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qemu/hw/rc4030.c
Jan Kiszka 8217606e6e Introduce reset notifier order 
Add the parameter 'order' to qemu_register_reset and sort callbacks on
registration. On system reset, callbacks with lower order will be
invoked before those with higher order. Update all existing users to the
standard order 0.

Note: At least for x86, the existing users seem to assume that handlers
are called in their registration order. Therefore, the patch preserves
this property. If someone feels bored, (s)he could try to identify this
dependency and express it properly on callback registration.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2009-05-22 10:50:34 -05:00

824 lines
21 KiB
C
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/*
* QEMU JAZZ RC4030 chipset
*
* Copyright (c) 2007-2009 Herve Poussineau
*
* 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 "mips.h"
#include "qemu-timer.h"
/********************************************************/
/* debug rc4030 */
//#define DEBUG_RC4030
//#define DEBUG_RC4030_DMA
#ifdef DEBUG_RC4030
#define DPRINTF(fmt, ...) \
do { printf("rc4030: " fmt , ## __VA_ARGS__); } while (0)
static const char* irq_names[] = { "parallel", "floppy", "sound", "video",
"network", "scsi", "keyboard", "mouse", "serial0", "serial1" };
#else
#define DPRINTF(fmt, ...)
#endif
#define RC4030_ERROR(fmt, ...) \
do { fprintf(stderr, "rc4030 ERROR: %s: " fmt, __func__ , ## __VA_ARGS__); } while (0)
/********************************************************/
/* rc4030 emulation */
typedef struct dma_pagetable_entry {
int32_t frame;
int32_t owner;
} __attribute__((packed)) dma_pagetable_entry;
#define DMA_PAGESIZE 4096
#define DMA_REG_ENABLE 1
#define DMA_REG_COUNT 2
#define DMA_REG_ADDRESS 3
#define DMA_FLAG_ENABLE 0x0001
#define DMA_FLAG_MEM_TO_DEV 0x0002
#define DMA_FLAG_TC_INTR 0x0100
#define DMA_FLAG_MEM_INTR 0x0200
#define DMA_FLAG_ADDR_INTR 0x0400
typedef struct rc4030State
{
uint32_t config; /* 0x0000: RC4030 config register */
uint32_t revision; /* 0x0008: RC4030 Revision register */
uint32_t invalid_address_register; /* 0x0010: Invalid Address register */
/* DMA */
uint32_t dma_regs[8][4];
uint32_t dma_tl_base; /* 0x0018: DMA transl. table base */
uint32_t dma_tl_limit; /* 0x0020: DMA transl. table limit */
/* cache */
uint32_t cache_maint; /* 0x0030: Cache Maintenance */
uint32_t remote_failed_address; /* 0x0038: Remote Failed Address */
uint32_t memory_failed_address; /* 0x0040: Memory Failed Address */
uint32_t cache_ptag; /* 0x0048: I/O Cache Physical Tag */
uint32_t cache_ltag; /* 0x0050: I/O Cache Logical Tag */
uint32_t cache_bmask; /* 0x0058: I/O Cache Byte Mask */
uint32_t nmi_interrupt; /* 0x0200: interrupt source */
uint32_t offset210;
uint32_t nvram_protect; /* 0x0220: NV ram protect register */
uint32_t rem_speed[16];
uint32_t imr_jazz; /* Local bus int enable mask */
uint32_t isr_jazz; /* Local bus int source */
/* timer */
QEMUTimer *periodic_timer;
uint32_t itr; /* Interval timer reload */
qemu_irq timer_irq;
qemu_irq jazz_bus_irq;
} rc4030State;
static void set_next_tick(rc4030State *s)
{
qemu_irq_lower(s->timer_irq);
uint32_t tm_hz;
tm_hz = 1000 / (s->itr + 1);
qemu_mod_timer(s->periodic_timer, qemu_get_clock(vm_clock) + ticks_per_sec / tm_hz);
}
/* called for accesses to rc4030 */
static uint32_t rc4030_readl(void *opaque, target_phys_addr_t addr)
{
rc4030State *s = opaque;
uint32_t val;
addr &= 0x3fff;
switch (addr & ~0x3) {
/* Global config register */
case 0x0000:
val = s->config;
break;
/* Revision register */
case 0x0008:
val = s->revision;
break;
/* Invalid Address register */
case 0x0010:
val = s->invalid_address_register;
break;
/* DMA transl. table base */
case 0x0018:
val = s->dma_tl_base;
break;
/* DMA transl. table limit */
case 0x0020:
val = s->dma_tl_limit;
break;
/* Remote Failed Address */
case 0x0038:
val = s->remote_failed_address;
break;
/* Memory Failed Address */
case 0x0040:
val = s->memory_failed_address;
break;
/* I/O Cache Byte Mask */
case 0x0058:
val = s->cache_bmask;
/* HACK */
if (s->cache_bmask == (uint32_t)-1)
s->cache_bmask = 0;
break;
/* Remote Speed Registers */
case 0x0070:
case 0x0078:
case 0x0080:
case 0x0088:
case 0x0090:
case 0x0098:
case 0x00a0:
case 0x00a8:
case 0x00b0:
case 0x00b8:
case 0x00c0:
case 0x00c8:
case 0x00d0:
case 0x00d8:
case 0x00e0:
case 0x00e8:
val = s->rem_speed[(addr - 0x0070) >> 3];
break;
/* DMA channel base address */
case 0x0100:
case 0x0108:
case 0x0110:
case 0x0118:
case 0x0120:
case 0x0128:
case 0x0130:
case 0x0138:
case 0x0140:
case 0x0148:
case 0x0150:
case 0x0158:
case 0x0160:
case 0x0168:
case 0x0170:
case 0x0178:
case 0x0180:
case 0x0188:
case 0x0190:
case 0x0198:
case 0x01a0:
case 0x01a8:
case 0x01b0:
case 0x01b8:
case 0x01c0:
case 0x01c8:
case 0x01d0:
case 0x01d8:
case 0x01e0:
case 0x01e8:
case 0x01f0:
case 0x01f8:
{
int entry = (addr - 0x0100) >> 5;
int idx = (addr & 0x1f) >> 3;
val = s->dma_regs[entry][idx];
}
break;
/* Interrupt source */
case 0x0200:
val = s->nmi_interrupt;
break;
/* Error type */
case 0x0208:
val = 0;
break;
/* Offset 0x0210 */
case 0x0210:
val = s->offset210;
break;
/* NV ram protect register */
case 0x0220:
val = s->nvram_protect;
break;
/* Interval timer count */
case 0x0230:
val = 0;
qemu_irq_lower(s->timer_irq);
break;
/* EISA interrupt */
case 0x0238:
val = 7; /* FIXME: should be read from EISA controller */
break;
default:
RC4030_ERROR("invalid read [" TARGET_FMT_plx "]\n", addr);
val = 0;
break;
}
if ((addr & ~3) != 0x230)
DPRINTF("read 0x%02x at " TARGET_FMT_plx "\n", val, addr);
return val;
}
static uint32_t rc4030_readw(void *opaque, target_phys_addr_t addr)
{
uint32_t v = rc4030_readl(opaque, addr & ~0x3);
if (addr & 0x2)
return v >> 16;
else
return v & 0xffff;
}
static uint32_t rc4030_readb(void *opaque, target_phys_addr_t addr)
{
uint32_t v = rc4030_readl(opaque, addr & ~0x3);
return (v >> (8 * (addr & 0x3))) & 0xff;
}
static void rc4030_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
{
rc4030State *s = opaque;
addr &= 0x3fff;
DPRINTF("write 0x%02x at " TARGET_FMT_plx "\n", val, addr);
switch (addr & ~0x3) {
/* Global config register */
case 0x0000:
s->config = val;
break;
/* DMA transl. table base */
case 0x0018:
s->dma_tl_base = val;
break;
/* DMA transl. table limit */
case 0x0020:
s->dma_tl_limit = val;
break;
/* DMA transl. table invalidated */
case 0x0028:
break;
/* Cache Maintenance */
case 0x0030:
s->cache_maint = val;
break;
/* I/O Cache Physical Tag */
case 0x0048:
s->cache_ptag = val;
break;
/* I/O Cache Logical Tag */
case 0x0050:
s->cache_ltag = val;
break;
/* I/O Cache Byte Mask */
case 0x0058:
s->cache_bmask |= val; /* HACK */
break;
/* I/O Cache Buffer Window */
case 0x0060:
/* HACK */
if (s->cache_ltag == 0x80000001 && s->cache_bmask == 0xf0f0f0f) {
target_phys_addr_t dest = s->cache_ptag & ~0x1;
dest += (s->cache_maint & 0x3) << 3;
cpu_physical_memory_rw(dest, (uint8_t*)&val, 4, 1);
}
break;
/* Remote Speed Registers */
case 0x0070:
case 0x0078:
case 0x0080:
case 0x0088:
case 0x0090:
case 0x0098:
case 0x00a0:
case 0x00a8:
case 0x00b0:
case 0x00b8:
case 0x00c0:
case 0x00c8:
case 0x00d0:
case 0x00d8:
case 0x00e0:
case 0x00e8:
s->rem_speed[(addr - 0x0070) >> 3] = val;
break;
/* DMA channel base address */
case 0x0100:
case 0x0108:
case 0x0110:
case 0x0118:
case 0x0120:
case 0x0128:
case 0x0130:
case 0x0138:
case 0x0140:
case 0x0148:
case 0x0150:
case 0x0158:
case 0x0160:
case 0x0168:
case 0x0170:
case 0x0178:
case 0x0180:
case 0x0188:
case 0x0190:
case 0x0198:
case 0x01a0:
case 0x01a8:
case 0x01b0:
case 0x01b8:
case 0x01c0:
case 0x01c8:
case 0x01d0:
case 0x01d8:
case 0x01e0:
case 0x01e8:
case 0x01f0:
case 0x01f8:
{
int entry = (addr - 0x0100) >> 5;
int idx = (addr & 0x1f) >> 3;
s->dma_regs[entry][idx] = val;
}
break;
/* Offset 0x0210 */
case 0x0210:
s->offset210 = val;
break;
/* Interval timer reload */
case 0x0228:
s->itr = val;
qemu_irq_lower(s->timer_irq);
set_next_tick(s);
break;
/* EISA interrupt */
case 0x0238:
break;
default:
RC4030_ERROR("invalid write of 0x%02x at [" TARGET_FMT_plx "]\n", val, addr);
break;
}
}
static void rc4030_writew(void *opaque, target_phys_addr_t addr, uint32_t val)
{
uint32_t old_val = rc4030_readl(opaque, addr & ~0x3);
if (addr & 0x2)
val = (val << 16) | (old_val & 0x0000ffff);
else
val = val | (old_val & 0xffff0000);
rc4030_writel(opaque, addr & ~0x3, val);
}
static void rc4030_writeb(void *opaque, target_phys_addr_t addr, uint32_t val)
{
uint32_t old_val = rc4030_readl(opaque, addr & ~0x3);
switch (addr & 3) {
case 0:
val = val | (old_val & 0xffffff00);
break;
case 1:
val = (val << 8) | (old_val & 0xffff00ff);
break;
case 2:
val = (val << 16) | (old_val & 0xff00ffff);
break;
case 3:
val = (val << 24) | (old_val & 0x00ffffff);
break;
}
rc4030_writel(opaque, addr & ~0x3, val);
}
static CPUReadMemoryFunc *rc4030_read[3] = {
rc4030_readb,
rc4030_readw,
rc4030_readl,
};
static CPUWriteMemoryFunc *rc4030_write[3] = {
rc4030_writeb,
rc4030_writew,
rc4030_writel,
};
static void update_jazz_irq(rc4030State *s)
{
uint16_t pending;
pending = s->isr_jazz & s->imr_jazz;
#ifdef DEBUG_RC4030
if (s->isr_jazz != 0) {
uint32_t irq = 0;
DPRINTF("pending irqs:");
for (irq = 0; irq < ARRAY_SIZE(irq_names); irq++) {
if (s->isr_jazz & (1 << irq)) {
printf(" %s", irq_names[irq]);
if (!(s->imr_jazz & (1 << irq))) {
printf("(ignored)");
}
}
}
printf("\n");
}
#endif
if (pending != 0)
qemu_irq_raise(s->jazz_bus_irq);
else
qemu_irq_lower(s->jazz_bus_irq);
}
static void rc4030_irq_jazz_request(void *opaque, int irq, int level)
{
rc4030State *s = opaque;
if (level) {
s->isr_jazz |= 1 << irq;
} else {
s->isr_jazz &= ~(1 << irq);
}
update_jazz_irq(s);
}
static void rc4030_periodic_timer(void *opaque)
{
rc4030State *s = opaque;
set_next_tick(s);
qemu_irq_raise(s->timer_irq);
}
static uint32_t jazzio_readw(void *opaque, target_phys_addr_t addr)
{
rc4030State *s = opaque;
uint32_t val;
uint32_t irq;
addr &= 0xfff;
switch (addr) {
/* Local bus int source */
case 0x00: {
uint32_t pending = s->isr_jazz & s->imr_jazz;
val = 0;
irq = 0;
while (pending) {
if (pending & 1) {
DPRINTF("returning irq %s\n", irq_names[irq]);
val = (irq + 1) << 2;
break;
}
irq++;
pending >>= 1;
}
break;
}
/* Local bus int enable mask */
case 0x02:
val = s->imr_jazz;
break;
default:
RC4030_ERROR("(jazz io controller) invalid read [" TARGET_FMT_plx "]\n", addr);
val = 0;
}
DPRINTF("(jazz io controller) read 0x%04x at " TARGET_FMT_plx "\n", val, addr);
return val;
}
static uint32_t jazzio_readb(void *opaque, target_phys_addr_t addr)
{
uint32_t v;
v = jazzio_readw(opaque, addr & ~0x1);
return (v >> (8 * (addr & 0x1))) & 0xff;
}
static uint32_t jazzio_readl(void *opaque, target_phys_addr_t addr)
{
uint32_t v;
v = jazzio_readw(opaque, addr);
v |= jazzio_readw(opaque, addr + 2) << 16;
return v;
}
static void jazzio_writew(void *opaque, target_phys_addr_t addr, uint32_t val)
{
rc4030State *s = opaque;
addr &= 0xfff;
DPRINTF("(jazz io controller) write 0x%04x at " TARGET_FMT_plx "\n", val, addr);
switch (addr) {
/* Local bus int enable mask */
case 0x02:
s->imr_jazz = val;
update_jazz_irq(s);
break;
default:
RC4030_ERROR("(jazz io controller) invalid write of 0x%04x at [" TARGET_FMT_plx "]\n", val, addr);
break;
}
}
static void jazzio_writeb(void *opaque, target_phys_addr_t addr, uint32_t val)
{
uint32_t old_val = jazzio_readw(opaque, addr & ~0x1);
switch (addr & 1) {
case 0:
val = val | (old_val & 0xff00);
break;
case 1:
val = (val << 8) | (old_val & 0x00ff);
break;
}
jazzio_writew(opaque, addr & ~0x1, val);
}
static void jazzio_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
{
jazzio_writew(opaque, addr, val & 0xffff);
jazzio_writew(opaque, addr + 2, (val >> 16) & 0xffff);
}
static CPUReadMemoryFunc *jazzio_read[3] = {
jazzio_readb,
jazzio_readw,
jazzio_readl,
};
static CPUWriteMemoryFunc *jazzio_write[3] = {
jazzio_writeb,
jazzio_writew,
jazzio_writel,
};
static void rc4030_reset(void *opaque)
{
rc4030State *s = opaque;
int i;
s->config = 0x410; /* some boards seem to accept 0x104 too */
s->revision = 1;
s->invalid_address_register = 0;
memset(s->dma_regs, 0, sizeof(s->dma_regs));
s->dma_tl_base = s->dma_tl_limit = 0;
s->remote_failed_address = s->memory_failed_address = 0;
s->cache_maint = 0;
s->cache_ptag = s->cache_ltag = 0;
s->cache_bmask = 0;
s->offset210 = 0x18186;
s->nvram_protect = 7;
for (i = 0; i < 15; i++)
s->rem_speed[i] = 7;
s->imr_jazz = 0x10; /* XXX: required by firmware, but why? */
s->isr_jazz = 0;
s->itr = 0;
qemu_irq_lower(s->timer_irq);
qemu_irq_lower(s->jazz_bus_irq);
}
static int rc4030_load(QEMUFile *f, void *opaque, int version_id)
{
rc4030State* s = opaque;
int i, j;
if (version_id != 2)
return -EINVAL;
s->config = qemu_get_be32(f);
s->invalid_address_register = qemu_get_be32(f);
for (i = 0; i < 8; i++)
for (j = 0; j < 4; j++)
s->dma_regs[i][j] = qemu_get_be32(f);
s->dma_tl_base = qemu_get_be32(f);
s->dma_tl_limit = qemu_get_be32(f);
s->cache_maint = qemu_get_be32(f);
s->remote_failed_address = qemu_get_be32(f);
s->memory_failed_address = qemu_get_be32(f);
s->cache_ptag = qemu_get_be32(f);
s->cache_ltag = qemu_get_be32(f);
s->cache_bmask = qemu_get_be32(f);
s->offset210 = qemu_get_be32(f);
s->nvram_protect = qemu_get_be32(f);
for (i = 0; i < 15; i++)
s->rem_speed[i] = qemu_get_be32(f);
s->imr_jazz = qemu_get_be32(f);
s->isr_jazz = qemu_get_be32(f);
s->itr = qemu_get_be32(f);
set_next_tick(s);
update_jazz_irq(s);
return 0;
}
static void rc4030_save(QEMUFile *f, void *opaque)
{
rc4030State* s = opaque;
int i, j;
qemu_put_be32(f, s->config);
qemu_put_be32(f, s->invalid_address_register);
for (i = 0; i < 8; i++)
for (j = 0; j < 4; j++)
qemu_put_be32(f, s->dma_regs[i][j]);
qemu_put_be32(f, s->dma_tl_base);
qemu_put_be32(f, s->dma_tl_limit);
qemu_put_be32(f, s->cache_maint);
qemu_put_be32(f, s->remote_failed_address);
qemu_put_be32(f, s->memory_failed_address);
qemu_put_be32(f, s->cache_ptag);
qemu_put_be32(f, s->cache_ltag);
qemu_put_be32(f, s->cache_bmask);
qemu_put_be32(f, s->offset210);
qemu_put_be32(f, s->nvram_protect);
for (i = 0; i < 15; i++)
qemu_put_be32(f, s->rem_speed[i]);
qemu_put_be32(f, s->imr_jazz);
qemu_put_be32(f, s->isr_jazz);
qemu_put_be32(f, s->itr);
}
void rc4030_dma_memory_rw(void *opaque, target_phys_addr_t addr, uint8_t *buf, int len, int is_write)
{
rc4030State *s = opaque;
target_phys_addr_t entry_addr;
target_phys_addr_t phys_addr;
dma_pagetable_entry entry;
int index;
int ncpy, i;
i = 0;
for (;;) {
if (i == len) {
break;
}
ncpy = DMA_PAGESIZE - (addr & (DMA_PAGESIZE - 1));
if (ncpy > len - i)
ncpy = len - i;
/* Get DMA translation table entry */
index = addr / DMA_PAGESIZE;
if (index >= s->dma_tl_limit / sizeof(dma_pagetable_entry)) {
break;
}
entry_addr = s->dma_tl_base + index * sizeof(dma_pagetable_entry);
/* XXX: not sure. should we really use only lowest bits? */
entry_addr &= 0x7fffffff;
cpu_physical_memory_rw(entry_addr, (uint8_t *)&entry, sizeof(entry), 0);
/* Read/write data at right place */
phys_addr = entry.frame + (addr & (DMA_PAGESIZE - 1));
cpu_physical_memory_rw(phys_addr, &buf[i], ncpy, is_write);
i += ncpy;
addr += ncpy;
}
}
static void rc4030_do_dma(void *opaque, int n, uint8_t *buf, int len, int is_write)
{
rc4030State *s = opaque;
target_phys_addr_t dma_addr;
int dev_to_mem;
s->dma_regs[n][DMA_REG_ENABLE] &= ~(DMA_FLAG_TC_INTR | DMA_FLAG_MEM_INTR | DMA_FLAG_ADDR_INTR);
/* Check DMA channel consistency */
dev_to_mem = (s->dma_regs[n][DMA_REG_ENABLE] & DMA_FLAG_MEM_TO_DEV) ? 0 : 1;
if (!(s->dma_regs[n][DMA_REG_ENABLE] & DMA_FLAG_ENABLE) ||
(is_write != dev_to_mem)) {
s->dma_regs[n][DMA_REG_ENABLE] |= DMA_FLAG_MEM_INTR;
s->nmi_interrupt |= 1 << n;
return;
}
/* Get start address and len */
if (len > s->dma_regs[n][DMA_REG_COUNT])
len = s->dma_regs[n][DMA_REG_COUNT];
dma_addr = s->dma_regs[n][DMA_REG_ADDRESS];
/* Read/write data at right place */
rc4030_dma_memory_rw(opaque, dma_addr, buf, len, is_write);
s->dma_regs[n][DMA_REG_ENABLE] |= DMA_FLAG_TC_INTR;
s->dma_regs[n][DMA_REG_COUNT] -= len;
#ifdef DEBUG_RC4030_DMA
{
int i, j;
printf("rc4030 dma: Copying %d bytes %s host %p\n",
len, is_write ? "from" : "to", buf);
for (i = 0; i < len; i += 16) {
int n = min(16, len - i);
for (j = 0; j < n; j++)
printf("%02x ", buf[i + j]);
while (j++ < 16)
printf(" ");
printf("| ");
for (j = 0; j < n; j++)
printf("%c", isprint(buf[i + j]) ? buf[i + j] : '.');
printf("\n");
}
}
#endif
}
struct rc4030DMAState {
void *opaque;
int n;
};
void rc4030_dma_read(void *dma, uint8_t *buf, int len)
{
rc4030_dma s = dma;
rc4030_do_dma(s->opaque, s->n, buf, len, 0);
}
void rc4030_dma_write(void *dma, uint8_t *buf, int len)
{
rc4030_dma s = dma;
rc4030_do_dma(s->opaque, s->n, buf, len, 1);
}
static rc4030_dma *rc4030_allocate_dmas(void *opaque, int n)
{
rc4030_dma *s;
struct rc4030DMAState *p;
int i;
s = (rc4030_dma *)qemu_mallocz(sizeof(rc4030_dma) * n);
p = (struct rc4030DMAState *)qemu_mallocz(sizeof(struct rc4030DMAState) * n);
for (i = 0; i < n; i++) {
p->opaque = opaque;
p->n = i;
s[i] = p;
p++;
}
return s;
}
void *rc4030_init(qemu_irq timer, qemu_irq jazz_bus,
qemu_irq **irqs, rc4030_dma **dmas)
{
rc4030State *s;
int s_chipset, s_jazzio;
s = qemu_mallocz(sizeof(rc4030State));
*irqs = qemu_allocate_irqs(rc4030_irq_jazz_request, s, 16);
*dmas = rc4030_allocate_dmas(s, 4);
s->periodic_timer = qemu_new_timer(vm_clock, rc4030_periodic_timer, s);
s->timer_irq = timer;
s->jazz_bus_irq = jazz_bus;
qemu_register_reset(rc4030_reset, 0, s);
register_savevm("rc4030", 0, 2, rc4030_save, rc4030_load, s);
rc4030_reset(s);
s_chipset = cpu_register_io_memory(0, rc4030_read, rc4030_write, s);
cpu_register_physical_memory(0x80000000, 0x300, s_chipset);
s_jazzio = cpu_register_io_memory(0, jazzio_read, jazzio_write, s);
cpu_register_physical_memory(0xf0000000, 0x00001000, s_jazzio);
return s;
}
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