Skip to content

Commit

Permalink
booter_fc: Re-add 32KB DLDI support
Browse files Browse the repository at this point in the history
  • Loading branch information
RocketRobz committed Feb 3, 2025
1 parent ca9eafd commit 818f262
Show file tree
Hide file tree
Showing 3 changed files with 102 additions and 2 deletions.
100 changes: 100 additions & 0 deletions booter_fc/arm9/source/my_dldi.s
Original file line number Diff line number Diff line change
@@ -0,0 +1,100 @@
/*---------------------------------------------------------------------------------
Copyright (C) 2006 - 2016
Michael Chisholm (Chishm)
Dave Murphy (WinterMute)
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any
damages arising from the use of this software.
Permission is granted to anyone to use this software for any
purpose, including commercial applications, and to alter it and
redistribute it freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you
must not claim that you wrote the original software. If you use
this software in a product, an acknowledgment in the product
documentation would be appreciated but is not required.
2. Altered source versions must be plainly marked as such, and
must not be misrepresented as being the original software.
3. This notice may not be removed or altered from any source
distribution.
---------------------------------------------------------------------------------*/

#include <nds/arm9/dldi_asm.h>

.align 4
.arm
.global _io_dldi_stub
@---------------------------------------------------------------------------------

.equ DLDI_ALLOCATED_SPACE, 32768

_io_dldi_stub:

dldi_start:

@---------------------------------------------------------------------------------
@ Driver patch file standard header -- 16 bytes
.word 0xBF8DA5ED @ Magic number to identify this region
.asciz " Chishm" @ Identifying Magic string (8 bytes with null terminator)
.byte 0x01 @ Version number
.byte DLDI_SIZE_32KB @32KiB @ Log [base-2] of the size of this driver in bytes.
.byte 0x00 @ Sections to fix
.byte DLDI_SIZE_32KB @32KiB @ Log [base-2] of the allocated space in bytes.

@---------------------------------------------------------------------------------
@ Text identifier - can be anything up to 47 chars + terminating null -- 16 bytes
.align 4
.asciz "Default (No interface)"

@---------------------------------------------------------------------------------
@ Offsets to important sections within the data -- 32 bytes
.align 6
.word dldi_start @ data start
.word dldi_end @ data end
.word 0x00000000 @ Interworking glue start -- Needs address fixing
.word 0x00000000 @ Interworking glue end
.word 0x00000000 @ GOT start -- Needs address fixing
.word 0x00000000 @ GOT end
.word 0x00000000 @ bss start -- Needs setting to zero
.word 0x00000000 @ bss end

@---------------------------------------------------------------------------------
@ DISC_INTERFACE data -- 32 bytes
.ascii "DLDI" @ ioType
.word 0x00000000 @ Features
.word _DLDI_startup @
.word _DLDI_isInserted @
.word _DLDI_readSectors @ Function pointers to standard device driver functions
.word _DLDI_writeSectors @
.word _DLDI_clearStatus @
.word _DLDI_shutdown @

@---------------------------------------------------------------------------------

_DLDI_startup:
_DLDI_isInserted:
_DLDI_readSectors:
_DLDI_writeSectors:
_DLDI_clearStatus:
_DLDI_shutdown:
mov r0, #0x00 @ Return false for every function
bx lr



@---------------------------------------------------------------------------------
.align
.pool

dldi_data_end:

@ Pad to end of allocated space
.space DLDI_ALLOCATED_SPACE - (dldi_data_end - dldi_start)

dldi_end:
.end
@---------------------------------------------------------------------------------
2 changes: 1 addition & 1 deletion booter_fc/flashcart_specifics/address_adapt/arm9/Makefile
Original file line number Diff line number Diff line change
Expand Up @@ -38,7 +38,7 @@ CFLAGS := -g -Wall -O2 \
CFLAGS += $(INCLUDE) -DARM9
CXXFLAGS := $(CFLAGS) -fno-rtti -fno-exceptions

ASFLAGS := -g $(ARCH) -flto
ASFLAGS := -g $(ARCH) $(INCLUDE) -flto
LDFLAGS = -specs=ds_arm9.specs -g $(ARCH) -Wl,-Map,$(notdir $*.map)

#---------------------------------------------------------------------------------
Expand Down
2 changes: 1 addition & 1 deletion booter_fc/flashcart_specifics/r4ig/arm9/Makefile
Original file line number Diff line number Diff line change
Expand Up @@ -36,7 +36,7 @@ CFLAGS := -g -Wall -O2 \
CFLAGS += $(INCLUDE) -DARM9
CXXFLAGS := $(CFLAGS) -fno-rtti -fno-exceptions

ASFLAGS := -g $(ARCH) -flto
ASFLAGS := -g $(ARCH) $(INCLUDE) -flto
LDFLAGS = -specs=../ds_arm9_r4ig.specs -g $(ARCH) -Wl,-Map,$(notdir $*.map)

#---------------------------------------------------------------------------------
Expand Down

0 comments on commit 818f262

Please sign in to comment.