1 /* 2 * AVR loader helpers 3 * 4 * Copyright (c) 2019-2020 Philippe Mathieu-Daudé 5 * 6 * This work is licensed under the terms of the GNU GPLv2 or later. 7 * See the COPYING file in the top-level directory. 8 * SPDX-License-Identifier: GPL-2.0-or-later 9 */ 10 11 #include "qemu/osdep.h" 12 #include "qemu-common.h" 13 #include "qemu/datadir.h" 14 #include "hw/loader.h" 15 #include "elf.h" 16 #include "boot.h" 17 #include "qemu/error-report.h" 18 19 static const char *avr_elf_e_flags_to_cpu_type(uint32_t flags) 20 { 21 switch (flags & EF_AVR_MACH) { 22 case bfd_mach_avr1: 23 return AVR_CPU_TYPE_NAME("avr1"); 24 case bfd_mach_avr2: 25 return AVR_CPU_TYPE_NAME("avr2"); 26 case bfd_mach_avr25: 27 return AVR_CPU_TYPE_NAME("avr25"); 28 case bfd_mach_avr3: 29 return AVR_CPU_TYPE_NAME("avr3"); 30 case bfd_mach_avr31: 31 return AVR_CPU_TYPE_NAME("avr31"); 32 case bfd_mach_avr35: 33 return AVR_CPU_TYPE_NAME("avr35"); 34 case bfd_mach_avr4: 35 return AVR_CPU_TYPE_NAME("avr4"); 36 case bfd_mach_avr5: 37 return AVR_CPU_TYPE_NAME("avr5"); 38 case bfd_mach_avr51: 39 return AVR_CPU_TYPE_NAME("avr51"); 40 case bfd_mach_avr6: 41 return AVR_CPU_TYPE_NAME("avr6"); 42 case bfd_mach_avrtiny: 43 return AVR_CPU_TYPE_NAME("avrtiny"); 44 case bfd_mach_avrxmega2: 45 return AVR_CPU_TYPE_NAME("xmega2"); 46 case bfd_mach_avrxmega3: 47 return AVR_CPU_TYPE_NAME("xmega3"); 48 case bfd_mach_avrxmega4: 49 return AVR_CPU_TYPE_NAME("xmega4"); 50 case bfd_mach_avrxmega5: 51 return AVR_CPU_TYPE_NAME("xmega5"); 52 case bfd_mach_avrxmega6: 53 return AVR_CPU_TYPE_NAME("xmega6"); 54 case bfd_mach_avrxmega7: 55 return AVR_CPU_TYPE_NAME("xmega7"); 56 default: 57 return NULL; 58 } 59 } 60 61 bool avr_load_firmware(AVRCPU *cpu, MachineState *ms, 62 MemoryRegion *program_mr, const char *firmware) 63 { 64 g_autofree char *filename = NULL; 65 int bytes_loaded; 66 uint64_t entry; 67 uint32_t e_flags; 68 69 filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, firmware); 70 if (filename == NULL) { 71 error_report("Unable to find %s", firmware); 72 return false; 73 } 74 75 bytes_loaded = load_elf_ram_sym(filename, 76 NULL, NULL, NULL, 77 &entry, NULL, NULL, 78 &e_flags, 0, EM_AVR, 0, 0, 79 NULL, true, NULL); 80 if (bytes_loaded >= 0) { 81 /* If ELF file is provided, determine CPU type reading ELF e_flags. */ 82 const char *elf_cpu = avr_elf_e_flags_to_cpu_type(e_flags); 83 const char *mcu_cpu_type = object_get_typename(OBJECT(cpu)); 84 int cpu_len = strlen(mcu_cpu_type) - strlen(AVR_CPU_TYPE_SUFFIX); 85 86 if (entry) { 87 error_report("BIOS entry_point must be 0x0000 " 88 "(ELF image '%s' has entry_point 0x%04" PRIx64 ")", 89 firmware, entry); 90 return false; 91 } 92 if (!elf_cpu) { 93 warn_report("Could not determine CPU type for ELF image '%s', " 94 "assuming '%.*s' CPU", 95 firmware, cpu_len, mcu_cpu_type); 96 return true; 97 } 98 if (strcmp(elf_cpu, mcu_cpu_type)) { 99 error_report("Current machine: %s with '%.*s' CPU", 100 MACHINE_GET_CLASS(ms)->desc, cpu_len, mcu_cpu_type); 101 error_report("ELF image '%s' is for '%.*s' CPU", 102 firmware, 103 (int)(strlen(elf_cpu) - strlen(AVR_CPU_TYPE_SUFFIX)), 104 elf_cpu); 105 return false; 106 } 107 } else { 108 bytes_loaded = load_image_mr(filename, program_mr); 109 } 110 if (bytes_loaded < 0) { 111 error_report("Unable to load firmware image %s as ELF or raw binary", 112 firmware); 113 return false; 114 } 115 return true; 116 } 117