2 * QEMU/moxiesim emulation
4 * Emulates a very simple machine model similar to the one used by the
7 * Copyright (c) 2008, 2009, 2010, 2013 Anthony Green
9 * Permission is hereby granted, free of charge, to any person obtaining a copy
10 * of this software and associated documentation files (the "Software"), to deal
11 * in the Software without restriction, including without limitation the rights
12 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
13 * copies of the Software, and to permit persons to whom the Software is
14 * furnished to do so, subject to the following conditions:
16 * The above copyright notice and this permission notice shall be included in
17 * all copies or substantial portions of the Software.
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
20 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
22 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
23 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
24 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
27 #include "qemu/osdep.h"
28 #include "qapi/error.h"
29 #include "hw/sysbus.h"
31 #include "hw/i386/pc.h"
32 #include "hw/isa/isa.h"
34 #include "sysemu/sysemu.h"
35 #include "hw/boards.h"
36 #include "hw/loader.h"
37 #include "hw/char/serial.h"
38 #include "exec/address-spaces.h"
41 #define PHYS_MEM_BASE 0x80000000
45 const char *kernel_filename
;
46 const char *kernel_cmdline
;
47 const char *initrd_filename
;
50 static void load_kernel(MoxieCPU
*cpu
, LoaderParams
*loader_params
)
52 uint64_t entry
, kernel_low
, kernel_high
;
55 ram_addr_t initrd_offset
;
57 kernel_size
= load_elf(loader_params
->kernel_filename
, NULL
, NULL
,
58 &entry
, &kernel_low
, &kernel_high
, 1, EM_MOXIE
,
61 if (kernel_size
<= 0) {
62 fprintf(stderr
, "qemu: could not load kernel '%s'\n",
63 loader_params
->kernel_filename
);
70 if (loader_params
->initrd_filename
) {
71 initrd_size
= get_image_size(loader_params
->initrd_filename
);
72 if (initrd_size
> 0) {
73 initrd_offset
= (kernel_high
+ ~TARGET_PAGE_MASK
)
75 if (initrd_offset
+ initrd_size
> loader_params
->ram_size
) {
77 "qemu: memory too small for initial ram disk '%s'\n",
78 loader_params
->initrd_filename
);
81 initrd_size
= load_image_targphys(loader_params
->initrd_filename
,
85 if (initrd_size
== (target_ulong
)-1) {
86 fprintf(stderr
, "qemu: could not load initial ram disk '%s'\n",
87 loader_params
->initrd_filename
);
93 static void main_cpu_reset(void *opaque
)
95 MoxieCPU
*cpu
= opaque
;
100 static void moxiesim_init(MachineState
*machine
)
102 MoxieCPU
*cpu
= NULL
;
103 ram_addr_t ram_size
= machine
->ram_size
;
104 const char *cpu_model
= machine
->cpu_model
;
105 const char *kernel_filename
= machine
->kernel_filename
;
106 const char *kernel_cmdline
= machine
->kernel_cmdline
;
107 const char *initrd_filename
= machine
->initrd_filename
;
109 MemoryRegion
*address_space_mem
= get_system_memory();
110 MemoryRegion
*ram
= g_new(MemoryRegion
, 1);
111 MemoryRegion
*rom
= g_new(MemoryRegion
, 1);
112 hwaddr ram_base
= 0x200000;
113 LoaderParams loader_params
;
116 if (cpu_model
== NULL
) {
117 cpu_model
= "MoxieLite-moxie-cpu";
119 cpu
= cpu_moxie_init(cpu_model
);
121 fprintf(stderr
, "Unable to find CPU definition\n");
126 qemu_register_reset(main_cpu_reset
, cpu
);
129 memory_region_init_ram(ram
, NULL
, "moxiesim.ram", ram_size
, &error_fatal
);
130 vmstate_register_ram_global(ram
);
131 memory_region_add_subregion(address_space_mem
, ram_base
, ram
);
133 memory_region_init_ram(rom
, NULL
, "moxie.rom", 128*0x1000, &error_fatal
);
134 vmstate_register_ram_global(rom
);
135 memory_region_add_subregion(get_system_memory(), 0x1000, rom
);
137 if (kernel_filename
) {
138 loader_params
.ram_size
= ram_size
;
139 loader_params
.kernel_filename
= kernel_filename
;
140 loader_params
.kernel_cmdline
= kernel_cmdline
;
141 loader_params
.initrd_filename
= initrd_filename
;
142 load_kernel(cpu
, &loader_params
);
145 /* A single 16450 sits at offset 0x3f8. */
147 serial_mm_init(address_space_mem
, 0x3f8, 0, env
->irq
[4],
148 8000000/16, serial_hds
[0], DEVICE_LITTLE_ENDIAN
);
152 static void moxiesim_machine_init(MachineClass
*mc
)
154 mc
->desc
= "Moxie simulator platform";
155 mc
->init
= moxiesim_init
;
159 DEFINE_MACHINE("moxiesim", moxiesim_machine_init
)