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annotate packages/hal/mips/ref4955/current/src/plf_misc.c @ 134:d2f49caf9e38 ecos-sw-2000-11-03

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Merge from eCos master repository on 2000-11-03-09:00:49-GMT
author jlarmour
date Fri, 03 Nov 2000 21:17:40 +0000
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children e0c0827131d1
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1 //==========================================================================
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2 //
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3 // plf_misc.c
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4 //
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5 // HAL platform miscellaneous functions
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6 //
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7 //==========================================================================
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8 //####COPYRIGHTBEGIN####
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9 //
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10 // -------------------------------------------
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11 // The contents of this file are subject to the Red Hat eCos Public License
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12 // Version 1.1 (the "License"); you may not use this file except in
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13 // compliance with the License. You may obtain a copy of the License at
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14 // http://www.redhat.com/
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15 //
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16 // Software distributed under the License is distributed on an "AS IS"
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17 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
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18 // License for the specific language governing rights and limitations under
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19 // the License.
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20 //
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21 // The Original Code is eCos - Embedded Configurable Operating System,
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22 // released September 30, 1998.
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23 //
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24 // The Initial Developer of the Original Code is Red Hat.
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25 // Portions created by Red Hat are
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26 // Copyright (C) 1998, 1999, 2000 Red Hat, Inc.
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27 // All Rights Reserved.
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28 // -------------------------------------------
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29 //
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30 //####COPYRIGHTEND####
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31 //==========================================================================
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32 //#####DESCRIPTIONBEGIN####
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33 //
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34 // Author(s): nickg
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35 // Contributors: nickg, jlarmour, jskov
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36 // Date: 2000-05-15
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37 // Purpose: HAL miscellaneous functions
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38 // Description: This file contains miscellaneous functions provided by the
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39 // HAL.
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40 //
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41 //####DESCRIPTIONEND####
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42 //
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43 //==========================================================================
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44
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45 #include <pkgconf/hal.h>
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46
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47 #include <cyg/infra/cyg_type.h> // Base types
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48 #include <cyg/infra/cyg_trac.h> // tracing macros
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49 #include <cyg/infra/cyg_ass.h> // assertion macros
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50
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51 #include <cyg/hal/hal_arch.h> // architectural definitions
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52
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53 #include <cyg/hal/hal_intr.h> // Interrupt handling
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54
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55 #include <cyg/hal/hal_cache.h> // Cache handling
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56 #include <cyg/hal/drv_api.h> // CYG_ISR_HANDLED
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57
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58 #include <cyg/hal/hal_if.h> // Calling interface definitions
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59 #include <cyg/hal/hal_misc.h> // Helper functions
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60
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61 //--------------------------------------------------------------------------
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62
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63 #define CYGARC_REG_SUPERIO_IREG 0xb4000398
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64 #define CYGARC_REG_SUPERIO_DREG 0xb4000399
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65
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66 #define CYGARC_REG_SUPERIO_FER 0x00 // function enable
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67 #define CYGARC_REG_SUPERIO_FAR 0x01 // function address
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68 #define CYGARC_REG_SUPERIO_PTR 0x02 // power and test
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69 #define CYGARC_REG_SUPERIO_CLK 0x51 // clock controller
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70
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71
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72 #define CYGARC_REG_SUPERIO_FER_PAR 0x01
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73 #define CYGARC_REG_SUPERIO_FER_SCC1 0x02
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74 #define CYGARC_REG_SUPERIO_FER_SCC2 0x04
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75
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76 #define CYGARC_REG_SUPERIO_CLK_14M 0x00 // 14MHz source
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77 #define CYGARC_REG_SUPERIO_CLK_CME 0x04 // clock multiplier enabled
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78
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79 #define CYGARC_REG_SUPERIO_PTR_PPEXT 0x80 // extended
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80
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81
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82
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83
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84 static void write_super_io(cyg_uint8 offset, cyg_uint8 data)
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85 {
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86 HAL_WRITE_UINT8(CYGARC_REG_SUPERIO_IREG, offset);
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87 HAL_WRITE_UINT8(CYGARC_REG_SUPERIO_DREG, data);
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88 HAL_WRITE_UINT8(CYGARC_REG_SUPERIO_DREG, data);
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89 }
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90
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91 void hal_platform_init(void)
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92 {
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93 hal_if_init();
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94
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95 // Configure the SuperIO chip
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96 write_super_io(CYGARC_REG_SUPERIO_FER,
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97 CYGARC_REG_SUPERIO_FER_SCC1|CYGARC_REG_SUPERIO_FER_SCC2);
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98 write_super_io(CYGARC_REG_SUPERIO_FAR, 0x10);
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99 write_super_io(CYGARC_REG_SUPERIO_CLK,
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100 CYGARC_REG_SUPERIO_CLK_14M|CYGARC_REG_SUPERIO_CLK_CME);
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101
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102 // Set up VSC320 interrupt controller. INT1 must merge INT2 and
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103 // INT3 according to the platform specification.
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104 HAL_WRITE_UINT32(CYGARC_REG_INT_CFG1,
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105 CYGARC_REG_INT_CFG_INT2|CYGARC_REG_INT_CFG_INT3);
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106
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107 // Unmask vectors which are entry points for interrupt controllers
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108 HAL_INTERRUPT_UNMASK(CYGNUM_HAL_INTERRUPT_V320USC_INT0);
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109 HAL_INTERRUPT_UNMASK(CYGNUM_HAL_INTERRUPT_V320USC_INT1);
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110 HAL_INTERRUPT_UNMASK(CYGNUM_HAL_INTERRUPT_IO);
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111 }
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112
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113 //--------------------------------------------------------------------------
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114 // End of plf_misc.c