MIPS Magnum R4000 machine

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4164 c046a42c-6fe2-441c-8c8c-71466251a162

4 files changed, 894 insertions, 0 deletions

diff --git a/hw/boards.h b/hw/boards.h
index affcaa6..509bdea 100644
--- a/hw/boards.h
+++ b/hw/boards.h
@@ -36,6 +36,9 @@ extern QEMUMachine taihu_machine;
 /* mips_r4k.c */
 extern QEMUMachine mips_machine;
 
+/* mips_jazz.c */
+extern QEMUMachine mips_magnum_machine;
+
 /* mips_malta.c */
 extern QEMUMachine mips_malta_machine;
 
diff --git a/hw/mips.h b/hw/mips.h
index f4599a4..382ea84 100644
--- a/hw/mips.h
+++ b/hw/mips.h
@@ -9,6 +9,11 @@ PCIBus *pci_gt64120_init(qemu_irq *pic);
 void *ds1225y_init(target_phys_addr_t mem_base, const char *filename);
 void ds1225y_set_protection(void *opaque, int protection);
 
+/* g364fb.c */
+int g364fb_mm_init(DisplayState *ds,
+                   int vram_size, int it_shift,
+                   target_phys_addr_t vram_base, target_phys_addr_t ctrl_base);
+
 /* mipsnet.c */
 void mipsnet_init(int base, qemu_irq irq, NICInfo *nd);
 
@@ -22,4 +27,7 @@ extern void cpu_mips_irq_init_cpu(CPUState *env);
 extern void cpu_mips_clock_init(CPUState *);
 extern void cpu_mips_irqctrl_init (void);
 
+/* rc4030.c */
+qemu_irq *rc4030_init(qemu_irq timer, qemu_irq jazz_bus);
+
 #endif
diff --git a/hw/mips_jazz.c b/hw/mips_jazz.c
new file mode 100644
index 0000000..910ddb9
--- /dev/null
+++ b/hw/mips_jazz.c
@@ -0,0 +1,275 @@
+/*
+ * QEMU MIPS Jazz support
+ *
+ * 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 "mips.h"
+#include "pc.h"
+#include "isa.h"
+#include "fdc.h"
+#include "sysemu.h"
+#include "audio/audio.h"
+#include "boards.h"
+#include "net.h"
+#include "scsi.h"
+
+extern int nographic;
+
+#ifdef TARGET_WORDS_BIGENDIAN
+#define BIOS_FILENAME "mips_bios.bin"
+#else
+#define BIOS_FILENAME "mipsel_bios.bin"
+#endif
+
+#ifdef TARGET_MIPS64
+#define PHYS_TO_VIRT(x) ((x) | ~0x7fffffffULL)
+#else
+#define PHYS_TO_VIRT(x) ((x) | ~0x7fffffffU)
+#endif
+#define VIRT_TO_PHYS_ADDEND (-((int64_t)(int32_t)0x80000000))
+
+enum jazz_model_e
+{
+    JAZZ_MAGNUM,
+};
+
+static void main_cpu_reset(void *opaque)
+{
+    CPUState *env = opaque;
+    cpu_reset(env);
+}
+
+static uint32_t rtc_readb(void *opaque, target_phys_addr_t addr)
+{
+    CPUState *env = opaque;
+    return cpu_inw(env, 0x71);
+}
+
+static void rtc_writeb(void *opaque, target_phys_addr_t addr, uint32_t val)
+{
+    CPUState *env = opaque;
+    cpu_outw(env, 0x71, val & 0xff);
+}
+
+static CPUReadMemoryFunc *rtc_read[3] = {
+    rtc_readb,
+    rtc_readb,
+    rtc_readb,
+};
+
+static CPUWriteMemoryFunc *rtc_write[3] = {
+    rtc_writeb,
+    rtc_writeb,
+    rtc_writeb,
+};
+
+#ifdef HAS_AUDIO
+static void audio_init(qemu_irq *pic)
+{
+    struct soundhw *c;
+    int audio_enabled = 0;
+
+    for (c = soundhw; !audio_enabled && c->name; ++c) {
+        audio_enabled = c->enabled;
+    }
+
+    if (audio_enabled) {
+        AudioState *s;
+
+        s = AUD_init();
+        if (s) {
+            for (c = soundhw; c->name; ++c) {
+                if (c->enabled) {
+                    if (c->isa) {
+                        c->init.init_isa(s, pic);
+                    }
+                }
+            }
+        }
+    }
+}
+#endif
+
+void espdma_memory_read(void *opaque, uint8_t *buf, int len)
+{
+    printf("espdma_memory_read(buf %p, len %d) not implemented\n", buf, len);
+}
+
+void espdma_memory_write(void *opaque, uint8_t *buf, int len)
+{
+    printf("espdma_memory_write(buf %p, len %d) not implemented\n", buf, len);
+}
+
+#define MAGNUM_BIOS_SIZE_MAX 0x7e000
+#define MAGNUM_BIOS_SIZE (BIOS_SIZE < MAGNUM_BIOS_SIZE_MAX ? BIOS_SIZE : MAGNUM_BIOS_SIZE_MAX)
+
+static
+void mips_jazz_init (int ram_size, int vga_ram_size,
+                     DisplayState *ds, const char *cpu_model,
+                     enum jazz_model_e jazz_model)
+{
+    char buf[1024];
+    unsigned long bios_offset;
+    int bios_size, n;
+    CPUState *env;
+    qemu_irq *rc4030, *i8259;
+    void *scsi_hba;
+    int hd;
+    int s_rtc;
+    PITState *pit;
+    BlockDriverState *fds[MAX_FD];
+    qemu_irq esp_reset;
+
+    /* init CPUs */
+    if (cpu_model == NULL) {
+#ifdef TARGET_MIPS64
+        cpu_model = "R4000";
+#else
+        /* FIXME: All wrong, this maybe should be R3000 for the older JAZZs. */
+        cpu_model = "24Kf";
+#endif
+    }
+    env = cpu_init(cpu_model);
+    if (!env) {
+        fprintf(stderr, "Unable to find CPU definition\n");
+        exit(1);
+    }
+    register_savevm("cpu", 0, 3, cpu_save, cpu_load, env);
+    qemu_register_reset(main_cpu_reset, env);
+
+    /* allocate RAM */
+    cpu_register_physical_memory(0, ram_size, IO_MEM_RAM);
+
+    /* load the BIOS image. */
+    bios_offset = ram_size + vga_ram_size;
+    snprintf(buf, sizeof(buf), "%s/%s", bios_dir, BIOS_FILENAME);
+    bios_size = load_image(buf, phys_ram_base + bios_offset);
+    if (bios_size < 0 || bios_size > MAGNUM_BIOS_SIZE) {
+        fprintf(stderr, "qemu: Could not load MIPS bios '%s'\n",
+                buf);
+        exit(1);
+    }
+
+    cpu_register_physical_memory(0x1fc00000LL,
+                                 MAGNUM_BIOS_SIZE, bios_offset | IO_MEM_ROM);
+    cpu_register_physical_memory(0xfff00000LL,
+                                 MAGNUM_BIOS_SIZE, bios_offset | IO_MEM_ROM);
+
+    /* Init CPU internal devices */
+    cpu_mips_irq_init_cpu(env);
+    cpu_mips_clock_init(env);
+
+    /* Chipset */
+    rc4030 = rc4030_init(env->irq[6], env->irq[3]);
+
+    /* ISA devices */
+    i8259 = i8259_init(env->irq[4]);
+    pit = pit_init(0x40, i8259[0]);
+    pcspk_init(pit);
+
+    /* ISA IO space at 0x90000000 */
+    isa_mmio_init(0x90000000, 0x01000000);
+    isa_mem_base = 0x11000000;
+
+    /* Video card */
+    switch (jazz_model) {
+    case JAZZ_MAGNUM:
+        g364fb_mm_init(ds, vga_ram_size, 0, 0x40000000, 0x60000000);
+        break;
+    default:
+        break;
+    }
+
+    /* Network controller */
+    /* FIXME: missing NS SONIC DP83932 */
+
+    /* SCSI adapter */
+    scsi_hba = esp_init(0x80002000,
+                        espdma_memory_read, espdma_memory_write, NULL,
+                        rc4030[5], &esp_reset);
+    for (n = 0; n < ESP_MAX_DEVS; n++) {
+        hd = drive_get_index(IF_SCSI, 0, n);
+        if (hd != -1) {
+            esp_scsi_attach(scsi_hba, drives_table[hd].bdrv, n);
+        }
+    }
+
+    /* Floppy */
+    if (drive_get_max_bus(IF_FLOPPY) >= MAX_FD) {
+        fprintf(stderr, "qemu: too many floppy drives\n");
+        exit(1);
+    }
+    for (n = 0; n < MAX_FD; n++) {
+        int fd = drive_get_index(IF_FLOPPY, 0, n);
+        if (fd != -1)
+            fds[n] = drives_table[fd].bdrv;
+        else
+            fds[n] = NULL;
+    }
+    fdctrl_init(rc4030[1], 0, 1, 0x80003000, fds);
+
+    /* Real time clock */
+    rtc_init(0x70, i8259[8]);
+    s_rtc = cpu_register_io_memory(0, rtc_read, rtc_write, env);
+    cpu_register_physical_memory(0x80004000, 0x00001000, s_rtc);
+
+    /* Keyboard (i8042) */
+    i8042_mm_init(rc4030[6], rc4030[7], 0x80005000, 0);
+
+    /* Serial ports */
+    if (serial_hds[0])
+        serial_mm_init(0x80006000, 0, rc4030[8], serial_hds[0], 1);
+    if (serial_hds[1])
+        serial_mm_init(0x80007000, 0, rc4030[9], serial_hds[1], 1);
+
+    /* Parallel port */
+    if (parallel_hds[0])
+        parallel_mm_init(0x80008000, 0, rc4030[0], parallel_hds[0]);
+
+    /* Sound card */
+    /* FIXME: missing Jazz sound at 0x8000c000, rc4030[2] */
+#ifdef HAS_AUDIO
+    audio_init(i8259);
+#endif
+
+    /* NVRAM: Unprotected at 0x9000, Protected at 0xa000, Read only at 0xb000 */
+    ds1225y_init(0x80009000, "nvram");
+
+    /* LED indicator */
+    jazz_led_init(ds, 0x8000f000);
+}
+
+static
+void mips_magnum_init (int ram_size, int vga_ram_size,
+                       const char *boot_device, DisplayState *ds,
+                       const char *kernel_filename, const char *kernel_cmdline,
+                       const char *initrd_filename, const char *cpu_model)
+{
+    mips_jazz_init(ram_size, vga_ram_size, ds, cpu_model, JAZZ_MAGNUM);
+}
+
+QEMUMachine mips_magnum_machine = {
+    "magnum",
+    "MIPS Magnum",
+    mips_magnum_init,
+};
diff --git a/hw/rc4030.c b/hw/rc4030.c
new file mode 100644
index 0000000..bf440db
--- /dev/null
+++ b/hw/rc4030.c
@@ -0,0 +1,608 @@
+/*
+ * 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 hz;
+
+    hz = 1000 / (s->itr + 1);
+
+    qemu_mod_timer(s->periodic_timer, qemu_get_clock(vm_clock) + ticks_per_sec / 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);
+}