forked from Imagelibrary/rtems
9964895866
Adjust build support files to new directory layout. This patch is a part of the BSP source reorganization. Update #3285.
84 lines
1.9 KiB
C
84 lines
1.9 KiB
C
/*
|
|
* This file contains the ARM BSP startup package. It includes application,
|
|
* board, and monitor specific initialization and configuration. The generic CPU
|
|
* dependent initialization has been performed before this routine is invoked.
|
|
*/
|
|
|
|
/*
|
|
* Copyright (c) 2000 Canon Research Centre France SA.
|
|
* Emmanuel Raguet, mailto:raguet@crf.canon.fr
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#include <bsp.h>
|
|
#include <bsp/irq-generic.h>
|
|
#include <rtems/bspIo.h>
|
|
#include <s3c24xx.h>
|
|
|
|
/*
|
|
* BSP Specific Initialization in C
|
|
*/
|
|
static void bsp_start_default( void )
|
|
{
|
|
uint32_t cr;
|
|
uint32_t pend,last;
|
|
uint32_t REFCNT;
|
|
int i;
|
|
|
|
/* stop RTC */
|
|
#ifdef CPU_S3C2400
|
|
rTICINT = 0x0;
|
|
#else
|
|
rTICNT = 0x0;
|
|
#endif
|
|
/* stop watchdog,ADC and timers */
|
|
rWTCON = 0x0;
|
|
rTCON = 0x0;
|
|
rADCCON = 0x0;
|
|
|
|
/* disable interrupts */
|
|
rINTMOD = 0x0;
|
|
rINTMSK = BIT_ALLMSK; /* unmasked by drivers */
|
|
|
|
last = 0;
|
|
for(i=0; i<4; i++) {
|
|
pend = rSRCPND;
|
|
if(pend == 0 || pend == last)
|
|
break;
|
|
rSRCPND = pend;
|
|
rINTPND = pend;
|
|
last = pend;
|
|
}
|
|
|
|
/* setup clocks */
|
|
rCLKDIVN = M_CLKDIVN;
|
|
rMPLLCON = ((M_MDIV<<12)+(M_PDIV<<4)+M_SDIV);
|
|
/* setup rREFRESH
|
|
* period = 15.6 us, HCLK=66Mhz, (2048+1-15.6*66)
|
|
*/
|
|
REFCNT = 2048+1-(15.6*get_HCLK()/1000000);
|
|
rREFRESH = ((REFEN<<23)+(TREFMD<<22)+(Trp<<20)+(Trc<<18)+(Tchr<<16)+REFCNT);
|
|
|
|
/* set prescaler for timers 2,3,4 to 16(15+1) */
|
|
cr = rTCFG0 & 0xFFFF00FF;
|
|
rTCFG0 = (cr | (15<<8));
|
|
|
|
/* set prescaler for timers 0,1 to 1(0+1) */
|
|
cr = rTCFG0 & 0xFFFFFF00;
|
|
rTCFG0 = (cr | (0<<0));
|
|
|
|
/*
|
|
* Init rtems interrupt management
|
|
*/
|
|
bsp_interrupt_initialize();
|
|
}
|
|
|
|
/*
|
|
* By making this a weak alias for bsp_start_default, a brave soul
|
|
* can override the actual bsp_start routine used.
|
|
*/
|
|
void bsp_start (void) __attribute__ ((weak, alias("bsp_start_default")));
|