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1 | /* | |
2 | * Copyright (c) 2011, Max Filippov, Open Source and Linux Lab. | |
3 | * All rights reserved. | |
4 | * | |
5 | * Redistribution and use in source and binary forms, with or without | |
6 | * modification, are permitted provided that the following conditions are met: | |
7 | * * Redistributions of source code must retain the above copyright | |
8 | * notice, this list of conditions and the following disclaimer. | |
9 | * * Redistributions in binary form must reproduce the above copyright | |
10 | * notice, this list of conditions and the following disclaimer in the | |
11 | * documentation and/or other materials provided with the distribution. | |
12 | * * Neither the name of the Open Source and Linux Lab nor the | |
13 | * names of its contributors may be used to endorse or promote products | |
14 | * derived from this software without specific prior written permission. | |
15 | * | |
16 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
17 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
18 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
19 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY | |
20 | * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | |
21 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
22 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND | |
23 | * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
24 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
25 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
26 | */ | |
27 | ||
28 | #include "sysemu.h" | |
29 | #include "boards.h" | |
30 | #include "loader.h" | |
31 | #include "elf.h" | |
32 | #include "memory.h" | |
33 | #include "exec-memory.h" | |
34 | ||
35 | static uint64_t translate_phys_addr(void *env, uint64_t addr) | |
36 | { | |
37 | return cpu_get_phys_page_debug(env, addr); | |
38 | } | |
39 | ||
40 | static void sim_reset(void *opaque) | |
41 | { | |
42 | XtensaCPU *cpu = opaque; | |
43 | ||
44 | cpu_reset(CPU(cpu)); | |
45 | } | |
46 | ||
47 | static void xtensa_sim_init(QEMUMachineInitArgs *args) | |
48 | { | |
49 | XtensaCPU *cpu = NULL; | |
50 | CPUXtensaState *env = NULL; | |
51 | MemoryRegion *ram, *rom; | |
52 | ram_addr_t ram_size = args->ram_size; | |
53 | const char *cpu_model = args->cpu_model; | |
54 | const char *kernel_filename = args->kernel_filename; | |
55 | int n; | |
56 | ||
57 | if (!cpu_model) { | |
58 | cpu_model = XTENSA_DEFAULT_CPU_MODEL; | |
59 | } | |
60 | ||
61 | for (n = 0; n < smp_cpus; n++) { | |
62 | cpu = cpu_xtensa_init(cpu_model); | |
63 | if (cpu == NULL) { | |
64 | fprintf(stderr, "Unable to find CPU definition\n"); | |
65 | exit(1); | |
66 | } | |
67 | env = &cpu->env; | |
68 | ||
69 | env->sregs[PRID] = n; | |
70 | qemu_register_reset(sim_reset, cpu); | |
71 | /* Need MMU initialized prior to ELF loading, | |
72 | * so that ELF gets loaded into virtual addresses | |
73 | */ | |
74 | sim_reset(cpu); | |
75 | } | |
76 | ||
77 | ram = g_malloc(sizeof(*ram)); | |
78 | memory_region_init_ram(ram, "xtensa.sram", ram_size); | |
79 | vmstate_register_ram_global(ram); | |
80 | memory_region_add_subregion(get_system_memory(), 0, ram); | |
81 | ||
82 | rom = g_malloc(sizeof(*rom)); | |
83 | memory_region_init_ram(rom, "xtensa.rom", 0x1000); | |
84 | vmstate_register_ram_global(rom); | |
85 | memory_region_add_subregion(get_system_memory(), 0xfe000000, rom); | |
86 | ||
87 | if (kernel_filename) { | |
88 | uint64_t elf_entry; | |
89 | uint64_t elf_lowaddr; | |
90 | #ifdef TARGET_WORDS_BIGENDIAN | |
91 | int success = load_elf(kernel_filename, translate_phys_addr, env, | |
92 | &elf_entry, &elf_lowaddr, NULL, 1, ELF_MACHINE, 0); | |
93 | #else | |
94 | int success = load_elf(kernel_filename, translate_phys_addr, env, | |
95 | &elf_entry, &elf_lowaddr, NULL, 0, ELF_MACHINE, 0); | |
96 | #endif | |
97 | if (success > 0) { | |
98 | env->pc = elf_entry; | |
99 | } | |
100 | } | |
101 | } | |
102 | ||
103 | static QEMUMachine xtensa_sim_machine = { | |
104 | .name = "sim", | |
105 | .desc = "sim machine (" XTENSA_DEFAULT_CPU_MODEL ")", | |
106 | .is_default = true, | |
107 | .init = xtensa_sim_init, | |
108 | .max_cpus = 4, | |
109 | }; | |
110 | ||
111 | static void xtensa_sim_machine_init(void) | |
112 | { | |
113 | qemu_register_machine(&xtensa_sim_machine); | |
114 | } | |
115 | ||
116 | machine_init(xtensa_sim_machine_init); |