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annotate packages/hal/m68k/mcf52xx/mcf5272/m5272c3/current/src/platform.c @ 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
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1 //=============================================================================
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2 //
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3 // platform.c
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4 //
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5 // M5272C3 platform code
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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) 2003, 2004, 2006, 2008 Free Software Foundation, 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
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16 // version.
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17 //
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18 // eCos is distributed in the hope that it will be useful, but WITHOUT
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19 // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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20 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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21 // for more details.
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22 //
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23 // You should have received a copy of the GNU General Public License
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24 // along with eCos; if not, write to the Free Software Foundation, Inc.,
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25 // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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26 //
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27 // As a special exception, if other files instantiate templates or use
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28 // macros or inline functions from this file, or you compile this file
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29 // and link it with other works to produce a work based on this file,
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30 // this file does not by itself cause the resulting work to be covered by
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31 // the GNU General Public License. However the source code for this file
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32 // must still be made available in accordance with section (3) of the GNU
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33 // General Public License v2.
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34 //
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35 // This exception does not invalidate any other reasons why a work based
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36 // on this file might be covered by the GNU General Public License.
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37 // -------------------------------------------
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38 // ####ECOSGPLCOPYRIGHTEND####
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39 //=============================================================================
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40 //#####DESCRIPTIONBEGIN####
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41 //
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42 // Author(s): bartv
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43 // Date: 2003-06-04
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44 //
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45 //####DESCRIPTIONEND####
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46 //=============================================================================
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47
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48 #include <pkgconf/system.h>
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49 #include <pkgconf/hal.h>
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50 #include <pkgconf/hal_m68k_m5272c3.h>
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51 #include <cyg/hal/hal_arch.h>
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52 #include <cyg/hal/hal_intr.h>
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53 #include <cyg/hal/hal_cache.h>
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54 #include <cyg/hal/hal_io.h>
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55 #include <cyg/hal/hal_diag.h>
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56 #include <cyg/hal/hal_if.h>
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57
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58 // ----------------------------------------------------------------------------
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59 // Platform initialization. This is called early on from
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60 // hal_m68k_startup(), once the C environment has been set up. We are
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61 // running on the startup stack and interrupts are disabled. It is
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62 // assumed that the memory map is already sane - either the ROM
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63 // monitor or the assembler startup code should have taken care of
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64 // that.
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65 //
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66 // For ROM/ROMFFE startup the assumption is that we have just come
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67 // out of reset, either because of a hard reset or because a soft
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68 // reset activated the watchdog. Hence we can assume all peripherals
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69 // are at their default settings.
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70
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71 void
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72 hal_m68k_m5272c3_init(void)
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73 {
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74 // Start with the hardware. If this code is reached from a hard
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75 // reset, RedBoot or dBUG then most of the hardware should be in a
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76 // reasonable state. For a soft reset assume that the watchdog has
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77 // been used so again everything should be in a reasonable state.
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78 // Hence we only need to worry about registers where the default
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79 // settings are inappropriate.
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80
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81 // After a power-up the ethernet phy needs a bit of time to negotiate
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82 // the link. Without this delay packets appear to go out but are
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83 // just lost, which is a problem for bootp.
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84 #if defined(CYGPKG_DEVS_ETH_MCFxxxx) && (defined(CYG_HAL_STARTUP_ROM) || defined(CYG_HAL_STARTUP_ROMFFE))
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85 HAL_DELAY_US(10000);
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86 #endif
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87 }