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annotate packages/hal/arm/at91/current/include/hal_platform_setup.h @ 175:e7780801e1a7

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Merge from eCos master repository on 2001-07-31-19:15:01-BST
author jlarmour
date Tue, 31 Jul 2001 21:15:36 +0000
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1 #ifndef CYGONCE_HAL_PLATFORM_SETUP_H
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2 #define CYGONCE_HAL_PLATFORM_SETUP_H
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3
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4 /*=============================================================================
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5 //
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6 // hal_platform_setup.h
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7 //
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8 // Platform specific support for HAL (assembly code)
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9 //
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10 //=============================================================================
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11 //####COPYRIGHTBEGIN####
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12 //
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13 // -------------------------------------------
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14 // The contents of this file are subject to the Red Hat eCos Public License
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15 // Version 1.1 (the "License"); you may not use this file except in
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16 // compliance with the License. You may obtain a copy of the License at
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17 // http://www.redhat.com/
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18 //
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19 // Software distributed under the License is distributed on an "AS IS"
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20 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
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21 // License for the specific language governing rights and limitations under
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22 // the License.
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23 //
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24 // The Original Code is eCos - Embedded Configurable Operating System,
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25 // released September 30, 1998.
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26 //
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27 // The Initial Developer of the Original Code is Red Hat.
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28 // Portions created by Red Hat are
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29 // Copyright (C) 1998, 1999, 2000, 2001 Red Hat, Inc.
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30 // All Rights Reserved.
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31 // -------------------------------------------
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32 //
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33 //####COPYRIGHTEND####
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34 //=============================================================================
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35 //#####DESCRIPTIONBEGIN####
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36 //
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37 // Author(s): gthomas
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38 // Contributors:gthomas
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39 // Date: 2001-07-12
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40 // Purpose: AT91/EB40 platform specific support routines
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41 // Description:
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42 // Usage: #include <cyg/hal/hal_platform_setup.h>
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43 //
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44 //####DESCRIPTIONEND####
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45 //
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46 //===========================================================================*/
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47
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48 #include <cyg/hal/plf_io.h>
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49
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50 #if defined(CYG_HAL_STARTUP_ROM) || defined(CYG_HAL_STARTUP_ROMRAM)
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51
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52 .macro _setup
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53 ldr r10,=_InitMemory // Initialize memory controller
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54 movs r0,pc,lsr #20 // If ROM startup, PC < 0x100000
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55 moveq r10,r10,lsl #12 // mask address to low 20 bits
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56 moveq r10,r10,lsr #12
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57 ldmia r10!,{r0-r9,r11-r12} // Table of initialization constants
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58 #if defined(CYG_HAL_STARTUP_ROMRAM)
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59 ldr r10,=0x0000FFFF
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60 and r12,r12,r10
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61 ldr r10,=0x01010000
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62 orr r12,r12,r10
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63 #endif
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64 stmia r11!,{r0-r9} // Write to controller
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65 mov pc,r12 // Change address space, break pipeline
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66 _InitMemory:
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67 .long 0x01002535 // 0x01000000, 16MB, 2 cycles added after transfer, 16-bit, 6 wait states
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68 .long 0x02002121 // 0x02000000, 16MB, 0 cycles added after transfer, 16-bit, 1 wait state
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69 .long 0x20000000 // unused
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70 .long 0x30000000 // unused
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71 .long 0x40000000 // unused
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72 .long 0x50000000 // unused
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73 .long 0x60000000 // unused
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74 .long 0x70000000 // unused
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75 .long 0x00000001 // REMAP commande
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76 .long 0x00000006 // 7 memory regions, standard read
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77 .long AT91_EBI // External Bus Interface address
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78 .long 10f // address where to jump
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79 10:
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80
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81 #if defined(CYG_HAL_STARTUP_ROMRAM)
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82 ldr r0,=0x01010000 // Relocate FLASH/ROM to on-chip RAM
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83 ldr r1,=0x02000000 // RAM base & length
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84 ldr r2,=0x02010000
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85 20: ldr r3,[r0],#4
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86 str r3,[r1],#4
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87 cmp r1,r2
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88 bne 20b
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89 ldr r0,=30f
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90 mov pc,r0
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91 30:
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92 #endif
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93
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94 ldr r0,=AT91_PS // Power saving interface
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95 ldr r1,=0xFFFFFFFF // Enable all peripheral [clocks]
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96 str r1,[r0,#AT91_PS_PCER]
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97 ldr r0,=AT91_PIO // Disable PIO (so peripherals can use bits)
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98 ldr r1,=0x0070FE49 // UART, FIQ, EINT, Timer clocks
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99 str r1,[r0,#AT91_PIO_PDR]
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100 ldr r1,=0x000001B6 // LEDs
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101 str r1,[r0,#AT91_PIO_OER]
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102 str r1,[r0,#AT91_PIO_SODR]
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103 .endm
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104
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105 #define CYGSEM_HAL_ROM_RESET_USES_JUMP
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106 #define PLATFORM_SETUP1 _setup
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107 #else
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108 #define PLATFORM_SETUP1
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109 #endif
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110
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111 //-----------------------------------------------------------------------------
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112 // end of hal_platform_setup.h
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113 #endif // CYGONCE_HAL_PLATFORM_SETUP_H