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authorJames <>2015-11-04 11:49:21 +0000
committerJames <>2015-11-04 11:49:21 +0000
commit716ca530e1c4515d8683c9d5be3d56b301758b66 (patch)
tree700eb5bcc1a462a5f21dcec15ce7c97ecfefa772 /target/linux/at91/image/dfboot/src/init.c
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diff --git a/target/linux/at91/image/dfboot/src/init.c b/target/linux/at91/image/dfboot/src/init.c
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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 sıre 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();
+
+}
+