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a360d965 AG |
1 | /* |
2 | * QEMU/moxiesim emulation | |
3 | * | |
805a2505 | 4 | * Emulates a very simple machine model similar to the one used by the |
a360d965 AG |
5 | * GDB moxie simulator. |
6 | * | |
7 | * Copyright (c) 2008, 2009, 2010, 2013 Anthony Green | |
8 | * | |
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: | |
15 | * | |
16 | * The above copyright notice and this permission notice shall be included in | |
17 | * all copies or substantial portions of the Software. | |
18 | * | |
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 | |
25 | * THE SOFTWARE. | |
26 | */ | |
27 | #include "hw/sysbus.h" | |
28 | #include "hw/hw.h" | |
0d09e41a PB |
29 | #include "hw/i386/pc.h" |
30 | #include "hw/isa/isa.h" | |
a360d965 AG |
31 | #include "net/net.h" |
32 | #include "sysemu/sysemu.h" | |
33 | #include "hw/boards.h" | |
34 | #include "hw/loader.h" | |
0d09e41a | 35 | #include "hw/char/serial.h" |
a360d965 AG |
36 | #include "exec/address-spaces.h" |
37 | ||
38 | #define PHYS_MEM_BASE 0x80000000 | |
39 | ||
40 | typedef struct { | |
41 | uint64_t ram_size; | |
42 | const char *kernel_filename; | |
43 | const char *kernel_cmdline; | |
44 | const char *initrd_filename; | |
45 | } LoaderParams; | |
46 | ||
47 | static void load_kernel(MoxieCPU *cpu, LoaderParams *loader_params) | |
48 | { | |
49 | uint64_t entry, kernel_low, kernel_high; | |
50 | long kernel_size; | |
51 | long initrd_size; | |
52 | ram_addr_t initrd_offset; | |
53 | ||
54 | kernel_size = load_elf(loader_params->kernel_filename, NULL, NULL, | |
55 | &entry, &kernel_low, &kernel_high, 1, | |
56 | ELF_MACHINE, 0); | |
57 | ||
58 | if (!kernel_size) { | |
59 | fprintf(stderr, "qemu: could not load kernel '%s'\n", | |
60 | loader_params->kernel_filename); | |
61 | exit(1); | |
62 | } | |
63 | ||
64 | /* load initrd */ | |
65 | initrd_size = 0; | |
66 | initrd_offset = 0; | |
67 | if (loader_params->initrd_filename) { | |
68 | initrd_size = get_image_size(loader_params->initrd_filename); | |
69 | if (initrd_size > 0) { | |
70 | initrd_offset = (kernel_high + ~TARGET_PAGE_MASK) | |
71 | & TARGET_PAGE_MASK; | |
72 | if (initrd_offset + initrd_size > loader_params->ram_size) { | |
73 | fprintf(stderr, | |
74 | "qemu: memory too small for initial ram disk '%s'\n", | |
75 | loader_params->initrd_filename); | |
76 | exit(1); | |
77 | } | |
78 | initrd_size = load_image_targphys(loader_params->initrd_filename, | |
79 | initrd_offset, | |
80 | ram_size); | |
81 | } | |
82 | if (initrd_size == (target_ulong)-1) { | |
83 | fprintf(stderr, "qemu: could not load initial ram disk '%s'\n", | |
84 | loader_params->initrd_filename); | |
85 | exit(1); | |
86 | } | |
87 | } | |
88 | } | |
89 | ||
90 | static void main_cpu_reset(void *opaque) | |
91 | { | |
92 | MoxieCPU *cpu = opaque; | |
93 | ||
94 | cpu_reset(CPU(cpu)); | |
95 | } | |
96 | ||
97 | static inline DeviceState * | |
98 | moxie_intc_create(hwaddr base, qemu_irq irq, int kind_of_intr) | |
99 | { | |
100 | DeviceState *dev; | |
101 | ||
102 | dev = qdev_create(NULL, "moxie,intc"); | |
103 | qdev_prop_set_uint32(dev, "kind-of-intr", kind_of_intr); | |
104 | qdev_init_nofail(dev); | |
105 | sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, base); | |
106 | sysbus_connect_irq(SYS_BUS_DEVICE(dev), 0, irq); | |
107 | return dev; | |
108 | } | |
109 | ||
110 | static void moxiesim_init(QEMUMachineInitArgs *args) | |
111 | { | |
112 | MoxieCPU *cpu = NULL; | |
113 | ram_addr_t ram_size = args->ram_size; | |
114 | const char *cpu_model = args->cpu_model; | |
115 | const char *kernel_filename = args->kernel_filename; | |
116 | const char *kernel_cmdline = args->kernel_cmdline; | |
117 | const char *initrd_filename = args->initrd_filename; | |
118 | CPUMoxieState *env; | |
119 | MemoryRegion *address_space_mem = get_system_memory(); | |
120 | MemoryRegion *ram = g_new(MemoryRegion, 1); | |
121 | MemoryRegion *rom = g_new(MemoryRegion, 1); | |
122 | hwaddr ram_base = 0x200000; | |
123 | LoaderParams loader_params; | |
124 | ||
125 | /* Init CPUs. */ | |
126 | if (cpu_model == NULL) { | |
127 | cpu_model = "MoxieLite-moxie-cpu"; | |
128 | } | |
129 | cpu = cpu_moxie_init(cpu_model); | |
130 | if (!cpu) { | |
131 | fprintf(stderr, "Unable to find CPU definition\n"); | |
132 | exit(1); | |
133 | } | |
134 | env = &cpu->env; | |
135 | ||
136 | qemu_register_reset(main_cpu_reset, cpu); | |
137 | ||
138 | /* Allocate RAM. */ | |
2c9b15ca | 139 | memory_region_init_ram(ram, NULL, "moxiesim.ram", ram_size); |
a360d965 AG |
140 | vmstate_register_ram_global(ram); |
141 | memory_region_add_subregion(address_space_mem, ram_base, ram); | |
142 | ||
2c9b15ca | 143 | memory_region_init_ram(rom, NULL, "moxie.rom", 128*0x1000); |
a360d965 AG |
144 | vmstate_register_ram_global(rom); |
145 | memory_region_add_subregion(get_system_memory(), 0x1000, rom); | |
146 | ||
147 | if (kernel_filename) { | |
148 | loader_params.ram_size = ram_size; | |
149 | loader_params.kernel_filename = kernel_filename; | |
150 | loader_params.kernel_cmdline = kernel_cmdline; | |
151 | loader_params.initrd_filename = initrd_filename; | |
152 | load_kernel(cpu, &loader_params); | |
153 | } | |
154 | ||
155 | /* A single 16450 sits at offset 0x3f8. */ | |
156 | if (serial_hds[0]) { | |
157 | serial_mm_init(address_space_mem, 0x3f8, 0, env->irq[4], | |
158 | 8000000/16, serial_hds[0], DEVICE_LITTLE_ENDIAN); | |
159 | } | |
160 | } | |
161 | ||
162 | static QEMUMachine moxiesim_machine = { | |
163 | .name = "moxiesim", | |
164 | .desc = "Moxie simulator platform", | |
165 | .init = moxiesim_init, | |
166 | .is_default = 1, | |
167 | }; | |
168 | ||
169 | static void moxie_machine_init(void) | |
170 | { | |
171 | qemu_register_machine(&moxiesim_machine); | |
172 | } | |
173 | ||
174 | machine_init(moxie_machine_init) |