]>
git.proxmox.com Git - qemu.git/blob - hw/mips_r4k.c
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 };
27 static int serial_io
[MAX_SERIAL_PORTS
] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8 };
28 static int serial_irq
[MAX_SERIAL_PORTS
] = { 4, 3, 4, 3 };
32 static PITState
*pit
; /* PIT i8254 */
34 /*i8254 PIT is attached to the IRQ0 at PIC i8259 */
35 /*The PIC is attached to the MIPS CPU INT0 pin */
36 static void pic_irq_request(void *opaque
, int level
)
38 CPUState
*env
= first_cpu
;
40 env
->CP0_Cause
|= 0x00000400;
41 cpu_interrupt(env
, CPU_INTERRUPT_HARD
);
43 env
->CP0_Cause
&= ~0x00000400;
44 cpu_reset_interrupt(env
, CPU_INTERRUPT_HARD
);
48 static void mips_qemu_writel (void *opaque
, target_phys_addr_t addr
,
51 if ((addr
& 0xffff) == 0 && val
== 42)
52 qemu_system_reset_request ();
53 else if ((addr
& 0xffff) == 4 && val
== 42)
54 qemu_system_shutdown_request ();
57 static uint32_t mips_qemu_readl (void *opaque
, target_phys_addr_t addr
)
62 static CPUWriteMemoryFunc
*mips_qemu_write
[] = {
68 static CPUReadMemoryFunc
*mips_qemu_read
[] = {
74 static int mips_qemu_iomemtype
= 0;
76 void load_kernel (CPUState
*env
, int ram_size
, const char *kernel_filename
,
77 const char *kernel_cmdline
,
78 const char *initrd_filename
)
81 long kernel_size
, initrd_size
;
83 kernel_size
= load_elf(kernel_filename
, VIRT_TO_PHYS_ADDEND
, &entry
);
84 if (kernel_size
>= 0) {
85 if ((entry
& ~0x7fffffffULL
) == 0x80000000)
86 entry
= (int32_t)entry
;
89 kernel_size
= load_image(kernel_filename
,
90 phys_ram_base
+ KERNEL_LOAD_ADDR
+ VIRT_TO_PHYS_ADDEND
);
91 if (kernel_size
< 0) {
92 fprintf(stderr
, "qemu: could not load kernel '%s'\n",
96 env
->PC
= KERNEL_LOAD_ADDR
;
101 if (initrd_filename
) {
102 initrd_size
= load_image(initrd_filename
,
103 phys_ram_base
+ INITRD_LOAD_ADDR
+ VIRT_TO_PHYS_ADDEND
);
104 if (initrd_size
== (target_ulong
) -1) {
105 fprintf(stderr
, "qemu: could not load initial ram disk '%s'\n",
111 /* Store command line. */
112 if (initrd_size
> 0) {
114 ret
= sprintf(phys_ram_base
+ (16 << 20) - 256,
115 "rd_start=0x" TLSZ
" rd_size=%li ",
118 strcpy (phys_ram_base
+ (16 << 20) - 256 + ret
, kernel_cmdline
);
121 strcpy (phys_ram_base
+ (16 << 20) - 256, kernel_cmdline
);
124 *(int *)(phys_ram_base
+ (16 << 20) - 260) = tswap32 (0x12345678);
125 *(int *)(phys_ram_base
+ (16 << 20) - 264) = tswap32 (ram_size
);
128 static void main_cpu_reset(void *opaque
)
130 CPUState
*env
= opaque
;
133 if (env
->kernel_filename
)
134 load_kernel (env
, env
->ram_size
, env
->kernel_filename
,
135 env
->kernel_cmdline
, env
->initrd_filename
);
138 void mips_r4k_init (int ram_size
, int vga_ram_size
, int boot_device
,
139 DisplayState
*ds
, const char **fd_filename
, int snapshot
,
140 const char *kernel_filename
, const char *kernel_cmdline
,
141 const char *initrd_filename
)
144 unsigned long bios_offset
;
147 static RTCState
*rtc_state
;
151 register_savevm("cpu", 0, 3, cpu_save
, cpu_load
, env
);
152 qemu_register_reset(main_cpu_reset
, env
);
155 cpu_register_physical_memory(0, ram_size
, IO_MEM_RAM
);
157 if (!mips_qemu_iomemtype
) {
158 mips_qemu_iomemtype
= cpu_register_io_memory(0, mips_qemu_read
,
159 mips_qemu_write
, NULL
);
161 cpu_register_physical_memory(0x1fbf0000, 0x10000, mips_qemu_iomemtype
);
163 /* Try to load a BIOS image. If this fails, we continue regardless,
164 but initialize the hardware ourselves. When a kernel gets
165 preloaded we also initialize the hardware, since the BIOS wasn't
167 bios_offset
= ram_size
+ vga_ram_size
;
168 snprintf(buf
, sizeof(buf
), "%s/%s", bios_dir
, BIOS_FILENAME
);
169 ret
= load_image(buf
, phys_ram_base
+ bios_offset
);
170 if (ret
== BIOS_SIZE
) {
171 cpu_register_physical_memory((uint32_t)(0x1fc00000),
172 BIOS_SIZE
, bios_offset
| IO_MEM_ROM
);
175 fprintf(stderr
, "qemu: Warning, could not load MIPS bios '%s'\n",
179 if (kernel_filename
) {
180 load_kernel (env
, ram_size
, kernel_filename
, kernel_cmdline
,
182 env
->ram_size
= ram_size
;
183 env
->kernel_filename
= kernel_filename
;
184 env
->kernel_cmdline
= kernel_cmdline
;
185 env
->initrd_filename
= initrd_filename
;
188 /* Init CPU internal devices */
189 cpu_mips_clock_init(env
);
190 cpu_mips_irqctrl_init();
192 rtc_state
= rtc_init(0x70, 8);
194 /* Register 64 KB of ISA IO space at 0x14000000 */
195 isa_mmio_init(0x14000000, 0x00010000);
196 isa_mem_base
= 0x10000000;
198 isa_pic
= pic_init(pic_irq_request
, env
);
199 pit
= pit_init(0x40, 0);
201 for(i
= 0; i
< MAX_SERIAL_PORTS
; i
++) {
203 serial_init(&pic_set_irq_new
, isa_pic
,
204 serial_io
[i
], serial_irq
[i
], serial_hds
[i
]);
208 isa_vga_init(ds
, phys_ram_base
+ ram_size
, ram_size
,
211 if (nd_table
[0].vlan
) {
212 if (nd_table
[0].model
== NULL
213 || strcmp(nd_table
[0].model
, "ne2k_isa") == 0) {
214 isa_ne2000_init(0x300, 9, &nd_table
[0]);
216 fprintf(stderr
, "qemu: Unsupported NIC: %s\n", nd_table
[0].model
);
221 for(i
= 0; i
< 2; i
++)
222 isa_ide_init(ide_iobase
[i
], ide_iobase2
[i
], ide_irq
[i
],
223 bs_table
[2 * i
], bs_table
[2 * i
+ 1]);
226 QEMUMachine mips_machine
= {