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 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 } 125