/* * QEMU model of the IPI Inter Processor Interrupt block * * Copyright (c) 2014 Xilinx Inc. * * Written by Edgar E. Iglesias * Written by Alistair Francis * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ #include "qemu/osdep.h" #include "hw/sysbus.h" #include "migration/vmstate.h" #include "hw/register.h" #include "qemu/bitops.h" #include "qemu/log.h" #include "qemu/module.h" #include "hw/intc/xlnx-zynqmp-ipi.h" #include "hw/irq.h" #ifndef XLNX_ZYNQMP_IPI_ERR_DEBUG #define XLNX_ZYNQMP_IPI_ERR_DEBUG 0 #endif #define DB_PRINT_L(lvl, fmt, args...) do {\ if (XLNX_ZYNQMP_IPI_ERR_DEBUG >= lvl) {\ qemu_log(TYPE_XLNX_ZYNQMP_IPI ": %s:" fmt, __func__, ## args);\ } \ } while (0) #define DB_PRINT(fmt, args...) DB_PRINT_L(1, fmt, ## args) REG32(IPI_TRIG, 0x0) FIELD(IPI_TRIG, PL_3, 27, 1) FIELD(IPI_TRIG, PL_2, 26, 1) FIELD(IPI_TRIG, PL_1, 25, 1) FIELD(IPI_TRIG, PL_0, 24, 1) FIELD(IPI_TRIG, PMU_3, 19, 1) FIELD(IPI_TRIG, PMU_2, 18, 1) FIELD(IPI_TRIG, PMU_1, 17, 1) FIELD(IPI_TRIG, PMU_0, 16, 1) FIELD(IPI_TRIG, RPU_1, 9, 1) FIELD(IPI_TRIG, RPU_0, 8, 1) FIELD(IPI_TRIG, APU, 0, 1) REG32(IPI_OBS, 0x4) FIELD(IPI_OBS, PL_3, 27, 1) FIELD(IPI_OBS, PL_2, 26, 1) FIELD(IPI_OBS, PL_1, 25, 1) FIELD(IPI_OBS, PL_0, 24, 1) FIELD(IPI_OBS, PMU_3, 19, 1) FIELD(IPI_OBS, PMU_2, 18, 1) FIELD(IPI_OBS, PMU_1, 17, 1) FIELD(IPI_OBS, PMU_0, 16, 1) FIELD(IPI_OBS, RPU_1, 9, 1) FIELD(IPI_OBS, RPU_0, 8, 1) FIELD(IPI_OBS, APU, 0, 1) REG32(IPI_ISR, 0x10) FIELD(IPI_ISR, PL_3, 27, 1) FIELD(IPI_ISR, PL_2, 26, 1) FIELD(IPI_ISR, PL_1, 25, 1) FIELD(IPI_ISR, PL_0, 24, 1) FIELD(IPI_ISR, PMU_3, 19, 1) FIELD(IPI_ISR, PMU_2, 18, 1) FIELD(IPI_ISR, PMU_1, 17, 1) FIELD(IPI_ISR, PMU_0, 16, 1) FIELD(IPI_ISR, RPU_1, 9, 1) FIELD(IPI_ISR, RPU_0, 8, 1) FIELD(IPI_ISR, APU, 0, 1) REG32(IPI_IMR, 0x14) FIELD(IPI_IMR, PL_3, 27, 1) FIELD(IPI_IMR, PL_2, 26, 1) FIELD(IPI_IMR, PL_1, 25, 1) FIELD(IPI_IMR, PL_0, 24, 1) FIELD(IPI_IMR, PMU_3, 19, 1) FIELD(IPI_IMR, PMU_2, 18, 1) FIELD(IPI_IMR, PMU_1, 17, 1) FIELD(IPI_IMR, PMU_0, 16, 1) FIELD(IPI_IMR, RPU_1, 9, 1) FIELD(IPI_IMR, RPU_0, 8, 1) FIELD(IPI_IMR, APU, 0, 1) REG32(IPI_IER, 0x18) FIELD(IPI_IER, PL_3, 27, 1) FIELD(IPI_IER, PL_2, 26, 1) FIELD(IPI_IER, PL_1, 25, 1) FIELD(IPI_IER, PL_0, 24, 1) FIELD(IPI_IER, PMU_3, 19, 1) FIELD(IPI_IER, PMU_2, 18, 1) FIELD(IPI_IER, PMU_1, 17, 1) FIELD(IPI_IER, PMU_0, 16, 1) FIELD(IPI_IER, RPU_1, 9, 1) FIELD(IPI_IER, RPU_0, 8, 1) FIELD(IPI_IER, APU, 0, 1) REG32(IPI_IDR, 0x1c) FIELD(IPI_IDR, PL_3, 27, 1) FIELD(IPI_IDR, PL_2, 26, 1) FIELD(IPI_IDR, PL_1, 25, 1) FIELD(IPI_IDR, PL_0, 24, 1) FIELD(IPI_IDR, PMU_3, 19, 1) FIELD(IPI_IDR, PMU_2, 18, 1) FIELD(IPI_IDR, PMU_1, 17, 1) FIELD(IPI_IDR, PMU_0, 16, 1) FIELD(IPI_IDR, RPU_1, 9, 1) FIELD(IPI_IDR, RPU_0, 8, 1) FIELD(IPI_IDR, APU, 0, 1) /* APU * RPU_0 * RPU_1 * PMU_0 * PMU_1 * PMU_2 * PMU_3 * PL_0 * PL_1 * PL_2 * PL_3 */ int index_array[NUM_IPIS] = {0, 8, 9, 16, 17, 18, 19, 24, 25, 26, 27}; static const char *index_array_names[NUM_IPIS] = {"APU", "RPU_0", "RPU_1", "PMU_0", "PMU_1", "PMU_2", "PMU_3", "PL_0", "PL_1", "PL_2", "PL_3"}; static void xlnx_zynqmp_ipi_set_trig(XlnxZynqMPIPI *s, uint32_t val) { int i, ipi_index, ipi_mask; for (i = 0; i < NUM_IPIS; i++) { ipi_index = index_array[i]; ipi_mask = (1 << ipi_index); DB_PRINT("Setting %s=%d\n", index_array_names[i], !!(val & ipi_mask)); qemu_set_irq(s->irq_trig_out[i], !!(val & ipi_mask)); } } static void xlnx_zynqmp_ipi_set_obs(XlnxZynqMPIPI *s, uint32_t val) { int i, ipi_index, ipi_mask; for (i = 0; i < NUM_IPIS; i++) { ipi_index = index_array[i]; ipi_mask = (1 << ipi_index); DB_PRINT("Setting %s=%d\n", index_array_names[i], !!(val & ipi_mask)); qemu_set_irq(s->irq_obs_out[i], !!(val & ipi_mask)); } } static void xlnx_zynqmp_ipi_update_irq(XlnxZynqMPIPI *s) { bool pending = s->regs[R_IPI_ISR] & ~s->regs[R_IPI_IMR]; DB_PRINT("irq=%d isr=%x mask=%x\n", pending, s->regs[R_IPI_ISR], s->regs[R_IPI_IMR]); qemu_set_irq(s->irq, pending); } static uint64_t xlnx_zynqmp_ipi_trig_prew(RegisterInfo *reg, uint64_t val64) { XlnxZynqMPIPI *s = XLNX_ZYNQMP_IPI(reg->opaque); xlnx_zynqmp_ipi_set_trig(s, val64); return val64; } static void xlnx_zynqmp_ipi_trig_postw(RegisterInfo *reg, uint64_t val64) { XlnxZynqMPIPI *s = XLNX_ZYNQMP_IPI(reg->opaque); /* TRIG generates a pulse on the outbound signals. We use the * post-write callback to bring the signal back-down. */ s->regs[R_IPI_TRIG] = 0; xlnx_zynqmp_ipi_set_trig(s, 0); } static uint64_t xlnx_zynqmp_ipi_isr_prew(RegisterInfo *reg, uint64_t val64) { XlnxZynqMPIPI *s = XLNX_ZYNQMP_IPI(reg->opaque); xlnx_zynqmp_ipi_set_obs(s, val64); return val64; } static void xlnx_zynqmp_ipi_isr_postw(RegisterInfo *reg, uint64_t val64) { XlnxZynqMPIPI *s = XLNX_ZYNQMP_IPI(reg->opaque); xlnx_zynqmp_ipi_update_irq(s); } static uint64_t xlnx_zynqmp_ipi_ier_prew(RegisterInfo *reg, uint64_t val64) { XlnxZynqMPIPI *s = XLNX_ZYNQMP_IPI(reg->opaque); uint32_t val = val64; s->regs[R_IPI_IMR] &= ~val; xlnx_zynqmp_ipi_update_irq(s); return 0; } static uint64_t xlnx_zynqmp_ipi_idr_prew(RegisterInfo *reg, uint64_t val64) { XlnxZynqMPIPI *s = XLNX_ZYNQMP_IPI(reg->opaque); uint32_t val = val64; s->regs[R_IPI_IMR] |= val; xlnx_zynqmp_ipi_update_irq(s); return 0; } static const RegisterAccessInfo xlnx_zynqmp_ipi_regs_info[] = { { .name = "IPI_TRIG", .addr = A_IPI_TRIG, .rsvd = 0xf0f0fcfe, .ro = 0xf0f0fcfe, .pre_write = xlnx_zynqmp_ipi_trig_prew, .post_write = xlnx_zynqmp_ipi_trig_postw, },{ .name = "IPI_OBS", .addr = A_IPI_OBS, .rsvd = 0xf0f0fcfe, .ro = 0xffffffff, },{ .name = "IPI_ISR", .addr = A_IPI_ISR, .rsvd = 0xf0f0fcfe, .ro = 0xf0f0fcfe, .w1c = 0xf0f0301, .pre_write = xlnx_zynqmp_ipi_isr_prew, .post_write = xlnx_zynqmp_ipi_isr_postw, },{ .name = "IPI_IMR", .addr = A_IPI_IMR, .reset = 0xf0f0301, .rsvd = 0xf0f0fcfe, .ro = 0xffffffff, },{ .name = "IPI_IER", .addr = A_IPI_IER, .rsvd = 0xf0f0fcfe, .ro = 0xf0f0fcfe, .pre_write = xlnx_zynqmp_ipi_ier_prew, },{ .name = "IPI_IDR", .addr = A_IPI_IDR, .rsvd = 0xf0f0fcfe, .ro = 0xf0f0fcfe, .pre_write = xlnx_zynqmp_ipi_idr_prew, } }; static void xlnx_zynqmp_ipi_reset(DeviceState *dev) { XlnxZynqMPIPI *s = XLNX_ZYNQMP_IPI(dev); int i; for (i = 0; i < ARRAY_SIZE(s->regs_info); ++i) { register_reset(&s->regs_info[i]); } xlnx_zynqmp_ipi_update_irq(s); } static void xlnx_zynqmp_ipi_handler(void *opaque, int n, int level) { XlnxZynqMPIPI *s = XLNX_ZYNQMP_IPI(opaque); uint32_t val = (!!level) << n; DB_PRINT("IPI input irq[%d]=%d\n", n, level); s->regs[R_IPI_ISR] |= val; xlnx_zynqmp_ipi_set_obs(s, s->regs[R_IPI_ISR]); xlnx_zynqmp_ipi_update_irq(s); } static void xlnx_zynqmp_obs_handler(void *opaque, int n, int level) { XlnxZynqMPIPI *s = XLNX_ZYNQMP_IPI(opaque); DB_PRINT("OBS input irq[%d]=%d\n", n, level); s->regs[R_IPI_OBS] &= ~(1ULL << n); s->regs[R_IPI_OBS] |= (level << n); } static const MemoryRegionOps xlnx_zynqmp_ipi_ops = { .read = register_read_memory, .write = register_write_memory, .endianness = DEVICE_LITTLE_ENDIAN, .valid = { .min_access_size = 4, .max_access_size = 4, }, }; static void xlnx_zynqmp_ipi_realize(DeviceState *dev, Error **errp) { qdev_init_gpio_in_named(dev, xlnx_zynqmp_ipi_handler, "IPI_INPUTS", 32); qdev_init_gpio_in_named(dev, xlnx_zynqmp_obs_handler, "OBS_INPUTS", 32); } static void xlnx_zynqmp_ipi_init(Object *obj) { XlnxZynqMPIPI *s = XLNX_ZYNQMP_IPI(obj); DeviceState *dev = DEVICE(obj); SysBusDevice *sbd = SYS_BUS_DEVICE(obj); RegisterInfoArray *reg_array; char *irq_name; int i; memory_region_init(&s->iomem, obj, TYPE_XLNX_ZYNQMP_IPI, R_XLNX_ZYNQMP_IPI_MAX * 4); reg_array = register_init_block32(DEVICE(obj), xlnx_zynqmp_ipi_regs_info, ARRAY_SIZE(xlnx_zynqmp_ipi_regs_info), s->regs_info, s->regs, &xlnx_zynqmp_ipi_ops, XLNX_ZYNQMP_IPI_ERR_DEBUG, R_XLNX_ZYNQMP_IPI_MAX * 4); memory_region_add_subregion(&s->iomem, 0x0, ®_array->mem); sysbus_init_mmio(sbd, &s->iomem); sysbus_init_irq(sbd, &s->irq); for (i = 0; i < NUM_IPIS; i++) { qdev_init_gpio_out_named(dev, &s->irq_trig_out[i], index_array_names[i], 1); irq_name = g_strdup_printf("OBS_%s", index_array_names[i]); qdev_init_gpio_out_named(dev, &s->irq_obs_out[i], irq_name, 1); g_free(irq_name); } } static const VMStateDescription vmstate_zynqmp_pmu_ipi = { .name = TYPE_XLNX_ZYNQMP_IPI, .version_id = 1, .minimum_version_id = 1, .fields = (const VMStateField[]) { VMSTATE_UINT32_ARRAY(regs, XlnxZynqMPIPI, R_XLNX_ZYNQMP_IPI_MAX), VMSTATE_END_OF_LIST(), } }; static void xlnx_zynqmp_ipi_class_init(ObjectClass *klass, void *data) { DeviceClass *dc = DEVICE_CLASS(klass); device_class_set_legacy_reset(dc, xlnx_zynqmp_ipi_reset); dc->realize = xlnx_zynqmp_ipi_realize; dc->vmsd = &vmstate_zynqmp_pmu_ipi; } static const TypeInfo xlnx_zynqmp_ipi_info = { .name = TYPE_XLNX_ZYNQMP_IPI, .parent = TYPE_SYS_BUS_DEVICE, .instance_size = sizeof(XlnxZynqMPIPI), .class_init = xlnx_zynqmp_ipi_class_init, .instance_init = xlnx_zynqmp_ipi_init, }; static void xlnx_zynqmp_ipi_register_types(void) { type_register_static(&xlnx_zynqmp_ipi_info); } type_init(xlnx_zynqmp_ipi_register_types)