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annotate packages/devs/eth/arm/ebsa285/current/ChangeLog @ 84:489eb5632bc3 ecos-sw-2000-04-28

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Merge from eCos master repository on 2000-04-28-18:44:39-BST
author jlarmour
date Fri, 28 Apr 2000 18:18:36 +0000
parents 6736c52df507
children afdeb44241de
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1 2000-04-27 Hugo Tyson <hmt@cygnus.co.uk>
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2
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3 * src/if_ebsa285.c: A serious re-write. This cuts out a lot of
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4 code from the old version and improves the performance greatly.
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5
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6 The cruft was mainly doing lots of explicit event communication
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7 between the ISR and DSR, when in fact all the state needed is
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8 present in the tx/rx rings. So both ISRs and DSRs regard their
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9 call as an opportunity to progress everything they can, rather
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10 than only dealing with one interrupt cause at a time; the
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11 connection between them is now rather looser.
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12
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13 Interrups can now be re-enabled after the ISR (in other words they
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14 are not masked in the ISR), no need to wait for the DSR, but in
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15 consequence some DSR code must mask/unmask intrs as it works.
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16
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17 The 82559 appears to be a little slow in reacting to commands and
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18 state changes, so some interrupts were being lost - or persisting
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19 beyond their desired life - so there's some kinda polling code to
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20 deal with that also. We also rely on the foreground to kind of
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21 poll in the same way, in the send/can_send calls - we know the
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22 stack will re-try if necessary, though this is rare.
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23
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24 The driver now works (albeit at much reduced performance) with as
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25 few as 6 rx and tx buffers - in other words the "queue full/out of
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26 rx buffers" states have been tested and all is well. It works
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27 generally fine with 8 buffers of each kind.
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28
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29 The mux ISR and DSR are now rather more polled than the old
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30 versions; we just try to do things with both devices (if active)
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31 by simply calling each unitary ISR/DSR respectively.
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32
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33 I also re-ordered some of the code, moving utilities to the end of
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34 the file and grouping together Tx and Rx machines a bit better.
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35
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36 2000-04-13 Hugo Tyson <hmt@cygnus.co.uk>
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37
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38 * src/if_ebsa285.c: Attribution to Ron Spence, Pacific Softworks
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39 added as a contributor.
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40
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41 2000-04-07 Hugo Tyson <hmt@cygnus.co.uk>
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42
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43 * ecos.db: Re-organize device packages. This is a massive change
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44 involving deleting all the sources for serial and ethernet drivers
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45 from where they used to live in
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46 packages/io/serial/current/src/ARCH/PLATFORM.[ch]
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47 packages/net/drivers/eth/PLATFORM/current/src/...
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48 and reinstating them in
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49 packages/devs/serial/ARCH/PLATFORM/current/src/...
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50 packages/devs/eth/ARCH/PLATFORM/current/src/...
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51
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52 All these new packages are properly defined in ecos.db, and are
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53 all of type "hardware" so that a "target" can grab them.
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54
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55 This directory layout is descriptive of the devices we have right
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56 now, arch and platform are separate levels just to make it easier
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57 to navigate in the filesystem and similar to the HAL structure in
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58 the filesystem.
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59
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60 It is *not* prescriptive of future work; for example, the mythical
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61 common highly-portable 16550 serial driver which works on many
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62 targets would be called "devs/serial/s16550/current", or a serial
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63 device for a particular board (cogent springs to mind) that can
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64 work with different CPUs fitted is "devs/serial/cogent/current".
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65
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66 Changelogs have been preserved and replicated over all the new
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67 packages, so that no history is lost.
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68
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69 The contents of individual source files are unchanged; they build
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70 in just the same emvironment except for a very few cases where the
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71 config file name changed in this movement.
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72
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73 Targets in ecos.db have been redefined to bring in all relevant
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74 hardware packages including net and serial drivers (but the newly
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75 included packages are only active if their desired parent is
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76 available.)
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77
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78 The names of CDL options (and their #defines of course) stay the
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79 same for the serial drivers, for backward compatibility.
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80
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81 * templates/*/current.ect: these have had CYGPKG_IO_SERIAL added
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82 rather than it being in (almost) all target definitions.
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83
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84 2000-03-29 Hugo Tyson <hmt@cygnus.co.uk>
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85
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86 * src/if_ebsa285.c (i82559_recv): Be happy with NULLs in the
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87 SGlist; it means the caller is out of memory so drop the packet on
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88 the floor. Also remove a completely redundant test.
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89
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90 2000-03-06 Hugo Tyson <hmt@cygnus.co.uk>
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91
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92 * src/if_ebsa285.c (i82559_can_send): Update net driver to new
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93 interface style. This is incomplete wrt promiscuous mode, but
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94 that's probably about all.
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95
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96 2000-02-14 Gary Thomas <gthomas@cygnus.co.uk>
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97
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98 * cdl/ebsa285_eth_drivers.cdl: Update CDL to indicate multiple
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99 interface support.
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100
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101 2000-02-14 Hugo Tyson <hmt@cygnus.co.uk>
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102
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103 * src/if_ebsa285.c (pci_init_find_82559s): Tidy comments somewhat
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104 and set debug and stats collecting defines to most friendly
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105 settings.
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106
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107 2000-02-10 Hugo Tyson <hmt@cygnus.co.uk>
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108
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109 * src/if_ebsa285.c (PacketRxReady): Fix bug; current descriptor
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110 was not being write back for the callback to use. Hence asserts
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111 on state of rfd were firing in busy times - that leading rfd had
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112 already been drained.
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113
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114 Also rationalized meaning of DEBUG printy symbols a bit - it's now
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115 chatty during startup/foreground manipulations but not in any
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116 performance related activities ie. rx or tx.
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117
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118 2000-02-09 John Dallaway <jld@cygnus.co.uk>
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119
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120 * cdl/ebsa285_eth_drivers.cdl:
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121
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122 Reparent under CYGPKG_NET_ETH_DRIVERS and tidy display strings.
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123
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124 2000-02-08 Hugo Tyson <hmt@cygnus.co.uk>
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125
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126 * src/if_ebsa285.c: New File.
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127 * cdl/ebsa285_eth_drivers.cdl: New File.
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128
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129 Initial Checkin of EBSA285 Ethernet driver.
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130
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131 It's one monolithic file at present, and should be split up into a
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132 more generic Intel 82559 driver plus platform-specific parts (PCI
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133 et al) plus eCos/Red-Hat-BSD-stack parts.
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134
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135 //===========================================================================
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136 //####COPYRIGHTBEGIN####
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137 //
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138 // -------------------------------------------
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139 // The contents of this file are subject to the Red Hat eCos Public License
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140 // Version 1.1 (the "License"); you may not use this file except in
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141 // compliance with the License. You may obtain a copy of the License at
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142 // http://www.redhat.com/
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143 //
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144 // Software distributed under the License is distributed on an "AS IS"
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145 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
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146 // License for the specific language governing rights and limitations under
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147 // the License.
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148 //
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149 // The Original Code is eCos - Embedded Configurable Operating System,
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150 // released September 30, 1998.
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151 //
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152 // The Initial Developer of the Original Code is Red Hat.
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153 // Portions created by Red Hat are
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154 // Copyright (C) 1998, 1999, 2000 Red Hat, Inc.
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155 // All Rights Reserved.
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156 // -------------------------------------------
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157 //
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158 //####COPYRIGHTEND####
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159 //===========================================================================
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160
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161
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162