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 #include "mips_cpudevs.h"
20 #include "mips-bios.h"
27 static const int ide_iobase[2] = { 0x1f0, 0x170 };
28 static const int ide_iobase2[2] = { 0x3f6, 0x376 };
29 static const int ide_irq[2] = { 14, 15 };
31 static PITState *pit; /* PIT i8254 */
33 /* i8254 PIT is attached to the IRQ0 at PIC i8259 */
35 static struct _loaderparams {
37 const char *kernel_filename;
38 const char *kernel_cmdline;
39 const char *initrd_filename;
42 static void mips_qemu_writel (void *opaque, target_phys_addr_t addr,
45 if ((addr & 0xffff) == 0 && val == 42)
46 qemu_system_reset_request ();
47 else if ((addr & 0xffff) == 4 && val == 42)
48 qemu_system_shutdown_request ();
51 static uint32_t mips_qemu_readl (void *opaque, target_phys_addr_t addr)
56 static CPUWriteMemoryFunc * const mips_qemu_write[] = {
62 static CPUReadMemoryFunc * const mips_qemu_read[] = {
68 static int mips_qemu_iomemtype = 0;
70 typedef struct ResetData {
75 static int64_t load_kernel(void)
77 int64_t entry, kernel_high;
78 long kernel_size, initrd_size, params_size;
79 ram_addr_t initrd_offset;
83 #ifdef TARGET_WORDS_BIGENDIAN
88 kernel_size = load_elf(loaderparams.kernel_filename, cpu_mips_kseg0_to_phys,
89 NULL, (uint64_t *)&entry, NULL,
90 (uint64_t *)&kernel_high, big_endian,
92 if (kernel_size >= 0) {
93 if ((entry & ~0x7fffffffULL) == 0x80000000)
94 entry = (int32_t)entry;
96 fprintf(stderr, "qemu: could not load kernel '%s'\n",
97 loaderparams.kernel_filename);
104 if (loaderparams.initrd_filename) {
105 initrd_size = get_image_size (loaderparams.initrd_filename);
106 if (initrd_size > 0) {
107 initrd_offset = (kernel_high + ~TARGET_PAGE_MASK) & TARGET_PAGE_MASK;
108 if (initrd_offset + initrd_size > ram_size) {
110 "qemu: memory too small for initial ram disk '%s'\n",
111 loaderparams.initrd_filename);
114 initrd_size = load_image_targphys(loaderparams.initrd_filename,
116 ram_size - initrd_offset);
118 if (initrd_size == (target_ulong) -1) {
119 fprintf(stderr, "qemu: could not load initial ram disk '%s'\n",
120 loaderparams.initrd_filename);
125 /* Store command line. */
127 params_buf = qemu_malloc(params_size);
129 params_buf[0] = tswap32(ram_size);
130 params_buf[1] = tswap32(0x12345678);
132 if (initrd_size > 0) {
133 snprintf((char *)params_buf + 8, 256, "rd_start=0x%" PRIx64 " rd_size=%li %s",
134 cpu_mips_phys_to_kseg0(NULL, initrd_offset),
135 initrd_size, loaderparams.kernel_cmdline);
137 snprintf((char *)params_buf + 8, 256, "%s", loaderparams.kernel_cmdline);
140 rom_add_blob_fixed("params", params_buf, params_size,
146 static void main_cpu_reset(void *opaque)
148 ResetData *s = (ResetData *)opaque;
149 CPUState *env = s->env;
152 env->active_tc.PC = s->vector;
155 static const int sector_len = 32 * 1024;
157 void mips_r4k_init (ram_addr_t ram_size,
158 const char *boot_device,
159 const char *kernel_filename, const char *kernel_cmdline,
160 const char *initrd_filename, const char *cpu_model)
163 ram_addr_t ram_offset;
164 ram_addr_t bios_offset;
167 ResetData *reset_info;
171 DriveInfo *hd[MAX_IDE_BUS * MAX_IDE_DEVS];
175 if (cpu_model == NULL) {
182 env = cpu_init(cpu_model);
184 fprintf(stderr, "Unable to find CPU definition\n");
187 reset_info = qemu_mallocz(sizeof(ResetData));
188 reset_info->env = env;
189 reset_info->vector = env->active_tc.PC;
190 qemu_register_reset(main_cpu_reset, reset_info);
193 if (ram_size > (256 << 20)) {
195 "qemu: Too much memory for this machine: %d MB, maximum 256 MB\n",
196 ((unsigned int)ram_size / (1 << 20)));
199 ram_offset = qemu_ram_alloc(ram_size);
201 cpu_register_physical_memory(0, ram_size, ram_offset | IO_MEM_RAM);
203 if (!mips_qemu_iomemtype) {
204 mips_qemu_iomemtype = cpu_register_io_memory(mips_qemu_read,
205 mips_qemu_write, NULL);
207 cpu_register_physical_memory(0x1fbf0000, 0x10000, mips_qemu_iomemtype);
209 /* Try to load a BIOS image. If this fails, we continue regardless,
210 but initialize the hardware ourselves. When a kernel gets
211 preloaded we also initialize the hardware, since the BIOS wasn't
213 if (bios_name == NULL)
214 bios_name = BIOS_FILENAME;
215 filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
217 bios_size = get_image_size(filename);
221 if ((bios_size > 0) && (bios_size <= BIOS_SIZE)) {
222 bios_offset = qemu_ram_alloc(BIOS_SIZE);
223 cpu_register_physical_memory(0x1fc00000, BIOS_SIZE,
224 bios_offset | IO_MEM_ROM);
226 load_image_targphys(filename, 0x1fc00000, BIOS_SIZE);
227 } else if ((dinfo = drive_get(IF_PFLASH, 0, 0)) != NULL) {
228 uint32_t mips_rom = 0x00400000;
229 bios_offset = qemu_ram_alloc(mips_rom);
230 if (!pflash_cfi01_register(0x1fc00000, bios_offset,
231 dinfo->bdrv, sector_len, mips_rom / sector_len,
233 fprintf(stderr, "qemu: Error registering flash memory.\n");
238 fprintf(stderr, "qemu: Warning, could not load MIPS bios '%s'\n",
245 if (kernel_filename) {
246 loaderparams.ram_size = ram_size;
247 loaderparams.kernel_filename = kernel_filename;
248 loaderparams.kernel_cmdline = kernel_cmdline;
249 loaderparams.initrd_filename = initrd_filename;
250 reset_info->vector = load_kernel();
253 /* Init CPU internal devices */
254 cpu_mips_irq_init_cpu(env);
255 cpu_mips_clock_init(env);
257 /* The PIC is attached to the MIPS CPU INT0 pin */
258 i8259 = i8259_init(env->irq[2]);
262 rtc_state = rtc_init(2000);
264 /* Register 64 KB of ISA IO space at 0x14000000 */
265 #ifdef TARGET_WORDS_BIGENDIAN
266 isa_mmio_init(0x14000000, 0x00010000, 1);
268 isa_mmio_init(0x14000000, 0x00010000, 0);
270 isa_mem_base = 0x10000000;
272 pit = pit_init(0x40, i8259[0]);
274 for(i = 0; i < MAX_SERIAL_PORTS; i++) {
276 serial_isa_init(i, serial_hds[i]);
282 if (nd_table[0].vlan)
283 isa_ne2000_init(0x300, 9, &nd_table[0]);
285 if (drive_get_max_bus(IF_IDE) >= MAX_IDE_BUS) {
286 fprintf(stderr, "qemu: too many IDE bus\n");
290 for(i = 0; i < MAX_IDE_BUS * MAX_IDE_DEVS; i++) {
291 hd[i] = drive_get(IF_IDE, i / MAX_IDE_DEVS, i % MAX_IDE_DEVS);
294 for(i = 0; i < MAX_IDE_BUS; i++)
295 isa_ide_init(ide_iobase[i], ide_iobase2[i], ide_irq[i],
296 hd[MAX_IDE_DEVS * i],
297 hd[MAX_IDE_DEVS * i + 1]);
299 isa_create_simple("i8042");
302 static QEMUMachine mips_machine = {
304 .desc = "mips r4k platform",
305 .init = mips_r4k_init,
308 static void mips_machine_init(void)
310 qemu_register_machine(&mips_machine);
313 machine_init(mips_machine_init);