| /* |
| * QEMU/mipssim emulation |
| * |
| * Emulates a very simple machine model similiar to the one use by the |
| * proprietary MIPS emulator. |
| * |
| * Copyright (c) 2007 Thiemo Seufer |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a copy |
| * of this software and associated documentation files (the "Software"), to deal |
| * in the Software without restriction, including without limitation the rights |
| * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| * copies of the Software, and to permit persons to whom the Software is |
| * furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| * THE SOFTWARE. |
| */ |
| #include "hw.h" |
| #include "mips.h" |
| #include "pc.h" |
| #include "isa.h" |
| #include "net.h" |
| #include "sysemu.h" |
| #include "boards.h" |
| |
| #ifdef TARGET_WORDS_BIGENDIAN |
| #define BIOS_FILENAME "mips_bios.bin" |
| #else |
| #define BIOS_FILENAME "mipsel_bios.bin" |
| #endif |
| |
| #ifdef TARGET_MIPS64 |
| #define PHYS_TO_VIRT(x) ((x) | ~0x7fffffffULL) |
| #else |
| #define PHYS_TO_VIRT(x) ((x) | ~0x7fffffffU) |
| #endif |
| |
| #define VIRT_TO_PHYS_ADDEND (-((int64_t)(int32_t)0x80000000)) |
| |
| static struct _loaderparams { |
| int ram_size; |
| const char *kernel_filename; |
| const char *kernel_cmdline; |
| const char *initrd_filename; |
| } loaderparams; |
| |
| static void load_kernel (CPUState *env) |
| { |
| int64_t entry, kernel_low, kernel_high; |
| long kernel_size; |
| long initrd_size; |
| ram_addr_t initrd_offset; |
| |
| kernel_size = load_elf(loaderparams.kernel_filename, VIRT_TO_PHYS_ADDEND, |
| (uint64_t *)&entry, (uint64_t *)&kernel_low, |
| (uint64_t *)&kernel_high); |
| if (kernel_size >= 0) { |
| if ((entry & ~0x7fffffffULL) == 0x80000000) |
| entry = (int32_t)entry; |
| env->active_tc.PC = entry; |
| } else { |
| fprintf(stderr, "qemu: could not load kernel '%s'\n", |
| loaderparams.kernel_filename); |
| exit(1); |
| } |
| |
| /* load initrd */ |
| initrd_size = 0; |
| initrd_offset = 0; |
| if (loaderparams.initrd_filename) { |
| initrd_size = get_image_size (loaderparams.initrd_filename); |
| if (initrd_size > 0) { |
| initrd_offset = (kernel_high + ~TARGET_PAGE_MASK) & TARGET_PAGE_MASK; |
| if (initrd_offset + initrd_size > loaderparams.ram_size) { |
| fprintf(stderr, |
| "qemu: memory too small for initial ram disk '%s'\n", |
| loaderparams.initrd_filename); |
| exit(1); |
| } |
| initrd_size = load_image(loaderparams.initrd_filename, |
| phys_ram_base + initrd_offset); |
| } |
| if (initrd_size == (target_ulong) -1) { |
| fprintf(stderr, "qemu: could not load initial ram disk '%s'\n", |
| loaderparams.initrd_filename); |
| exit(1); |
| } |
| } |
| } |
| |
| static void main_cpu_reset(void *opaque) |
| { |
| CPUState *env = opaque; |
| cpu_reset(env); |
| |
| if (loaderparams.kernel_filename) |
| load_kernel (env); |
| } |
| |
| static void |
| mips_mipssim_init (ram_addr_t ram_size, int vga_ram_size, |
| const char *boot_device, |
| const char *kernel_filename, const char *kernel_cmdline, |
| const char *initrd_filename, const char *cpu_model) |
| { |
| char buf[1024]; |
| unsigned long bios_offset; |
| CPUState *env; |
| int bios_size; |
| |
| /* Init CPUs. */ |
| if (cpu_model == NULL) { |
| #ifdef TARGET_MIPS64 |
| cpu_model = "5Kf"; |
| #else |
| cpu_model = "24Kf"; |
| #endif |
| } |
| env = cpu_init(cpu_model); |
| if (!env) { |
| fprintf(stderr, "Unable to find CPU definition\n"); |
| exit(1); |
| } |
| qemu_register_reset(main_cpu_reset, env); |
| |
| /* Allocate RAM. */ |
| cpu_register_physical_memory(0, ram_size, IO_MEM_RAM); |
| |
| /* Load a BIOS / boot exception handler image. */ |
| bios_offset = ram_size + vga_ram_size; |
| if (bios_name == NULL) |
| bios_name = BIOS_FILENAME; |
| snprintf(buf, sizeof(buf), "%s/%s", bios_dir, bios_name); |
| bios_size = load_image(buf, phys_ram_base + bios_offset); |
| if ((bios_size < 0 || bios_size > BIOS_SIZE) && !kernel_filename) { |
| /* Bail out if we have neither a kernel image nor boot vector code. */ |
| fprintf(stderr, |
| "qemu: Could not load MIPS bios '%s', and no -kernel argument was specified\n", |
| buf); |
| exit(1); |
| } else { |
| /* Map the BIOS / boot exception handler. */ |
| cpu_register_physical_memory(0x1fc00000LL, |
| bios_size, bios_offset | IO_MEM_ROM); |
| /* We have a boot vector start address. */ |
| env->active_tc.PC = (target_long)(int32_t)0xbfc00000; |
| } |
| |
| if (kernel_filename) { |
| loaderparams.ram_size = ram_size; |
| loaderparams.kernel_filename = kernel_filename; |
| loaderparams.kernel_cmdline = kernel_cmdline; |
| loaderparams.initrd_filename = initrd_filename; |
| load_kernel(env); |
| } |
| |
| /* Init CPU internal devices. */ |
| cpu_mips_irq_init_cpu(env); |
| cpu_mips_clock_init(env); |
| |
| /* Register 64 KB of ISA IO space at 0x1fd00000. */ |
| isa_mmio_init(0x1fd00000, 0x00010000); |
| |
| /* A single 16450 sits at offset 0x3f8. It is attached to |
| MIPS CPU INT2, which is interrupt 4. */ |
| if (serial_hds[0]) |
| serial_init(0x3f8, env->irq[4], 115200, serial_hds[0]); |
| |
| if (nd_table[0].vlan) |
| /* MIPSnet uses the MIPS CPU INT0, which is interrupt 2. */ |
| mipsnet_init(0x4200, env->irq[2], &nd_table[0]); |
| } |
| |
| QEMUMachine mips_mipssim_machine = { |
| .name = "mipssim", |
| .desc = "MIPS MIPSsim platform", |
| .init = mips_mipssim_init, |
| .ram_require = BIOS_SIZE + VGA_RAM_SIZE /* unused */, |
| }; |