Minor documentation improvements.

[pub/USBasp.git] / Bootloaders / CDC / BootloaderAPITable.S

diff --git a/Bootloaders/CDC/BootloaderAPITable.S b/Bootloaders/CDC/BootloaderAPITable.S
index 1ad8e28..fc1e2e9 100644 (file)
--- a/Bootloaders/CDC/BootloaderAPITable.S
+++ b/Bootloaders/CDC/BootloaderAPITable.S
@@ -30,23 +30,48 @@
 
 ; Bootloader API Jump Table
 .section .apitable, "ax"
+
+; Trampolines to actual API implementations if the target address is outside the
+; range of a rjmp instruction (can happen with large bootloader sections)
 .org 0
+BootloaderAPI_ErasePage_Trampoline:
+       jmp BootloaderAPI_ErasePage
+BootloaderAPI_WritePage_Trampoline:
+       jmp BootloaderAPI_WritePage
+BootloaderAPI_FillWord_Trampoline:
+       jmp BootloaderAPI_FillWord
+BootloaderAPI_ReadSignature_Trampoline:
+       jmp BootloaderAPI_ReadSignature
+BootloaderAPI_ReadFuse_Trampoline:
+       jmp BootloaderAPI_ReadFuse
+BootloaderAPI_ReadLock_Trampoline:
+       jmp BootloaderAPI_ReadLock
+BootloaderAPI_WriteLock_Trampoline:
+       jmp BootloaderAPI_WriteLock
+BootloaderAPU_UNUSED:
+       ret
 
 ; API function jump table
+.org (96 - 32)
 .global BootloaderAPI_JumpTable
 BootloaderAPI_JumpTable:
-       rjmp BootloaderAPI_ErasePage
-       rjmp BootloaderAPI_WritePage
-       rjmp BootloaderAPI_FillWord
-       rjmp BootloaderAPI_ReadSignature
-       rjmp BootloaderAPI_ReadFuse
-       rjmp BootloaderAPI_ReadLock
-       rjmp BootloaderAPI_WriteLock
+       rjmp BootloaderAPI_ErasePage_Trampoline
+       rjmp BootloaderAPI_WritePage_Trampoline
+       rjmp BootloaderAPI_FillWord_Trampoline
+       rjmp BootloaderAPI_ReadSignature_Trampoline
+       rjmp BootloaderAPI_ReadFuse_Trampoline
+       rjmp BootloaderAPI_ReadLock_Trampoline
+       rjmp BootloaderAPI_WriteLock_Trampoline
+       rjmp BootloaderAPU_UNUSED ; UNUSED ENTRY
+       rjmp BootloaderAPU_UNUSED ; UNUSED ENTRY
+       rjmp BootloaderAPU_UNUSED ; UNUSED ENTRY
+       rjmp BootloaderAPU_UNUSED ; UNUSED ENTRY
+       rjmp BootloaderAPU_UNUSED ; UNUSED ENTRY
 
 ; Bootloader table signatures and information
-.org 24
+.org (96 - 8)
+BootloaderAPI_Signatures:
+.global BootloaderAPI_Signatures
        .long BOOT_START_ADDR ; Start address of the bootloader
-.org 28
        .word 0xCDC1 ; Signature for the CDC class bootloader, V1
-.org 30
        .word 0xDCFB ; Signature for a LUFA class bootloader