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