--- /dev/null
+/*
+ * Intel XScale PXA Programmable Interrupt Controller.
+ *
+ * Copyright (c) 2006 Openedhand Ltd.
+ * Copyright (c) 2006 Thorsten Zitterell
+ * Written by Andrzej Zaborowski <balrog@zabor.org>
+ *
+ * This code is licensed under the GPL.
+ */
+
+#include "hw/hw.h"
+#include "hw/arm/pxa.h"
+#include "hw/sysbus.h"
+
+#define ICIP 0x00 /* Interrupt Controller IRQ Pending register */
+#define ICMR 0x04 /* Interrupt Controller Mask register */
+#define ICLR 0x08 /* Interrupt Controller Level register */
+#define ICFP 0x0c /* Interrupt Controller FIQ Pending register */
+#define ICPR 0x10 /* Interrupt Controller Pending register */
+#define ICCR 0x14 /* Interrupt Controller Control register */
+#define ICHP 0x18 /* Interrupt Controller Highest Priority register */
+#define IPR0 0x1c /* Interrupt Controller Priority register 0 */
+#define IPR31 0x98 /* Interrupt Controller Priority register 31 */
+#define ICIP2 0x9c /* Interrupt Controller IRQ Pending register 2 */
+#define ICMR2 0xa0 /* Interrupt Controller Mask register 2 */
+#define ICLR2 0xa4 /* Interrupt Controller Level register 2 */
+#define ICFP2 0xa8 /* Interrupt Controller FIQ Pending register 2 */
+#define ICPR2 0xac /* Interrupt Controller Pending register 2 */
+#define IPR32 0xb0 /* Interrupt Controller Priority register 32 */
+#define IPR39 0xcc /* Interrupt Controller Priority register 39 */
+
+#define PXA2XX_PIC_SRCS 40
+
+#define TYPE_PXA2XX_PIC "pxa2xx_pic"
+#define PXA2XX_PIC(obj) \
+ OBJECT_CHECK(PXA2xxPICState, (obj), TYPE_PXA2XX_PIC)
+
+typedef struct {
+ /*< private >*/
+ SysBusDevice parent_obj;
+ /*< public >*/
+
+ MemoryRegion iomem;
+ ARMCPU *cpu;
+ uint32_t int_enabled[2];
+ uint32_t int_pending[2];
+ uint32_t is_fiq[2];
+ uint32_t int_idle;
+ uint32_t priority[PXA2XX_PIC_SRCS];
+} PXA2xxPICState;
+
+static void pxa2xx_pic_update(void *opaque)
+{
+ uint32_t mask[2];
+ PXA2xxPICState *s = (PXA2xxPICState *) opaque;
+ CPUState *cpu = CPU(s->cpu);
+
+ if (cpu->halted) {
+ mask[0] = s->int_pending[0] & (s->int_enabled[0] | s->int_idle);
+ mask[1] = s->int_pending[1] & (s->int_enabled[1] | s->int_idle);
+ if (mask[0] || mask[1]) {
+ cpu_interrupt(cpu, CPU_INTERRUPT_EXITTB);
+ }
+ }
+
+ mask[0] = s->int_pending[0] & s->int_enabled[0];
+ mask[1] = s->int_pending[1] & s->int_enabled[1];
+
+ if ((mask[0] & s->is_fiq[0]) || (mask[1] & s->is_fiq[1])) {
+ cpu_interrupt(cpu, CPU_INTERRUPT_FIQ);
+ } else {
+ cpu_reset_interrupt(cpu, CPU_INTERRUPT_FIQ);
+ }
+
+ if ((mask[0] & ~s->is_fiq[0]) || (mask[1] & ~s->is_fiq[1])) {
+ cpu_interrupt(cpu, CPU_INTERRUPT_HARD);
+ } else {
+ cpu_reset_interrupt(cpu, CPU_INTERRUPT_HARD);
+ }
+}
+
+/* Note: Here level means state of the signal on a pin, not
+ * IRQ/FIQ distinction as in PXA Developer Manual. */
+static void pxa2xx_pic_set_irq(void *opaque, int irq, int level)
+{
+ PXA2xxPICState *s = (PXA2xxPICState *) opaque;
+ int int_set = (irq >= 32);
+ irq &= 31;
+
+ if (level)
+ s->int_pending[int_set] |= 1 << irq;
+ else
+ s->int_pending[int_set] &= ~(1 << irq);
+
+ pxa2xx_pic_update(opaque);
+}
+
+static inline uint32_t pxa2xx_pic_highest(PXA2xxPICState *s) {
+ int i, int_set, irq;
+ uint32_t bit, mask[2];
+ uint32_t ichp = 0x003f003f; /* Both IDs invalid */
+
+ mask[0] = s->int_pending[0] & s->int_enabled[0];
+ mask[1] = s->int_pending[1] & s->int_enabled[1];
+
+ for (i = PXA2XX_PIC_SRCS - 1; i >= 0; i --) {
+ irq = s->priority[i] & 0x3f;
+ if ((s->priority[i] & (1U << 31)) && irq < PXA2XX_PIC_SRCS) {
+ /* Source peripheral ID is valid. */
+ bit = 1 << (irq & 31);
+ int_set = (irq >= 32);
+
+ if (mask[int_set] & bit & s->is_fiq[int_set]) {
+ /* FIQ asserted */
+ ichp &= 0xffff0000;
+ ichp |= (1 << 15) | irq;
+ }
+
+ if (mask[int_set] & bit & ~s->is_fiq[int_set]) {
+ /* IRQ asserted */
+ ichp &= 0x0000ffff;
+ ichp |= (1U << 31) | (irq << 16);
+ }
+ }
+ }
+
+ return ichp;
+}
+
+static uint64_t pxa2xx_pic_mem_read(void *opaque, hwaddr offset,
+ unsigned size)
+{
+ PXA2xxPICState *s = (PXA2xxPICState *) opaque;
+
+ switch (offset) {
+ case ICIP: /* IRQ Pending register */
+ return s->int_pending[0] & ~s->is_fiq[0] & s->int_enabled[0];
+ case ICIP2: /* IRQ Pending register 2 */
+ return s->int_pending[1] & ~s->is_fiq[1] & s->int_enabled[1];
+ case ICMR: /* Mask register */
+ return s->int_enabled[0];
+ case ICMR2: /* Mask register 2 */
+ return s->int_enabled[1];
+ case ICLR: /* Level register */
+ return s->is_fiq[0];
+ case ICLR2: /* Level register 2 */
+ return s->is_fiq[1];
+ case ICCR: /* Idle mask */
+ return (s->int_idle == 0);
+ case ICFP: /* FIQ Pending register */
+ return s->int_pending[0] & s->is_fiq[0] & s->int_enabled[0];
+ case ICFP2: /* FIQ Pending register 2 */
+ return s->int_pending[1] & s->is_fiq[1] & s->int_enabled[1];
+ case ICPR: /* Pending register */
+ return s->int_pending[0];
+ case ICPR2: /* Pending register 2 */
+ return s->int_pending[1];
+ case IPR0 ... IPR31:
+ return s->priority[0 + ((offset - IPR0 ) >> 2)];
+ case IPR32 ... IPR39:
+ return s->priority[32 + ((offset - IPR32) >> 2)];
+ case ICHP: /* Highest Priority register */
+ return pxa2xx_pic_highest(s);
+ default:
+ printf("%s: Bad register offset " REG_FMT "\n", __FUNCTION__, offset);
+ return 0;
+ }
+}
+
+static void pxa2xx_pic_mem_write(void *opaque, hwaddr offset,
+ uint64_t value, unsigned size)
+{
+ PXA2xxPICState *s = (PXA2xxPICState *) opaque;
+
+ switch (offset) {
+ case ICMR: /* Mask register */
+ s->int_enabled[0] = value;
+ break;
+ case ICMR2: /* Mask register 2 */
+ s->int_enabled[1] = value;
+ break;
+ case ICLR: /* Level register */
+ s->is_fiq[0] = value;
+ break;
+ case ICLR2: /* Level register 2 */
+ s->is_fiq[1] = value;
+ break;
+ case ICCR: /* Idle mask */
+ s->int_idle = (value & 1) ? 0 : ~0;
+ break;
+ case IPR0 ... IPR31:
+ s->priority[0 + ((offset - IPR0 ) >> 2)] = value & 0x8000003f;
+ break;
+ case IPR32 ... IPR39:
+ s->priority[32 + ((offset - IPR32) >> 2)] = value & 0x8000003f;
+ break;
+ default:
+ printf("%s: Bad register offset " REG_FMT "\n", __FUNCTION__, offset);
+ return;
+ }
+ pxa2xx_pic_update(opaque);
+}
+
+/* Interrupt Controller Coprocessor Space Register Mapping */
+static const int pxa2xx_cp_reg_map[0x10] = {
+ [0x0 ... 0xf] = -1,
+ [0x0] = ICIP,
+ [0x1] = ICMR,
+ [0x2] = ICLR,
+ [0x3] = ICFP,
+ [0x4] = ICPR,
+ [0x5] = ICHP,
+ [0x6] = ICIP2,
+ [0x7] = ICMR2,
+ [0x8] = ICLR2,
+ [0x9] = ICFP2,
+ [0xa] = ICPR2,
+};
+
+static uint64_t pxa2xx_pic_cp_read(CPUARMState *env, const ARMCPRegInfo *ri)
+{
+ int offset = pxa2xx_cp_reg_map[ri->crn];
+ return pxa2xx_pic_mem_read(ri->opaque, offset, 4);
+}
+
+static void pxa2xx_pic_cp_write(CPUARMState *env, const ARMCPRegInfo *ri,
+ uint64_t value)
+{
+ int offset = pxa2xx_cp_reg_map[ri->crn];
+ pxa2xx_pic_mem_write(ri->opaque, offset, value, 4);
+}
+
+#define REGINFO_FOR_PIC_CP(NAME, CRN) \
+ { .name = NAME, .cp = 6, .crn = CRN, .crm = 0, .opc1 = 0, .opc2 = 0, \
+ .access = PL1_RW, .type = ARM_CP_IO, \
+ .readfn = pxa2xx_pic_cp_read, .writefn = pxa2xx_pic_cp_write }
+
+static const ARMCPRegInfo pxa_pic_cp_reginfo[] = {
+ REGINFO_FOR_PIC_CP("ICIP", 0),
+ REGINFO_FOR_PIC_CP("ICMR", 1),
+ REGINFO_FOR_PIC_CP("ICLR", 2),
+ REGINFO_FOR_PIC_CP("ICFP", 3),
+ REGINFO_FOR_PIC_CP("ICPR", 4),
+ REGINFO_FOR_PIC_CP("ICHP", 5),
+ REGINFO_FOR_PIC_CP("ICIP2", 6),
+ REGINFO_FOR_PIC_CP("ICMR2", 7),
+ REGINFO_FOR_PIC_CP("ICLR2", 8),
+ REGINFO_FOR_PIC_CP("ICFP2", 9),
+ REGINFO_FOR_PIC_CP("ICPR2", 0xa),
+ REGINFO_SENTINEL
+};
+
+static const MemoryRegionOps pxa2xx_pic_ops = {
+ .read = pxa2xx_pic_mem_read,
+ .write = pxa2xx_pic_mem_write,
+ .endianness = DEVICE_NATIVE_ENDIAN,
+};
+
+static int pxa2xx_pic_post_load(void *opaque, int version_id)
+{
+ pxa2xx_pic_update(opaque);
+ return 0;
+}
+
+DeviceState *pxa2xx_pic_init(hwaddr base, ARMCPU *cpu)
+{
+ DeviceState *dev = qdev_create(NULL, TYPE_PXA2XX_PIC);
+ PXA2xxPICState *s = PXA2XX_PIC(dev);
+
+ s->cpu = cpu;
+
+ s->int_pending[0] = 0;
+ s->int_pending[1] = 0;
+ s->int_enabled[0] = 0;
+ s->int_enabled[1] = 0;
+ s->is_fiq[0] = 0;
+ s->is_fiq[1] = 0;
+
+ qdev_init_nofail(dev);
+
+ qdev_init_gpio_in(dev, pxa2xx_pic_set_irq, PXA2XX_PIC_SRCS);
+
+ /* Enable IC memory-mapped registers access. */
+ memory_region_init_io(&s->iomem, OBJECT(s), &pxa2xx_pic_ops, s,
+ "pxa2xx-pic", 0x00100000);
+ sysbus_init_mmio(SYS_BUS_DEVICE(dev), &s->iomem);
+ sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, base);
+
+ /* Enable IC coprocessor access. */
+ define_arm_cp_regs_with_opaque(cpu, pxa_pic_cp_reginfo, s);
+
+ return dev;
+}
+
+static VMStateDescription vmstate_pxa2xx_pic_regs = {
+ .name = "pxa2xx_pic",
+ .version_id = 0,
+ .minimum_version_id = 0,
+ .post_load = pxa2xx_pic_post_load,
+ .fields = (VMStateField[]) {
+ VMSTATE_UINT32_ARRAY(int_enabled, PXA2xxPICState, 2),
+ VMSTATE_UINT32_ARRAY(int_pending, PXA2xxPICState, 2),
+ VMSTATE_UINT32_ARRAY(is_fiq, PXA2xxPICState, 2),
+ VMSTATE_UINT32(int_idle, PXA2xxPICState),
+ VMSTATE_UINT32_ARRAY(priority, PXA2xxPICState, PXA2XX_PIC_SRCS),
+ VMSTATE_END_OF_LIST(),
+ },
+};
+
+static int pxa2xx_pic_initfn(SysBusDevice *dev)
+{
+ return 0;
+}
+
+static void pxa2xx_pic_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
+
+ k->init = pxa2xx_pic_initfn;
+ dc->desc = "PXA2xx PIC";
+ dc->vmsd = &vmstate_pxa2xx_pic_regs;
+}
+
+static const TypeInfo pxa2xx_pic_info = {
+ .name = TYPE_PXA2XX_PIC,
+ .parent = TYPE_SYS_BUS_DEVICE,
+ .instance_size = sizeof(PXA2xxPICState),
+ .class_init = pxa2xx_pic_class_init,
+};
+
+static void pxa2xx_pic_register_types(void)
+{
+ type_register_static(&pxa2xx_pic_info);
+}
+
+type_init(pxa2xx_pic_register_types)
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