2 * QEMU/MIPS pseudo-board
4 * emulates a simple machine with ISA-like bus.
5 * ISA IO space mapped to the 0x14000000 (PHYS) and
6 * ISA memory at the 0x10000000 (PHYS, 16Mb in size).
7 * All peripherial devices are attached to this "bus" with
8 * the standard PC ISA addresses.
12 #ifdef TARGET_WORDS_BIGENDIAN
13 #define BIOS_FILENAME "mips_bios.bin"
15 #define BIOS_FILENAME "mipsel_bios.bin"
19 #define PHYS_TO_VIRT(x) ((x) | ~0x7fffffffULL)
21 #define PHYS_TO_VIRT(x) ((x) | ~0x7fffffffU)
24 #define VIRT_TO_PHYS_ADDEND (-((int64_t)(int32_t)0x80000000))
26 static const int ide_iobase[2] = { 0x1f0, 0x170 };
27 static const int ide_iobase2[2] = { 0x3f6, 0x376 };
28 static const int ide_irq[2] = { 14, 15 };
30 static int serial_io[MAX_SERIAL_PORTS] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8 };
31 static int serial_irq[MAX_SERIAL_PORTS] = { 4, 3, 4, 3 };
35 static PITState *pit; /* PIT i8254 */
37 /*i8254 PIT is attached to the IRQ0 at PIC i8259 */
39 static struct _loaderparams {
41 const char *kernel_filename;
42 const char *kernel_cmdline;
43 const char *initrd_filename;
46 static void mips_qemu_writel (void *opaque, target_phys_addr_t addr,
49 if ((addr & 0xffff) == 0 && val == 42)
50 qemu_system_reset_request ();
51 else if ((addr & 0xffff) == 4 && val == 42)
52 qemu_system_shutdown_request ();
55 static uint32_t mips_qemu_readl (void *opaque, target_phys_addr_t addr)
60 static CPUWriteMemoryFunc *mips_qemu_write[] = {
66 static CPUReadMemoryFunc *mips_qemu_read[] = {
72 static int mips_qemu_iomemtype = 0;
74 static void load_kernel (CPUState *env)
76 int64_t entry, kernel_low, kernel_high;
77 long kernel_size, initrd_size;
78 ram_addr_t initrd_offset;
80 kernel_size = load_elf(loaderparams.kernel_filename, VIRT_TO_PHYS_ADDEND,
81 &entry, &kernel_low, &kernel_high);
82 if (kernel_size >= 0) {
83 if ((entry & ~0x7fffffffULL) == 0x80000000)
84 entry = (int32_t)entry;
85 env->PC[env->current_tc] = entry;
87 fprintf(stderr, "qemu: could not load kernel '%s'\n",
88 loaderparams.kernel_filename);
95 if (loaderparams.initrd_filename) {
96 initrd_size = get_image_size (loaderparams.initrd_filename);
97 if (initrd_size > 0) {
98 initrd_offset = (kernel_high + ~TARGET_PAGE_MASK) & TARGET_PAGE_MASK;
99 if (initrd_offset + initrd_size > ram_size) {
101 "qemu: memory too small for initial ram disk '%s'\n",
102 loaderparams.initrd_filename);
105 initrd_size = load_image(loaderparams.initrd_filename,
106 phys_ram_base + initrd_offset);
108 if (initrd_size == (target_ulong) -1) {
109 fprintf(stderr, "qemu: could not load initial ram disk '%s'\n",
110 loaderparams.initrd_filename);
115 /* Store command line. */
116 if (initrd_size > 0) {
118 ret = sprintf(phys_ram_base + (16 << 20) - 256,
119 "rd_start=0x" TARGET_FMT_lx " rd_size=%li ",
120 PHYS_TO_VIRT((uint32_t)initrd_offset),
122 strcpy (phys_ram_base + (16 << 20) - 256 + ret,
123 loaderparams.kernel_cmdline);
126 strcpy (phys_ram_base + (16 << 20) - 256,
127 loaderparams.kernel_cmdline);
130 *(int32_t *)(phys_ram_base + (16 << 20) - 260) = tswap32 (0x12345678);
131 *(int32_t *)(phys_ram_base + (16 << 20) - 264) = tswap32 (ram_size);
134 static void main_cpu_reset(void *opaque)
136 CPUState *env = opaque;
138 cpu_mips_register(env, NULL);
140 if (loaderparams.kernel_filename)
145 void mips_r4k_init (int ram_size, int vga_ram_size, const char *boot_device,
146 DisplayState *ds, const char **fd_filename, int snapshot,
147 const char *kernel_filename, const char *kernel_cmdline,
148 const char *initrd_filename, const char *cpu_model)
151 unsigned long bios_offset;
160 if (cpu_model == NULL) {
167 if (mips_find_by_name(cpu_model, &def) != 0)
170 cpu_mips_register(env, def);
171 register_savevm("cpu", 0, 3, cpu_save, cpu_load, env);
172 qemu_register_reset(main_cpu_reset, env);
175 cpu_register_physical_memory(0, ram_size, IO_MEM_RAM);
177 if (!mips_qemu_iomemtype) {
178 mips_qemu_iomemtype = cpu_register_io_memory(0, mips_qemu_read,
179 mips_qemu_write, NULL);
181 cpu_register_physical_memory(0x1fbf0000, 0x10000, mips_qemu_iomemtype);
183 /* Try to load a BIOS image. If this fails, we continue regardless,
184 but initialize the hardware ourselves. When a kernel gets
185 preloaded we also initialize the hardware, since the BIOS wasn't
187 bios_offset = ram_size + vga_ram_size;
188 if (bios_name == NULL)
189 bios_name = BIOS_FILENAME;
190 snprintf(buf, sizeof(buf), "%s/%s", bios_dir, bios_name);
191 bios_size = load_image(buf, phys_ram_base + bios_offset);
192 if ((bios_size > 0) && (bios_size <= BIOS_SIZE)) {
193 cpu_register_physical_memory(0x1fc00000,
194 BIOS_SIZE, bios_offset | IO_MEM_ROM);
197 fprintf(stderr, "qemu: Warning, could not load MIPS bios '%s'\n",
201 if (kernel_filename) {
202 loaderparams.ram_size = ram_size;
203 loaderparams.kernel_filename = kernel_filename;
204 loaderparams.kernel_cmdline = kernel_cmdline;
205 loaderparams.initrd_filename = initrd_filename;
209 /* Init CPU internal devices */
210 cpu_mips_irq_init_cpu(env);
211 cpu_mips_clock_init(env);
212 cpu_mips_irqctrl_init();
214 /* The PIC is attached to the MIPS CPU INT0 pin */
215 i8259 = i8259_init(env->irq[2]);
217 rtc_state = rtc_init(0x70, i8259[8]);
219 /* Register 64 KB of ISA IO space at 0x14000000 */
220 isa_mmio_init(0x14000000, 0x00010000);
221 isa_mem_base = 0x10000000;
223 pit = pit_init(0x40, i8259[0]);
225 for(i = 0; i < MAX_SERIAL_PORTS; i++) {
227 serial_init(serial_io[i], i8259[serial_irq[i]], serial_hds[i]);
231 isa_vga_init(ds, phys_ram_base + ram_size, ram_size,
234 if (nd_table[0].vlan) {
235 if (nd_table[0].model == NULL
236 || strcmp(nd_table[0].model, "ne2k_isa") == 0) {
237 isa_ne2000_init(0x300, i8259[9], &nd_table[0]);
238 } else if (strcmp(nd_table[0].model, "?") == 0) {
239 fprintf(stderr, "qemu: Supported NICs: ne2k_isa\n");
242 fprintf(stderr, "qemu: Unsupported NIC: %s\n", nd_table[0].model);
247 for(i = 0; i < 2; i++)
248 isa_ide_init(ide_iobase[i], ide_iobase2[i], i8259[ide_irq[i]],
249 bs_table[2 * i], bs_table[2 * i + 1]);
251 i8042_init(i8259[1], i8259[12], 0x60);
252 ds1225y_init(0x9000, "nvram");
255 QEMUMachine mips_machine = {