qemu/hw/intc/grlib_irqmp.c
Markus Armbruster 1b111dc121 hw: cannot_instantiate_with_device_add_yet due to pointer props
Pointer properties can be set only by code, not by device_add.  A
device with a pointer property can work with device_add only when the
property may remain null.

This is the case for property "interrupt_vector" of device
"etraxfs,pic".  Add a comment there.

Set cannot_instantiate_with_device_add_yet for the other devices with
pointer properties, with a comment explaining why.

Juha Riihimäki and Peter Maydell deserve my thanks for making "pointer
property must not remain null" blatantly obvious in the OMAP devices.

Only device "smbus-eeprom" is actually changed.  The others are all
sysbus devices, which get cannot_instantiate_with_device_add_yet set
in their abstract base's class init function.  Setting it again in
their class init function is technically redundant, but serves as
insurance for when sysbus devices become available with device_add,
and as documentation.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@gmail.com> (for ETRAX)
Signed-off-by: Andreas Färber <afaerber@suse.de>
2013-12-24 17:27:17 +01:00

375 lines
9.4 KiB
C

/*
* QEMU GRLIB IRQMP Emulator
*
* (Multiprocessor and extended interrupt not supported)
*
* Copyright (c) 2010-2011 AdaCore
*
* 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 "hw/sysbus.h"
#include "cpu.h"
#include "hw/sparc/grlib.h"
#include "trace.h"
#define IRQMP_MAX_CPU 16
#define IRQMP_REG_SIZE 256 /* Size of memory mapped registers */
/* Memory mapped register offsets */
#define LEVEL_OFFSET 0x00
#define PENDING_OFFSET 0x04
#define FORCE0_OFFSET 0x08
#define CLEAR_OFFSET 0x0C
#define MP_STATUS_OFFSET 0x10
#define BROADCAST_OFFSET 0x14
#define MASK_OFFSET 0x40
#define FORCE_OFFSET 0x80
#define EXTENDED_OFFSET 0xC0
#define TYPE_GRLIB_IRQMP "grlib,irqmp"
#define GRLIB_IRQMP(obj) OBJECT_CHECK(IRQMP, (obj), TYPE_GRLIB_IRQMP)
typedef struct IRQMPState IRQMPState;
typedef struct IRQMP {
SysBusDevice parent_obj;
MemoryRegion iomem;
void *set_pil_in;
void *set_pil_in_opaque;
IRQMPState *state;
} IRQMP;
struct IRQMPState {
uint32_t level;
uint32_t pending;
uint32_t clear;
uint32_t broadcast;
uint32_t mask[IRQMP_MAX_CPU];
uint32_t force[IRQMP_MAX_CPU];
uint32_t extended[IRQMP_MAX_CPU];
IRQMP *parent;
};
static void grlib_irqmp_check_irqs(IRQMPState *state)
{
uint32_t pend = 0;
uint32_t level0 = 0;
uint32_t level1 = 0;
set_pil_in_fn set_pil_in;
assert(state != NULL);
assert(state->parent != NULL);
/* IRQ for CPU 0 (no SMP support) */
pend = (state->pending | state->force[0])
& state->mask[0];
level0 = pend & ~state->level;
level1 = pend & state->level;
trace_grlib_irqmp_check_irqs(state->pending, state->force[0],
state->mask[0], level1, level0);
set_pil_in = (set_pil_in_fn)state->parent->set_pil_in;
/* Trigger level1 interrupt first and level0 if there is no level1 */
if (level1 != 0) {
set_pil_in(state->parent->set_pil_in_opaque, level1);
} else {
set_pil_in(state->parent->set_pil_in_opaque, level0);
}
}
void grlib_irqmp_ack(DeviceState *dev, int intno)
{
IRQMP *irqmp = GRLIB_IRQMP(dev);
IRQMPState *state;
uint32_t mask;
state = irqmp->state;
assert(state != NULL);
intno &= 15;
mask = 1 << intno;
trace_grlib_irqmp_ack(intno);
/* Clear registers */
state->pending &= ~mask;
state->force[0] &= ~mask; /* Only CPU 0 (No SMP support) */
grlib_irqmp_check_irqs(state);
}
void grlib_irqmp_set_irq(void *opaque, int irq, int level)
{
IRQMP *irqmp = GRLIB_IRQMP(opaque);
IRQMPState *s;
int i = 0;
s = irqmp->state;
assert(s != NULL);
assert(s->parent != NULL);
if (level) {
trace_grlib_irqmp_set_irq(irq);
if (s->broadcast & 1 << irq) {
/* Broadcasted IRQ */
for (i = 0; i < IRQMP_MAX_CPU; i++) {
s->force[i] |= 1 << irq;
}
} else {
s->pending |= 1 << irq;
}
grlib_irqmp_check_irqs(s);
}
}
static uint64_t grlib_irqmp_read(void *opaque, hwaddr addr,
unsigned size)
{
IRQMP *irqmp = opaque;
IRQMPState *state;
assert(irqmp != NULL);
state = irqmp->state;
assert(state != NULL);
addr &= 0xff;
/* global registers */
switch (addr) {
case LEVEL_OFFSET:
return state->level;
case PENDING_OFFSET:
return state->pending;
case FORCE0_OFFSET:
/* This register is an "alias" for the force register of CPU 0 */
return state->force[0];
case CLEAR_OFFSET:
case MP_STATUS_OFFSET:
/* Always read as 0 */
return 0;
case BROADCAST_OFFSET:
return state->broadcast;
default:
break;
}
/* mask registers */
if (addr >= MASK_OFFSET && addr < FORCE_OFFSET) {
int cpu = (addr - MASK_OFFSET) / 4;
assert(cpu >= 0 && cpu < IRQMP_MAX_CPU);
return state->mask[cpu];
}
/* force registers */
if (addr >= FORCE_OFFSET && addr < EXTENDED_OFFSET) {
int cpu = (addr - FORCE_OFFSET) / 4;
assert(cpu >= 0 && cpu < IRQMP_MAX_CPU);
return state->force[cpu];
}
/* extended (not supported) */
if (addr >= EXTENDED_OFFSET && addr < IRQMP_REG_SIZE) {
int cpu = (addr - EXTENDED_OFFSET) / 4;
assert(cpu >= 0 && cpu < IRQMP_MAX_CPU);
return state->extended[cpu];
}
trace_grlib_irqmp_readl_unknown(addr);
return 0;
}
static void grlib_irqmp_write(void *opaque, hwaddr addr,
uint64_t value, unsigned size)
{
IRQMP *irqmp = opaque;
IRQMPState *state;
assert(irqmp != NULL);
state = irqmp->state;
assert(state != NULL);
addr &= 0xff;
/* global registers */
switch (addr) {
case LEVEL_OFFSET:
value &= 0xFFFF << 1; /* clean up the value */
state->level = value;
return;
case PENDING_OFFSET:
/* Read Only */
return;
case FORCE0_OFFSET:
/* This register is an "alias" for the force register of CPU 0 */
value &= 0xFFFE; /* clean up the value */
state->force[0] = value;
grlib_irqmp_check_irqs(irqmp->state);
return;
case CLEAR_OFFSET:
value &= ~1; /* clean up the value */
state->pending &= ~value;
return;
case MP_STATUS_OFFSET:
/* Read Only (no SMP support) */
return;
case BROADCAST_OFFSET:
value &= 0xFFFE; /* clean up the value */
state->broadcast = value;
return;
default:
break;
}
/* mask registers */
if (addr >= MASK_OFFSET && addr < FORCE_OFFSET) {
int cpu = (addr - MASK_OFFSET) / 4;
assert(cpu >= 0 && cpu < IRQMP_MAX_CPU);
value &= ~1; /* clean up the value */
state->mask[cpu] = value;
grlib_irqmp_check_irqs(irqmp->state);
return;
}
/* force registers */
if (addr >= FORCE_OFFSET && addr < EXTENDED_OFFSET) {
int cpu = (addr - FORCE_OFFSET) / 4;
assert(cpu >= 0 && cpu < IRQMP_MAX_CPU);
uint32_t force = value & 0xFFFE;
uint32_t clear = (value >> 16) & 0xFFFE;
uint32_t old = state->force[cpu];
state->force[cpu] = (old | force) & ~clear;
grlib_irqmp_check_irqs(irqmp->state);
return;
}
/* extended (not supported) */
if (addr >= EXTENDED_OFFSET && addr < IRQMP_REG_SIZE) {
int cpu = (addr - EXTENDED_OFFSET) / 4;
assert(cpu >= 0 && cpu < IRQMP_MAX_CPU);
value &= 0xF; /* clean up the value */
state->extended[cpu] = value;
return;
}
trace_grlib_irqmp_writel_unknown(addr, value);
}
static const MemoryRegionOps grlib_irqmp_ops = {
.read = grlib_irqmp_read,
.write = grlib_irqmp_write,
.endianness = DEVICE_NATIVE_ENDIAN,
.valid = {
.min_access_size = 4,
.max_access_size = 4,
},
};
static void grlib_irqmp_reset(DeviceState *d)
{
IRQMP *irqmp = GRLIB_IRQMP(d);
assert(irqmp->state != NULL);
memset(irqmp->state, 0, sizeof *irqmp->state);
irqmp->state->parent = irqmp;
}
static int grlib_irqmp_init(SysBusDevice *dev)
{
IRQMP *irqmp = GRLIB_IRQMP(dev);
/* Check parameters */
if (irqmp->set_pil_in == NULL) {
return -1;
}
memory_region_init_io(&irqmp->iomem, OBJECT(dev), &grlib_irqmp_ops, irqmp,
"irqmp", IRQMP_REG_SIZE);
irqmp->state = g_malloc0(sizeof *irqmp->state);
sysbus_init_mmio(dev, &irqmp->iomem);
return 0;
}
static Property grlib_irqmp_properties[] = {
DEFINE_PROP_PTR("set_pil_in", IRQMP, set_pil_in),
DEFINE_PROP_PTR("set_pil_in_opaque", IRQMP, set_pil_in_opaque),
DEFINE_PROP_END_OF_LIST(),
};
static void grlib_irqmp_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
k->init = grlib_irqmp_init;
dc->reset = grlib_irqmp_reset;
dc->props = grlib_irqmp_properties;
/* Reason: pointer properties "set_pil_in", "set_pil_in_opaque" */
dc->cannot_instantiate_with_device_add_yet = true;
}
static const TypeInfo grlib_irqmp_info = {
.name = TYPE_GRLIB_IRQMP,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(IRQMP),
.class_init = grlib_irqmp_class_init,
};
static void grlib_irqmp_register_types(void)
{
type_register_static(&grlib_irqmp_info);
}
type_init(grlib_irqmp_register_types)