Marek Vasut | b786256 | 2017-01-18 23:01:45 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Nios2 kernel loader |
| 3 | * |
| 4 | * Copyright (c) 2016 Marek Vasut <marek.vasut@gmail.com> |
| 5 | * |
| 6 | * Based on microblaze kernel loader |
| 7 | * |
| 8 | * Copyright (c) 2012 Peter Crosthwaite <peter.crosthwaite@petalogix.com> |
| 9 | * Copyright (c) 2012 PetaLogix |
| 10 | * Copyright (c) 2009 Edgar E. Iglesias. |
| 11 | * |
| 12 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 13 | * of this software and associated documentation files (the "Software"), to deal |
| 14 | * in the Software without restriction, including without limitation the rights |
| 15 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 16 | * copies of the Software, and to permit persons to whom the Software is |
| 17 | * furnished to do so, subject to the following conditions: |
| 18 | * |
| 19 | * The above copyright notice and this permission notice shall be included in |
| 20 | * all copies or substantial portions of the Software. |
| 21 | * |
| 22 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 23 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 24 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 25 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 26 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 27 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| 28 | * THE SOFTWARE. |
| 29 | */ |
| 30 | |
| 31 | #include "qemu/osdep.h" |
Philippe Mathieu-Daudé | a3c81ef | 2018-06-25 09:42:17 -0300 | [diff] [blame] | 32 | #include "qemu/units.h" |
Marek Vasut | b786256 | 2017-01-18 23:01:45 +0100 | [diff] [blame] | 33 | #include "qemu-common.h" |
| 34 | #include "cpu.h" |
| 35 | #include "qemu/option.h" |
| 36 | #include "qemu/config-file.h" |
| 37 | #include "qemu/error-report.h" |
Marek Vasut | b786256 | 2017-01-18 23:01:45 +0100 | [diff] [blame] | 38 | #include "sysemu/device_tree.h" |
| 39 | #include "sysemu/sysemu.h" |
| 40 | #include "hw/loader.h" |
| 41 | #include "elf.h" |
Marek Vasut | b786256 | 2017-01-18 23:01:45 +0100 | [diff] [blame] | 42 | |
| 43 | #include "boot.h" |
| 44 | |
| 45 | #define NIOS2_MAGIC 0x534f494e |
| 46 | |
| 47 | static struct nios2_boot_info { |
| 48 | void (*machine_cpu_reset)(Nios2CPU *); |
| 49 | uint32_t bootstrap_pc; |
| 50 | uint32_t cmdline; |
| 51 | uint32_t initrd_start; |
| 52 | uint32_t initrd_end; |
| 53 | uint32_t fdt; |
| 54 | } boot_info; |
| 55 | |
| 56 | static void main_cpu_reset(void *opaque) |
| 57 | { |
| 58 | Nios2CPU *cpu = opaque; |
| 59 | CPUState *cs = CPU(cpu); |
| 60 | CPUNios2State *env = &cpu->env; |
| 61 | |
| 62 | cpu_reset(CPU(cpu)); |
| 63 | |
| 64 | env->regs[R_ARG0] = NIOS2_MAGIC; |
| 65 | env->regs[R_ARG1] = boot_info.initrd_start; |
| 66 | env->regs[R_ARG2] = boot_info.fdt; |
| 67 | env->regs[R_ARG3] = boot_info.cmdline; |
| 68 | |
| 69 | cpu_set_pc(cs, boot_info.bootstrap_pc); |
| 70 | if (boot_info.machine_cpu_reset) { |
| 71 | boot_info.machine_cpu_reset(cpu); |
| 72 | } |
| 73 | } |
| 74 | |
| 75 | static uint64_t translate_kernel_address(void *opaque, uint64_t addr) |
| 76 | { |
| 77 | return addr - 0xc0000000LL; |
| 78 | } |
| 79 | |
| 80 | static int nios2_load_dtb(struct nios2_boot_info bi, const uint32_t ramsize, |
| 81 | const char *kernel_cmdline, const char *dtb_filename) |
| 82 | { |
| 83 | int fdt_size; |
| 84 | void *fdt = NULL; |
| 85 | int r; |
| 86 | |
| 87 | if (dtb_filename) { |
| 88 | fdt = load_device_tree(dtb_filename, &fdt_size); |
| 89 | } |
| 90 | if (!fdt) { |
| 91 | return 0; |
| 92 | } |
| 93 | |
| 94 | if (kernel_cmdline) { |
| 95 | r = qemu_fdt_setprop_string(fdt, "/chosen", "bootargs", |
| 96 | kernel_cmdline); |
| 97 | if (r < 0) { |
| 98 | fprintf(stderr, "couldn't set /chosen/bootargs\n"); |
| 99 | } |
| 100 | } |
| 101 | |
| 102 | if (bi.initrd_start) { |
| 103 | qemu_fdt_setprop_cell(fdt, "/chosen", "linux,initrd-start", |
| 104 | translate_kernel_address(NULL, bi.initrd_start)); |
| 105 | |
| 106 | qemu_fdt_setprop_cell(fdt, "/chosen", "linux,initrd-end", |
| 107 | translate_kernel_address(NULL, bi.initrd_end)); |
| 108 | } |
| 109 | |
| 110 | cpu_physical_memory_write(bi.fdt, fdt, fdt_size); |
| 111 | return fdt_size; |
| 112 | } |
| 113 | |
| 114 | void nios2_load_kernel(Nios2CPU *cpu, hwaddr ddr_base, |
| 115 | uint32_t ramsize, |
| 116 | const char *initrd_filename, |
| 117 | const char *dtb_filename, |
| 118 | void (*machine_cpu_reset)(Nios2CPU *)) |
| 119 | { |
| 120 | QemuOpts *machine_opts; |
| 121 | const char *kernel_filename; |
| 122 | const char *kernel_cmdline; |
| 123 | const char *dtb_arg; |
| 124 | char *filename = NULL; |
| 125 | |
| 126 | machine_opts = qemu_get_machine_opts(); |
| 127 | kernel_filename = qemu_opt_get(machine_opts, "kernel"); |
| 128 | kernel_cmdline = qemu_opt_get(machine_opts, "append"); |
| 129 | dtb_arg = qemu_opt_get(machine_opts, "dtb"); |
| 130 | /* default to pcbios dtb as passed by machine_init */ |
| 131 | if (!dtb_arg) { |
| 132 | filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, dtb_filename); |
| 133 | } |
| 134 | |
| 135 | boot_info.machine_cpu_reset = machine_cpu_reset; |
| 136 | qemu_register_reset(main_cpu_reset, cpu); |
| 137 | |
| 138 | if (kernel_filename) { |
| 139 | int kernel_size, fdt_size; |
| 140 | uint64_t entry, low, high; |
| 141 | uint32_t base32; |
| 142 | int big_endian = 0; |
| 143 | |
| 144 | #ifdef TARGET_WORDS_BIGENDIAN |
| 145 | big_endian = 1; |
| 146 | #endif |
| 147 | |
| 148 | /* Boots a kernel elf binary. */ |
Liam Merwick | 4366e1d | 2019-01-15 12:18:03 +0000 | [diff] [blame] | 149 | kernel_size = load_elf(kernel_filename, NULL, NULL, NULL, |
Marek Vasut | b786256 | 2017-01-18 23:01:45 +0100 | [diff] [blame] | 150 | &entry, &low, &high, |
| 151 | big_endian, EM_ALTERA_NIOS2, 0, 0); |
| 152 | base32 = entry; |
| 153 | if (base32 == 0xc0000000) { |
Liam Merwick | 4366e1d | 2019-01-15 12:18:03 +0000 | [diff] [blame] | 154 | kernel_size = load_elf(kernel_filename, NULL, |
| 155 | translate_kernel_address, NULL, |
| 156 | &entry, NULL, NULL, |
Marek Vasut | b786256 | 2017-01-18 23:01:45 +0100 | [diff] [blame] | 157 | big_endian, EM_ALTERA_NIOS2, 0, 0); |
| 158 | } |
| 159 | |
| 160 | /* Always boot into physical ram. */ |
| 161 | boot_info.bootstrap_pc = ddr_base + 0xc0000000 + (entry & 0x07ffffff); |
| 162 | |
| 163 | /* If it wasn't an ELF image, try an u-boot image. */ |
| 164 | if (kernel_size < 0) { |
Nick Hudson | f831f95 | 2019-01-07 08:31:50 +0000 | [diff] [blame] | 165 | hwaddr uentry, loadaddr = LOAD_UIMAGE_LOADADDR_INVALID; |
Marek Vasut | b786256 | 2017-01-18 23:01:45 +0100 | [diff] [blame] | 166 | |
| 167 | kernel_size = load_uimage(kernel_filename, &uentry, &loadaddr, 0, |
| 168 | NULL, NULL); |
| 169 | boot_info.bootstrap_pc = uentry; |
| 170 | high = loadaddr + kernel_size; |
| 171 | } |
| 172 | |
| 173 | /* Not an ELF image nor an u-boot image, try a RAW image. */ |
| 174 | if (kernel_size < 0) { |
| 175 | kernel_size = load_image_targphys(kernel_filename, ddr_base, |
| 176 | ram_size); |
| 177 | boot_info.bootstrap_pc = ddr_base; |
| 178 | high = ddr_base + kernel_size; |
| 179 | } |
| 180 | |
Philippe Mathieu-Daudé | a3c81ef | 2018-06-25 09:42:17 -0300 | [diff] [blame] | 181 | high = ROUND_UP(high, 1 * MiB); |
Marek Vasut | b786256 | 2017-01-18 23:01:45 +0100 | [diff] [blame] | 182 | |
| 183 | /* If initrd is available, it goes after the kernel, aligned to 1M. */ |
| 184 | if (initrd_filename) { |
| 185 | int initrd_size; |
| 186 | uint32_t initrd_offset; |
| 187 | |
| 188 | boot_info.initrd_start = high; |
| 189 | initrd_offset = boot_info.initrd_start - ddr_base; |
| 190 | |
| 191 | initrd_size = load_ramdisk(initrd_filename, |
| 192 | boot_info.initrd_start, |
| 193 | ram_size - initrd_offset); |
| 194 | if (initrd_size < 0) { |
| 195 | initrd_size = load_image_targphys(initrd_filename, |
| 196 | boot_info.initrd_start, |
| 197 | ram_size - initrd_offset); |
| 198 | } |
| 199 | if (initrd_size < 0) { |
Ishani Chugh | d0e31a1 | 2017-04-13 21:44:39 +0530 | [diff] [blame] | 200 | error_report("could not load initrd '%s'", |
Marek Vasut | b786256 | 2017-01-18 23:01:45 +0100 | [diff] [blame] | 201 | initrd_filename); |
| 202 | exit(EXIT_FAILURE); |
| 203 | } |
| 204 | high += initrd_size; |
| 205 | } |
| 206 | high = ROUND_UP(high, 4); |
| 207 | boot_info.initrd_end = high; |
| 208 | |
| 209 | /* Device tree must be placed right after initrd (if available) */ |
| 210 | boot_info.fdt = high; |
| 211 | fdt_size = nios2_load_dtb(boot_info, ram_size, kernel_cmdline, |
| 212 | /* Preference a -dtb argument */ |
| 213 | dtb_arg ? dtb_arg : filename); |
| 214 | high += fdt_size; |
| 215 | |
| 216 | /* Kernel command is at the end, 4k aligned. */ |
Philippe Mathieu-Daudé | a3c81ef | 2018-06-25 09:42:17 -0300 | [diff] [blame] | 217 | boot_info.cmdline = ROUND_UP(high, 4 * KiB); |
Marek Vasut | b786256 | 2017-01-18 23:01:45 +0100 | [diff] [blame] | 218 | if (kernel_cmdline && strlen(kernel_cmdline)) { |
| 219 | pstrcpy_targphys("cmdline", boot_info.cmdline, 256, kernel_cmdline); |
| 220 | } |
| 221 | } |
| 222 | g_free(filename); |
| 223 | } |