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annotate packages/hal/sh/edk/current/src/plf_misc.c @ 76:435cced73e2f ecos-v1_3_1-release

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eCos v1.3.1 merged from eCos master repository on 2000-03-27-23:22:51-BST
author jlarmour
date Tue, 28 Mar 2000 14:10:45 +0000
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435cced73e2f eCos v1.3.1 merged from eCos master repository on 2000-03-27-23:22:51-BST
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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): jskov
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35 // Contributors: jskov,nickg, jlarmour
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36 // Date: 1999-10-13
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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
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49 #include <cyg/hal/hal_arch.h> // architectural definitions
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50
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51 #include <cyg/hal/hal_intr.h> // Interrupt handling
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52
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53 #include <cyg/hal/hal_cache.h> // Cache handling
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54
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55 #ifdef CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS
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56 #include <cyg/hal/hal_stub.h> // stub functionality
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57 #endif
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58
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59 //--------------------------------------------------------------------------
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60 // Functions to support the detection and execution of a user provoked
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61 // program break. These are usually called from interrupt routines.
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62
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63 cyg_bool
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64 cyg_hal_is_break(char *buf, int size)
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65 {
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66 while( size )
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67 if( buf[--size] == 0x03 ) return true;
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68
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69 return false;
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70 }
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71
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72 void
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73 cyg_hal_user_break( CYG_ADDRWORD *regs )
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74 {
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75 #ifdef CYGDBG_HAL_DEBUG_GDB_BREAK_SUPPORT
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76 HAL_SavedRegisters *__sreg = (HAL_SavedRegisters *)regs;
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77 target_register_t __pc;
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78
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79 if (__sreg)
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80 __pc = (target_register_t) __sreg->pc;
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81 else
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82 __pc = (target_register_t) &&safe_breakpoint;
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83
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84 // Note: This would be better for the else case but doesn't work
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85 // at the moment. CR: 101357
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86 // __pc = (target_register_t) __builtin_return_address(0);
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87
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88 cyg_hal_gdb_interrupt (__pc);
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89
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90 safe_breakpoint:
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91 #elif defined(CYGSEM_HAL_USE_ROM_MONITOR_GDB_stubs)
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92
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93 // Note: Need to communicate to the ROM stub instead
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94 HAL_BREAKPOINT(breakinst);
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95
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96 #else
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97
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98 HAL_BREAKPOINT(breakinst);
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99
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100 #endif
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101
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102 }