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 #define BIOS_FILENAME "mips_bios.bin"
13 //#define BIOS_FILENAME "system.bin"
14 #define KERNEL_LOAD_ADDR SIGN_EXTEND32(0x80010000)
15 #define INITRD_LOAD_ADDR SIGN_EXTEND32(0x80800000)
17 #define VIRT_TO_PHYS_ADDEND (-SIGN_EXTEND32(0x80000000LL))
19 static const int ide_iobase[2] = { 0x1f0, 0x170 };
20 static const int ide_iobase2[2] = { 0x3f6, 0x376 };
21 static const int ide_irq[2] = { 14, 15 };
25 static PITState *pit; /* PIT i8254 */
27 /*i8254 PIT is attached to the IRQ0 at PIC i8259 */
28 /*The PIC is attached to the MIPS CPU INT0 pin */
29 static void pic_irq_request(void *opaque, int level)
31 CPUState *env = first_cpu;
33 env->CP0_Cause |= 0x00000400;
34 cpu_interrupt(env, CPU_INTERRUPT_HARD);
36 env->CP0_Cause &= ~0x00000400;
37 cpu_reset_interrupt(env, CPU_INTERRUPT_HARD);
41 static void mips_qemu_writel (void *opaque, target_phys_addr_t addr,
44 if ((addr & 0xffff) == 0 && val == 42)
45 qemu_system_reset_request ();
46 else if ((addr & 0xffff) == 4 && val == 42)
47 qemu_system_shutdown_request ();
50 static uint32_t mips_qemu_readl (void *opaque, target_phys_addr_t addr)
55 static CPUWriteMemoryFunc *mips_qemu_write[] = {
61 static CPUReadMemoryFunc *mips_qemu_read[] = {
67 static int mips_qemu_iomemtype = 0;
69 void load_kernel (CPUState *env, int ram_size, const char *kernel_filename,
70 const char *kernel_cmdline,
71 const char *initrd_filename)
74 long kernel_size, initrd_size;
76 kernel_size = load_elf(kernel_filename, VIRT_TO_PHYS_ADDEND, &entry);
77 if (kernel_size >= 0) {
78 if ((entry & ~0x7fffffffULL) == 0x80000000)
79 entry = SIGN_EXTEND32(entry);
82 kernel_size = load_image(kernel_filename,
83 phys_ram_base + KERNEL_LOAD_ADDR + VIRT_TO_PHYS_ADDEND);
84 if (kernel_size < 0) {
85 fprintf(stderr, "qemu: could not load kernel '%s'\n",
89 env->PC = KERNEL_LOAD_ADDR;
94 if (initrd_filename) {
95 initrd_size = load_image(initrd_filename,
96 phys_ram_base + INITRD_LOAD_ADDR + VIRT_TO_PHYS_ADDEND);
97 if (initrd_size == (target_ulong) -1) {
98 fprintf(stderr, "qemu: could not load initial ram disk '%s'\n",
104 /* Store command line. */
105 if (initrd_size > 0) {
107 ret = sprintf(phys_ram_base + (16 << 20) - 256,
108 "rd_start=0x" TLSZ " rd_size=%li ",
111 strcpy (phys_ram_base + (16 << 20) - 256 + ret, kernel_cmdline);
114 strcpy (phys_ram_base + (16 << 20) - 256, kernel_cmdline);
117 *(int *)(phys_ram_base + (16 << 20) - 260) = tswap32 (0x12345678);
118 *(int *)(phys_ram_base + (16 << 20) - 264) = tswap32 (ram_size);
121 static void main_cpu_reset(void *opaque)
123 CPUState *env = opaque;
126 if (env->kernel_filename)
127 load_kernel (env, env->ram_size, env->kernel_filename,
128 env->kernel_cmdline, env->initrd_filename);
131 void mips_r4k_init (int ram_size, int vga_ram_size, int boot_device,
132 DisplayState *ds, const char **fd_filename, int snapshot,
133 const char *kernel_filename, const char *kernel_cmdline,
134 const char *initrd_filename)
137 unsigned long bios_offset;
140 static RTCState *rtc_state;
144 register_savevm("cpu", 0, 3, cpu_save, cpu_load, env);
145 qemu_register_reset(main_cpu_reset, env);
148 cpu_register_physical_memory(0, ram_size, IO_MEM_RAM);
150 if (!mips_qemu_iomemtype) {
151 mips_qemu_iomemtype = cpu_register_io_memory(0, mips_qemu_read,
152 mips_qemu_write, NULL);
154 cpu_register_physical_memory(0x1fbf0000, 0x10000, mips_qemu_iomemtype);
156 /* Try to load a BIOS image. If this fails, we continue regardless,
157 but initialize the hardware ourselves. When a kernel gets
158 preloaded we also initialize the hardware, since the BIOS wasn't
160 bios_offset = ram_size + vga_ram_size;
161 snprintf(buf, sizeof(buf), "%s/%s", bios_dir, BIOS_FILENAME);
162 ret = load_image(buf, phys_ram_base + bios_offset);
163 if (ret == BIOS_SIZE) {
164 cpu_register_physical_memory((uint32_t)(0x1fc00000),
165 BIOS_SIZE, bios_offset | IO_MEM_ROM);
168 fprintf(stderr, "qemu: Warning, could not load MIPS bios '%s'\n",
172 if (kernel_filename) {
173 load_kernel (env, ram_size, kernel_filename, kernel_cmdline,
175 env->ram_size = ram_size;
176 env->kernel_filename = kernel_filename;
177 env->kernel_cmdline = kernel_cmdline;
178 env->initrd_filename = initrd_filename;
181 /* Init CPU internal devices */
182 cpu_mips_clock_init(env);
183 cpu_mips_irqctrl_init();
185 rtc_state = rtc_init(0x70, 8);
187 /* Register 64 KB of ISA IO space at 0x14000000 */
188 isa_mmio_init(0x14000000, 0x00010000);
189 isa_mem_base = 0x10000000;
191 isa_pic = pic_init(pic_irq_request, env);
192 pit = pit_init(0x40, 0);
194 serial_init(&pic_set_irq_new, isa_pic, 0x3f8, 4, serial_hds[0]);
195 isa_vga_init(ds, phys_ram_base + ram_size, ram_size,
198 if (nd_table[0].vlan) {
199 if (nd_table[0].model == NULL
200 || strcmp(nd_table[0].model, "ne2k_isa") == 0) {
201 isa_ne2000_init(0x300, 9, &nd_table[0]);
203 fprintf(stderr, "qemu: Unsupported NIC: %s\n", nd_table[0].model);
208 for(i = 0; i < 2; i++)
209 isa_ide_init(ide_iobase[i], ide_iobase2[i], ide_irq[i],
210 bs_table[2 * i], bs_table[2 * i + 1]);
213 QEMUMachine mips_machine = {