diff options
Diffstat (limited to 'c/src/lib/libbsp/powerpc/mvme3100/start/start.S')
| -rw-r--r-- | c/src/lib/libbsp/powerpc/mvme3100/start/start.S | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/powerpc/mvme3100/start/start.S b/c/src/lib/libbsp/powerpc/mvme3100/start/start.S new file mode 100644 index 0000000000..cab9261c0a --- /dev/null +++ b/c/src/lib/libbsp/powerpc/mvme3100/start/start.S @@ -0,0 +1,67 @@ +/* + * start.S : RTEMS entry point + * + * Copyright (C) 1999 Eric Valette. valette@crf.canon.fr + * + * The license and distribution terms for this file may be + * found in found in the file LICENSE in this distribution or at + * http://www.rtems.com/license/LICENSE. + * + * Modified for mvme3100 by T. Straumann, 2007. + * + * $Id$ + * + */ + +#include <rtems/asm.h> +#include <rtems/score/cpu.h> +#include <rtems/powerpc/powerpc.h> + +#include <bspopts.h> + +#define SYNC \ + sync; \ + isync + +#define KERNELBASE 0x0 + + .text + .globl __rtems_entry_point + .type __rtems_entry_point,@function +__rtems_entry_point: + mr r31,r3 + mr r30,r4 + mr r29,r5 + mr r28,r6 + mr r27,r7 + + /* Use MotLoad's TLB setup for now; caches are on already */ + bl __eabi /* setup EABI and SYSV environment */ + bl zero_bss + /* + * restore original args + */ + mr r3,r31 + mr r4,r30 + mr r5,r29 + mr r6,r28 + mr r7,r27 + bl save_boot_params + /* + * stack = &__rtems_end + 4096 + */ + addis r9,r0, __rtems_end+(4096-PPC_MINIMUM_STACK_FRAME_SIZE)@ha + addi r9,r9, __rtems_end+(4096-PPC_MINIMUM_STACK_FRAME_SIZE)@l + /* align down to 16-bytes */ + li r5, (CPU_STACK_ALIGNMENT - 1) + andc r1, r9, r5 + /* + * We are now in a environment that is totally independent from + * bootloader setup. + */ + lis r5,environ@ha + la r5,environ@l(r5) /* environp */ + li r4, 0 /* argv */ + li r3, 0 /* argc */ + bl boot_card + /* point of no return: reset board here ? */ |