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; ARC start up file

; In the absence of a custom linker script, go with something simple.

; We do not support passing arguments to "main", but this is an embedded

; system anyway.

;

; We call init/fini here without cpu prefixes because there is always

; only one .init/.fini section per image.

        .section .text

        .align 4

        .global start

start:

        mov     sp,end          ; Round "sp" up to page after "end".

        add     sp,sp,4095

        and     sp,sp,-4096

        ld      r8,[stack_size] ; Add stack size to "sp".

        add     sp,sp,r8

        st      sp,[sbrk_start] ; Initialize malloc heap.

        st      sp,[sbrk_loc]

        sub     sp,sp,16        ; callee expects 16 bytes already "pushed".

        mov     fp,0            ; Top of stack frame indicator.

        mov     r0,edata        ; Zero bss.

        mov     r2,end

        sub     r2,r2,r0

        mov     r1,0

#ifdef __base__

        bl.nd   _memset

        bl.nd   init            ; .init section entry point.

        mov     r0,%st(fini)    ; .fini section entry point.

        bl.nd   _atexit

        mov     r0,0            ; argc

        mov     r1,0            ; argv

        bl.nd   _main

        bl.nd   _exit

#endif

#ifdef __host__

        bl.nd   _host_memset

        bl.nd   init            ; .init section entry point.

        mov     r0,%st(fini)    ; .fini section entry point.

        bl.nd   _host_atexit

        mov     r0,0            ; argc

        mov     r1,0            ; argv

        bl.nd   _host_main

        bl.nd   _host_exit

#endif

#ifdef __graphics__

        bl.nd   _graphics_memset

        bl.nd   init            ; .init section entry point.

        mov     r0,%st(fini)    ; .fini section entry point.

        bl.nd   _graphics_atexit

        mov     r0,0            ; argc

        mov     r1,0            ; argv

        bl.nd   _graphics_main

        bl.nd   _graphics_exit

#endif

#ifdef __audio__

        bl.nd   _audio_memset

        bl.nd   init            ; .init section entry point.

        mov     r0,%st(fini)    ; .fini section entry point.

        bl.nd   _audio_atexit

        mov     r0,0            ; argc

        mov     r1,0            ; argv

        bl.nd   _audio_main

        bl.nd   _audio_exit

#endif