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qemu-patch-raspberry4/hw/intc/exynos4210_gic.c
Krzysztof Kozlowski ee78356eba hw/intc/exynos4210_gic: Use more meaningful name for local variable 
There are to SysBusDevice variables in exynos4210_gic_realize()
function: one for the device itself and second for arm_gic device.  Add
a prefix "gic" to the second one so it will be easier to understand the
code.

While at it, put local uninitialized 'i' variable at the end, next to
other uninitialized ones.

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2017-06-13 14:56:56 +01:00

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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 "qemu/osdep.h"
#include "hw/sysbus.h"
#include "qemu-common.h"
#include "hw/irq.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 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_init(Object *obj)
{
DeviceState *dev = DEVICE(obj);
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 i;
s->gic = qdev_create(NULL, "arm_gic");
qdev_prop_set_uint32(s->gic, "num-cpu", s->num_cpu);
qdev_prop_set_uint32(s->gic, "num-irq", EXYNOS4210_GIC_NIRQ);
qdev_init_nofail(s->gic);
gicbusdev = SYS_BUS_DEVICE(s->gic);
/* 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);
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], 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);
dc->props = exynos4210_gic_properties;
}
static const TypeInfo exynos4210_gic_info = {
.name = TYPE_EXYNOS4210_GIC,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(Exynos4210GicState),
.instance_init = exynos4210_gic_init,
.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;
dc->props = 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)
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