diff options
Diffstat (limited to 'c/src/lib/libbsp/arm/nds/coproc/coproc.S')
-rw-r--r-- | c/src/lib/libbsp/arm/nds/coproc/coproc.S | 112 |
1 files changed, 0 insertions, 112 deletions
diff --git a/c/src/lib/libbsp/arm/nds/coproc/coproc.S b/c/src/lib/libbsp/arm/nds/coproc/coproc.S deleted file mode 100644 index f1bc2bac61..0000000000 --- a/c/src/lib/libbsp/arm/nds/coproc/coproc.S +++ /dev/null @@ -1,112 +0,0 @@ -@--------------------------------------------------------------------------------- - .section ".init" - .global _start - .global _init -@--------------------------------------------------------------------------------- - .align 4 - .arm -@--------------------------------------------------------------------------------- -_start: -@--------------------------------------------------------------------------------- - mov r0, #0x04000000 @ IME = 0; - str r0, [r0, #0x208] - - mov r0, #0x12 @ Switch to IRQ Mode - msr cpsr, r0 - ldr sp, =__sp_irq @ Set IRQ stack - - mov r0, #0x13 @ Switch to SVC Mode - msr cpsr, r0 - ldr sp, =__sp_svc @ Set SVC stack - - mov r0, #0x1F @ Switch to System Mode - msr cpsr, r0 - ldr sp, =__sp_usr @ Set user stack - - ldr r0, =__bss_start @ Clear BSS section to 0x00 - ldr r1, =__bss_end - sub r1, r1, r0 - bl ClearMem - - ldr r3, =__libc_init_array @ global constructors - bl _call_via_r3 - - mov r0, #0 @ int argc - mov r1, #0 @ char *argv[] - ldr r3, =main - bl _call_via_r3 @ jump to user code - - @ If the user ever returns, return to flash cartridge - mov r0, #0x08000000 - bx r0 - -@--------------------------------------------------------------------------------- -@ Clear memory to 0x00 if length != 0 -@ r0 = Start Address -@ r1 = Length -@--------------------------------------------------------------------------------- -ClearMem: -@--------------------------------------------------------------------------------- - mov r2, #3 @ Round down to nearest word boundary - add r1, r1, r2 @ Shouldn't be needed - bics r1, r1, r2 @ Clear 2 LSB (and set Z) - bxeq lr @ Quit if copy size is 0 - - mov r2, #0 -ClrLoop: - stmia r0!, {r2} - subs r1, r1, #4 - bne ClrLoop - bx lr - -@--------------------------------------------------------------------------------- -@ Copy memory if length != 0 -@ r1 = Source Address -@ r2 = Dest Address -@ r4 = Dest Address + Length -@--------------------------------------------------------------------------------- -CopyMemCheck: -@--------------------------------------------------------------------------------- - sub r3, r4, r2 @ Is there any data to copy? -@--------------------------------------------------------------------------------- -@ Copy memory -@ r1 = Source Address -@ r2 = Dest Address -@ r3 = Length -@--------------------------------------------------------------------------------- -CopyMem: -@--------------------------------------------------------------------------------- - mov r0, #3 @ These commands are used in cases where - add r3, r3, r0 @ the length is not a multiple of 4, - bics r3, r3, r0 @ even though it should be. - bxeq lr @ Length is zero, so exit -CIDLoop: - ldmia r1!, {r0} - stmia r2!, {r0} - subs r3, r3, #4 - bne CIDLoop - bx lr - -_init: - bx lr - -@--------------------------------------------------------------------------------- - .align -@ .pool -@ .end -@--------------------------------------------------------------------------------- - -@--------------------------------------------------------------------------------- - .section ".fini" - .global _fini -@--------------------------------------------------------------------------------- - .align 4 - .arm -@--------------------------------------------------------------------------------- -_fini: - bx lr -@--------------------------------------------------------------------------------- - .align - .pool - .end -@--------------------------------------------------------------------------------- |