/*
* QEMU Sparc SLAVIO aux io port emulation
*
* Copyright (c) 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"
/* debug misc */
//#define DEBUG_MISC
/*
* This is the auxio port, chip control and system control 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
*
* This also includes the PMC CPU idle controller.
*/
#ifdef DEBUG_MISC
#define MISC_DPRINTF(fmt, args...) \
do { printf("MISC: " fmt , ##args); } while (0)
#else
#define MISC_DPRINTF(fmt, args...)
#endif
typedef struct MiscState {
int irq;
uint8_t config;
uint8_t aux1, aux2;
uint8_t diag, mctrl, sysctrl;
} MiscState;
#define MISC_MAXADDR 1
static void slavio_misc_update_irq(void *opaque)
{
MiscState *s = opaque;
if ((s->aux2 & 0x4) && (s->config & 0x8)) {
pic_set_irq(s->irq, 1);
} else {
pic_set_irq(s->irq, 0);
}
}
static void slavio_misc_reset(void *opaque)
{
MiscState *s = opaque;
// Diagnostic and system control registers not cleared in reset
s->config = s->aux1 = s->aux2 = s->mctrl = 0;
}
void slavio_set_power_fail(void *opaque, int power_failing)
{
MiscState *s = opaque;
MISC_DPRINTF("Power fail: %d, config: %d\n", power_failing, s->config);
if (power_failing && (s->config & 0x8)) {
s->aux2 |= 0x4;
} else {
s->aux2 &= ~0x4;
}
slavio_misc_update_irq(s);
}
static void slavio_misc_mem_writeb(void *opaque, target_phys_addr_t addr, uint32_t val)
{
MiscState *s = opaque;
switch (addr & 0xfff0000) {
case 0x1800000:
MISC_DPRINTF("Write config %2.2x\n", val & 0xff);
s->config = val & 0xff;
slavio_misc_update_irq(s);
break;
case 0x1900000:
MISC_DPRINTF("Write aux1 %2.2x\n", val & 0xff);
s->aux1 = val & 0xff;
break;
case 0x1910000:
val &= 0x3;
MISC_DPRINTF("Write aux2 %2.2x\n", val);
val |= s->aux2 & 0x4;
if (val & 0x2) // Clear Power Fail int
val &= 0x1;
s->aux2 = val;
if (val & 1)
qemu_system_shutdown_request();
slavio_misc_update_irq(s);
break;
case 0x1a00000:
MISC_DPRINTF("Write diag %2.2x\n", val & 0xff);
s->diag = val & 0xff;
break;
case 0x1b00000:
MISC_DPRINTF("Write modem control %2.2x\n", val & 0xff);
s->mctrl = val & 0xff;
break;
case 0x1f00000:
MISC_DPRINTF("Write system control %2.2x\n", val & 0xff);
if (val & 1) {
s->sysctrl = 0x2;
qemu_system_reset_request();
}
break;
case 0xa000000:
MISC_DPRINTF("Write power management %2.2x\n", val & 0xff);
#if 0
// XXX almost works
cpu_interrupt(cpu_single_env, CPU_INTERRUPT_HALT);
#endif
break;
}
}
static uint32_t slavio_misc_mem_readb(void *opaque, target_phys_addr_t addr)
{
MiscState *s = opaque;
uint32_t ret = 0;
switch (addr & 0xfff0000) {
case 0x1800000:
ret = s->config;
MISC_DPRINTF("Read config %2.2x\n", ret);
break;
case 0x1900000:
ret = s->aux1;
MISC_DPRINTF("Read aux1 %2.2x\n", ret);
break;
case 0x1910000:
ret = s->aux2;
MISC_DPRINTF("Read aux2 %2.2x\n", ret);
break;
case 0x1a00000:
ret = s->diag;
MISC_DPRINTF("Read diag %2.2x\n", ret);
break;
case 0x1b00000:
ret = s->mctrl;
MISC_DPRINTF("Read modem control %2.2x\n", ret);
break;
case 0x1f00000:
MISC_DPRINTF("Read system control %2.2x\n", ret);
ret = s->sysctrl;
break;
case 0xa000000:
MISC_DPRINTF("Read power management %2.2x\n", ret);
break;
}
return ret;
}
static CPUReadMemoryFunc *slavio_misc_mem_read[3] = {
slavio_misc_mem_readb,
slavio_misc_mem_readb,
slavio_misc_mem_readb,
};
static CPUWriteMemoryFunc *slavio_misc_mem_write[3] = {
slavio_misc_mem_writeb,
slavio_misc_mem_writeb,
slavio_misc_mem_writeb,
};
static void slavio_misc_save(QEMUFile *f, void *opaque)
{
MiscState *s = opaque;
qemu_put_be32s(f, &s->irq);
qemu_put_8s(f, &s->config);
qemu_put_8s(f, &s->aux1);
qemu_put_8s(f, &s->aux2);
qemu_put_8s(f, &s->diag);
qemu_put_8s(f, &s->mctrl);
qemu_put_8s(f, &s->sysctrl);
}
static int slavio_misc_load(QEMUFile *f, void *opaque, int version_id)
{
MiscState *s = opaque;
if (version_id != 1)
return -EINVAL;
qemu_get_be32s(f, &s->irq);
qemu_get_8s(f, &s->config);
qemu_get_8s(f, &s->aux1);
qemu_get_8s(f, &s->aux2);
qemu_get_8s(f, &s->diag);
qemu_get_8s(f, &s->mctrl);
qemu_get_8s(f, &s->sysctrl);
return 0;
}
void *slavio_misc_init(uint32_t base, int irq)
{
int slavio_misc_io_memory;
MiscState *s;
s = qemu_mallocz(sizeof(MiscState));
if (!s)
return NULL;
slavio_misc_io_memory = cpu_register_io_memory(0, slavio_misc_mem_read, slavio_misc_mem_write, s);
// Slavio control
cpu_register_physical_memory(base + 0x1800000, MISC_MAXADDR, slavio_misc_io_memory);
// AUX 1
cpu_register_physical_memory(base + 0x1900000, MISC_MAXADDR, slavio_misc_io_memory);
// AUX 2
cpu_register_physical_memory(base + 0x1910000, MISC_MAXADDR, slavio_misc_io_memory);
// Diagnostics
cpu_register_physical_memory(base + 0x1a00000, MISC_MAXADDR, slavio_misc_io_memory);
// Modem control
cpu_register_physical_memory(base + 0x1b00000, MISC_MAXADDR, slavio_misc_io_memory);
// System control
cpu_register_physical_memory(base + 0x1f00000, MISC_MAXADDR, slavio_misc_io_memory);
// Power management
cpu_register_physical_memory(base + 0xa000000, MISC_MAXADDR, slavio_misc_io_memory);
s->irq = irq;
register_savevm("slavio_misc", base, 1, slavio_misc_save, slavio_misc_load, s);
qemu_register_reset(slavio_misc_reset, s);
slavio_misc_reset(s);
return s;
}
