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Annotation of qemu/hw/xtensa_sim.c, revision 1.1

1.1     ! root        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 *env)
        !            41: {
        !            42:     cpu_reset(env);
        !            43: }
        !            44: 
        !            45: static void sim_init(ram_addr_t ram_size,
        !            46:         const char *boot_device,
        !            47:         const char *kernel_filename, const char *kernel_cmdline,
        !            48:         const char *initrd_filename, const char *cpu_model)
        !            49: {
        !            50:     CPUState *env = NULL;
        !            51:     MemoryRegion *ram, *rom;
        !            52:     int n;
        !            53: 
        !            54:     for (n = 0; n < smp_cpus; n++) {
        !            55:         env = cpu_init(cpu_model);
        !            56:         if (!env) {
        !            57:             fprintf(stderr, "Unable to find CPU definition\n");
        !            58:             exit(1);
        !            59:         }
        !            60:         env->sregs[PRID] = n;
        !            61:         qemu_register_reset(sim_reset, env);
        !            62:         /* Need MMU initialized prior to ELF loading,
        !            63:          * so that ELF gets loaded into virtual addresses
        !            64:          */
        !            65:         sim_reset(env);
        !            66:     }
        !            67: 
        !            68:     ram = g_malloc(sizeof(*ram));
        !            69:     memory_region_init_ram(ram, NULL, "xtensa.sram", ram_size);
        !            70:     memory_region_add_subregion(get_system_memory(), 0, ram);
        !            71: 
        !            72:     rom = g_malloc(sizeof(*rom));
        !            73:     memory_region_init_ram(rom, NULL, "xtensa.rom", 0x1000);
        !            74:     memory_region_add_subregion(get_system_memory(), 0xfe000000, rom);
        !            75: 
        !            76:     if (kernel_filename) {
        !            77:         uint64_t elf_entry;
        !            78:         uint64_t elf_lowaddr;
        !            79: #ifdef TARGET_WORDS_BIGENDIAN
        !            80:         int success = load_elf(kernel_filename, translate_phys_addr, env,
        !            81:                 &elf_entry, &elf_lowaddr, NULL, 1, ELF_MACHINE, 0);
        !            82: #else
        !            83:         int success = load_elf(kernel_filename, translate_phys_addr, env,
        !            84:                 &elf_entry, &elf_lowaddr, NULL, 0, ELF_MACHINE, 0);
        !            85: #endif
        !            86:         if (success > 0) {
        !            87:             env->pc = elf_entry;
        !            88:         }
        !            89:     }
        !            90: }
        !            91: 
        !            92: static void xtensa_sim_init(ram_addr_t ram_size,
        !            93:                      const char *boot_device,
        !            94:                      const char *kernel_filename, const char *kernel_cmdline,
        !            95:                      const char *initrd_filename, const char *cpu_model)
        !            96: {
        !            97:     if (!cpu_model) {
        !            98:         cpu_model = "dc232b";
        !            99:     }
        !           100:     sim_init(ram_size, boot_device, kernel_filename, kernel_cmdline,
        !           101:             initrd_filename, cpu_model);
        !           102: }
        !           103: 
        !           104: static QEMUMachine xtensa_sim_machine = {
        !           105:     .name = "sim",
        !           106:     .desc = "sim machine (dc232b)",
        !           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);

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