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annotate packages/hal/sparc/erc32/current/src/hal_priv.c @ 208:e0c0827131d1 ecos

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Merge from eCos master repository on 2002-05-20-20:11:54-BST
author jlarmour
date Mon, 20 May 2002 22:19:26 +0000
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1 //===========================================================================
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2 //
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3 // hal_priv.c
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4 //
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5 // SPARC ERC32 Architecture sim-specific private variables
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6 //
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7 //===========================================================================
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8 //####ECOSGPLCOPYRIGHTBEGIN####
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9 // -------------------------------------------
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10 // This file is part of eCos, the Embedded Configurable Operating System.
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11 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
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12 //
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13 // eCos is free software; you can redistribute it and/or modify it under
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14 // the terms of the GNU General Public License as published by the Free
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15 // Software Foundation; either version 2 or (at your option) any later version.
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16 //
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17 // eCos is distributed in the hope that it will be useful, but WITHOUT ANY
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18 // WARRANTY; without even the implied warranty of MERCHANTABILITY or
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19 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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20 // for more details.
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21 //
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22 // You should have received a copy of the GNU General Public License along
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23 // with eCos; if not, write to the Free Software Foundation, Inc.,
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24 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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25 //
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26 // As a special exception, if other files instantiate templates or use macros
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27 // or inline functions from this file, or you compile this file and link it
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28 // with other works to produce a work based on this file, this file does not
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29 // by itself cause the resulting work to be covered by the GNU General Public
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30 // License. However the source code for this file must still be made available
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31 // in accordance with section (3) of the GNU General Public License.
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32 //
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33 // This exception does not invalidate any other reasons why a work based on
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34 // this file might be covered by the GNU General Public License.
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35 //
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36 // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
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37 // at http://sources.redhat.com/ecos/ecos-license
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38 // -------------------------------------------
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39 //####ECOSGPLCOPYRIGHTEND####
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40 //===========================================================================
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41 //#####DESCRIPTIONBEGIN####
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42 //
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43 // Author(s): hmt
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44 // Contributors: hmt
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45 // Date: 1999-02-20
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46 // Purpose: private vars for SPARC ERC32.
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47 //
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48 //####DESCRIPTIONEND####
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49 //
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50 //===========================================================================
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51
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52
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53 #include <cyg/hal/hal_intr.h>
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54 #include <cyg/hal/hal_arch.h>
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55
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56 // ------------------------------------------------------------------------
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57 // Clock static to keep period recorded.
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58 cyg_int32 cyg_hal_sparc_clock_period = 0;
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59
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60 // ------------------------------------------------------------------------
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61 // Board specific startups.
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62
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63 extern void hal_board_prestart( void );
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64 extern void hal_board_poststart( void );
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65
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66 void hal_board_prestart( void )
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67 {
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68 }
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69
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70 void hal_board_poststart( void )
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71 {
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72 HAL_ENABLE_INTERRUPTS();
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73 // OK to do this post constructors, and good for testing.
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74 }
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75
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76 cyg_uint32
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77 hal_lsbit_index(cyg_uint32 mask)
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78 {
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79 int i;
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80 for (i = 0; i < 32; i++) {
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81 if (mask & (1<<i)) return ((cyg_uint32)i);
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82 }
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83 return ((cyg_uint32)-1);
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84 }
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85
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86 cyg_uint32
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87 hal_msbit_index(cyg_uint32 mask)
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88 {
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89 int i;
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90 for (i = 31; i >= 0; i--) {
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91 if (mask & (1<<i)) return ((cyg_uint32)i);
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92 }
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93 return ((cyg_uint32)-1);
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94 }
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95
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96 void
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97 hal_idle_thread_action(cyg_uint32 loop_count)
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98 {
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99 *((volatile cyg_uint32 *) 0x01f80008) = 0;
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100 }
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101
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102
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103 // EOF hal_priv.c