| 1 | /* |
| 2 | * SPDX-License-Identifier: GPL-2.0-or-later |
| 3 | * |
| 4 | * QEMU OpenRISC boot helpers. |
| 5 | * |
| 6 | * (c) 2022 Stafford Horne <shorne@gmail.com> |
| 7 | */ |
| 8 | |
| 9 | #include "qemu/osdep.h" |
| 10 | #include "target/or1k/cpu.h" |
| 11 | #include "exec/cpu-defs.h" |
| 12 | #include "exec/target_page.h" |
| 13 | #include "elf.h" |
| 14 | #include "hw/core/loader.h" |
| 15 | #include "hw/or1k/boot.h" |
| 16 | #include "system/device_tree.h" |
| 17 | #include "system/qtest.h" |
| 18 | #include "system/reset.h" |
| 19 | #include "qemu/error-report.h" |
| 20 | |
| 21 | #include <libfdt.h> |
| 22 | |
| 23 | #define KERNEL_LOAD_ADDR 0x100 |
| 24 | |
| 25 | hwaddr openrisc_load_kernel(ram_addr_t ram_size, |
| 26 | const char *kernel_filename, |
| 27 | uint32_t *bootstrap_pc) |
| 28 | { |
| 29 | long kernel_size; |
| 30 | uint64_t elf_entry; |
| 31 | uint64_t high_addr; |
| 32 | hwaddr entry; |
| 33 | |
| 34 | if (kernel_filename && !qtest_enabled()) { |
| 35 | kernel_size = load_elf(kernel_filename, NULL, NULL, NULL, |
| 36 | &elf_entry, NULL, &high_addr, NULL, ELFDATA2MSB, |
| 37 | EM_OPENRISC, 1, 0); |
| 38 | entry = elf_entry; |
| 39 | if (kernel_size < 0) { |
| 40 | kernel_size = load_uimage(kernel_filename, |
| 41 | &entry, NULL, NULL, NULL, NULL); |
| 42 | high_addr = entry + kernel_size; |
| 43 | } |
| 44 | if (kernel_size < 0) { |
| 45 | kernel_size = load_image_targphys(kernel_filename, |
| 46 | KERNEL_LOAD_ADDR, |
| 47 | ram_size - KERNEL_LOAD_ADDR, |
| 48 | NULL); |
| 49 | high_addr = KERNEL_LOAD_ADDR + kernel_size; |
| 50 | } |
| 51 | |
| 52 | if (entry <= 0) { |
| 53 | entry = KERNEL_LOAD_ADDR; |
| 54 | } |
| 55 | |
| 56 | if (kernel_size < 0) { |
| 57 | error_report("couldn't load the kernel '%s'", kernel_filename); |
| 58 | exit(1); |
| 59 | } |
| 60 | *bootstrap_pc = entry; |
| 61 | |
| 62 | return high_addr; |
| 63 | } |
| 64 | return 0; |
| 65 | } |
| 66 | |
| 67 | hwaddr openrisc_load_initrd(void *fdt, const char *filename, |
| 68 | hwaddr load_start, uint64_t mem_size) |
| 69 | { |
| 70 | int size; |
| 71 | hwaddr start; |
| 72 | |
| 73 | /* We put the initrd right after the kernel; page aligned. */ |
| 74 | start = TARGET_PAGE_ALIGN(load_start); |
| 75 | |
| 76 | size = load_ramdisk(filename, start, mem_size - start); |
| 77 | if (size < 0) { |
| 78 | size = load_image_targphys(filename, start, mem_size - start, NULL); |
| 79 | if (size < 0) { |
| 80 | error_report("could not load ramdisk '%s'", filename); |
| 81 | exit(1); |
| 82 | } |
| 83 | } |
| 84 | |
| 85 | if (fdt) { |
| 86 | qemu_fdt_setprop_cell(fdt, "/chosen", |
| 87 | "linux,initrd-start", start); |
| 88 | qemu_fdt_setprop_cell(fdt, "/chosen", |
| 89 | "linux,initrd-end", start + size); |
| 90 | } |
| 91 | |
| 92 | return start + size; |
| 93 | } |
| 94 | |
| 95 | uint32_t openrisc_load_fdt(MachineState *ms, void *fdt, |
| 96 | hwaddr load_start, uint64_t mem_size) |
| 97 | { |
| 98 | uint32_t fdt_addr; |
| 99 | int ret; |
| 100 | int fdtsize = fdt_totalsize(fdt); |
| 101 | |
| 102 | if (fdtsize <= 0) { |
| 103 | error_report("invalid device-tree"); |
| 104 | exit(1); |
| 105 | } |
| 106 | |
| 107 | /* We put fdt right after the kernel and/or initrd. */ |
| 108 | fdt_addr = TARGET_PAGE_ALIGN(load_start); |
| 109 | |
| 110 | ret = fdt_pack(fdt); |
| 111 | /* Should only fail if we've built a corrupted tree */ |
| 112 | g_assert(ret == 0); |
| 113 | /* copy in the device tree */ |
| 114 | |
| 115 | /* Save FDT for dumpdtb monitor command */ |
| 116 | ms->fdt = fdt; |
| 117 | |
| 118 | rom_add_blob_fixed_as("fdt", fdt, fdtsize, fdt_addr, |
| 119 | &address_space_memory); |
| 120 | qemu_register_reset_nosnapshotload(qemu_fdt_randomize_seeds, |
| 121 | rom_ptr_for_as(&address_space_memory, fdt_addr, fdtsize)); |
| 122 | |
| 123 | return fdt_addr; |
| 124 | } |