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qemu-patch-raspberry4/hw/intc/slavio_intctl.c
Juan Quintela 35d08458a9 savevm: Remove all the unneeded version_minimum_id_old (rest) 
After previous Peter patch, they are redundant.  This way we don't
assign them except when needed.  Once there, there were lots of case
where the ".fields" indentation was wrong:

     .fields = (VMStateField []) {
and
     .fields =      (VMStateField []) {

Change all the combinations to:

     .fields = (VMStateField[]){

The biggest problem (appart from aesthetics) was that checkpatch complained
when we copy&pasted the code from one place to another.

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
2014-05-14 15:24:51 +02:00

472 lines
14 KiB
C
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/*
* QEMU Sparc SLAVIO interrupt controller emulation
*
* Copyright (c) 2003-2005 Fabrice Bellard
*
* 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/sparc/sun4m.h"
#include "monitor/monitor.h"
#include "hw/sysbus.h"
#include "trace.h"
//#define DEBUG_IRQ_COUNT
/*
* Registers of interrupt controller in sun4m.
*
* This is the interrupt controller part of chip STP2001 (Slave I/O), also
* produced as NCR89C105. See
* http://www.ibiblio.org/pub/historic-linux/early-ports/Sparc/NCR/NCR89C105.txt
*
* There is a system master controller and one for each cpu.
*
*/
#define MAX_CPUS 16
#define MAX_PILS 16
struct SLAVIO_INTCTLState;
typedef struct SLAVIO_CPUINTCTLState {
MemoryRegion iomem;
struct SLAVIO_INTCTLState *master;
uint32_t intreg_pending;
uint32_t cpu;
uint32_t irl_out;
} SLAVIO_CPUINTCTLState;
#define TYPE_SLAVIO_INTCTL "slavio_intctl"
#define SLAVIO_INTCTL(obj) \
OBJECT_CHECK(SLAVIO_INTCTLState, (obj), TYPE_SLAVIO_INTCTL)
typedef struct SLAVIO_INTCTLState {
SysBusDevice parent_obj;
MemoryRegion iomem;
#ifdef DEBUG_IRQ_COUNT
uint64_t irq_count[32];
#endif
qemu_irq cpu_irqs[MAX_CPUS][MAX_PILS];
SLAVIO_CPUINTCTLState slaves[MAX_CPUS];
uint32_t intregm_pending;
uint32_t intregm_disabled;
uint32_t target_cpu;
} SLAVIO_INTCTLState;
#define INTCTL_MAXADDR 0xf
#define INTCTL_SIZE (INTCTL_MAXADDR + 1)
#define INTCTLM_SIZE 0x14
#define MASTER_IRQ_MASK ~0x0fa2007f
#define MASTER_DISABLE 0x80000000
#define CPU_SOFTIRQ_MASK 0xfffe0000
#define CPU_IRQ_INT15_IN (1 << 15)
#define CPU_IRQ_TIMER_IN (1 << 14)
static void slavio_check_interrupts(SLAVIO_INTCTLState *s, int set_irqs);
// per-cpu interrupt controller
static uint64_t slavio_intctl_mem_readl(void *opaque, hwaddr addr,
unsigned size)
{
SLAVIO_CPUINTCTLState *s = opaque;
uint32_t saddr, ret;
saddr = addr >> 2;
switch (saddr) {
case 0:
ret = s->intreg_pending;
break;
default:
ret = 0;
break;
}
trace_slavio_intctl_mem_readl(s->cpu, addr, ret);
return ret;
}
static void slavio_intctl_mem_writel(void *opaque, hwaddr addr,
uint64_t val, unsigned size)
{
SLAVIO_CPUINTCTLState *s = opaque;
uint32_t saddr;
saddr = addr >> 2;
trace_slavio_intctl_mem_writel(s->cpu, addr, val);
switch (saddr) {
case 1: // clear pending softints
val &= CPU_SOFTIRQ_MASK | CPU_IRQ_INT15_IN;
s->intreg_pending &= ~val;
slavio_check_interrupts(s->master, 1);
trace_slavio_intctl_mem_writel_clear(s->cpu, val, s->intreg_pending);
break;
case 2: // set softint
val &= CPU_SOFTIRQ_MASK;
s->intreg_pending |= val;
slavio_check_interrupts(s->master, 1);
trace_slavio_intctl_mem_writel_set(s->cpu, val, s->intreg_pending);
break;
default:
break;
}
}
static const MemoryRegionOps slavio_intctl_mem_ops = {
.read = slavio_intctl_mem_readl,
.write = slavio_intctl_mem_writel,
.endianness = DEVICE_NATIVE_ENDIAN,
.valid = {
.min_access_size = 4,
.max_access_size = 4,
},
};
// master system interrupt controller
static uint64_t slavio_intctlm_mem_readl(void *opaque, hwaddr addr,
unsigned size)
{
SLAVIO_INTCTLState *s = opaque;
uint32_t saddr, ret;
saddr = addr >> 2;
switch (saddr) {
case 0:
ret = s->intregm_pending & ~MASTER_DISABLE;
break;
case 1:
ret = s->intregm_disabled & MASTER_IRQ_MASK;
break;
case 4:
ret = s->target_cpu;
break;
default:
ret = 0;
break;
}
trace_slavio_intctlm_mem_readl(addr, ret);
return ret;
}
static void slavio_intctlm_mem_writel(void *opaque, hwaddr addr,
uint64_t val, unsigned size)
{
SLAVIO_INTCTLState *s = opaque;
uint32_t saddr;
saddr = addr >> 2;
trace_slavio_intctlm_mem_writel(addr, val);
switch (saddr) {
case 2: // clear (enable)
// Force clear unused bits
val &= MASTER_IRQ_MASK;
s->intregm_disabled &= ~val;
trace_slavio_intctlm_mem_writel_enable(val, s->intregm_disabled);
slavio_check_interrupts(s, 1);
break;
case 3: // set (disable; doesn't affect pending)
// Force clear unused bits
val &= MASTER_IRQ_MASK;
s->intregm_disabled |= val;
slavio_check_interrupts(s, 1);
trace_slavio_intctlm_mem_writel_disable(val, s->intregm_disabled);
break;
case 4:
s->target_cpu = val & (MAX_CPUS - 1);
slavio_check_interrupts(s, 1);
trace_slavio_intctlm_mem_writel_target(s->target_cpu);
break;
default:
break;
}
}
static const MemoryRegionOps slavio_intctlm_mem_ops = {
.read = slavio_intctlm_mem_readl,
.write = slavio_intctlm_mem_writel,
.endianness = DEVICE_NATIVE_ENDIAN,
.valid = {
.min_access_size = 4,
.max_access_size = 4,
},
};
void slavio_pic_info(Monitor *mon, DeviceState *dev)
{
SLAVIO_INTCTLState *s = SLAVIO_INTCTL(dev);
int i;
for (i = 0; i < MAX_CPUS; i++) {
monitor_printf(mon, "per-cpu %d: pending 0x%08x\n", i,
s->slaves[i].intreg_pending);
}
monitor_printf(mon, "master: pending 0x%08x, disabled 0x%08x\n",
s->intregm_pending, s->intregm_disabled);
}
void slavio_irq_info(Monitor *mon, DeviceState *dev)
{
#ifndef DEBUG_IRQ_COUNT
monitor_printf(mon, "irq statistic code not compiled.\n");
#else
SLAVIO_INTCTLState *s = SLAVIO_INTCTL(dev);
int i;
int64_t count;
s = SLAVIO_INTCTL(dev);
monitor_printf(mon, "IRQ statistics:\n");
for (i = 0; i < 32; i++) {
count = s->irq_count[i];
if (count > 0)
monitor_printf(mon, "%2d: %" PRId64 "\n", i, count);
}
#endif
}
static const uint32_t intbit_to_level[] = {
2, 3, 5, 7, 9, 11, 13, 2, 3, 5, 7, 9, 11, 13, 12, 12,
6, 13, 4, 10, 8, 9, 11, 0, 0, 0, 0, 15, 15, 15, 15, 0,
};
static void slavio_check_interrupts(SLAVIO_INTCTLState *s, int set_irqs)
{
uint32_t pending = s->intregm_pending, pil_pending;
unsigned int i, j;
pending &= ~s->intregm_disabled;
trace_slavio_check_interrupts(pending, s->intregm_disabled);
for (i = 0; i < MAX_CPUS; i++) {
pil_pending = 0;
/* If we are the current interrupt target, get hard interrupts */
if (pending && !(s->intregm_disabled & MASTER_DISABLE) &&
(i == s->target_cpu)) {
for (j = 0; j < 32; j++) {
if ((pending & (1 << j)) && intbit_to_level[j]) {
pil_pending |= 1 << intbit_to_level[j];
}
}
}
/* Calculate current pending hard interrupts for display */
s->slaves[i].intreg_pending &= CPU_SOFTIRQ_MASK | CPU_IRQ_INT15_IN |
CPU_IRQ_TIMER_IN;
if (i == s->target_cpu) {
for (j = 0; j < 32; j++) {
if ((s->intregm_pending & (1U << j)) && intbit_to_level[j]) {
s->slaves[i].intreg_pending |= 1 << intbit_to_level[j];
}
}
}
/* Level 15 and CPU timer interrupts are only masked when
the MASTER_DISABLE bit is set */
if (!(s->intregm_disabled & MASTER_DISABLE)) {
pil_pending |= s->slaves[i].intreg_pending &
(CPU_IRQ_INT15_IN | CPU_IRQ_TIMER_IN);
}
/* Add soft interrupts */
pil_pending |= (s->slaves[i].intreg_pending & CPU_SOFTIRQ_MASK) >> 16;
if (set_irqs) {
/* Since there is not really an interrupt 0 (and pil_pending
* and irl_out bit zero are thus always zero) there is no need
* to do anything with cpu_irqs[i][0] and it is OK not to do
* the j=0 iteration of this loop.
*/
for (j = MAX_PILS-1; j > 0; j--) {
if (pil_pending & (1 << j)) {
if (!(s->slaves[i].irl_out & (1 << j))) {
qemu_irq_raise(s->cpu_irqs[i][j]);
}
} else {
if (s->slaves[i].irl_out & (1 << j)) {
qemu_irq_lower(s->cpu_irqs[i][j]);
}
}
}
}
s->slaves[i].irl_out = pil_pending;
}
}
/*
* "irq" here is the bit number in the system interrupt register to
* separate serial and keyboard interrupts sharing a level.
*/
static void slavio_set_irq(void *opaque, int irq, int level)
{
SLAVIO_INTCTLState *s = opaque;
uint32_t mask = 1 << irq;
uint32_t pil = intbit_to_level[irq];
unsigned int i;
trace_slavio_set_irq(s->target_cpu, irq, pil, level);
if (pil > 0) {
if (level) {
#ifdef DEBUG_IRQ_COUNT
s->irq_count[pil]++;
#endif
s->intregm_pending |= mask;
if (pil == 15) {
for (i = 0; i < MAX_CPUS; i++) {
s->slaves[i].intreg_pending |= 1 << pil;
}
}
} else {
s->intregm_pending &= ~mask;
if (pil == 15) {
for (i = 0; i < MAX_CPUS; i++) {
s->slaves[i].intreg_pending &= ~(1 << pil);
}
}
}
slavio_check_interrupts(s, 1);
}
}
static void slavio_set_timer_irq_cpu(void *opaque, int cpu, int level)
{
SLAVIO_INTCTLState *s = opaque;
trace_slavio_set_timer_irq_cpu(cpu, level);
if (level) {
s->slaves[cpu].intreg_pending |= CPU_IRQ_TIMER_IN;
} else {
s->slaves[cpu].intreg_pending &= ~CPU_IRQ_TIMER_IN;
}
slavio_check_interrupts(s, 1);
}
static void slavio_set_irq_all(void *opaque, int irq, int level)
{
if (irq < 32) {
slavio_set_irq(opaque, irq, level);
} else {
slavio_set_timer_irq_cpu(opaque, irq - 32, level);
}
}
static int vmstate_intctl_post_load(void *opaque, int version_id)
{
SLAVIO_INTCTLState *s = opaque;
slavio_check_interrupts(s, 0);
return 0;
}
static const VMStateDescription vmstate_intctl_cpu = {
.name ="slavio_intctl_cpu",
.version_id = 1,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_UINT32(intreg_pending, SLAVIO_CPUINTCTLState),
VMSTATE_END_OF_LIST()
}
};
static const VMStateDescription vmstate_intctl = {
.name ="slavio_intctl",
.version_id = 1,
.minimum_version_id = 1,
.post_load = vmstate_intctl_post_load,
.fields = (VMStateField[]) {
VMSTATE_STRUCT_ARRAY(slaves, SLAVIO_INTCTLState, MAX_CPUS, 1,
vmstate_intctl_cpu, SLAVIO_CPUINTCTLState),
VMSTATE_UINT32(intregm_pending, SLAVIO_INTCTLState),
VMSTATE_UINT32(intregm_disabled, SLAVIO_INTCTLState),
VMSTATE_UINT32(target_cpu, SLAVIO_INTCTLState),
VMSTATE_END_OF_LIST()
}
};
static void slavio_intctl_reset(DeviceState *d)
{
SLAVIO_INTCTLState *s = SLAVIO_INTCTL(d);
int i;
for (i = 0; i < MAX_CPUS; i++) {
s->slaves[i].intreg_pending = 0;
s->slaves[i].irl_out = 0;
}
s->intregm_disabled = ~MASTER_IRQ_MASK;
s->intregm_pending = 0;
s->target_cpu = 0;
slavio_check_interrupts(s, 0);
}
static int slavio_intctl_init1(SysBusDevice *sbd)
{
DeviceState *dev = DEVICE(sbd);
SLAVIO_INTCTLState *s = SLAVIO_INTCTL(dev);
unsigned int i, j;
char slave_name[45];
qdev_init_gpio_in(dev, slavio_set_irq_all, 32 + MAX_CPUS);
memory_region_init_io(&s->iomem, OBJECT(s), &slavio_intctlm_mem_ops, s,
"master-interrupt-controller", INTCTLM_SIZE);
sysbus_init_mmio(sbd, &s->iomem);
for (i = 0; i < MAX_CPUS; i++) {
snprintf(slave_name, sizeof(slave_name),
"slave-interrupt-controller-%i", i);
for (j = 0; j < MAX_PILS; j++) {
sysbus_init_irq(sbd, &s->cpu_irqs[i][j]);
}
memory_region_init_io(&s->slaves[i].iomem, OBJECT(s),
&slavio_intctl_mem_ops,
&s->slaves[i], slave_name, INTCTL_SIZE);
sysbus_init_mmio(sbd, &s->slaves[i].iomem);
s->slaves[i].cpu = i;
s->slaves[i].master = s;
}
return 0;
}
static void slavio_intctl_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
k->init = slavio_intctl_init1;
dc->reset = slavio_intctl_reset;
dc->vmsd = &vmstate_intctl;
}
static const TypeInfo slavio_intctl_info = {
.name = TYPE_SLAVIO_INTCTL,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(SLAVIO_INTCTLState),
.class_init = slavio_intctl_class_init,
};
static void slavio_intctl_register_types(void)
{
type_register_static(&slavio_intctl_info);
}
type_init(slavio_intctl_register_types)
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