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 0x80010000
15 #define INITRD_LOAD_ADDR 0x80800000
17 #define VIRT_TO_PHYS_ADDEND (-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);
80 kernel_size = load_image(kernel_filename,
81 phys_ram_base + KERNEL_LOAD_ADDR + VIRT_TO_PHYS_ADDEND);
82 if (kernel_size < 0) {
83 fprintf(stderr, "qemu: could not load kernel '%s'\n",
87 env->PC = KERNEL_LOAD_ADDR;
92 if (initrd_filename) {
93 initrd_size = load_image(initrd_filename,
94 phys_ram_base + INITRD_LOAD_ADDR + VIRT_TO_PHYS_ADDEND);
95 if (initrd_size == (target_ulong) -1) {
96 fprintf(stderr, "qemu: could not load initial ram disk '%s'\n",
102 /* Store command line. */
103 if (initrd_size > 0) {
105 ret = sprintf(phys_ram_base + (16 << 20) - 256,
106 "rd_start=0x%08x rd_size=%li ",
109 strcpy (phys_ram_base + (16 << 20) - 256 + ret, kernel_cmdline);
112 strcpy (phys_ram_base + (16 << 20) - 256, kernel_cmdline);
115 *(int *)(phys_ram_base + (16 << 20) - 260) = tswap32 (0x12345678);
116 *(int *)(phys_ram_base + (16 << 20) - 264) = tswap32 (ram_size);
119 static void main_cpu_reset(void *opaque)
121 CPUState *env = opaque;
124 if (env->kernel_filename)
125 load_kernel (env, env->ram_size, env->kernel_filename,
126 env->kernel_cmdline, env->initrd_filename);
129 void mips_r4k_init (int ram_size, int vga_ram_size, int boot_device,
130 DisplayState *ds, const char **fd_filename, int snapshot,
131 const char *kernel_filename, const char *kernel_cmdline,
132 const char *initrd_filename)
135 unsigned long bios_offset;
138 static RTCState *rtc_state;
142 register_savevm("cpu", 0, 3, cpu_save, cpu_load, env);
143 qemu_register_reset(main_cpu_reset, env);
146 cpu_register_physical_memory(0, ram_size, IO_MEM_RAM);
148 if (!mips_qemu_iomemtype) {
149 mips_qemu_iomemtype = cpu_register_io_memory(0, mips_qemu_read,
150 mips_qemu_write, NULL);
152 cpu_register_physical_memory(0x1fbf0000, 0x10000, mips_qemu_iomemtype);
154 /* Try to load a BIOS image. If this fails, we continue regardless,
155 but initialize the hardware ourselves. When a kernel gets
156 preloaded we also initialize the hardware, since the BIOS wasn't
158 bios_offset = ram_size + vga_ram_size;
159 snprintf(buf, sizeof(buf), "%s/%s", bios_dir, BIOS_FILENAME);
160 ret = load_image(buf, phys_ram_base + bios_offset);
161 if (ret == BIOS_SIZE) {
162 cpu_register_physical_memory((uint32_t)(0x1fc00000),
163 BIOS_SIZE, bios_offset | IO_MEM_ROM);
166 fprintf(stderr, "qemu: Warning, could not load MIPS bios '%s'\n",
170 if (kernel_filename) {
171 load_kernel (env, ram_size, kernel_filename, kernel_cmdline,
173 env->ram_size = ram_size;
174 env->kernel_filename = kernel_filename;
175 env->kernel_cmdline = kernel_cmdline;
176 env->initrd_filename = initrd_filename;
179 /* Init CPU internal devices */
180 cpu_mips_clock_init(env);
181 cpu_mips_irqctrl_init();
183 rtc_state = rtc_init(0x70, 8);
185 /* Register 64 KB of ISA IO space at 0x14000000 */
186 isa_mmio_init(0x14000000, 0x00010000);
187 isa_mem_base = 0x10000000;
189 isa_pic = pic_init(pic_irq_request, env);
190 pit = pit_init(0x40, 0);
192 serial_init(&pic_set_irq_new, isa_pic, 0x3f8, 4, serial_hds[0]);
193 isa_vga_init(ds, phys_ram_base + ram_size, ram_size,
196 if (nd_table[0].vlan) {
197 if (nd_table[0].model == NULL
198 || strcmp(nd_table[0].model, "ne2k_isa") == 0) {
199 isa_ne2000_init(0x300, 9, &nd_table[0]);
201 fprintf(stderr, "qemu: Unsupported NIC: %s\n", nd_table[0].model);
206 for(i = 0; i < 2; i++)
207 isa_ide_init(ide_iobase[i], ide_iobase2[i], ide_irq[i],
208 bs_table[2 * i], bs_table[2 * i + 1]);
211 QEMUMachine mips_machine = {