Bootloaders/MassStorage/BootloaderAPITable.S

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2015.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6            www.lufa-lib.org
   7 */
   8
   9 /*
  10   Copyright 2015  Dean Camera (dean [at] fourwalledcubicle [dot] com)
  11
  12   Permission to use, copy, modify, distribute, and sell this
  13   software and its documentation for any purpose is hereby granted
  14   without fee, provided that the above copyright notice appear in
  15   all copies and that both that the copyright notice and this
  16   permission notice and warranty disclaimer appear in supporting
  17   documentation, and that the name of the author not be used in
  18   advertising or publicity pertaining to distribution of the
  19   software without specific, written prior permission.
  20
  21   The author disclaims all warranties with regard to this
  22   software, including all implied warranties of merchantability
  23   and fitness.  In no event shall the author be liable for any
  24   special, indirect or consequential damages or any damages
  25   whatsoever resulting from loss of use, data or profits, whether
  26   in an action of contract, negligence or other tortious action,
  27   arising out of or in connection with the use or performance of
  28   this software.
  29 */
  30
  31 #if AUX_BOOT_SECTION_SIZE > 0
  32 #warning Using a AUX bootloader section in addition to the defined bootloader space (see documentation).
  33
  34 ; Trampoline to jump over the AUX bootloader section to the start of the bootloader,
  35 ; on devices where an AUX bootloader section is used.
  36 .section .boot_aux_trampoline, "ax"
  37 .global Boot_AUX_Trampoline
  38 Boot_AUX_Trampoline:
  39         jmp BOOT_START_ADDR
  40 #endif
  41
  42 ; Trampolines to actual API implementations if the target address is outside the
  43 ; range of a rjmp instruction (can happen with large bootloader sections)
  44 .section .apitable_trampolines, "ax"
  45 .global BootloaderAPI_Trampolines
  46 BootloaderAPI_Trampolines:
  47
  48         BootloaderAPI_ErasePage_Trampoline:
  49                 jmp BootloaderAPI_ErasePage
  50         BootloaderAPI_WritePage_Trampoline:
  51                 jmp BootloaderAPI_WritePage
  52         BootloaderAPI_FillWord_Trampoline:
  53                 jmp BootloaderAPI_FillWord
  54         BootloaderAPI_ReadSignature_Trampoline:
  55                 jmp BootloaderAPI_ReadSignature
  56         BootloaderAPI_ReadFuse_Trampoline:
  57                 jmp BootloaderAPI_ReadFuse
  58         BootloaderAPI_ReadLock_Trampoline:
  59                 jmp BootloaderAPI_ReadLock
  60         BootloaderAPI_WriteLock_Trampoline:
  61                 jmp BootloaderAPI_WriteLock
  62         BootloaderAPI_UNUSED1:
  63                 ret
  64         BootloaderAPI_UNUSED2:
  65                 ret
  66         BootloaderAPI_UNUSED3:
  67                 ret
  68         BootloaderAPI_UNUSED4:
  69                 ret
  70         BootloaderAPI_UNUSED5:
  71                 ret
  72
  73
  74
  75 ; API function jump table
  76 .section .apitable_jumptable, "ax"
  77 .global BootloaderAPI_JumpTable
  78 BootloaderAPI_JumpTable:
  79
  80         rjmp BootloaderAPI_ErasePage_Trampoline
  81         rjmp BootloaderAPI_WritePage_Trampoline
  82         rjmp BootloaderAPI_FillWord_Trampoline
  83         rjmp BootloaderAPI_ReadSignature_Trampoline
  84         rjmp BootloaderAPI_ReadFuse_Trampoline
  85         rjmp BootloaderAPI_ReadLock_Trampoline
  86         rjmp BootloaderAPI_WriteLock_Trampoline
  87         rjmp BootloaderAPI_UNUSED1 ; UNUSED ENTRY 1
  88         rjmp BootloaderAPI_UNUSED2 ; UNUSED ENTRY 2
  89         rjmp BootloaderAPI_UNUSED3 ; UNUSED ENTRY 3
  90         rjmp BootloaderAPI_UNUSED4 ; UNUSED ENTRY 4
  91         rjmp BootloaderAPI_UNUSED5 ; UNUSED ENTRY 5
  92
  93
  94
  95 ; Bootloader table signatures and information
  96 .section .apitable_signatures, "ax"
  97 .global BootloaderAPI_Signatures
  98 BootloaderAPI_Signatures:
  99
 100         .long BOOT_START_ADDR ; Start address of the bootloader
 101         .word 0xDF30 ; Signature for the MS class bootloader, V1
 102         .word 0xDCFB ; Signature for a LUFA class bootloader