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/*
* QEMU Sparc SBI interrupt controller emulation
*
* Based on slavio_intctl, 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.h"
#include "sun4m.h"
#include "console.h"
//#define DEBUG_IRQ
#ifdef DEBUG_IRQ
#define DPRINTF(fmt, args...) \
do { printf("IRQ: " fmt , ##args); } while (0)
#else
#define DPRINTF(fmt, args...)
#endif
#define MAX_CPUS 16
#define SBI_NREGS 16
typedef struct SBIState {
uint32_t regs[SBI_NREGS];
uint32_t intreg_pending[MAX_CPUS];
qemu_irq *cpu_irqs[MAX_CPUS];
uint32_t pil_out[MAX_CPUS];
} SBIState;
#define SBI_SIZE (SBI_NREGS * 4)
#define SBI_MASK (SBI_SIZE - 1)
static void sbi_check_interrupts(void *opaque)
{
}
static void sbi_set_irq(void *opaque, int irq, int level)
{
}
static void sbi_set_timer_irq_cpu(void *opaque, int cpu, int level)
{
}
static uint32_t sbi_mem_readl(void *opaque, target_phys_addr_t addr)
{
SBIState *s = opaque;
uint32_t saddr, ret;
saddr = (addr & SBI_MASK) >> 2;
switch (saddr) {
default:
ret = s->regs[saddr];
break;
}
DPRINTF("read system reg 0x" TARGET_FMT_plx " = %x\n", addr, ret);
return ret;
}
static void sbi_mem_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
{
SBIState *s = opaque;
uint32_t saddr;
saddr = (addr & SBI_MASK) >> 2;
DPRINTF("write system reg 0x" TARGET_FMT_plx " = %x\n", addr, val);
switch (saddr) {
default:
s->regs[saddr] = val;
break;
}
}
static CPUReadMemoryFunc *sbi_mem_read[3] = {
NULL,
NULL,
sbi_mem_readl,
};
static CPUWriteMemoryFunc *sbi_mem_write[3] = {
NULL,
NULL,
sbi_mem_writel,
};
static void sbi_save(QEMUFile *f, void *opaque)
{
SBIState *s = opaque;
unsigned int i;
for (i = 0; i < MAX_CPUS; i++) {
qemu_put_be32s(f, &s->intreg_pending[i]);
}
}
static int sbi_load(QEMUFile *f, void *opaque, int version_id)
{
SBIState *s = opaque;
unsigned int i;
if (version_id != 1)
return -EINVAL;
for (i = 0; i < MAX_CPUS; i++) {
qemu_get_be32s(f, &s->intreg_pending[i]);
}
sbi_check_interrupts(s);
return 0;
}
static void sbi_reset(void *opaque)
{
SBIState *s = opaque;
unsigned int i;
for (i = 0; i < MAX_CPUS; i++) {
s->intreg_pending[i] = 0;
}
sbi_check_interrupts(s);
}
void *sbi_init(target_phys_addr_t addr, qemu_irq **irq, qemu_irq **cpu_irq,
qemu_irq **parent_irq)
{
unsigned int i;
int sbi_io_memory;
SBIState *s;
s = qemu_mallocz(sizeof(SBIState));
if (!s)
return NULL;
for (i = 0; i < MAX_CPUS; i++) {
s->cpu_irqs[i] = parent_irq[i];
}
sbi_io_memory = cpu_register_io_memory(0, sbi_mem_read, sbi_mem_write, s);
cpu_register_physical_memory(addr, SBI_SIZE, sbi_io_memory);
register_savevm("sbi", addr, 1, sbi_save, sbi_load, s);
qemu_register_reset(sbi_reset, s);
*irq = qemu_allocate_irqs(sbi_set_irq, s, 32);
*cpu_irq = qemu_allocate_irqs(sbi_set_timer_irq_cpu, s, MAX_CPUS);
sbi_reset(s);
return s;
}
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