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.
20 #ifdef TARGET_WORDS_BIGENDIAN
21 #define BIOS_FILENAME "mips_bios.bin"
23 #define BIOS_FILENAME "mipsel_bios.bin"
26 #define PHYS_TO_VIRT(x) ((x) | ~(target_ulong)0x7fffffff)
28 #define VIRT_TO_PHYS_ADDEND (-((int64_t)(int32_t)0x80000000))
32 static const int ide_iobase[2] = { 0x1f0, 0x170 };
33 static const int ide_iobase2[2] = { 0x3f6, 0x376 };
34 static const int ide_irq[2] = { 14, 15 };
36 static int serial_io[MAX_SERIAL_PORTS] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8 };
37 static int serial_irq[MAX_SERIAL_PORTS] = { 4, 3, 4, 3 };
39 static PITState *pit; /* PIT i8254 */
41 /* i8254 PIT is attached to the IRQ0 at PIC i8259 */
43 static struct _loaderparams {
45 const char *kernel_filename;
46 const char *kernel_cmdline;
47 const char *initrd_filename;
50 static void mips_qemu_writel (void *opaque, target_phys_addr_t addr,
53 if ((addr & 0xffff) == 0 && val == 42)
54 qemu_system_reset_request ();
55 else if ((addr & 0xffff) == 4 && val == 42)
56 qemu_system_shutdown_request ();
59 static uint32_t mips_qemu_readl (void *opaque, target_phys_addr_t addr)
64 static CPUWriteMemoryFunc *mips_qemu_write[] = {
70 static CPUReadMemoryFunc *mips_qemu_read[] = {
76 static int mips_qemu_iomemtype = 0;
78 static void load_kernel (CPUState *env)
80 int64_t entry, kernel_low, kernel_high;
81 long kernel_size, initrd_size;
82 ram_addr_t initrd_offset;
84 kernel_size = load_elf(loaderparams.kernel_filename, VIRT_TO_PHYS_ADDEND,
85 (uint64_t *)&entry, (uint64_t *)&kernel_low,
86 (uint64_t *)&kernel_high);
87 if (kernel_size >= 0) {
88 if ((entry & ~0x7fffffffULL) == 0x80000000)
89 entry = (int32_t)entry;
90 env->active_tc.PC = entry;
92 fprintf(stderr, "qemu: could not load kernel '%s'\n",
93 loaderparams.kernel_filename);
100 if (loaderparams.initrd_filename) {
101 initrd_size = get_image_size (loaderparams.initrd_filename);
102 if (initrd_size > 0) {
103 initrd_offset = (kernel_high + ~TARGET_PAGE_MASK) & TARGET_PAGE_MASK;
104 if (initrd_offset + initrd_size > ram_size) {
106 "qemu: memory too small for initial ram disk '%s'\n",
107 loaderparams.initrd_filename);
110 initrd_size = load_image_targphys(loaderparams.initrd_filename,
112 ram_size - initrd_offset);
114 if (initrd_size == (target_ulong) -1) {
115 fprintf(stderr, "qemu: could not load initial ram disk '%s'\n",
116 loaderparams.initrd_filename);
121 /* Store command line. */
122 if (initrd_size > 0) {
124 ret = sprintf((char *)(phys_ram_base + (16 << 20) - 256),
125 "rd_start=0x" TARGET_FMT_lx " rd_size=%li ",
126 PHYS_TO_VIRT((uint32_t)initrd_offset),
128 strcpy ((char *)(phys_ram_base + (16 << 20) - 256 + ret),
129 loaderparams.kernel_cmdline);
132 strcpy ((char *)(phys_ram_base + (16 << 20) - 256),
133 loaderparams.kernel_cmdline);
136 *(int32_t *)(phys_ram_base + (16 << 20) - 260) = tswap32 (0x12345678);
137 *(int32_t *)(phys_ram_base + (16 << 20) - 264) = tswap32 (ram_size);
140 static void main_cpu_reset(void *opaque)
142 CPUState *env = opaque;
145 if (loaderparams.kernel_filename)
149 static const int sector_len = 32 * 1024;
151 void mips_r4k_init (ram_addr_t ram_size, int vga_ram_size,
152 const char *boot_device,
153 const char *kernel_filename, const char *kernel_cmdline,
154 const char *initrd_filename, const char *cpu_model)
157 ram_addr_t ram_offset;
158 ram_addr_t bios_offset;
165 BlockDriverState *hd[MAX_IDE_BUS * MAX_IDE_DEVS];
168 if (cpu_model == NULL) {
175 env = cpu_init(cpu_model);
177 fprintf(stderr, "Unable to find CPU definition\n");
180 qemu_register_reset(main_cpu_reset, env);
183 if (ram_size > (256 << 20)) {
185 "qemu: Too much memory for this machine: %d MB, maximum 256 MB\n",
186 ((unsigned int)ram_size / (1 << 20)));
189 ram_offset = qemu_ram_alloc(ram_size);
191 cpu_register_physical_memory(0, ram_size, ram_offset | IO_MEM_RAM);
193 if (!mips_qemu_iomemtype) {
194 mips_qemu_iomemtype = cpu_register_io_memory(0, mips_qemu_read,
195 mips_qemu_write, NULL);
197 cpu_register_physical_memory(0x1fbf0000, 0x10000, mips_qemu_iomemtype);
199 /* Try to load a BIOS image. If this fails, we continue regardless,
200 but initialize the hardware ourselves. When a kernel gets
201 preloaded we also initialize the hardware, since the BIOS wasn't
203 if (bios_name == NULL)
204 bios_name = BIOS_FILENAME;
205 snprintf(buf, sizeof(buf), "%s/%s", bios_dir, bios_name);
206 bios_size = get_image_size(buf);
207 if ((bios_size > 0) && (bios_size <= BIOS_SIZE)) {
208 bios_offset = qemu_ram_alloc(BIOS_SIZE);
209 cpu_register_physical_memory(0x1fc00000, BIOS_SIZE,
210 bios_offset | IO_MEM_ROM);
212 load_image_targphys(buf, 0x1fc00000, BIOS_SIZE);
213 } else if ((index = drive_get_index(IF_PFLASH, 0, 0)) > -1) {
214 uint32_t mips_rom = 0x00400000;
215 bios_offset = qemu_ram_alloc(mips_rom);
216 if (!pflash_cfi01_register(0x1fc00000, bios_offset,
217 drives_table[index].bdrv, sector_len, mips_rom / sector_len,
219 fprintf(stderr, "qemu: Error registering flash memory.\n");
224 fprintf(stderr, "qemu: Warning, could not load MIPS bios '%s'\n",
228 if (kernel_filename) {
229 loaderparams.ram_size = ram_size;
230 loaderparams.kernel_filename = kernel_filename;
231 loaderparams.kernel_cmdline = kernel_cmdline;
232 loaderparams.initrd_filename = initrd_filename;
236 /* Init CPU internal devices */
237 cpu_mips_irq_init_cpu(env);
238 cpu_mips_clock_init(env);
240 /* The PIC is attached to the MIPS CPU INT0 pin */
241 i8259 = i8259_init(env->irq[2]);
243 rtc_state = rtc_init(0x70, i8259[8], 2000);
245 /* Register 64 KB of ISA IO space at 0x14000000 */
246 isa_mmio_init(0x14000000, 0x00010000);
247 isa_mem_base = 0x10000000;
249 pit = pit_init(0x40, i8259[0]);
251 for(i = 0; i < MAX_SERIAL_PORTS; i++) {
253 serial_init(serial_io[i], i8259[serial_irq[i]], 115200,
258 isa_vga_init(vga_ram_size);
260 if (nd_table[0].vlan)
261 isa_ne2000_init(0x300, i8259[9], &nd_table[0]);
263 if (drive_get_max_bus(IF_IDE) >= MAX_IDE_BUS) {
264 fprintf(stderr, "qemu: too many IDE bus\n");
268 for(i = 0; i < MAX_IDE_BUS * MAX_IDE_DEVS; i++) {
269 index = drive_get_index(IF_IDE, i / MAX_IDE_DEVS, i % MAX_IDE_DEVS);
271 hd[i] = drives_table[index].bdrv;
276 for(i = 0; i < MAX_IDE_BUS; i++)
277 isa_ide_init(ide_iobase[i], ide_iobase2[i], i8259[ide_irq[i]],
278 hd[MAX_IDE_DEVS * i],
279 hd[MAX_IDE_DEVS * i + 1]);
281 i8042_init(i8259[1], i8259[12], 0x60);
284 QEMUMachine mips_machine = {
286 .desc = "mips r4k platform",
287 .init = mips_r4k_init,
288 .ram_require = VGA_RAM_SIZE + BIOS_SIZE,