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 (int32_t)0x80010000
15 #ifdef MIPS_HAS_MIPS64
16 #define INITRD_LOAD_ADDR (int64_t)0x80800000
18 #define INITRD_LOAD_ADDR (int32_t)0x80800000
21 #define VIRT_TO_PHYS_ADDEND (-((int64_t)(int32_t)0x80000000))
23 static const int ide_iobase[2] = { 0x1f0, 0x170 };
24 static const int ide_iobase2[2] = { 0x3f6, 0x376 };
25 static const int ide_irq[2] = { 14, 15 };
29 static PITState *pit; /* PIT i8254 */
31 /*i8254 PIT is attached to the IRQ0 at PIC i8259 */
32 /*The PIC is attached to the MIPS CPU INT0 pin */
33 static void pic_irq_request(void *opaque, int level)
35 CPUState *env = first_cpu;
37 env->CP0_Cause |= 0x00000400;
38 cpu_interrupt(env, CPU_INTERRUPT_HARD);
40 env->CP0_Cause &= ~0x00000400;
41 cpu_reset_interrupt(env, CPU_INTERRUPT_HARD);
45 static void mips_qemu_writel (void *opaque, target_phys_addr_t addr,
48 if ((addr & 0xffff) == 0 && val == 42)
49 qemu_system_reset_request ();
50 else if ((addr & 0xffff) == 4 && val == 42)
51 qemu_system_shutdown_request ();
54 static uint32_t mips_qemu_readl (void *opaque, target_phys_addr_t addr)
59 static CPUWriteMemoryFunc *mips_qemu_write[] = {
65 static CPUReadMemoryFunc *mips_qemu_read[] = {
71 static int mips_qemu_iomemtype = 0;
73 void load_kernel (CPUState *env, int ram_size, const char *kernel_filename,
74 const char *kernel_cmdline,
75 const char *initrd_filename)
78 long kernel_size, initrd_size;
80 kernel_size = load_elf(kernel_filename, VIRT_TO_PHYS_ADDEND, &entry);
81 if (kernel_size >= 0) {
82 if ((entry & ~0x7fffffffULL) == 0x80000000)
83 entry = (int32_t)entry;
86 kernel_size = load_image(kernel_filename,
87 phys_ram_base + KERNEL_LOAD_ADDR + VIRT_TO_PHYS_ADDEND);
88 if (kernel_size < 0) {
89 fprintf(stderr, "qemu: could not load kernel '%s'\n",
93 env->PC = KERNEL_LOAD_ADDR;
98 if (initrd_filename) {
99 initrd_size = load_image(initrd_filename,
100 phys_ram_base + INITRD_LOAD_ADDR + VIRT_TO_PHYS_ADDEND);
101 if (initrd_size == (target_ulong) -1) {
102 fprintf(stderr, "qemu: could not load initial ram disk '%s'\n",
108 /* Store command line. */
109 if (initrd_size > 0) {
111 ret = sprintf(phys_ram_base + (16 << 20) - 256,
112 "rd_start=0x" TLSZ " rd_size=%li ",
115 strcpy (phys_ram_base + (16 << 20) - 256 + ret, kernel_cmdline);
118 strcpy (phys_ram_base + (16 << 20) - 256, kernel_cmdline);
121 *(int *)(phys_ram_base + (16 << 20) - 260) = tswap32 (0x12345678);
122 *(int *)(phys_ram_base + (16 << 20) - 264) = tswap32 (ram_size);
125 static void main_cpu_reset(void *opaque)
127 CPUState *env = opaque;
130 if (env->kernel_filename)
131 load_kernel (env, env->ram_size, env->kernel_filename,
132 env->kernel_cmdline, env->initrd_filename);
135 void mips_r4k_init (int ram_size, int vga_ram_size, int boot_device,
136 DisplayState *ds, const char **fd_filename, int snapshot,
137 const char *kernel_filename, const char *kernel_cmdline,
138 const char *initrd_filename)
141 unsigned long bios_offset;
144 static RTCState *rtc_state;
148 register_savevm("cpu", 0, 3, cpu_save, cpu_load, env);
149 qemu_register_reset(main_cpu_reset, env);
152 cpu_register_physical_memory(0, ram_size, IO_MEM_RAM);
154 if (!mips_qemu_iomemtype) {
155 mips_qemu_iomemtype = cpu_register_io_memory(0, mips_qemu_read,
156 mips_qemu_write, NULL);
158 cpu_register_physical_memory(0x1fbf0000, 0x10000, mips_qemu_iomemtype);
160 /* Try to load a BIOS image. If this fails, we continue regardless,
161 but initialize the hardware ourselves. When a kernel gets
162 preloaded we also initialize the hardware, since the BIOS wasn't
164 bios_offset = ram_size + vga_ram_size;
165 snprintf(buf, sizeof(buf), "%s/%s", bios_dir, BIOS_FILENAME);
166 ret = load_image(buf, phys_ram_base + bios_offset);
167 if (ret == BIOS_SIZE) {
168 cpu_register_physical_memory((uint32_t)(0x1fc00000),
169 BIOS_SIZE, bios_offset | IO_MEM_ROM);
172 fprintf(stderr, "qemu: Warning, could not load MIPS bios '%s'\n",
176 if (kernel_filename) {
177 load_kernel (env, ram_size, kernel_filename, kernel_cmdline,
179 env->ram_size = ram_size;
180 env->kernel_filename = kernel_filename;
181 env->kernel_cmdline = kernel_cmdline;
182 env->initrd_filename = initrd_filename;
185 /* Init CPU internal devices */
186 cpu_mips_clock_init(env);
187 cpu_mips_irqctrl_init();
189 rtc_state = rtc_init(0x70, 8);
191 /* Register 64 KB of ISA IO space at 0x14000000 */
192 isa_mmio_init(0x14000000, 0x00010000);
193 isa_mem_base = 0x10000000;
195 isa_pic = pic_init(pic_irq_request, env);
196 pit = pit_init(0x40, 0);
198 serial_init(&pic_set_irq_new, isa_pic, 0x3f8, 4, serial_hds[0]);
199 isa_vga_init(ds, phys_ram_base + ram_size, ram_size,
202 if (nd_table[0].vlan) {
203 if (nd_table[0].model == NULL
204 || strcmp(nd_table[0].model, "ne2k_isa") == 0) {
205 isa_ne2000_init(0x300, 9, &nd_table[0]);
207 fprintf(stderr, "qemu: Unsupported NIC: %s\n", nd_table[0].model);
212 for(i = 0; i < 2; i++)
213 isa_ide_init(ide_iobase[i], ide_iobase2[i], ide_irq[i],
214 bs_table[2 * i], bs_table[2 * i + 1]);
217 QEMUMachine mips_machine = {