]>
git.proxmox.com Git - mirror_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.
19 #include "mips-bios.h"
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 };
37 static PITState
*pit
; /* PIT i8254 */
39 /* i8254 PIT is attached to the IRQ0 at PIC i8259 */
41 static struct _loaderparams
{
43 const char *kernel_filename
;
44 const char *kernel_cmdline
;
45 const char *initrd_filename
;
48 static void mips_qemu_writel (void *opaque
, a_target_phys_addr 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
, a_target_phys_addr addr
)
62 static CPUWriteMemoryFunc
* const mips_qemu_write
[] = {
68 static CPUReadMemoryFunc
* const mips_qemu_read
[] = {
74 static int mips_qemu_iomemtype
= 0;
76 static void load_kernel (CPUState
*env
)
78 int64_t entry
, kernel_low
, kernel_high
;
79 long kernel_size
, initrd_size
;
80 a_ram_addr initrd_offset
;
84 #ifdef TARGET_WORDS_BIGENDIAN
89 kernel_size
= load_elf(loaderparams
.kernel_filename
, VIRT_TO_PHYS_ADDEND
,
90 (uint64_t *)&entry
, (uint64_t *)&kernel_low
,
91 (uint64_t *)&kernel_high
, big_endian
, ELF_MACHINE
, 1);
92 if (kernel_size
>= 0) {
93 if ((entry
& ~0x7fffffffULL
) == 0x80000000)
94 entry
= (int32_t)entry
;
95 env
->active_tc
.PC
= entry
;
97 fprintf(stderr
, "qemu: could not load kernel '%s'\n",
98 loaderparams
.kernel_filename
);
105 if (loaderparams
.initrd_filename
) {
106 initrd_size
= get_image_size (loaderparams
.initrd_filename
);
107 if (initrd_size
> 0) {
108 initrd_offset
= (kernel_high
+ ~TARGET_PAGE_MASK
) & TARGET_PAGE_MASK
;
109 if (initrd_offset
+ initrd_size
> ram_size
) {
111 "qemu: memory too small for initial ram disk '%s'\n",
112 loaderparams
.initrd_filename
);
115 initrd_size
= load_image_targphys(loaderparams
.initrd_filename
,
117 ram_size
- initrd_offset
);
119 if (initrd_size
== (target_ulong
) -1) {
120 fprintf(stderr
, "qemu: could not load initial ram disk '%s'\n",
121 loaderparams
.initrd_filename
);
126 /* Store command line. */
127 if (initrd_size
> 0) {
129 ret
= snprintf(buf
, 64, "rd_start=0x" TARGET_FMT_lx
" rd_size=%li ",
130 PHYS_TO_VIRT((uint32_t)initrd_offset
),
132 cpu_physical_memory_write((16 << 20) - 256, (void *)buf
, 64);
136 pstrcpy_targphys((16 << 20) - 256 + ret
, 256,
137 loaderparams
.kernel_cmdline
);
139 stl_phys((16 << 20) - 260, 0x12345678);
140 stl_phys((16 << 20) - 264, ram_size
);
143 static void main_cpu_reset(void *opaque
)
145 CPUState
*env
= opaque
;
148 if (loaderparams
.kernel_filename
)
152 static const int sector_len
= 32 * 1024;
154 void mips_r4k_init (a_ram_addr ram_size
,
155 const char *boot_device
,
156 const char *kernel_filename
, const char *kernel_cmdline
,
157 const char *initrd_filename
, const char *cpu_model
)
160 a_ram_addr ram_offset
;
161 a_ram_addr bios_offset
;
167 DriveInfo
*hd
[MAX_IDE_BUS
* MAX_IDE_DEVS
];
171 if (cpu_model
== NULL
) {
178 env
= cpu_init(cpu_model
);
180 fprintf(stderr
, "Unable to find CPU definition\n");
183 qemu_register_reset(main_cpu_reset
, env
);
186 if (ram_size
> (256 << 20)) {
188 "qemu: Too much memory for this machine: %d MB, maximum 256 MB\n",
189 ((unsigned int)ram_size
/ (1 << 20)));
192 ram_offset
= qemu_ram_alloc(ram_size
);
194 cpu_register_physical_memory(0, ram_size
, ram_offset
| IO_MEM_RAM
);
196 if (!mips_qemu_iomemtype
) {
197 mips_qemu_iomemtype
= cpu_register_io_memory(mips_qemu_read
,
198 mips_qemu_write
, NULL
);
200 cpu_register_physical_memory(0x1fbf0000, 0x10000, mips_qemu_iomemtype
);
202 /* Try to load a BIOS image. If this fails, we continue regardless,
203 but initialize the hardware ourselves. When a kernel gets
204 preloaded we also initialize the hardware, since the BIOS wasn't
206 if (bios_name
== NULL
)
207 bios_name
= BIOS_FILENAME
;
208 filename
= qemu_find_file(QEMU_FILE_TYPE_BIOS
, bios_name
);
210 bios_size
= get_image_size(filename
);
214 if ((bios_size
> 0) && (bios_size
<= BIOS_SIZE
)) {
215 bios_offset
= qemu_ram_alloc(BIOS_SIZE
);
216 cpu_register_physical_memory(0x1fc00000, BIOS_SIZE
,
217 bios_offset
| IO_MEM_ROM
);
219 load_image_targphys(filename
, 0x1fc00000, BIOS_SIZE
);
220 } else if ((dinfo
= drive_get(IF_PFLASH
, 0, 0)) != NULL
) {
221 uint32_t mips_rom
= 0x00400000;
222 bios_offset
= qemu_ram_alloc(mips_rom
);
223 if (!pflash_cfi01_register(0x1fc00000, bios_offset
,
224 dinfo
->bdrv
, sector_len
, mips_rom
/ sector_len
,
226 fprintf(stderr
, "qemu: Error registering flash memory.\n");
231 fprintf(stderr
, "qemu: Warning, could not load MIPS bios '%s'\n",
238 if (kernel_filename
) {
239 loaderparams
.ram_size
= ram_size
;
240 loaderparams
.kernel_filename
= kernel_filename
;
241 loaderparams
.kernel_cmdline
= kernel_cmdline
;
242 loaderparams
.initrd_filename
= initrd_filename
;
246 /* Init CPU internal devices */
247 cpu_mips_irq_init_cpu(env
);
248 cpu_mips_clock_init(env
);
250 /* The PIC is attached to the MIPS CPU INT0 pin */
251 i8259
= i8259_init(env
->irq
[2]);
255 rtc_state
= rtc_init(2000);
257 /* Register 64 KB of ISA IO space at 0x14000000 */
258 isa_mmio_init(0x14000000, 0x00010000);
259 isa_mem_base
= 0x10000000;
261 pit
= pit_init(0x40, i8259
[0]);
263 for(i
= 0; i
< MAX_SERIAL_PORTS
; i
++) {
265 serial_init(serial_io
[i
], i8259
[serial_irq
[i
]], 115200,
272 if (nd_table
[0].vlan
)
273 isa_ne2000_init(0x300, 9, &nd_table
[0]);
275 if (drive_get_max_bus(IF_IDE
) >= MAX_IDE_BUS
) {
276 fprintf(stderr
, "qemu: too many IDE bus\n");
280 for(i
= 0; i
< MAX_IDE_BUS
* MAX_IDE_DEVS
; i
++) {
281 hd
[i
] = drive_get(IF_IDE
, i
/ MAX_IDE_DEVS
, i
% MAX_IDE_DEVS
);
284 for(i
= 0; i
< MAX_IDE_BUS
; i
++)
285 isa_ide_init(ide_iobase
[i
], ide_iobase2
[i
], ide_irq
[i
],
286 hd
[MAX_IDE_DEVS
* i
],
287 hd
[MAX_IDE_DEVS
* i
+ 1]);
289 isa_create_simple("i8042");
292 static QEMUMachine mips_machine
= {
294 .desc
= "mips r4k platform",
295 .init
= mips_r4k_init
,
298 static void mips_machine_init(void)
300 qemu_register_machine(&mips_machine
);
303 machine_init(mips_machine_init
);