1 | /* |
2 | * QEMU/moxiesim emulation |
3 | * |
4 | * Emulates a very simple machine model similar to the one used by the |
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 | |
28 | #include "qemu/osdep.h" |
29 | #include "qemu/error-report.h" |
30 | #include "qapi/error.h" |
31 | #include "cpu.h" |
32 | #include "hw/sysbus.h" |
33 | #include "net/net.h" |
34 | #include "sysemu/reset.h" |
35 | #include "sysemu/sysemu.h" |
36 | #include "hw/boards.h" |
37 | #include "hw/loader.h" |
38 | #include "hw/char/serial.h" |
39 | #include "exec/address-spaces.h" |
40 | #include "elf.h" |
41 | |
42 | #define PHYS_MEM_BASE 0x80000000 |
43 | #define FIRMWARE_BASE 0x1000 |
44 | #define FIRMWARE_SIZE (128 * 0x1000) |
45 | |
46 | typedef struct { |
47 | uint64_t ram_size; |
48 | const char *kernel_filename; |
49 | const char *kernel_cmdline; |
50 | const char *initrd_filename; |
51 | } LoaderParams; |
52 | |
53 | static void load_kernel(MoxieCPU *cpu, LoaderParams *loader_params) |
54 | { |
55 | uint64_t entry, kernel_low, kernel_high; |
56 | int64_t initrd_size; |
57 | long kernel_size; |
58 | ram_addr_t initrd_offset; |
59 | |
60 | kernel_size = load_elf(loader_params->kernel_filename, NULL, NULL, NULL, |
61 | &entry, &kernel_low, &kernel_high, 1, EM_MOXIE, |
62 | 0, 0); |
63 | |
64 | if (kernel_size <= 0) { |
65 | error_report("could not load kernel '%s'" , |
66 | loader_params->kernel_filename); |
67 | exit(1); |
68 | } |
69 | |
70 | /* load initrd */ |
71 | initrd_size = 0; |
72 | initrd_offset = 0; |
73 | if (loader_params->initrd_filename) { |
74 | initrd_size = get_image_size(loader_params->initrd_filename); |
75 | if (initrd_size > 0) { |
76 | initrd_offset = (kernel_high + ~TARGET_PAGE_MASK) |
77 | & TARGET_PAGE_MASK; |
78 | if (initrd_offset + initrd_size > loader_params->ram_size) { |
79 | error_report("memory too small for initial ram disk '%s'" , |
80 | loader_params->initrd_filename); |
81 | exit(1); |
82 | } |
83 | initrd_size = load_image_targphys(loader_params->initrd_filename, |
84 | initrd_offset, |
85 | ram_size); |
86 | } |
87 | if (initrd_size == (target_ulong)-1) { |
88 | error_report("could not load initial ram disk '%s'" , |
89 | loader_params->initrd_filename); |
90 | exit(1); |
91 | } |
92 | } |
93 | } |
94 | |
95 | static void main_cpu_reset(void *opaque) |
96 | { |
97 | MoxieCPU *cpu = opaque; |
98 | |
99 | cpu_reset(CPU(cpu)); |
100 | } |
101 | |
102 | static void moxiesim_init(MachineState *machine) |
103 | { |
104 | MoxieCPU *cpu = NULL; |
105 | ram_addr_t ram_size = machine->ram_size; |
106 | const char *kernel_filename = machine->kernel_filename; |
107 | const char *kernel_cmdline = machine->kernel_cmdline; |
108 | const char *initrd_filename = machine->initrd_filename; |
109 | CPUMoxieState *env; |
110 | MemoryRegion *address_space_mem = get_system_memory(); |
111 | MemoryRegion *ram = g_new(MemoryRegion, 1); |
112 | MemoryRegion *rom = g_new(MemoryRegion, 1); |
113 | hwaddr ram_base = 0x200000; |
114 | LoaderParams loader_params; |
115 | |
116 | /* Init CPUs. */ |
117 | cpu = MOXIE_CPU(cpu_create(machine->cpu_type)); |
118 | env = &cpu->env; |
119 | |
120 | qemu_register_reset(main_cpu_reset, cpu); |
121 | |
122 | /* Allocate RAM. */ |
123 | memory_region_init_ram(ram, NULL, "moxiesim.ram" , ram_size, &error_fatal); |
124 | memory_region_add_subregion(address_space_mem, ram_base, ram); |
125 | |
126 | memory_region_init_ram(rom, NULL, "moxie.rom" , FIRMWARE_SIZE, &error_fatal); |
127 | memory_region_add_subregion(get_system_memory(), FIRMWARE_BASE, rom); |
128 | |
129 | if (kernel_filename) { |
130 | loader_params.ram_size = ram_size; |
131 | loader_params.kernel_filename = kernel_filename; |
132 | loader_params.kernel_cmdline = kernel_cmdline; |
133 | loader_params.initrd_filename = initrd_filename; |
134 | load_kernel(cpu, &loader_params); |
135 | } |
136 | if (bios_name) { |
137 | if (load_image_targphys(bios_name, FIRMWARE_BASE, FIRMWARE_SIZE) < 0) { |
138 | error_report("Failed to load firmware '%s'" , bios_name); |
139 | } |
140 | } |
141 | |
142 | /* A single 16450 sits at offset 0x3f8. */ |
143 | if (serial_hd(0)) { |
144 | serial_mm_init(address_space_mem, 0x3f8, 0, env->irq[4], |
145 | 8000000/16, serial_hd(0), DEVICE_LITTLE_ENDIAN); |
146 | } |
147 | } |
148 | |
149 | static void moxiesim_machine_init(MachineClass *mc) |
150 | { |
151 | mc->desc = "Moxie simulator platform" ; |
152 | mc->init = moxiesim_init; |
153 | mc->is_default = 1; |
154 | mc->default_cpu_type = MOXIE_CPU_TYPE_NAME("MoxieLite" ); |
155 | } |
156 | |
157 | DEFINE_MACHINE("moxiesim" , moxiesim_machine_init) |
158 | |