diff options
Diffstat (limited to 'c/src/lib/start')
| -rw-r--r-- | c/src/lib/start/README | 10 | ||||
| -rw-r--r-- | c/src/lib/start/i960/start.s | 105 | ||||
| -rw-r--r-- | c/src/lib/start/m68k/start.s | 160 |
3 files changed, 0 insertions, 275 deletions
diff --git a/c/src/lib/start/README b/c/src/lib/start/README deleted file mode 100644 index bec0349374..0000000000 --- a/c/src/lib/start/README +++ /dev/null @@ -1,10 +0,0 @@ -$Id$ - -For each processor there may be some start up code -(like crt.o) in the appropriate entry subdirectory. This -entry code transfers control to target board specific -code). - -For some processors this code exists in some external (to RTEMS) -library such as libgloss or the host system (for example the hppa1_1 -and UNIX cpu's) diff --git a/c/src/lib/start/i960/start.s b/c/src/lib/start/i960/start.s deleted file mode 100644 index 8db45011b1..0000000000 --- a/c/src/lib/start/i960/start.s +++ /dev/null @@ -1,105 +0,0 @@ -/* entry.s - * - * This file contains the entry point for the application. - * The name of this entry point is compiler dependent. - * It jumps to the BSP which is responsible for performing - * all initialization. - * - * COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994. - * On-Line Applications Research Corporation (OAR). - * All rights assigned to U.S. Government, 1994. - * - * This material may be reproduced by or for the U.S. Government pursuant - * to the copyright license under the clause at DFARS 252.227-7013. This - * notice must appear in all copies of this file and its derivatives. - * - * $Id$ - */ - -#include "asm.h" - - BEGIN_CODE - PUBLIC(start) # GNU960 default entry point - -start: - mov 3, r12 - modpc r12, r12, r12 # enable tracing/trace faults - mov g5, g5 # NOP - mov 0, g14 # initialize constant for C - - /* - * zero out uninitialized data area - */ -zerobss: - lda _end, r4 /* find end of .bss */ - lda _bss_start, r5 /* find beginning of .bss */ - ldconst 0, r6 - -loop: st r6, (r5) /* to zero out uninitialized */ - addo 4, r5, r5 /* data area */ - cmpobl r5, r4, loop /* loop until _end reached */ - -/* set up stack pointer: - * The heap will begin at '_end'; its length is 'heap_size' - * bytes. The stack will begin at the first 64-byte-aligned - * block after the heap. - * - * A default value of 'heap_size' is set by linking with libnindy.a - * The default can be overridden by redefining this symbol at link - * time (with a line of the form 'heap_size=XXXX;' in the lnk960 - * linker specification file; or one of the form - * "-defsym heap_size=XXXX" on the gld960 invocation line). - */ - - ldconst _end, sp /* set sp = address of end of heap */ - lda heap_size(sp),sp - lda 64(sp), sp /* Now round up to 64-byte boundary */ - ldconst 0xffffffc0, r12 - and r12, sp, sp - st sp, _stack_start /* Save for brk() routine */ - - call init_frames - ret /* return to monitor */ - -init_frames: - mov 0, g14 /* initialize constant for C */ - ldconst 0x3b001000, g0 - ldconst 0x00009107, g1 - modac g1, g0, g0 /* set AC controls */ - - /* - * remember the frame, so that we can set it up if necessary - */ - - st fp, _start_frame - - /* - * Call application mainline. - * Someday, real values of argc and argv will be set up. - * For now, they are set to 0. - */ - ldconst 0,g0 - ldconst 0,g1 - call _bsp_start - ret - -END_CODE - - BEGIN_DATA - - PUBLIC(_start_frame) -SYM (_start_frame): - .word 0 # addr of first user frame: for gdb960 - -SYM (_stack_start): - PUBLIC(_stack_start) - .word 0 # addr of first user frame: for gdb960 - -END_DATA - -BEGIN_BSS - PUBLIC(heap_size) - .set heap_size,0x2000 -END_BSS - -END diff --git a/c/src/lib/start/m68k/start.s b/c/src/lib/start/m68k/start.s deleted file mode 100644 index 0bbb0a851f..0000000000 --- a/c/src/lib/start/m68k/start.s +++ /dev/null @@ -1,160 +0,0 @@ -/* entry.s - * - * This file contains the entry point for the application. - * The name of this entry point is compiler dependent. - * It jumps to the BSP which is responsible for performing - * all initialization. - * - * COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994. - * On-Line Applications Research Corporation (OAR). - * All rights assigned to U.S. Government, 1994. - * - * This material may be reproduced by or for the U.S. Government pursuant - * to the copyright license under the clause at DFARS 252.227-7013. This - * notice must appear in all copies of this file and its derivatives. - * - * $Id$ - */ - -#include "asm.h" - -BEGIN_CODE - | Default entry points for: - PUBLIC (start) | GNU - PUBLIC (M68Kvec) | Vector Table - -SYM (start): -SYM (M68Kvec): | standard location for vectors - nop | for linkers with problem - | location zero - jmp SYM (start_around) - - /* - * We can use the following space as our vector table - * if the CPU has a VBR or we can save vector table in it - * if the CPU does not. - */ - - .space 4088 | to avoid initial intr stack - | from 135BUG on MVME13? - | and start code at 0x4000 -SYM (vectors): - .space 1016 | reserve space for rest of vectors - -#if ( M68K_HAS_SEPARATE_STACKS == 1 ) -SYM (lowintstack): - .space 4092 | reserve for interrupt stack -SYM (hiintstack): - .space 4 | end of interrupt stack -#endif - - PUBLIC (start_around) -SYM (start_around): - move.w sr, SYM (initial_sr) -#if ( M68K_HAS_SEPARATE_STACKS == 1 ) - movec isp,a0 - move.l a0, SYM (initial_isp) - movec usp,a0 - move.l a0, SYM (initial_usp) - movec msp,a0 - move.l a0, SYM (initial_msp) -#else - move.l a7, SYM (initial_msp) -#endif - oriw #0x0700,sr | INTERRUPTS OFF!!! - - - - | - | zero out uninitialized data area - | -zerobss: - moveal # SYM (end),a0 | find end of .bss - moveal # SYM (bss_start),a1 | find beginning of .bss - movel #0,d0 - -loop: movel #0,a1@+ | to zero out uninitialized - cmpal a0,a1 - jlt loop | loop until _end reached - - movel # SYM (end),d0 | d0 = end of bss/start of heap - addl # SYM (heap_size),d0 | d0 = end of heap - movel d0, SYM (stack_start) | Save for brk() routine - addl # SYM (stack_size),d0 | make room for stack - andl #0xffffffc0,d0 | align it on 16 byte boundary - movw #0x3700,sr | SUPV MODE,INTERRUPTS OFF!!! - movel d0,a7 | set master stack pointer - movel d0,a6 | set base pointer - - /* - * RTEMS should maintiain a separate interrupt stack on CPUs - * without one in hardware. This is currently not supported - * on versions of the m68k without a HW intr stack. - */ - -#if ( M68K_HAS_SEPARATE_STACKS == 1 ) - lea SYM (hiintstack),a0 | a0 = high end of intr stack - movec a0,isp | set interrupt stack -#endif - - jsr SYM (bsp_start) -#if ( M68K_HAS_SEPARATE_STACKS == 1 ) - move.l SYM (initial_isp),a0 - movec a0,isp - move.l SYM (initial_usp),a0 - movec a0,usp - move.l SYM (initial_msp),a0 - movec a0,msp -#else - movea.l SYM (initial_msp),a7 -#endif - move.w SYM (initial_sr),sr - rts - -END_CODE - -BEGIN_DATA - - PUBLIC (start_frame) -SYM (start_frame): - .space 4,0 - - PUBLIC (stack_start) -SYM (stack_start): - .space 4,0 -END_DATA - -BEGIN_BSS - - PUBLIC (environ) - .align 2 -SYM (environ): - .long 0 - - PUBLIC (initial_isp) -SYM (initial_isp): - .space 4 - - PUBLIC (initial_msp) -SYM (initial_msp): - .space 4 - - PUBLIC (initial_usp) -SYM (initial_usp): - .space 4 - - PUBLIC (initial_sr) -SYM (initial_sr): - .space 2 - - PUBLIC (heap_size) - .set SYM (heap_size),0x2000 - - PUBLIC (stack_size) - .set SYM (stack_size),0x1000 - - -END_DATA -END - - |