raspi: fix SD card with recent sdhci changes
[qemu/cris-port.git] / hw / arm / pxa2xx_pic.c
blob8a39b1caca0801fedc093e275cbeccbedcd252f9
1 /*
2 * Intel XScale PXA Programmable Interrupt Controller.
4 * Copyright (c) 2006 Openedhand Ltd.
5 * Copyright (c) 2006 Thorsten Zitterell
6 * Written by Andrzej Zaborowski <balrog@zabor.org>
8 * This code is licensed under the GPL.
9 */
11 #include "qemu/osdep.h"
12 #include "hw/hw.h"
13 #include "hw/arm/pxa.h"
14 #include "hw/sysbus.h"
16 #define ICIP 0x00 /* Interrupt Controller IRQ Pending register */
17 #define ICMR 0x04 /* Interrupt Controller Mask register */
18 #define ICLR 0x08 /* Interrupt Controller Level register */
19 #define ICFP 0x0c /* Interrupt Controller FIQ Pending register */
20 #define ICPR 0x10 /* Interrupt Controller Pending register */
21 #define ICCR 0x14 /* Interrupt Controller Control register */
22 #define ICHP 0x18 /* Interrupt Controller Highest Priority register */
23 #define IPR0 0x1c /* Interrupt Controller Priority register 0 */
24 #define IPR31 0x98 /* Interrupt Controller Priority register 31 */
25 #define ICIP2 0x9c /* Interrupt Controller IRQ Pending register 2 */
26 #define ICMR2 0xa0 /* Interrupt Controller Mask register 2 */
27 #define ICLR2 0xa4 /* Interrupt Controller Level register 2 */
28 #define ICFP2 0xa8 /* Interrupt Controller FIQ Pending register 2 */
29 #define ICPR2 0xac /* Interrupt Controller Pending register 2 */
30 #define IPR32 0xb0 /* Interrupt Controller Priority register 32 */
31 #define IPR39 0xcc /* Interrupt Controller Priority register 39 */
33 #define PXA2XX_PIC_SRCS 40
35 #define TYPE_PXA2XX_PIC "pxa2xx_pic"
36 #define PXA2XX_PIC(obj) \
37 OBJECT_CHECK(PXA2xxPICState, (obj), TYPE_PXA2XX_PIC)
39 typedef struct {
40 /*< private >*/
41 SysBusDevice parent_obj;
42 /*< public >*/
44 MemoryRegion iomem;
45 ARMCPU *cpu;
46 uint32_t int_enabled[2];
47 uint32_t int_pending[2];
48 uint32_t is_fiq[2];
49 uint32_t int_idle;
50 uint32_t priority[PXA2XX_PIC_SRCS];
51 } PXA2xxPICState;
53 static void pxa2xx_pic_update(void *opaque)
55 uint32_t mask[2];
56 PXA2xxPICState *s = (PXA2xxPICState *) opaque;
57 CPUState *cpu = CPU(s->cpu);
59 if (cpu->halted) {
60 mask[0] = s->int_pending[0] & (s->int_enabled[0] | s->int_idle);
61 mask[1] = s->int_pending[1] & (s->int_enabled[1] | s->int_idle);
62 if (mask[0] || mask[1]) {
63 cpu_interrupt(cpu, CPU_INTERRUPT_EXITTB);
67 mask[0] = s->int_pending[0] & s->int_enabled[0];
68 mask[1] = s->int_pending[1] & s->int_enabled[1];
70 if ((mask[0] & s->is_fiq[0]) || (mask[1] & s->is_fiq[1])) {
71 cpu_interrupt(cpu, CPU_INTERRUPT_FIQ);
72 } else {
73 cpu_reset_interrupt(cpu, CPU_INTERRUPT_FIQ);
76 if ((mask[0] & ~s->is_fiq[0]) || (mask[1] & ~s->is_fiq[1])) {
77 cpu_interrupt(cpu, CPU_INTERRUPT_HARD);
78 } else {
79 cpu_reset_interrupt(cpu, CPU_INTERRUPT_HARD);
83 /* Note: Here level means state of the signal on a pin, not
84 * IRQ/FIQ distinction as in PXA Developer Manual. */
85 static void pxa2xx_pic_set_irq(void *opaque, int irq, int level)
87 PXA2xxPICState *s = (PXA2xxPICState *) opaque;
88 int int_set = (irq >= 32);
89 irq &= 31;
91 if (level)
92 s->int_pending[int_set] |= 1 << irq;
93 else
94 s->int_pending[int_set] &= ~(1 << irq);
96 pxa2xx_pic_update(opaque);
99 static inline uint32_t pxa2xx_pic_highest(PXA2xxPICState *s) {
100 int i, int_set, irq;
101 uint32_t bit, mask[2];
102 uint32_t ichp = 0x003f003f; /* Both IDs invalid */
104 mask[0] = s->int_pending[0] & s->int_enabled[0];
105 mask[1] = s->int_pending[1] & s->int_enabled[1];
107 for (i = PXA2XX_PIC_SRCS - 1; i >= 0; i --) {
108 irq = s->priority[i] & 0x3f;
109 if ((s->priority[i] & (1U << 31)) && irq < PXA2XX_PIC_SRCS) {
110 /* Source peripheral ID is valid. */
111 bit = 1 << (irq & 31);
112 int_set = (irq >= 32);
114 if (mask[int_set] & bit & s->is_fiq[int_set]) {
115 /* FIQ asserted */
116 ichp &= 0xffff0000;
117 ichp |= (1 << 15) | irq;
120 if (mask[int_set] & bit & ~s->is_fiq[int_set]) {
121 /* IRQ asserted */
122 ichp &= 0x0000ffff;
123 ichp |= (1U << 31) | (irq << 16);
128 return ichp;
131 static uint64_t pxa2xx_pic_mem_read(void *opaque, hwaddr offset,
132 unsigned size)
134 PXA2xxPICState *s = (PXA2xxPICState *) opaque;
136 switch (offset) {
137 case ICIP: /* IRQ Pending register */
138 return s->int_pending[0] & ~s->is_fiq[0] & s->int_enabled[0];
139 case ICIP2: /* IRQ Pending register 2 */
140 return s->int_pending[1] & ~s->is_fiq[1] & s->int_enabled[1];
141 case ICMR: /* Mask register */
142 return s->int_enabled[0];
143 case ICMR2: /* Mask register 2 */
144 return s->int_enabled[1];
145 case ICLR: /* Level register */
146 return s->is_fiq[0];
147 case ICLR2: /* Level register 2 */
148 return s->is_fiq[1];
149 case ICCR: /* Idle mask */
150 return (s->int_idle == 0);
151 case ICFP: /* FIQ Pending register */
152 return s->int_pending[0] & s->is_fiq[0] & s->int_enabled[0];
153 case ICFP2: /* FIQ Pending register 2 */
154 return s->int_pending[1] & s->is_fiq[1] & s->int_enabled[1];
155 case ICPR: /* Pending register */
156 return s->int_pending[0];
157 case ICPR2: /* Pending register 2 */
158 return s->int_pending[1];
159 case IPR0 ... IPR31:
160 return s->priority[0 + ((offset - IPR0 ) >> 2)];
161 case IPR32 ... IPR39:
162 return s->priority[32 + ((offset - IPR32) >> 2)];
163 case ICHP: /* Highest Priority register */
164 return pxa2xx_pic_highest(s);
165 default:
166 printf("%s: Bad register offset " REG_FMT "\n", __FUNCTION__, offset);
167 return 0;
171 static void pxa2xx_pic_mem_write(void *opaque, hwaddr offset,
172 uint64_t value, unsigned size)
174 PXA2xxPICState *s = (PXA2xxPICState *) opaque;
176 switch (offset) {
177 case ICMR: /* Mask register */
178 s->int_enabled[0] = value;
179 break;
180 case ICMR2: /* Mask register 2 */
181 s->int_enabled[1] = value;
182 break;
183 case ICLR: /* Level register */
184 s->is_fiq[0] = value;
185 break;
186 case ICLR2: /* Level register 2 */
187 s->is_fiq[1] = value;
188 break;
189 case ICCR: /* Idle mask */
190 s->int_idle = (value & 1) ? 0 : ~0;
191 break;
192 case IPR0 ... IPR31:
193 s->priority[0 + ((offset - IPR0 ) >> 2)] = value & 0x8000003f;
194 break;
195 case IPR32 ... IPR39:
196 s->priority[32 + ((offset - IPR32) >> 2)] = value & 0x8000003f;
197 break;
198 default:
199 printf("%s: Bad register offset " REG_FMT "\n", __FUNCTION__, offset);
200 return;
202 pxa2xx_pic_update(opaque);
205 /* Interrupt Controller Coprocessor Space Register Mapping */
206 static const int pxa2xx_cp_reg_map[0x10] = {
207 [0x0 ... 0xf] = -1,
208 [0x0] = ICIP,
209 [0x1] = ICMR,
210 [0x2] = ICLR,
211 [0x3] = ICFP,
212 [0x4] = ICPR,
213 [0x5] = ICHP,
214 [0x6] = ICIP2,
215 [0x7] = ICMR2,
216 [0x8] = ICLR2,
217 [0x9] = ICFP2,
218 [0xa] = ICPR2,
221 static uint64_t pxa2xx_pic_cp_read(CPUARMState *env, const ARMCPRegInfo *ri)
223 int offset = pxa2xx_cp_reg_map[ri->crn];
224 return pxa2xx_pic_mem_read(ri->opaque, offset, 4);
227 static void pxa2xx_pic_cp_write(CPUARMState *env, const ARMCPRegInfo *ri,
228 uint64_t value)
230 int offset = pxa2xx_cp_reg_map[ri->crn];
231 pxa2xx_pic_mem_write(ri->opaque, offset, value, 4);
234 #define REGINFO_FOR_PIC_CP(NAME, CRN) \
235 { .name = NAME, .cp = 6, .crn = CRN, .crm = 0, .opc1 = 0, .opc2 = 0, \
236 .access = PL1_RW, .type = ARM_CP_IO, \
237 .readfn = pxa2xx_pic_cp_read, .writefn = pxa2xx_pic_cp_write }
239 static const ARMCPRegInfo pxa_pic_cp_reginfo[] = {
240 REGINFO_FOR_PIC_CP("ICIP", 0),
241 REGINFO_FOR_PIC_CP("ICMR", 1),
242 REGINFO_FOR_PIC_CP("ICLR", 2),
243 REGINFO_FOR_PIC_CP("ICFP", 3),
244 REGINFO_FOR_PIC_CP("ICPR", 4),
245 REGINFO_FOR_PIC_CP("ICHP", 5),
246 REGINFO_FOR_PIC_CP("ICIP2", 6),
247 REGINFO_FOR_PIC_CP("ICMR2", 7),
248 REGINFO_FOR_PIC_CP("ICLR2", 8),
249 REGINFO_FOR_PIC_CP("ICFP2", 9),
250 REGINFO_FOR_PIC_CP("ICPR2", 0xa),
251 REGINFO_SENTINEL
254 static const MemoryRegionOps pxa2xx_pic_ops = {
255 .read = pxa2xx_pic_mem_read,
256 .write = pxa2xx_pic_mem_write,
257 .endianness = DEVICE_NATIVE_ENDIAN,
260 static int pxa2xx_pic_post_load(void *opaque, int version_id)
262 pxa2xx_pic_update(opaque);
263 return 0;
266 DeviceState *pxa2xx_pic_init(hwaddr base, ARMCPU *cpu)
268 DeviceState *dev = qdev_create(NULL, TYPE_PXA2XX_PIC);
269 PXA2xxPICState *s = PXA2XX_PIC(dev);
271 s->cpu = cpu;
273 s->int_pending[0] = 0;
274 s->int_pending[1] = 0;
275 s->int_enabled[0] = 0;
276 s->int_enabled[1] = 0;
277 s->is_fiq[0] = 0;
278 s->is_fiq[1] = 0;
280 qdev_init_nofail(dev);
282 qdev_init_gpio_in(dev, pxa2xx_pic_set_irq, PXA2XX_PIC_SRCS);
284 /* Enable IC memory-mapped registers access. */
285 memory_region_init_io(&s->iomem, OBJECT(s), &pxa2xx_pic_ops, s,
286 "pxa2xx-pic", 0x00100000);
287 sysbus_init_mmio(SYS_BUS_DEVICE(dev), &s->iomem);
288 sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, base);
290 /* Enable IC coprocessor access. */
291 define_arm_cp_regs_with_opaque(cpu, pxa_pic_cp_reginfo, s);
293 return dev;
296 static VMStateDescription vmstate_pxa2xx_pic_regs = {
297 .name = "pxa2xx_pic",
298 .version_id = 0,
299 .minimum_version_id = 0,
300 .post_load = pxa2xx_pic_post_load,
301 .fields = (VMStateField[]) {
302 VMSTATE_UINT32_ARRAY(int_enabled, PXA2xxPICState, 2),
303 VMSTATE_UINT32_ARRAY(int_pending, PXA2xxPICState, 2),
304 VMSTATE_UINT32_ARRAY(is_fiq, PXA2xxPICState, 2),
305 VMSTATE_UINT32(int_idle, PXA2xxPICState),
306 VMSTATE_UINT32_ARRAY(priority, PXA2xxPICState, PXA2XX_PIC_SRCS),
307 VMSTATE_END_OF_LIST(),
311 static int pxa2xx_pic_initfn(SysBusDevice *dev)
313 return 0;
316 static void pxa2xx_pic_class_init(ObjectClass *klass, void *data)
318 DeviceClass *dc = DEVICE_CLASS(klass);
319 SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
321 k->init = pxa2xx_pic_initfn;
322 dc->desc = "PXA2xx PIC";
323 dc->vmsd = &vmstate_pxa2xx_pic_regs;
326 static const TypeInfo pxa2xx_pic_info = {
327 .name = TYPE_PXA2XX_PIC,
328 .parent = TYPE_SYS_BUS_DEVICE,
329 .instance_size = sizeof(PXA2xxPICState),
330 .class_init = pxa2xx_pic_class_init,
333 static void pxa2xx_pic_register_types(void)
335 type_register_static(&pxa2xx_pic_info);
338 type_init(pxa2xx_pic_register_types)