Root/target/linux/at91/image/dfboot/src/init.c

1//*----------------------------------------------------------------------------
2//* ATMEL Microcontroller Software Support - ROUSSET -
3//*----------------------------------------------------------------------------
4//* The software is delivered "AS IS" without warranty or condition of any
5//* kind, either express, implied or statutory. This includes without
6//* limitation any warranty or condition with respect to merchantability or
7//* fitness for any particular purpose, or against the infringements of
8//* intellectual property rights of others.
9//*----------------------------------------------------------------------------
10//* File Name : init.c
11//* Object : Low level initialisations written in C
12//* Creation : HIi 10/10/2003
13//*
14//*----------------------------------------------------------------------------
15#include "config.h"
16#include "AT91RM9200.h"
17#include "lib_AT91RM9200.h"
18#include "stdio.h"
19
20//*----------------------------------------------------------------------------
21//* \fn AT91F_DataAbort
22//* \brief This function reports an Abort
23//*----------------------------------------------------------------------------
24static void AT91F_SpuriousHandler()
25{
26    puts("ISI");
27    while (1);
28}
29
30
31//*----------------------------------------------------------------------------
32//* \fn AT91F_DataAbort
33//* \brief This function reports an Abort
34//*----------------------------------------------------------------------------
35static void AT91F_DataAbort()
36{
37    puts("IDA");
38    while (1);
39}
40
41//*----------------------------------------------------------------------------
42//* \fn AT91F_FetchAbort
43//* \brief This function reports an Abort
44//*----------------------------------------------------------------------------
45static void AT91F_FetchAbort()
46{
47    puts("IFA");
48    while (1);
49}
50
51//*----------------------------------------------------------------------------
52//* \fn AT91F_UndefHandler
53//* \brief This function reports that no handler have been set for current IT
54//*----------------------------------------------------------------------------
55static void AT91F_UndefHandler()
56{
57    puts("IUD");
58    while (1);
59}
60
61
62//*--------------------------------------------------------------------------------------
63//* Function Name : AT91F_InitSdram
64//* Object : Initialize the SDRAM
65//* Input Parameters :
66//* Output Parameters :
67//*--------------------------------------------------------------------------------------
68static void AT91F_InitSdram()
69{
70    int *pRegister;
71    
72    //* Configure PIOC as peripheral (D16/D31)
73    
74    AT91F_PIO_CfgPeriph(
75        AT91C_BASE_PIOC, // PIO controller base address
76        0xFFFF0030,
77        0
78    );
79    
80    //*Init SDRAM
81    pRegister = (int *)0xFFFFFF98;
82    *pRegister = 0x2188c155;
83    pRegister = (int *)0xFFFFFF90;
84    *pRegister = 0x2;
85    pRegister = (int *)0x20000000;
86    *pRegister = 0;
87    pRegister = (int *)0xFFFFFF90;
88    *pRegister = 0x4;
89    pRegister = (int *)0x20000000;
90    *pRegister = 0;
91    *pRegister = 0;
92    *pRegister = 0;
93    *pRegister = 0;
94    *pRegister = 0;
95    *pRegister = 0;
96    *pRegister = 0;
97    *pRegister = 0;
98    pRegister = (int *)0xFFFFFF90;
99    *pRegister = 0x3;
100    pRegister = (int *)0x20000080;
101    *pRegister = 0;
102
103    pRegister = (int *)0xFFFFFF94;
104    *pRegister = 0x2e0;
105    pRegister = (int *)0x20000000;
106    *pRegister = 0;
107
108    pRegister = (int *)0xFFFFFF90;
109    *pRegister = 0x00;
110    pRegister = (int *)0x20000000;
111    *pRegister = 0;
112}
113
114
115//*----------------------------------------------------------------------------
116//* \fn AT91F_InitFlash
117//* \brief This function performs low level HW initialization
118//*----------------------------------------------------------------------------
119static void AT91F_InitMemories()
120{
121    int *pEbi = (int *)0xFFFFFF60;
122
123    //* Setup MEMC to support all connected memories (CS0 = FLASH; CS1=SDRAM)
124    pEbi = (int *)0xFFFFFF60;
125    *pEbi = 0x00000002;
126
127    //* CS0 cs for flash
128    pEbi = (int *)0xFFFFFF70;
129    *pEbi = 0x00003284;
130    
131    AT91F_InitSdram();
132}
133
134
135
136//*----------------------------------------------------------------------------
137//* \fn AT91F_LowLevelInit
138//* \brief This function performs very low level HW initialization
139//*----------------------------------------------------------------------------
140void AT91F_LowLevelInit(void)
141{
142    int i;
143
144    // Init Interrupt Controller
145    AT91F_AIC_Open(
146        AT91C_BASE_AIC, // pointer to the AIC registers
147        AT91C_AIC_BRANCH_OPCODE, // IRQ exception vector
148        AT91F_UndefHandler, // FIQ exception vector
149        AT91F_UndefHandler, // AIC default handler
150        AT91F_SpuriousHandler, // AIC spurious handler
151        0); // Protect mode
152
153    // Perform 8 End Of Interrupt Command to make sıre AIC will not Lock out nIRQ
154    for(i=0; i<8; i++)
155        AT91F_AIC_AcknowledgeIt(AT91C_BASE_AIC);
156
157    AT91F_AIC_SetExceptionVector((unsigned int *)0x0C, AT91F_FetchAbort);
158    AT91F_AIC_SetExceptionVector((unsigned int *)0x10, AT91F_DataAbort);
159    AT91F_AIC_SetExceptionVector((unsigned int *)0x4, AT91F_UndefHandler);
160
161    //Initialize SDRAM and Flash
162    AT91F_InitMemories();
163
164}
165
166

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