gumstix/start/bspstart.c

0001 /*
0002  *  By Yang Xi <hiyangxi@gmail.com>.
0003  *
0004  *  The license and distribution terms for this file may be
0005  *  found in the file LICENSE in this distribution or at
0006  *  http://www.rtems.org/license/LICENSE.
0007  */
0008
0009 #include <bsp.h>
0010 #include <bsp/irq-generic.h>
0011 #include <rtems/libcsupport.h>
0012 #include <rtems/libio.h>
0013 #include <pxa255.h>
0014
0015 /*
0016  *
0017  * NAME: bsp_start_default - BSP initialization function
0018  *
0019  * DESCRIPTION:
0020  *   This function is called before RTEMS is initialized and used
0021  *   adjust the kernel's configuration.
0022  *
0023  *   This function also configures the CPU's memory protection unit.
0024  *
0025  * RESTRICTIONS/LIMITATIONS:
0026  *   Since RTEMS is not configured, no RTEMS functions can be called.
0027  *
0028  */
0029 static void bsp_start_default( void )
0030 {
0031   /* disable interrupts */
0032   XSCALE_INT_ICMR = 0x0;
0033   bsp_interrupt_initialize();
0034 } /* bsp_start */
0035
0036 /*
0037  *  By making this a weak alias for bsp_start_default, a brave soul
0038  *  can override the actual bsp_start routine used.
0039  */
0040 void bsp_start (void) __attribute__ ((weak, alias("bsp_start_default")));