| /* |
| * Nios2 kernel loader |
| * |
| * Copyright (c) 2016 Marek Vasut <marek.vasut@gmail.com> |
| * |
| * Based on microblaze kernel loader |
| * |
| * Copyright (c) 2012 Peter Crosthwaite <peter.crosthwaite@petalogix.com> |
| * Copyright (c) 2012 PetaLogix |
| * Copyright (c) 2009 Edgar E. Iglesias. |
| * |
| * 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 "qemu/osdep.h" |
| #include "qemu/units.h" |
| #include "qemu-common.h" |
| #include "cpu.h" |
| #include "qemu/option.h" |
| #include "qemu/config-file.h" |
| #include "qemu/error-report.h" |
| #include "sysemu/device_tree.h" |
| #include "sysemu/reset.h" |
| #include "sysemu/sysemu.h" |
| #include "hw/loader.h" |
| #include "elf.h" |
| |
| #include "boot.h" |
| |
| #define NIOS2_MAGIC 0x534f494e |
| |
| static struct nios2_boot_info { |
| void (*machine_cpu_reset)(Nios2CPU *); |
| uint32_t bootstrap_pc; |
| uint32_t cmdline; |
| uint32_t initrd_start; |
| uint32_t initrd_end; |
| uint32_t fdt; |
| } boot_info; |
| |
| static void main_cpu_reset(void *opaque) |
| { |
| Nios2CPU *cpu = opaque; |
| CPUState *cs = CPU(cpu); |
| CPUNios2State *env = &cpu->env; |
| |
| cpu_reset(CPU(cpu)); |
| |
| env->regs[R_ARG0] = NIOS2_MAGIC; |
| env->regs[R_ARG1] = boot_info.initrd_start; |
| env->regs[R_ARG2] = boot_info.fdt; |
| env->regs[R_ARG3] = boot_info.cmdline; |
| |
| cpu_set_pc(cs, boot_info.bootstrap_pc); |
| if (boot_info.machine_cpu_reset) { |
| boot_info.machine_cpu_reset(cpu); |
| } |
| } |
| |
| static uint64_t translate_kernel_address(void *opaque, uint64_t addr) |
| { |
| return addr - 0xc0000000LL; |
| } |
| |
| static int nios2_load_dtb(struct nios2_boot_info bi, const uint32_t ramsize, |
| const char *kernel_cmdline, const char *dtb_filename) |
| { |
| int fdt_size; |
| void *fdt = NULL; |
| int r; |
| |
| if (dtb_filename) { |
| fdt = load_device_tree(dtb_filename, &fdt_size); |
| } |
| if (!fdt) { |
| return 0; |
| } |
| |
| if (kernel_cmdline) { |
| r = qemu_fdt_setprop_string(fdt, "/chosen", "bootargs", |
| kernel_cmdline); |
| if (r < 0) { |
| fprintf(stderr, "couldn't set /chosen/bootargs\n"); |
| } |
| } |
| |
| if (bi.initrd_start) { |
| qemu_fdt_setprop_cell(fdt, "/chosen", "linux,initrd-start", |
| translate_kernel_address(NULL, bi.initrd_start)); |
| |
| qemu_fdt_setprop_cell(fdt, "/chosen", "linux,initrd-end", |
| translate_kernel_address(NULL, bi.initrd_end)); |
| } |
| |
| cpu_physical_memory_write(bi.fdt, fdt, fdt_size); |
| g_free(fdt); |
| return fdt_size; |
| } |
| |
| void nios2_load_kernel(Nios2CPU *cpu, hwaddr ddr_base, |
| uint32_t ramsize, |
| const char *initrd_filename, |
| const char *dtb_filename, |
| void (*machine_cpu_reset)(Nios2CPU *)) |
| { |
| QemuOpts *machine_opts; |
| const char *kernel_filename; |
| const char *kernel_cmdline; |
| const char *dtb_arg; |
| char *filename = NULL; |
| |
| machine_opts = qemu_get_machine_opts(); |
| kernel_filename = qemu_opt_get(machine_opts, "kernel"); |
| kernel_cmdline = qemu_opt_get(machine_opts, "append"); |
| dtb_arg = qemu_opt_get(machine_opts, "dtb"); |
| /* default to pcbios dtb as passed by machine_init */ |
| if (!dtb_arg) { |
| filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, dtb_filename); |
| } |
| |
| boot_info.machine_cpu_reset = machine_cpu_reset; |
| qemu_register_reset(main_cpu_reset, cpu); |
| |
| if (kernel_filename) { |
| int kernel_size, fdt_size; |
| uint64_t entry, low, high; |
| int big_endian = 0; |
| |
| #ifdef TARGET_WORDS_BIGENDIAN |
| big_endian = 1; |
| #endif |
| |
| /* Boots a kernel elf binary. */ |
| kernel_size = load_elf(kernel_filename, NULL, NULL, NULL, |
| &entry, &low, &high, NULL, |
| big_endian, EM_ALTERA_NIOS2, 0, 0); |
| if ((uint32_t)entry == 0xc0000000) { |
| /* |
| * The Nios II processor reference guide documents that the |
| * kernel is placed at virtual memory address 0xc0000000, |
| * and we've got something that points there. Reload it |
| * and adjust the entry to get the address in physical RAM. |
| */ |
| kernel_size = load_elf(kernel_filename, NULL, |
| translate_kernel_address, NULL, |
| &entry, NULL, NULL, NULL, |
| big_endian, EM_ALTERA_NIOS2, 0, 0); |
| boot_info.bootstrap_pc = ddr_base + 0xc0000000 + |
| (entry & 0x07ffffff); |
| } else { |
| /* Use the entry point in the ELF image. */ |
| boot_info.bootstrap_pc = (uint32_t)entry; |
| } |
| |
| /* If it wasn't an ELF image, try an u-boot image. */ |
| if (kernel_size < 0) { |
| hwaddr uentry, loadaddr = LOAD_UIMAGE_LOADADDR_INVALID; |
| |
| kernel_size = load_uimage(kernel_filename, &uentry, &loadaddr, 0, |
| NULL, NULL); |
| boot_info.bootstrap_pc = uentry; |
| high = loadaddr + kernel_size; |
| } |
| |
| /* Not an ELF image nor an u-boot image, try a RAW image. */ |
| if (kernel_size < 0) { |
| kernel_size = load_image_targphys(kernel_filename, ddr_base, |
| ram_size); |
| boot_info.bootstrap_pc = ddr_base; |
| high = ddr_base + kernel_size; |
| } |
| |
| high = ROUND_UP(high, 1 * MiB); |
| |
| /* If initrd is available, it goes after the kernel, aligned to 1M. */ |
| if (initrd_filename) { |
| int initrd_size; |
| uint32_t initrd_offset; |
| |
| boot_info.initrd_start = high; |
| initrd_offset = boot_info.initrd_start - ddr_base; |
| |
| initrd_size = load_ramdisk(initrd_filename, |
| boot_info.initrd_start, |
| ram_size - initrd_offset); |
| if (initrd_size < 0) { |
| initrd_size = load_image_targphys(initrd_filename, |
| boot_info.initrd_start, |
| ram_size - initrd_offset); |
| } |
| if (initrd_size < 0) { |
| error_report("could not load initrd '%s'", |
| initrd_filename); |
| exit(EXIT_FAILURE); |
| } |
| high += initrd_size; |
| } |
| high = ROUND_UP(high, 4); |
| boot_info.initrd_end = high; |
| |
| /* Device tree must be placed right after initrd (if available) */ |
| boot_info.fdt = high; |
| fdt_size = nios2_load_dtb(boot_info, ram_size, kernel_cmdline, |
| /* Preference a -dtb argument */ |
| dtb_arg ? dtb_arg : filename); |
| high += fdt_size; |
| |
| /* Kernel command is at the end, 4k aligned. */ |
| boot_info.cmdline = ROUND_UP(high, 4 * KiB); |
| if (kernel_cmdline && strlen(kernel_cmdline)) { |
| pstrcpy_targphys("cmdline", boot_info.cmdline, 256, kernel_cmdline); |
| } |
| } |
| g_free(filename); |
| } |
