]>
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.
18 #ifdef TARGET_WORDS_BIGENDIAN
19 #define BIOS_FILENAME "mips_bios.bin"
21 #define BIOS_FILENAME "mipsel_bios.bin"
24 #define PHYS_TO_VIRT(x) ((x) | ~(target_ulong)0x7fffffff)
26 #define VIRT_TO_PHYS_ADDEND (-((int64_t)(int32_t)0x80000000))
30 static const int ide_iobase
[2] = { 0x1f0, 0x170 };
31 static const int ide_iobase2
[2] = { 0x3f6, 0x376 };
32 static const int ide_irq
[2] = { 14, 15 };
34 static int serial_io
[MAX_SERIAL_PORTS
] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8 };
35 static int serial_irq
[MAX_SERIAL_PORTS
] = { 4, 3, 4, 3 };
39 static PITState
*pit
; /* PIT i8254 */
41 /* i8254 PIT is attached to the IRQ0 at PIC i8259 */
43 static struct _loaderparams
{
45 const char *kernel_filename
;
46 const char *kernel_cmdline
;
47 const char *initrd_filename
;
50 static void mips_qemu_writel (void *opaque
, target_phys_addr_t addr
,
53 if ((addr
& 0xffff) == 0 && val
== 42)
54 qemu_system_reset_request ();
55 else if ((addr
& 0xffff) == 4 && val
== 42)
56 qemu_system_shutdown_request ();
59 static uint32_t mips_qemu_readl (void *opaque
, target_phys_addr_t addr
)
64 static CPUWriteMemoryFunc
*mips_qemu_write
[] = {
70 static CPUReadMemoryFunc
*mips_qemu_read
[] = {
76 static int mips_qemu_iomemtype
= 0;
78 static void load_kernel (CPUState
*env
)
80 int64_t entry
, kernel_low
, kernel_high
;
81 long kernel_size
, initrd_size
;
82 ram_addr_t initrd_offset
;
84 kernel_size
= load_elf(loaderparams
.kernel_filename
, VIRT_TO_PHYS_ADDEND
,
85 &entry
, &kernel_low
, &kernel_high
);
86 if (kernel_size
>= 0) {
87 if ((entry
& ~0x7fffffffULL
) == 0x80000000)
88 entry
= (int32_t)entry
;
89 env
->PC
[env
->current_tc
] = entry
;
91 fprintf(stderr
, "qemu: could not load kernel '%s'\n",
92 loaderparams
.kernel_filename
);
99 if (loaderparams
.initrd_filename
) {
100 initrd_size
= get_image_size (loaderparams
.initrd_filename
);
101 if (initrd_size
> 0) {
102 initrd_offset
= (kernel_high
+ ~TARGET_PAGE_MASK
) & TARGET_PAGE_MASK
;
103 if (initrd_offset
+ initrd_size
> ram_size
) {
105 "qemu: memory too small for initial ram disk '%s'\n",
106 loaderparams
.initrd_filename
);
109 initrd_size
= load_image(loaderparams
.initrd_filename
,
110 phys_ram_base
+ initrd_offset
);
112 if (initrd_size
== (target_ulong
) -1) {
113 fprintf(stderr
, "qemu: could not load initial ram disk '%s'\n",
114 loaderparams
.initrd_filename
);
119 /* Store command line. */
120 if (initrd_size
> 0) {
122 ret
= sprintf(phys_ram_base
+ (16 << 20) - 256,
123 "rd_start=0x" TARGET_FMT_lx
" rd_size=%li ",
124 PHYS_TO_VIRT((uint32_t)initrd_offset
),
126 strcpy (phys_ram_base
+ (16 << 20) - 256 + ret
,
127 loaderparams
.kernel_cmdline
);
130 strcpy (phys_ram_base
+ (16 << 20) - 256,
131 loaderparams
.kernel_cmdline
);
134 *(int32_t *)(phys_ram_base
+ (16 << 20) - 260) = tswap32 (0x12345678);
135 *(int32_t *)(phys_ram_base
+ (16 << 20) - 264) = tswap32 (ram_size
);
138 static void main_cpu_reset(void *opaque
)
140 CPUState
*env
= opaque
;
143 if (loaderparams
.kernel_filename
)
148 void mips_r4k_init (int ram_size
, int vga_ram_size
,
149 const char *boot_device
, DisplayState
*ds
,
150 const char *kernel_filename
, const char *kernel_cmdline
,
151 const char *initrd_filename
, const char *cpu_model
)
154 unsigned long bios_offset
;
161 BlockDriverState
*hd
[MAX_IDE_BUS
* MAX_IDE_DEVS
];
164 if (cpu_model
== NULL
) {
171 env
= cpu_init(cpu_model
);
173 fprintf(stderr
, "Unable to find CPU definition\n");
176 register_savevm("cpu", 0, 3, cpu_save
, cpu_load
, env
);
177 qemu_register_reset(main_cpu_reset
, env
);
180 cpu_register_physical_memory(0, ram_size
, IO_MEM_RAM
);
182 if (!mips_qemu_iomemtype
) {
183 mips_qemu_iomemtype
= cpu_register_io_memory(0, mips_qemu_read
,
184 mips_qemu_write
, NULL
);
186 cpu_register_physical_memory(0x1fbf0000, 0x10000, mips_qemu_iomemtype
);
188 /* Try to load a BIOS image. If this fails, we continue regardless,
189 but initialize the hardware ourselves. When a kernel gets
190 preloaded we also initialize the hardware, since the BIOS wasn't
192 bios_offset
= ram_size
+ vga_ram_size
;
193 if (bios_name
== NULL
)
194 bios_name
= BIOS_FILENAME
;
195 snprintf(buf
, sizeof(buf
), "%s/%s", bios_dir
, bios_name
);
196 bios_size
= load_image(buf
, phys_ram_base
+ bios_offset
);
197 if ((bios_size
> 0) && (bios_size
<= BIOS_SIZE
)) {
198 cpu_register_physical_memory(0x1fc00000,
199 BIOS_SIZE
, bios_offset
| IO_MEM_ROM
);
202 fprintf(stderr
, "qemu: Warning, could not load MIPS bios '%s'\n",
206 if (kernel_filename
) {
207 loaderparams
.ram_size
= ram_size
;
208 loaderparams
.kernel_filename
= kernel_filename
;
209 loaderparams
.kernel_cmdline
= kernel_cmdline
;
210 loaderparams
.initrd_filename
= initrd_filename
;
214 /* Init CPU internal devices */
215 cpu_mips_irq_init_cpu(env
);
216 cpu_mips_clock_init(env
);
217 cpu_mips_irqctrl_init();
219 /* The PIC is attached to the MIPS CPU INT0 pin */
220 i8259
= i8259_init(env
->irq
[2]);
222 rtc_state
= rtc_init(0x70, i8259
[8]);
224 /* Register 64 KB of ISA IO space at 0x14000000 */
225 isa_mmio_init(0x14000000, 0x00010000);
226 isa_mem_base
= 0x10000000;
228 pit
= pit_init(0x40, i8259
[0]);
230 for(i
= 0; i
< MAX_SERIAL_PORTS
; i
++) {
232 serial_init(serial_io
[i
], i8259
[serial_irq
[i
]], serial_hds
[i
]);
236 isa_vga_init(ds
, phys_ram_base
+ ram_size
, ram_size
,
239 if (nd_table
[0].vlan
) {
240 if (nd_table
[0].model
== NULL
241 || strcmp(nd_table
[0].model
, "ne2k_isa") == 0) {
242 isa_ne2000_init(0x300, i8259
[9], &nd_table
[0]);
243 } else if (strcmp(nd_table
[0].model
, "?") == 0) {
244 fprintf(stderr
, "qemu: Supported NICs: ne2k_isa\n");
247 fprintf(stderr
, "qemu: Unsupported NIC: %s\n", nd_table
[0].model
);
252 if (drive_get_max_bus(IF_IDE
) >= MAX_IDE_BUS
) {
253 fprintf(stderr
, "qemu: too many IDE bus\n");
257 for(i
= 0; i
< MAX_IDE_BUS
* MAX_IDE_DEVS
; i
++) {
258 index
= drive_get_index(IF_IDE
, i
/ MAX_IDE_DEVS
, i
% MAX_IDE_DEVS
);
260 hd
[i
] = drives_table
[index
].bdrv
;
265 for(i
= 0; i
< MAX_IDE_BUS
; i
++)
266 isa_ide_init(ide_iobase
[i
], ide_iobase2
[i
], i8259
[ide_irq
[i
]],
267 hd
[MAX_IDE_DEVS
* i
],
268 hd
[MAX_IDE_DEVS
* i
+ 1]);
270 i8042_init(i8259
[1], i8259
[12], 0x60);
273 QEMUMachine mips_machine
= {