 term_printf("irq statistic code not compiled.\n");
181 SLAVIO_INTCTLState *s = opaque;
185 term_printf("IRQ statistics:\n");
186 for (i = 0; i < 32; i++) {
187 count = s->irq_count[i];
189 term_printf("%2d: %lld\n", i, count);
194 static const uint32_t intbit_to_level[32] = {
195 2, 3, 5, 7, 9, 11, 0, 14, 3, 5, 7, 9, 11, 13, 12, 12,
196 6, 0, 4, 10, 8, 0, 11, 0, 0, 0, 0, 0, 15, 0, 0, 0,
200 * "irq" here is the bit number in the system interrupt register to
201 * separate serial and keyboard interrupts sharing a level.
203 void slavio_pic_set_irq(void *opaque, int irq, int level)
205 SLAVIO_INTCTLState *s = opaque;
208 uint32_t mask = 1 << irq;
209 uint32_t pil = intbit_to_level[irq];
212 s->intregm_pending |= mask;
213 s->intreg_pending[s->target_cpu] |= 1 << pil;
216 s->intregm_pending &= ~mask;
217 s->intreg_pending[s->target_cpu] &= ~(1 << pil);
220 !(s->intregm_disabled & mask) &&
221 !(s->intregm_disabled & 0x80000000) &&
222 (pil == 15 || (pil > cpu_single_env->psrpil && cpu_single_env->psret == 1))) {
223 #ifdef DEBUG_IRQ_COUNT
227 cpu_single_env->interrupt_index = TT_EXTINT | pil;
228 cpu_interrupt(cpu_single_env, CPU_INTERRUPT_HARD);
234 static void slavio_intctl_save(QEMUFile *f, void *opaque)
236 SLAVIO_INTCTLState *s = opaque;
239 for (i = 0; i < MAX_CPUS; i++) {
240 qemu_put_be32s(f, &s->intreg_pending[i]);
242 qemu_put_be32s(f, &s->intregm_pending);
243 qemu_put_be32s(f, &s->intregm_disabled);
244 qemu_put_be32s(f, &s->target_cpu);
247 static int slavio_intctl_load(QEMUFile *f, void *opaque, int version_id)
249 SLAVIO_INTCTLState *s = opaque;
255 for (i = 0; i < MAX_CPUS; i++) {
256 qemu_get_be32s(f, &s->intreg_pending[i]);
258 qemu_get_be32s(f, &s->intregm_pending);
259 qemu_get_be32s(f, &s->intregm_disabled);
260 qemu_get_be32s(f, &s->target_cpu);
264 static void slavio_intctl_reset(void *opaque)
266 SLAVIO_INTCTLState *s = opaque;
269 for (i = 0; i < MAX_CPUS; i++) {
270 s->intreg_pending[i] = 0;
272 s->intregm_disabled = 0xffffffff;
273 s->intregm_pending = 0;
277 void *slavio_intctl_init(uint32_t addr, uint32_t addrg)
279 int slavio_intctl_io_memory, slavio_intctlm_io_memory, i;
280 SLAVIO_INTCTLState *s;
282 s = qemu_mallocz(sizeof(SLAVIO_INTCTLState));
286 for (i = 0; i < MAX_CPUS; i++) {
287 slavio_intctl_io_memory = cpu_register_io_memory(0, slavio_intctl_mem_read, slavio_intctl_mem_write, s);
288 cpu_register_physical_memory(addr + i * TARGET_PAGE_SIZE, INTCTL_MAXADDR, slavio_intctl_io_memory);
291 slavio_intctlm_io_memory = cpu_register_io_memory(0, slavio_intctlm_mem_read, slavio_intctlm_mem_write, s);
292 cpu_register_physical_memory(addrg, INTCTLM_MAXADDR, slavio_intctlm_io_memory);
294 register_savevm("slavio_intctl", addr, 1, slavio_intctl_save, slavio_intctl_load, s);
295 qemu_register_reset(slavio_intctl_reset, s);
296 slavio_intctl_reset(s);