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xemu/hw/arm/pxa2xx_pic.c
Richard Henderson 5809ac5709 target/arm: Replace sentinels with ARRAY_SIZE in cpregs.h 
Remove a possible source of error by removing REGINFO_SENTINEL
and using ARRAY_SIZE (convinently hidden inside a macro) to
find the end of the set of regs being registered or modified.

The space saved by not having the extra array element reduces
the executable's .data.rel.ro section by about 9k.

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20220501055028.646596-4-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2022-05-05 09:35:50 +01:00

340 lines
10 KiB
C
Raw Blame History

/*
* 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 "qemu/osdep.h"
#include "qapi/error.h"
#include "qemu/module.h"
#include "qemu/log.h"
#include "cpu.h"
#include "hw/arm/pxa.h"
#include "hw/sysbus.h"
#include "migration/vmstate.h"
#include "qom/object.h"
#include "target/arm/cpregs.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"
OBJECT_DECLARE_SIMPLE_TYPE(PXA2xxPICState, PXA2XX_PIC)
struct PXA2xxPICState {
/*< 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];
};
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:
qemu_log_mask(LOG_GUEST_ERROR,
"pxa2xx_pic_mem_read: bad register offset 0x%" HWADDR_PRIx
"\n", 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:
qemu_log_mask(LOG_GUEST_ERROR,
"pxa2xx_pic_mem_write: bad register offset 0x%"
HWADDR_PRIx "\n", 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),
};
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_new(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;
sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
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 const 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 void pxa2xx_pic_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
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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