diff options
Diffstat (limited to 'bsps/m68k/mcf5225x/start/init5225x.c')
-rw-r--r-- | bsps/m68k/mcf5225x/start/init5225x.c | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/bsps/m68k/mcf5225x/start/init5225x.c b/bsps/m68k/mcf5225x/start/init5225x.c new file mode 100644 index 0000000000..caf7db1953 --- /dev/null +++ b/bsps/m68k/mcf5225x/start/init5225x.c @@ -0,0 +1,84 @@ +/* + * The license and distribution terms for this file may be + * found in the file LICENSE in this distribution or at + * http://www.rtems.org/license/LICENSE. + * + * This is where the real hardware setup is done. A minimal stack + * has been provided by the start.S code. No normal C or RTEMS + * functions can be called from here. + */ + +#include <bsp.h> +#include <bsp/bootcard.h> + +extern void _wr_vbr(uint32_t); + +extern long _d0_reset,_d1_reset,_M68kSpuriousInterruptCount; + +/* + * From linkcmds + */ + +extern uint8_t _INTERRUPT_VECTOR[]; + +extern uint8_t _clear_start[]; +extern uint8_t _clear_end[]; + +extern uint8_t _data_src_start[]; +extern uint8_t _data_dest_start[]; +extern uint8_t _data_dest_end[]; + +void Init5225x(void) +{ + register uint32_t i; + register uint32_t *dp, *sp; + register uint8_t *dbp, *sbp; + + /* + * Copy the vector table to RAM + */ + + if (&_VBR != (void *)_INTERRUPT_VECTOR) { + sp = (uint32_t *) _INTERRUPT_VECTOR; + dp = (uint32_t *) &_VBR; + for (i = 0; i < 256; i++) { + *dp++ = *sp++; + } + } + + /* + * Move initialized data from ROM to RAM. + */ + if (_data_src_start != _data_dest_start) { + dbp = (uint8_t *) _data_dest_start; + sbp = (uint8_t *) _data_src_start; + i = _data_dest_end - _data_dest_start; + while (i--) + *dbp++ = *sbp++; + } + + asm __volatile__ ("move.l %%d5,%0\n\t":"=r" (_d0_reset)); + asm __volatile__ ("move.l %%d6,%0\n\t":"=r" (_d1_reset)); + + /* + * Zero uninitialized data + */ + + if (_clear_start != _clear_end) { + sbp = _clear_start; + dbp = _clear_end; + i = dbp - sbp; + while (i--) + *sbp++ = 0; + } + +//_wr_vbr((uint32_t) &_VBR); + asm volatile("move.l %0,%%d7;movec %%d7,%%vbr\n\t"::"i"(&_VBR): "cc"); + + /* + * We have to call some kind of RTEMS function here! + */ + + boot_card(0); + for (;;) ; +} |