mirror of https://gitee.com/openkylin/qemu.git
336 lines
9.0 KiB
C
336 lines
9.0 KiB
C
/*
|
|
* 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 "vl.h"
|
|
//#define DEBUG_IRQ_COUNT
|
|
//#define DEBUG_IRQ
|
|
|
|
#ifdef DEBUG_IRQ
|
|
#define DPRINTF(fmt, args...) \
|
|
do { printf("IRQ: " fmt , ##args); } while (0)
|
|
#else
|
|
#define DPRINTF(fmt, args...)
|
|
#endif
|
|
|
|
/*
|
|
* 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
|
|
|
|
typedef struct SLAVIO_INTCTLState {
|
|
uint32_t intreg_pending[MAX_CPUS];
|
|
uint32_t intregm_pending;
|
|
uint32_t intregm_disabled;
|
|
uint32_t target_cpu;
|
|
#ifdef DEBUG_IRQ_COUNT
|
|
uint64_t irq_count[32];
|
|
#endif
|
|
} SLAVIO_INTCTLState;
|
|
|
|
#define INTCTL_MAXADDR 0xf
|
|
#define INTCTLM_MAXADDR 0xf
|
|
static void slavio_check_interrupts(void *opaque);
|
|
|
|
// per-cpu interrupt controller
|
|
static uint32_t slavio_intctl_mem_readl(void *opaque, target_phys_addr_t addr)
|
|
{
|
|
SLAVIO_INTCTLState *s = opaque;
|
|
uint32_t saddr;
|
|
int cpu;
|
|
|
|
cpu = (addr & (MAX_CPUS - 1) * TARGET_PAGE_SIZE) >> 12;
|
|
saddr = (addr & INTCTL_MAXADDR) >> 2;
|
|
switch (saddr) {
|
|
case 0:
|
|
return s->intreg_pending[cpu];
|
|
default:
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void slavio_intctl_mem_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
|
|
{
|
|
SLAVIO_INTCTLState *s = opaque;
|
|
uint32_t saddr;
|
|
int cpu;
|
|
|
|
cpu = (addr & (MAX_CPUS - 1) * TARGET_PAGE_SIZE) >> 12;
|
|
saddr = (addr & INTCTL_MAXADDR) >> 2;
|
|
switch (saddr) {
|
|
case 1: // clear pending softints
|
|
if (val & 0x4000)
|
|
val |= 80000000;
|
|
val &= 0xfffe0000;
|
|
s->intreg_pending[cpu] &= ~val;
|
|
DPRINTF("Cleared cpu %d irq mask %x, curmask %x\n", cpu, val, s->intreg_pending[cpu]);
|
|
break;
|
|
case 2: // set softint
|
|
val &= 0xfffe0000;
|
|
s->intreg_pending[cpu] |= val;
|
|
DPRINTF("Set cpu %d irq mask %x, curmask %x\n", cpu, val, s->intreg_pending[cpu]);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
static CPUReadMemoryFunc *slavio_intctl_mem_read[3] = {
|
|
slavio_intctl_mem_readl,
|
|
slavio_intctl_mem_readl,
|
|
slavio_intctl_mem_readl,
|
|
};
|
|
|
|
static CPUWriteMemoryFunc *slavio_intctl_mem_write[3] = {
|
|
slavio_intctl_mem_writel,
|
|
slavio_intctl_mem_writel,
|
|
slavio_intctl_mem_writel,
|
|
};
|
|
|
|
// master system interrupt controller
|
|
static uint32_t slavio_intctlm_mem_readl(void *opaque, target_phys_addr_t addr)
|
|
{
|
|
SLAVIO_INTCTLState *s = opaque;
|
|
uint32_t saddr;
|
|
|
|
saddr = (addr & INTCTLM_MAXADDR) >> 2;
|
|
switch (saddr) {
|
|
case 0:
|
|
return s->intregm_pending & 0x7fffffff;
|
|
case 1:
|
|
return s->intregm_disabled;
|
|
case 4:
|
|
return s->target_cpu;
|
|
default:
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void slavio_intctlm_mem_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
|
|
{
|
|
SLAVIO_INTCTLState *s = opaque;
|
|
uint32_t saddr;
|
|
|
|
saddr = (addr & INTCTLM_MAXADDR) >> 2;
|
|
switch (saddr) {
|
|
case 2: // clear (enable)
|
|
// Force clear unused bits
|
|
val &= ~0x4fb2007f;
|
|
s->intregm_disabled &= ~val;
|
|
DPRINTF("Enabled master irq mask %x, curmask %x\n", val, s->intregm_disabled);
|
|
slavio_check_interrupts(s);
|
|
break;
|
|
case 3: // set (disable, clear pending)
|
|
// Force clear unused bits
|
|
val &= ~0x4fb2007f;
|
|
s->intregm_disabled |= val;
|
|
s->intregm_pending &= ~val;
|
|
DPRINTF("Disabled master irq mask %x, curmask %x\n", val, s->intregm_disabled);
|
|
break;
|
|
case 4:
|
|
s->target_cpu = val & (MAX_CPUS - 1);
|
|
DPRINTF("Set master irq cpu %d\n", s->target_cpu);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
static CPUReadMemoryFunc *slavio_intctlm_mem_read[3] = {
|
|
slavio_intctlm_mem_readl,
|
|
slavio_intctlm_mem_readl,
|
|
slavio_intctlm_mem_readl,
|
|
};
|
|
|
|
static CPUWriteMemoryFunc *slavio_intctlm_mem_write[3] = {
|
|
slavio_intctlm_mem_writel,
|
|
slavio_intctlm_mem_writel,
|
|
slavio_intctlm_mem_writel,
|
|
};
|
|
|
|
void slavio_pic_info(void *opaque)
|
|
{
|
|
SLAVIO_INTCTLState *s = opaque;
|
|
int i;
|
|
|
|
for (i = 0; i < MAX_CPUS; i++) {
|
|
term_printf("per-cpu %d: pending 0x%08x\n", i, s->intreg_pending[i]);
|
|
}
|
|
term_printf("master: pending 0x%08x, disabled 0x%08x\n", s->intregm_pending, s->intregm_disabled);
|
|
}
|
|
|
|
void slavio_irq_info(void *opaque)
|
|
{
|
|
#ifndef DEBUG_IRQ_COUNT
|
|
term_printf("irq statistic code not compiled.\n");
|
|
#else
|
|
SLAVIO_INTCTLState *s = opaque;
|
|
int i;
|
|
int64_t count;
|
|
|
|
term_printf("IRQ statistics:\n");
|
|
for (i = 0; i < 32; i++) {
|
|
count = s->irq_count[i];
|
|
if (count > 0)
|
|
term_printf("%2d: %lld\n", i, count);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
static const uint32_t intbit_to_level[32] = {
|
|
2, 3, 5, 7, 9, 11, 0, 14, 3, 5, 7, 9, 11, 13, 12, 12,
|
|
6, 0, 4, 10, 8, 0, 11, 0, 0, 0, 0, 0, 15, 0, 15, 0,
|
|
};
|
|
|
|
static void slavio_check_interrupts(void *opaque)
|
|
{
|
|
SLAVIO_INTCTLState *s = opaque;
|
|
uint32_t pending = s->intregm_pending;
|
|
unsigned int i, max = 0;
|
|
|
|
pending &= ~s->intregm_disabled;
|
|
|
|
if (pending && !(s->intregm_disabled & 0x80000000)) {
|
|
for (i = 0; i < 32; i++) {
|
|
if (pending & (1 << i)) {
|
|
if (max < intbit_to_level[i])
|
|
max = intbit_to_level[i];
|
|
}
|
|
}
|
|
if (cpu_single_env->interrupt_index == 0) {
|
|
DPRINTF("Triggered pil %d\n", max);
|
|
#ifdef DEBUG_IRQ_COUNT
|
|
s->irq_count[max]++;
|
|
#endif
|
|
cpu_single_env->interrupt_index = TT_EXTINT | max;
|
|
cpu_interrupt(cpu_single_env, CPU_INTERRUPT_HARD);
|
|
}
|
|
else
|
|
DPRINTF("Not triggered (pending %x), pending exception %x\n", pending, cpu_single_env->interrupt_index);
|
|
}
|
|
else
|
|
DPRINTF("Not triggered (pending %x), disabled %x\n", pending, s->intregm_disabled);
|
|
}
|
|
|
|
/*
|
|
* "irq" here is the bit number in the system interrupt register to
|
|
* separate serial and keyboard interrupts sharing a level.
|
|
*/
|
|
void slavio_pic_set_irq(void *opaque, int irq, int level)
|
|
{
|
|
SLAVIO_INTCTLState *s = opaque;
|
|
|
|
DPRINTF("Set irq %d level %d\n", irq, level);
|
|
if (irq < 32) {
|
|
uint32_t mask = 1 << irq;
|
|
uint32_t pil = intbit_to_level[irq];
|
|
if (pil > 0) {
|
|
if (level) {
|
|
s->intregm_pending |= mask;
|
|
s->intreg_pending[s->target_cpu] |= 1 << pil;
|
|
}
|
|
else {
|
|
s->intregm_pending &= ~mask;
|
|
s->intreg_pending[s->target_cpu] &= ~(1 << pil);
|
|
}
|
|
}
|
|
}
|
|
slavio_check_interrupts(s);
|
|
}
|
|
|
|
static void slavio_intctl_save(QEMUFile *f, void *opaque)
|
|
{
|
|
SLAVIO_INTCTLState *s = opaque;
|
|
int i;
|
|
|
|
for (i = 0; i < MAX_CPUS; i++) {
|
|
qemu_put_be32s(f, &s->intreg_pending[i]);
|
|
}
|
|
qemu_put_be32s(f, &s->intregm_pending);
|
|
qemu_put_be32s(f, &s->intregm_disabled);
|
|
qemu_put_be32s(f, &s->target_cpu);
|
|
}
|
|
|
|
static int slavio_intctl_load(QEMUFile *f, void *opaque, int version_id)
|
|
{
|
|
SLAVIO_INTCTLState *s = opaque;
|
|
int i;
|
|
|
|
if (version_id != 1)
|
|
return -EINVAL;
|
|
|
|
for (i = 0; i < MAX_CPUS; i++) {
|
|
qemu_get_be32s(f, &s->intreg_pending[i]);
|
|
}
|
|
qemu_get_be32s(f, &s->intregm_pending);
|
|
qemu_get_be32s(f, &s->intregm_disabled);
|
|
qemu_get_be32s(f, &s->target_cpu);
|
|
return 0;
|
|
}
|
|
|
|
static void slavio_intctl_reset(void *opaque)
|
|
{
|
|
SLAVIO_INTCTLState *s = opaque;
|
|
int i;
|
|
|
|
for (i = 0; i < MAX_CPUS; i++) {
|
|
s->intreg_pending[i] = 0;
|
|
}
|
|
s->intregm_disabled = ~0xffb2007f;
|
|
s->intregm_pending = 0;
|
|
s->target_cpu = 0;
|
|
}
|
|
|
|
void *slavio_intctl_init(uint32_t addr, uint32_t addrg)
|
|
{
|
|
int slavio_intctl_io_memory, slavio_intctlm_io_memory, i;
|
|
SLAVIO_INTCTLState *s;
|
|
|
|
s = qemu_mallocz(sizeof(SLAVIO_INTCTLState));
|
|
if (!s)
|
|
return NULL;
|
|
|
|
for (i = 0; i < MAX_CPUS; i++) {
|
|
slavio_intctl_io_memory = cpu_register_io_memory(0, slavio_intctl_mem_read, slavio_intctl_mem_write, s);
|
|
cpu_register_physical_memory(addr + i * TARGET_PAGE_SIZE, INTCTL_MAXADDR, slavio_intctl_io_memory);
|
|
}
|
|
|
|
slavio_intctlm_io_memory = cpu_register_io_memory(0, slavio_intctlm_mem_read, slavio_intctlm_mem_write, s);
|
|
cpu_register_physical_memory(addrg, INTCTLM_MAXADDR, slavio_intctlm_io_memory);
|
|
|
|
register_savevm("slavio_intctl", addr, 1, slavio_intctl_save, slavio_intctl_load, s);
|
|
qemu_register_reset(slavio_intctl_reset, s);
|
|
slavio_intctl_reset(s);
|
|
return s;
|
|
}
|
|
|