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 "exec/target_page.h" 13 #include "elf.h" 14 #include "hw/loader.h" 15 #include "hw/openrisc/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 high_addr = KERNEL_LOAD_ADDR + kernel_size; 49 } 50 51 if (entry <= 0) { 52 entry = KERNEL_LOAD_ADDR; 53 } 54 55 if (kernel_size < 0) { 56 error_report("couldn't load the kernel '%s'", kernel_filename); 57 exit(1); 58 } 59 *bootstrap_pc = entry; 60 61 return high_addr; 62 } 63 return 0; 64 } 65 66 hwaddr openrisc_load_initrd(void *fdt, const char *filename, 67 hwaddr load_start, uint64_t mem_size) 68 { 69 int size; 70 hwaddr start; 71 72 /* We put the initrd right after the kernel; page aligned. */ 73 start = TARGET_PAGE_ALIGN(load_start); 74 75 size = load_ramdisk(filename, start, mem_size - start); 76 if (size < 0) { 77 size = load_image_targphys(filename, start, mem_size - start); 78 if (size < 0) { 79 error_report("could not load ramdisk '%s'", filename); 80 exit(1); 81 } 82 } 83 84 if (fdt) { 85 qemu_fdt_setprop_cell(fdt, "/chosen", 86 "linux,initrd-start", start); 87 qemu_fdt_setprop_cell(fdt, "/chosen", 88 "linux,initrd-end", start + size); 89 } 90 91 return start + size; 92 } 93 94 uint32_t openrisc_load_fdt(MachineState *ms, void *fdt, 95 hwaddr load_start, uint64_t mem_size) 96 { 97 uint32_t fdt_addr; 98 int ret; 99 int fdtsize = fdt_totalsize(fdt); 100 101 if (fdtsize <= 0) { 102 error_report("invalid device-tree"); 103 exit(1); 104 } 105 106 /* We put fdt right after the kernel and/or initrd. */ 107 fdt_addr = TARGET_PAGE_ALIGN(load_start); 108 109 ret = fdt_pack(fdt); 110 /* Should only fail if we've built a corrupted tree */ 111 g_assert(ret == 0); 112 /* copy in the device tree */ 113 114 /* Save FDT for dumpdtb monitor command */ 115 ms->fdt = fdt; 116 117 rom_add_blob_fixed_as("fdt", fdt, fdtsize, fdt_addr, 118 &address_space_memory); 119 qemu_register_reset_nosnapshotload(qemu_fdt_randomize_seeds, 120 rom_ptr_for_as(&address_space_memory, fdt_addr, fdtsize)); 121 122 return fdt_addr; 123 } 124