Initial commit

source/dldi_header.s

@@ -0,0 +1,61 @@
+// SPDX-License-Identifier: Zlib
+//
+// Copyright (C) 2006-2016 Michael Chisholm (Chishm)
+// Copyright (C) 2006-2016 Dave Murphy (WinterMute)
+
+#include <nds/arm9/dldi_asm.h>
+
+    .syntax unified
+    .section ".crt0","ax"
+    .global _start
+    .align    4
+    .arm
+
+@ Driver patch file standard header -- 16 bytes
+
+    .word   0xBF8DA5ED                  @ DLDI identifier - magic number
+    .asciz  " Chishm"                   @ DLDI identifier - magic string (8 bytes with null terminator)
+    .byte   0x01                        @ DLDI identifier - DLDI version number
+    .byte   __dldi_header_driver_size   @ Log [base-2] of the size of this driver in bytes.
+                                        @ Calculated automatically in the link script.
+    .byte   __dldi_header_fix_flags     @ Sections to fix.
+                                        @ Calculated automatically in the link script.
+    .byte   0x00                        @ Space allocated in the .nds file; leave empty.
+
+@ Text identifier - can be anything up to 47 chars + terminating null -- 48 bytes
+
+    .align  4
+    .asciz  "DSpico DLDI"
+
+@ Offsets to important sections within the data -- 32 bytes
+
+    .align  6
+    .word   __text_start    @ data start
+    .word   __data_end      @ data end
+    .word   __glue_start    @ Interworking glue start -- Needs address fixing
+    .word   __glue_end      @ Interworking glue end
+    .word   __got_start     @ GOT start               -- Needs address fixing
+    .word   __got_end       @ GOT end
+    .word   __bss_start     @ bss start               -- Needs setting to zero
+    .word   __bss_end       @ bss end
+
+@ IO_INTERFACE data -- 32 bytes
+
+    .ascii  "PICO"          @ ioType (Normally "DLDI")
+#ifdef ARM9
+    .word   FEATURE_MEDIUM_CANREAD | FEATURE_MEDIUM_CANWRITE | FEATURE_SLOT_NDS
+#else
+    .word   FEATURE_MEDIUM_CANREAD | FEATURE_MEDIUM_CANWRITE | FEATURE_SLOT_NDS | FEATURE_ARM7_CAPABLE
+#endif
+    .word   dldi_startup         @ Function pointers to standard device driver functions
+    .word   dldi_isInserted
+    .word   dldi_readSectors
+    .word   dldi_writeSectors
+    .word   dldi_clearStatus
+    .word   dldi_shutdown
+
+_start:
+
+    .align
+    .pool
+    .end