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Annotation of qemu/hw/xtensa_sim.c, revision 1.1.1.1

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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