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annotate packages/hal/m68k/mcf52xx/var/current/src/mcf52xx_asm.S @ 2729:74dbf4c3f2e1 after-copyright-change-20090129

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Update all copyright banners to reflect FSF ownership; fix and improve licence text.
author jlarmour
date Thu, 29 Jan 2009 17:47:46 +0000
parents 2bff610f66e7
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1 // #========================================================================
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2 // #
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3 // # mcfxxxx_asm.S
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4 // #
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5 // # Miscellaneous assembler support functions for an mcfxxxx
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6 // #
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7 // #========================================================================
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8 //=============================================================================
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9 // ####ECOSGPLCOPYRIGHTBEGIN####
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10 // -------------------------------------------
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11 // This file is part of eCos, the Embedded Configurable Operating System.
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12 // Copyright (C) 2008 Free Software Foundation, Inc.
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13 //
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14 // eCos is free software; you can redistribute it and/or modify it under
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15 // the terms of the GNU General Public License as published by the Free
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16 // Software Foundation; either version 2 or (at your option) any later
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17 // version.
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18 //
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19 // eCos is distributed in the hope that it will be useful, but WITHOUT
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text.
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20 // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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21 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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22 // for more details.
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23 //
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24 // You should have received a copy of the GNU General Public License
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25 // along with eCos; if not, write to the Free Software Foundation, Inc.,
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26 // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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27 //
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28 // As a special exception, if other files instantiate templates or use
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29 // macros or inline functions from this file, or you compile this file
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30 // and link it with other works to produce a work based on this file,
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31 // this file does not by itself cause the resulting work to be covered by
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32 // the GNU General Public License. However the source code for this file
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33 // must still be made available in accordance with section (3) of the GNU
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34 // General Public License v2.
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35 //
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36 // This exception does not invalidate any other reasons why a work based
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37 // on this file might be covered by the GNU General Public 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): bartv
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44 // Date: 2008-01-14
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45 //
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46 //###DESCRIPTIONEND####
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47 //========================================================================
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48
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49 #include <pkgconf/hal_m68k_mcfxxxx.h>
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50 #include <cyg/hal/arch.inc>
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51 #include <cyg/hal/var_io.h>
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52
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53 .file "mcfxxxx_asm.S"
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54
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55 #ifdef CYGINT_HAL_M68K_MCFxxxx_SOFTWARE_PROFILE_TIMER
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56 // See also hal_enable_profile_timer() in mcfxxxx.c
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57
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58 // This VSR should call __profile_hit() with a single argument,
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59 // the interrupted PC. The VSR has been installed as a
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60 // high-priority interrupt source, so there is no need to worry
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61 // about nested interrupts or an interrupt stack.
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62 .extern __profile_hit
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63
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64 FUNC_START(hal_mcfxxxx_profile_vsr)
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65 // On entry sp[0] holds sr and sp[1] holds the pc.
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66 // Save the caller-save integer registers. There are no floating
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67 // point registers to worry about. Make space for the argument
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68 // to __profile_hit() while we are at it.
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69 sub.l #20, %sp
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70 movem.l %d0-%d1/%a0-%a1, 4(%sp)
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71
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72 // Now pick up the interrupted PC from its new offset and push it
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73 // on the stack for __profile_hit().
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74 move.l 24(%sp),(%sp)
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75 jbsr __profile_hit
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76
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77 // The timer runs in restart mode, but the interrupt bit has to be reset.
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78 move.l # (HAL_MCFxxxx_PITx_PCSR_PRE_64 + HAL_MCFxxxx_PITx_PCSR_OVW + \
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79 HAL_MCFxxxx_PITx_PCSR_PIE + HAL_MCFxxxx_PITx_PCSR_PIF + \
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80 HAL_MCFxxxx_PITx_PCSR_RLD + HAL_MCFxxxx_PITx_PCSR_EN), %d0
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81 move.w %d0, HAL_MCFxxxx_PROFILE_TIMER_BASE + HAL_MCFxxxx_PITx_PCSR
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82
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83 movem.l 4(%sp), %d0-%d1/%a0-%a1
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84 add.l #20, %sp
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85 rte
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86 #endif
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87
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88 .end