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qemu/hw/rc4030.c

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/*
* QEMU JAZZ RC4030 chipset
*
* Copyright (c) 2007-2008 Hervé 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 "qemu-timer.h"
//#define DEBUG_RC4030
#ifdef DEBUG_RC4030
static const char* irq_names[] = { "parallel", "floppy", "sound", "video",
"network", "scsi", "keyboard", "mouse", "serial0", "serial1" };
#endif
typedef struct rc4030State
{
uint32_t config; /* 0x0000: RC4030 config 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 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 cache_bwin; /* 0x0060: I/O Cache Buffer Window */
uint32_t offset208;
uint32_t offset210;
uint32_t nvram_protect; /* 0x0220: NV ram protect register */
uint32_t offset238;
uint32_t rem_speed[15];
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 */
uint32_t dummy32;
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;
/* 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:
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 0x1e8:
case 0x01f0:
case 0x01f8:
{
int entry = (addr - 0x0100) >> 5;
int idx = (addr & 0x1f) >> 3;
val = s->dma_regs[entry][idx];
}
break;
/* Offset 0x0208 */
case 0x0208:
val = s->offset208;
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 = s->dummy32;
qemu_irq_lower(s->timer_irq);
break;
/* Offset 0x0238 */
case 0x0238:
val = s->offset238;
break;
default:
#ifdef DEBUG_RC4030
printf("rc4030: invalid read [" TARGET_FMT_lx "]\n", addr);
#endif
val = 0;
break;
}
#ifdef DEBUG_RC4030
if ((addr & ~3) != 0x230)
printf("rc4030: read 0x%02x at " TARGET_FMT_lx "\n", val, addr);
#endif
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;
#ifdef DEBUG_RC4030
printf("rc4030: write 0x%02x at " TARGET_FMT_lx "\n", val, addr);
#endif
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;
/* 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:
s->cache_bwin = val;
/* HACK */
if (s->cache_ltag == 0x80000001 && s->cache_bmask == 0xf0f0f0f) {
target_phys_addr_t dests[] = { 4, 0, 8, 0x10 };
static int current = 0;
target_phys_addr_t dest = 0 + dests[current];
uint8_t buf;
current = (current + 1) % (sizeof(dests)/sizeof(dests[0]));
buf = s->cache_bwin - 1;
cpu_physical_memory_rw(dest, &buf, 1, 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:
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 0x1e8:
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;
default:
#ifdef DEBUG_RC4030
printf("rc4030: invalid write of 0x%02x at [" TARGET_FMT_lx "]\n", val, addr);
#endif
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;
printf("jazz pending:");
for (irq = 0; irq < sizeof(irq_names)/sizeof(irq_names[0]); 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 int_readb(void *opaque, target_phys_addr_t addr)
{
rc4030State *s = opaque;
uint32_t val;
uint32_t irq;
addr &= 0xfff;
switch (addr) {
case 0x00: {
/* Local bus int source */
uint32_t pending = s->isr_jazz & s->imr_jazz;
val = 0;
irq = 0;
while (pending) {
if (pending & 1) {
//printf("returning irq %s\n", irq_names[irq]);
val = (irq + 1) << 2;
break;
}
irq++;
pending >>= 1;
}
break;
}
default:
#ifdef DEBUG_RC4030
printf("rc4030: (interrupt controller) invalid read [" TARGET_FMT_lx "]\n", addr);
#endif
val = 0;
}
#ifdef DEBUG_RC4030
printf("rc4030: (interrupt controller) read 0x%02x at " TARGET_FMT_lx "\n", val, addr);
#endif
return val;
}
static uint32_t int_readw(void *opaque, target_phys_addr_t addr)
{
uint32_t v;
v = int_readb(opaque, addr);
v |= int_readb(opaque, addr + 1) << 8;
return v;
}
static uint32_t int_readl(void *opaque, target_phys_addr_t addr)
{
uint32_t v;
v = int_readb(opaque, addr);
v |= int_readb(opaque, addr + 1) << 8;
v |= int_readb(opaque, addr + 2) << 16;
v |= int_readb(opaque, addr + 3) << 24;
return v;
}
static void int_writeb(void *opaque, target_phys_addr_t addr, uint32_t val)
{
rc4030State *s = opaque;
addr &= 0xfff;
#ifdef DEBUG_RC4030
printf("rc4030: (interrupt controller) write 0x%02x at " TARGET_FMT_lx "\n", val, addr);
#endif
switch (addr) {
/* Local bus int enable mask */
case 0x02:
s->imr_jazz = (s->imr_jazz & 0xff00) | (val << 0); update_jazz_irq(s);
break;
case 0x03:
s->imr_jazz = (s->imr_jazz & 0x00ff) | (val << 8); update_jazz_irq(s);
break;
default:
#ifdef DEBUG_RC4030
printf("rc4030: (interrupt controller) invalid write of 0x%02x at [" TARGET_FMT_lx "]\n", val, addr);
#endif
break;
}
}
static void int_writew(void *opaque, target_phys_addr_t addr, uint32_t val)
{
int_writeb(opaque, addr, val & 0xff);
int_writeb(opaque, addr + 1, (val >> 8) & 0xff);
}
static void int_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
{
int_writeb(opaque, addr, val & 0xff);
int_writeb(opaque, addr + 1, (val >> 8) & 0xff);
int_writeb(opaque, addr + 2, (val >> 16) & 0xff);
int_writeb(opaque, addr + 3, (val >> 24) & 0xff);
}
static CPUReadMemoryFunc *int_read[3] = {
int_readb,
int_readw,
int_readl,
};
static CPUWriteMemoryFunc *int_write[3] = {
int_writeb,
int_writew,
int_writel,
};
#define G364_512KB_RAM (0x0)
#define G364_2MB_RAM (0x1)
#define G364_8MB_RAM (0x2)
#define G364_32MB_RAM (0x3)
static void rc4030_reset(void *opaque)
{
rc4030State *s = opaque;
int i;
s->config = (G364_2MB_RAM << 8) | 0x04;
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_ptag = s->cache_ltag = 0;
s->cache_bmask = s->cache_bwin = 0;
s->offset208 = 0;
s->offset210 = 0x18186;
s->nvram_protect = 7;
s->offset238 = 7;
for (i = 0; i < 15; i++)
s->rem_speed[i] = 7;
s->imr_jazz = s->isr_jazz = 0;
s->itr = 0;
s->dummy32 = 0;
qemu_irq_lower(s->timer_irq);
qemu_irq_lower(s->jazz_bus_irq);
}
qemu_irq *rc4030_init(qemu_irq timer, qemu_irq jazz_bus)
{
rc4030State *s;
int s_chipset, s_int;
s = qemu_mallocz(sizeof(rc4030State));
if (!s)
return NULL;
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, 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_int = cpu_register_io_memory(0, int_read, int_write, s);
cpu_register_physical_memory(0xf0000000, 0x00001000, s_int);
return qemu_allocate_irqs(rc4030_irq_jazz_request, s, 16);
}
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