OpenWrt – Rev 4
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//*----------------------------------------------------------------------------
//* ATMEL Microcontroller Software Support - ROUSSET -
//*----------------------------------------------------------------------------
//* The software is delivered "AS IS" without warranty or condition of any
//* kind, either express, implied or statutory. This includes without
//* limitation any warranty or condition with respect to merchantability or
//* fitness for any particular purpose, or against the infringements of
//* intellectual property rights of others.
//*----------------------------------------------------------------------------
//* File Name : init.c
//* Object : Low level initialisations written in C
//* Creation : HIi 10/10/2003
//*
//*----------------------------------------------------------------------------
#include "config.h"
#include "AT91RM9200.h"
#include "lib_AT91RM9200.h"
#include "stdio.h"
//*----------------------------------------------------------------------------
//* \fn AT91F_DataAbort
//* \brief This function reports an Abort
//*----------------------------------------------------------------------------
static void AT91F_SpuriousHandler()
{
puts("ISI");
while (1);
}
//*----------------------------------------------------------------------------
//* \fn AT91F_DataAbort
//* \brief This function reports an Abort
//*----------------------------------------------------------------------------
static void AT91F_DataAbort()
{
puts("IDA");
while (1);
}
//*----------------------------------------------------------------------------
//* \fn AT91F_FetchAbort
//* \brief This function reports an Abort
//*----------------------------------------------------------------------------
static void AT91F_FetchAbort()
{
puts("IFA");
while (1);
}
//*----------------------------------------------------------------------------
//* \fn AT91F_UndefHandler
//* \brief This function reports that no handler have been set for current IT
//*----------------------------------------------------------------------------
static void AT91F_UndefHandler()
{
puts("IUD");
while (1);
}
//*--------------------------------------------------------------------------------------
//* Function Name : AT91F_InitSdram
//* Object : Initialize the SDRAM
//* Input Parameters :
//* Output Parameters :
//*--------------------------------------------------------------------------------------
static void AT91F_InitSdram()
{
int *pRegister;
//* Configure PIOC as peripheral (D16/D31)
AT91F_PIO_CfgPeriph(
AT91C_BASE_PIOC, // PIO controller base address
0xFFFF0030,
0
);
//*Init SDRAM
pRegister = (int *)0xFFFFFF98;
*pRegister = 0x2188c155;
pRegister = (int *)0xFFFFFF90;
*pRegister = 0x2;
pRegister = (int *)0x20000000;
*pRegister = 0;
pRegister = (int *)0xFFFFFF90;
*pRegister = 0x4;
pRegister = (int *)0x20000000;
*pRegister = 0;
*pRegister = 0;
*pRegister = 0;
*pRegister = 0;
*pRegister = 0;
*pRegister = 0;
*pRegister = 0;
*pRegister = 0;
pRegister = (int *)0xFFFFFF90;
*pRegister = 0x3;
pRegister = (int *)0x20000080;
*pRegister = 0;
pRegister = (int *)0xFFFFFF94;
*pRegister = 0x2e0;
pRegister = (int *)0x20000000;
*pRegister = 0;
pRegister = (int *)0xFFFFFF90;
*pRegister = 0x00;
pRegister = (int *)0x20000000;
*pRegister = 0;
}
//*----------------------------------------------------------------------------
//* \fn AT91F_InitFlash
//* \brief This function performs low level HW initialization
//*----------------------------------------------------------------------------
static void AT91F_InitMemories()
{
int *pEbi = (int *)0xFFFFFF60;
//* Setup MEMC to support all connected memories (CS0 = FLASH; CS1=SDRAM)
pEbi = (int *)0xFFFFFF60;
*pEbi = 0x00000002;
//* CS0 cs for flash
pEbi = (int *)0xFFFFFF70;
*pEbi = 0x00003284;
AT91F_InitSdram();
}
//*----------------------------------------------------------------------------
//* \fn AT91F_LowLevelInit
//* \brief This function performs very low level HW initialization
//*----------------------------------------------------------------------------
void AT91F_LowLevelInit(void)
{
int i;
// Init Interrupt Controller
AT91F_AIC_Open(
AT91C_BASE_AIC, // pointer to the AIC registers
AT91C_AIC_BRANCH_OPCODE, // IRQ exception vector
AT91F_UndefHandler, // FIQ exception vector
AT91F_UndefHandler, // AIC default handler
AT91F_SpuriousHandler, // AIC spurious handler
0); // Protect mode
// Perform 8 End Of Interrupt Command to make sýre AIC will not Lock out nIRQ
for(i=0; i<8; i++)
AT91F_AIC_AcknowledgeIt(AT91C_BASE_AIC);
AT91F_AIC_SetExceptionVector((unsigned int *)0x0C, AT91F_FetchAbort);
AT91F_AIC_SetExceptionVector((unsigned int *)0x10, AT91F_DataAbort);
AT91F_AIC_SetExceptionVector((unsigned int *)0x4, AT91F_UndefHandler);
//Initialize SDRAM and Flash
AT91F_InitMemories();
}