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qemu/hw/exynos4210_gic.c
Evgeny Voevodin 8e03cf1eeb ARM: exynos4210: IRQ subsystem support. 
Signed-off-by: Evgeny Voevodin <e.voevodin@samsung.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2012-02-17 11:12:57 +00:00

459 lines
14 KiB
C
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/*
* 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 "sysbus.h"
#include "qemu-common.h"
#include "irq.h"
#include "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 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 },
/* 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 NCPU EXYNOS4210_NCPUS
#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);
return;
}
/*
* 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++) {
s->board_irqs[n] = qemu_irq_split(s->int_combiner_irq[n],
s->ext_combiner_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]);
}
}
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 *********/
static inline int
gic_get_current_cpu(void)
{
return cpu_single_env->cpu_index;
}
#include "arm_gic.c"
typedef struct {
gic_state gic;
MemoryRegion cpu_container;
MemoryRegion dist_container;
MemoryRegion cpu_alias[NCPU];
MemoryRegion dist_alias[NCPU];
uint32_t num_cpu;
} Exynos4210GicState;
static int exynos4210_gic_init(SysBusDevice *dev)
{
Exynos4210GicState *s = FROM_SYSBUSGIC(Exynos4210GicState, dev);
uint32_t i;
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];
gic_init(&s->gic, s->num_cpu, EXYNOS4210_GIC_NIRQ);
memory_region_init(&s->cpu_container, "exynos4210-cpu-container",
EXYNOS4210_EXT_GIC_CPU_REGION_SIZE);
memory_region_init(&s->dist_container, "exynos4210-dist-container",
EXYNOS4210_EXT_GIC_DIST_REGION_SIZE);
for (i = 0; i < s->num_cpu; i++) {
/* Map CPU interface per SMP Core */
sprintf(cpu_alias_name, "%s%x", cpu_prefix, i);
memory_region_init_alias(&s->cpu_alias[i],
cpu_alias_name,
&s->gic.cpuiomem[0],
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],
dist_alias_name,
&s->gic.iomem,
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(dev, &s->cpu_container);
sysbus_init_mmio(dev, &s->dist_container);
gic_cpu_write(&s->gic, 1, 0, 1);
return 0;
}
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);
SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
k->init = exynos4210_gic_init;
dc->props = exynos4210_gic_properties;
}
static TypeInfo exynos4210_gic_info = {
.name = "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)
/*
* IRQGate struct.
* IRQ Gate represents OR gate between GICs to pass IRQ to PIC.
*/
typedef struct {
SysBusDevice busdev;
qemu_irq pic_irq[NCPU]; /* output IRQs to PICs */
uint32_t gpio_level[EXYNOS4210_IRQ_GATE_NINPUTS]; /* Input levels */
} Exynos4210IRQGateState;
static const VMStateDescription vmstate_exynos4210_irq_gate = {
.name = "exynos4210.irq_gate",
.version_id = 1,
.minimum_version_id = 1,
.minimum_version_id_old = 1,
.fields = (VMStateField[]) {
VMSTATE_UINT32_ARRAY(gpio_level, Exynos4210IRQGateState,
EXYNOS4210_IRQ_GATE_NINPUTS),
VMSTATE_END_OF_LIST()
}
};
/* Process a change in an external IRQ input. */
static void exynos4210_irq_gate_handler(void *opaque, int irq, int level)
{
Exynos4210IRQGateState *s =
(Exynos4210IRQGateState *)opaque;
uint32_t odd, even;
if (irq & 1) {
odd = irq;
even = irq & ~1;
} else {
even = irq;
odd = irq | 1;
}
assert(irq < EXYNOS4210_IRQ_GATE_NINPUTS);
s->gpio_level[irq] = level;
if (s->gpio_level[odd] >= 1 || s->gpio_level[even] >= 1) {
qemu_irq_raise(s->pic_irq[even >> 1]);
} else {
qemu_irq_lower(s->pic_irq[even >> 1]);
}
return;
}
static void exynos4210_irq_gate_reset(DeviceState *d)
{
Exynos4210IRQGateState *s = (Exynos4210IRQGateState *)d;
memset(&s->gpio_level, 0, sizeof(s->gpio_level));
}
/*
* IRQ Gate initialization.
*/
static int exynos4210_irq_gate_init(SysBusDevice *dev)
{
unsigned int i;
Exynos4210IRQGateState *s =
FROM_SYSBUS(Exynos4210IRQGateState, dev);
/* Allocate general purpose input signals and connect a handler to each of
* them */
qdev_init_gpio_in(&s->busdev.qdev, exynos4210_irq_gate_handler,
EXYNOS4210_IRQ_GATE_NINPUTS);
/* Connect SysBusDev irqs to device specific irqs */
for (i = 0; i < NCPU; i++) {
sysbus_init_irq(dev, &s->pic_irq[i]);
}
return 0;
}
static void exynos4210_irq_gate_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
k->init = exynos4210_irq_gate_init;
dc->reset = exynos4210_irq_gate_reset;
dc->vmsd = &vmstate_exynos4210_irq_gate;
}
static TypeInfo exynos4210_irq_gate_info = {
.name = "exynos4210.irq_gate",
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(Exynos4210IRQGateState),
.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)
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