/* * Samsung exynos4210 GIC implementation. Based on hw/arm_gic.c * * Copyright (c) 2000 - 2011 Samsung Electronics Co., Ltd. * All rights reserved. * * Evgeny Voevodin <e.voevodin@samsung.com> * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2 of the License, or (at your * option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. * See the GNU General Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, see <http://www.gnu.org/licenses/>. */ #include "qemu/osdep.h" #include "hw/sysbus.h" #include "migration/vmstate.h" #include "qapi/error.h" #include "qemu/module.h" #include "hw/irq.h" #include "hw/qdev-properties.h" #include "hw/arm/exynos4210.h" enum ExtGicId { EXT_GIC_ID_MDMA_LCD0 = 66, EXT_GIC_ID_PDMA0, EXT_GIC_ID_PDMA1, EXT_GIC_ID_TIMER0, EXT_GIC_ID_TIMER1, EXT_GIC_ID_TIMER2, EXT_GIC_ID_TIMER3, EXT_GIC_ID_TIMER4, EXT_GIC_ID_MCT_L0, EXT_GIC_ID_WDT, EXT_GIC_ID_RTC_ALARM, EXT_GIC_ID_RTC_TIC, EXT_GIC_ID_GPIO_XB, EXT_GIC_ID_GPIO_XA, EXT_GIC_ID_MCT_L1, EXT_GIC_ID_IEM_APC, EXT_GIC_ID_IEM_IEC, EXT_GIC_ID_NFC, EXT_GIC_ID_UART0, EXT_GIC_ID_UART1, EXT_GIC_ID_UART2, EXT_GIC_ID_UART3, EXT_GIC_ID_UART4, EXT_GIC_ID_MCT_G0, EXT_GIC_ID_I2C0, EXT_GIC_ID_I2C1, EXT_GIC_ID_I2C2, EXT_GIC_ID_I2C3, EXT_GIC_ID_I2C4, EXT_GIC_ID_I2C5, EXT_GIC_ID_I2C6, EXT_GIC_ID_I2C7, EXT_GIC_ID_SPI0, EXT_GIC_ID_SPI1, EXT_GIC_ID_SPI2, EXT_GIC_ID_MCT_G1, EXT_GIC_ID_USB_HOST, EXT_GIC_ID_USB_DEVICE, EXT_GIC_ID_MODEMIF, EXT_GIC_ID_HSMMC0, EXT_GIC_ID_HSMMC1, EXT_GIC_ID_HSMMC2, EXT_GIC_ID_HSMMC3, EXT_GIC_ID_SDMMC, EXT_GIC_ID_MIPI_CSI_4LANE, EXT_GIC_ID_MIPI_DSI_4LANE, EXT_GIC_ID_MIPI_CSI_2LANE, EXT_GIC_ID_MIPI_DSI_2LANE, EXT_GIC_ID_ONENAND_AUDI, EXT_GIC_ID_ROTATOR, EXT_GIC_ID_FIMC0, EXT_GIC_ID_FIMC1, EXT_GIC_ID_FIMC2, EXT_GIC_ID_FIMC3, EXT_GIC_ID_JPEG, EXT_GIC_ID_2D, EXT_GIC_ID_PCIe, EXT_GIC_ID_MIXER, EXT_GIC_ID_HDMI, EXT_GIC_ID_HDMI_I2C, EXT_GIC_ID_MFC, EXT_GIC_ID_TVENC, }; enum ExtInt { EXT_GIC_ID_EXTINT0 = 48, EXT_GIC_ID_EXTINT1, EXT_GIC_ID_EXTINT2, EXT_GIC_ID_EXTINT3, EXT_GIC_ID_EXTINT4, EXT_GIC_ID_EXTINT5, EXT_GIC_ID_EXTINT6, EXT_GIC_ID_EXTINT7, EXT_GIC_ID_EXTINT8, EXT_GIC_ID_EXTINT9, EXT_GIC_ID_EXTINT10, EXT_GIC_ID_EXTINT11, EXT_GIC_ID_EXTINT12, EXT_GIC_ID_EXTINT13, EXT_GIC_ID_EXTINT14, EXT_GIC_ID_EXTINT15 }; /* * External GIC sources which are not from External Interrupt Combiner or * External Interrupts are starting from EXYNOS4210_MAX_EXT_COMBINER_OUT_IRQ, * which is INTG16 in Internal Interrupt Combiner. */ static const uint32_t combiner_grp_to_gic_id[64-EXYNOS4210_MAX_EXT_COMBINER_OUT_IRQ][8] = { /* int combiner groups 16-19 */ { }, { }, { }, { }, /* int combiner group 20 */ { 0, EXT_GIC_ID_MDMA_LCD0 }, /* int combiner group 21 */ { EXT_GIC_ID_PDMA0, EXT_GIC_ID_PDMA1 }, /* int combiner group 22 */ { EXT_GIC_ID_TIMER0, EXT_GIC_ID_TIMER1, EXT_GIC_ID_TIMER2, EXT_GIC_ID_TIMER3, EXT_GIC_ID_TIMER4 }, /* int combiner group 23 */ { EXT_GIC_ID_RTC_ALARM, EXT_GIC_ID_RTC_TIC }, /* int combiner group 24 */ { EXT_GIC_ID_GPIO_XB, EXT_GIC_ID_GPIO_XA }, /* int combiner group 25 */ { EXT_GIC_ID_IEM_APC, EXT_GIC_ID_IEM_IEC }, /* int combiner group 26 */ { EXT_GIC_ID_UART0, EXT_GIC_ID_UART1, EXT_GIC_ID_UART2, EXT_GIC_ID_UART3, EXT_GIC_ID_UART4 }, /* int combiner group 27 */ { EXT_GIC_ID_I2C0, EXT_GIC_ID_I2C1, EXT_GIC_ID_I2C2, EXT_GIC_ID_I2C3, EXT_GIC_ID_I2C4, EXT_GIC_ID_I2C5, EXT_GIC_ID_I2C6, EXT_GIC_ID_I2C7 }, /* int combiner group 28 */ { EXT_GIC_ID_SPI0, EXT_GIC_ID_SPI1, EXT_GIC_ID_SPI2 , EXT_GIC_ID_USB_HOST}, /* int combiner group 29 */ { EXT_GIC_ID_HSMMC0, EXT_GIC_ID_HSMMC1, EXT_GIC_ID_HSMMC2, EXT_GIC_ID_HSMMC3, EXT_GIC_ID_SDMMC }, /* int combiner group 30 */ { EXT_GIC_ID_MIPI_CSI_4LANE, EXT_GIC_ID_MIPI_CSI_2LANE }, /* int combiner group 31 */ { EXT_GIC_ID_MIPI_DSI_4LANE, EXT_GIC_ID_MIPI_DSI_2LANE }, /* int combiner group 32 */ { EXT_GIC_ID_FIMC0, EXT_GIC_ID_FIMC1 }, /* int combiner group 33 */ { EXT_GIC_ID_FIMC2, EXT_GIC_ID_FIMC3 }, /* int combiner group 34 */ { EXT_GIC_ID_ONENAND_AUDI, EXT_GIC_ID_NFC }, /* int combiner group 35 */ { 0, 0, 0, EXT_GIC_ID_MCT_L1, EXT_GIC_ID_MCT_G0, EXT_GIC_ID_MCT_G1 }, /* int combiner group 36 */ { EXT_GIC_ID_MIXER }, /* int combiner group 37 */ { EXT_GIC_ID_EXTINT4, EXT_GIC_ID_EXTINT5, EXT_GIC_ID_EXTINT6, EXT_GIC_ID_EXTINT7 }, /* groups 38-50 */ { }, { }, { }, { }, { }, { }, { }, { }, { }, { }, { }, { }, { }, /* int combiner group 51 */ { EXT_GIC_ID_MCT_L0, 0, 0, 0, EXT_GIC_ID_MCT_G0, EXT_GIC_ID_MCT_G1 }, /* group 52 */ { }, /* int combiner group 53 */ { EXT_GIC_ID_WDT, 0, 0, 0, EXT_GIC_ID_MCT_G0, EXT_GIC_ID_MCT_G1 }, /* groups 54-63 */ { }, { }, { }, { }, { }, { }, { }, { }, { }, { } }; #define EXYNOS4210_GIC_NIRQ 160 #define EXYNOS4210_EXT_GIC_CPU_REGION_SIZE 0x10000 #define EXYNOS4210_EXT_GIC_DIST_REGION_SIZE 0x10000 #define EXYNOS4210_EXT_GIC_PER_CPU_OFFSET 0x8000 #define EXYNOS4210_EXT_GIC_CPU_GET_OFFSET(n) \ ((n) * EXYNOS4210_EXT_GIC_PER_CPU_OFFSET) #define EXYNOS4210_EXT_GIC_DIST_GET_OFFSET(n) \ ((n) * EXYNOS4210_EXT_GIC_PER_CPU_OFFSET) #define EXYNOS4210_GIC_CPU_REGION_SIZE 0x100 #define EXYNOS4210_GIC_DIST_REGION_SIZE 0x1000 static void exynos4210_irq_handler(void *opaque, int irq, int level) { Exynos4210Irq *s = (Exynos4210Irq *)opaque; /* Bypass */ qemu_set_irq(s->board_irqs[irq], level); } /* * Initialize exynos4210 IRQ subsystem stub. */ qemu_irq *exynos4210_init_irq(Exynos4210Irq *s) { return qemu_allocate_irqs(exynos4210_irq_handler, s, EXYNOS4210_MAX_INT_COMBINER_IN_IRQ); } /* * Initialize board IRQs. * These IRQs contain splitted Int/External Combiner and External Gic IRQs. */ void exynos4210_init_board_irqs(Exynos4210Irq *s) { uint32_t grp, bit, irq_id, n; for (n = 0; n < EXYNOS4210_MAX_EXT_COMBINER_IN_IRQ; n++) { irq_id = 0; if (n == EXYNOS4210_COMBINER_GET_IRQ_NUM(1, 4) || n == EXYNOS4210_COMBINER_GET_IRQ_NUM(12, 4)) { /* MCT_G0 is passed to External GIC */ irq_id = EXT_GIC_ID_MCT_G0; } if (n == EXYNOS4210_COMBINER_GET_IRQ_NUM(1, 5) || n == EXYNOS4210_COMBINER_GET_IRQ_NUM(12, 5)) { /* MCT_G1 is passed to External and GIC */ irq_id = EXT_GIC_ID_MCT_G1; } if (irq_id) { s->board_irqs[n] = qemu_irq_split(s->int_combiner_irq[n], s->ext_gic_irq[irq_id-32]); } else { s->board_irqs[n] = qemu_irq_split(s->int_combiner_irq[n], s->ext_combiner_irq[n]); } } for (; n < EXYNOS4210_MAX_INT_COMBINER_IN_IRQ; n++) { /* these IDs are passed to Internal Combiner and External GIC */ grp = EXYNOS4210_COMBINER_GET_GRP_NUM(n); bit = EXYNOS4210_COMBINER_GET_BIT_NUM(n); irq_id = combiner_grp_to_gic_id[grp - EXYNOS4210_MAX_EXT_COMBINER_OUT_IRQ][bit]; if (irq_id) { s->board_irqs[n] = qemu_irq_split(s->int_combiner_irq[n], s->ext_gic_irq[irq_id-32]); } } } /* * Get IRQ number from exynos4210 IRQ subsystem stub. * To identify IRQ source use internal combiner group and bit number * grp - group number * bit - bit number inside group */ uint32_t exynos4210_get_irq(uint32_t grp, uint32_t bit) { return EXYNOS4210_COMBINER_GET_IRQ_NUM(grp, bit); } /********* GIC part *********/ #define TYPE_EXYNOS4210_GIC "exynos4210.gic" #define EXYNOS4210_GIC(obj) \ OBJECT_CHECK(Exynos4210GicState, (obj), TYPE_EXYNOS4210_GIC) typedef struct { SysBusDevice parent_obj; MemoryRegion cpu_container; MemoryRegion dist_container; MemoryRegion cpu_alias[EXYNOS4210_NCPUS]; MemoryRegion dist_alias[EXYNOS4210_NCPUS]; uint32_t num_cpu; DeviceState *gic; } Exynos4210GicState; static void exynos4210_gic_set_irq(void *opaque, int irq, int level) { Exynos4210GicState *s = (Exynos4210GicState *)opaque; qemu_set_irq(qdev_get_gpio_in(s->gic, irq), level); } static void exynos4210_gic_realize(DeviceState *dev, Error **errp) { Object *obj = OBJECT(dev); Exynos4210GicState *s = EXYNOS4210_GIC(obj); SysBusDevice *sbd = SYS_BUS_DEVICE(obj); const char cpu_prefix[] = "exynos4210-gic-alias_cpu"; const char dist_prefix[] = "exynos4210-gic-alias_dist"; char cpu_alias_name[sizeof(cpu_prefix) + 3]; char dist_alias_name[sizeof(cpu_prefix) + 3]; SysBusDevice *gicbusdev; uint32_t n = s->num_cpu; uint32_t i; s->gic = qdev_new("arm_gic"); qdev_prop_set_uint32(s->gic, "num-cpu", s->num_cpu); qdev_prop_set_uint32(s->gic, "num-irq", EXYNOS4210_GIC_NIRQ); gicbusdev = SYS_BUS_DEVICE(s->gic); sysbus_realize_and_unref(gicbusdev, &error_fatal); /* Pass through outbound IRQ lines from the GIC */ sysbus_pass_irq(sbd, gicbusdev); /* Pass through inbound GPIO lines to the GIC */ qdev_init_gpio_in(dev, exynos4210_gic_set_irq, EXYNOS4210_GIC_NIRQ - 32); memory_region_init(&s->cpu_container, obj, "exynos4210-cpu-container", EXYNOS4210_EXT_GIC_CPU_REGION_SIZE); memory_region_init(&s->dist_container, obj, "exynos4210-dist-container", EXYNOS4210_EXT_GIC_DIST_REGION_SIZE); /* * This clues in gcc that our on-stack buffers do, in fact have * enough room for the cpu numbers. gcc 9.2.1 on 32-bit x86 * doesn't figure this out, otherwise and gives spurious warnings. */ assert(n <= EXYNOS4210_NCPUS); for (i = 0; i < n; i++) { /* Map CPU interface per SMP Core */ sprintf(cpu_alias_name, "%s%x", cpu_prefix, i); memory_region_init_alias(&s->cpu_alias[i], obj, cpu_alias_name, sysbus_mmio_get_region(gicbusdev, 1), 0, EXYNOS4210_GIC_CPU_REGION_SIZE); memory_region_add_subregion(&s->cpu_container, EXYNOS4210_EXT_GIC_CPU_GET_OFFSET(i), &s->cpu_alias[i]); /* Map Distributor per SMP Core */ sprintf(dist_alias_name, "%s%x", dist_prefix, i); memory_region_init_alias(&s->dist_alias[i], obj, dist_alias_name, sysbus_mmio_get_region(gicbusdev, 0), 0, EXYNOS4210_GIC_DIST_REGION_SIZE); memory_region_add_subregion(&s->dist_container, EXYNOS4210_EXT_GIC_DIST_GET_OFFSET(i), &s->dist_alias[i]); } sysbus_init_mmio(sbd, &s->cpu_container); sysbus_init_mmio(sbd, &s->dist_container); } static Property exynos4210_gic_properties[] = { DEFINE_PROP_UINT32("num-cpu", Exynos4210GicState, num_cpu, 1), DEFINE_PROP_END_OF_LIST(), }; static void exynos4210_gic_class_init(ObjectClass *klass, void *data) { DeviceClass *dc = DEVICE_CLASS(klass); device_class_set_props(dc, exynos4210_gic_properties); dc->realize = exynos4210_gic_realize; } static const TypeInfo exynos4210_gic_info = { .name = TYPE_EXYNOS4210_GIC, .parent = TYPE_SYS_BUS_DEVICE, .instance_size = sizeof(Exynos4210GicState), .class_init = exynos4210_gic_class_init, }; static void exynos4210_gic_register_types(void) { type_register_static(&exynos4210_gic_info); } type_init(exynos4210_gic_register_types) /* IRQ OR Gate struct. * * This device models an OR gate. There are n_in input qdev gpio lines and one * output sysbus IRQ line. The output IRQ level is formed as OR between all * gpio inputs. */ #define TYPE_EXYNOS4210_IRQ_GATE "exynos4210.irq_gate" #define EXYNOS4210_IRQ_GATE(obj) \ OBJECT_CHECK(Exynos4210IRQGateState, (obj), TYPE_EXYNOS4210_IRQ_GATE) typedef struct Exynos4210IRQGateState { SysBusDevice parent_obj; uint32_t n_in; /* inputs amount */ uint32_t *level; /* input levels */ qemu_irq out; /* output IRQ */ } Exynos4210IRQGateState; static Property exynos4210_irq_gate_properties[] = { DEFINE_PROP_UINT32("n_in", Exynos4210IRQGateState, n_in, 1), DEFINE_PROP_END_OF_LIST(), }; static const VMStateDescription vmstate_exynos4210_irq_gate = { .name = "exynos4210.irq_gate", .version_id = 2, .minimum_version_id = 2, .fields = (VMStateField[]) { VMSTATE_VBUFFER_UINT32(level, Exynos4210IRQGateState, 1, NULL, n_in), VMSTATE_END_OF_LIST() } }; /* Process a change in IRQ input. */ static void exynos4210_irq_gate_handler(void *opaque, int irq, int level) { Exynos4210IRQGateState *s = (Exynos4210IRQGateState *)opaque; uint32_t i; assert(irq < s->n_in); s->level[irq] = level; for (i = 0; i < s->n_in; i++) { if (s->level[i] >= 1) { qemu_irq_raise(s->out); return; } } qemu_irq_lower(s->out); } static void exynos4210_irq_gate_reset(DeviceState *d) { Exynos4210IRQGateState *s = EXYNOS4210_IRQ_GATE(d); memset(s->level, 0, s->n_in * sizeof(*s->level)); } /* * IRQ Gate initialization. */ static void exynos4210_irq_gate_init(Object *obj) { Exynos4210IRQGateState *s = EXYNOS4210_IRQ_GATE(obj); SysBusDevice *sbd = SYS_BUS_DEVICE(obj); sysbus_init_irq(sbd, &s->out); } static void exynos4210_irq_gate_realize(DeviceState *dev, Error **errp) { Exynos4210IRQGateState *s = EXYNOS4210_IRQ_GATE(dev); /* Allocate general purpose input signals and connect a handler to each of * them */ qdev_init_gpio_in(dev, exynos4210_irq_gate_handler, s->n_in); s->level = g_malloc0(s->n_in * sizeof(*s->level)); } static void exynos4210_irq_gate_class_init(ObjectClass *klass, void *data) { DeviceClass *dc = DEVICE_CLASS(klass); dc->reset = exynos4210_irq_gate_reset; dc->vmsd = &vmstate_exynos4210_irq_gate; device_class_set_props(dc, exynos4210_irq_gate_properties); dc->realize = exynos4210_irq_gate_realize; } static const TypeInfo exynos4210_irq_gate_info = { .name = TYPE_EXYNOS4210_IRQ_GATE, .parent = TYPE_SYS_BUS_DEVICE, .instance_size = sizeof(Exynos4210IRQGateState), .instance_init = exynos4210_irq_gate_init, .class_init = exynos4210_irq_gate_class_init, }; static void exynos4210_irq_gate_register_types(void) { type_register_static(&exynos4210_irq_gate_info); } type_init(exynos4210_irq_gate_register_types)