source: SVN/cambria/redboot/packages/devs/flash/intel/strata/current/src/flash_query.c @ 1

Last change on this file since 1 was 1, checked in by Tim Harvey, 2 years ago

restored latest version of files from server backup

Signed-off-by: Tim Harvey <tharvey@…>

File size: 3.7 KB
Line 
1//==========================================================================
2//
3//      flash_query.c
4//
5//      Flash programming - query device
6//
7//==========================================================================
8//####ECOSGPLCOPYRIGHTBEGIN####
9// -------------------------------------------
10// This file is part of eCos, the Embedded Configurable Operating System.
11// Copyright (C) 1998, 1999, 2000, 2001, 2002, 2004 Red Hat, Inc.
12//
13// eCos is free software; you can redistribute it and/or modify it under
14// the terms of the GNU General Public License as published by the Free
15// Software Foundation; either version 2 or (at your option) any later version.
16//
17// eCos is distributed in the hope that it will be useful, but WITHOUT ANY
18// WARRANTY; without even the implied warranty of MERCHANTABILITY or
19// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
20// for more details.
21//
22// You should have received a copy of the GNU General Public License along
23// with eCos; if not, write to the Free Software Foundation, Inc.,
24// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
25//
26// As a special exception, if other files instantiate templates or use macros
27// or inline functions from this file, or you compile this file and link it
28// with other works to produce a work based on this file, this file does not
29// by itself cause the resulting work to be covered by the GNU General Public
30// License. However the source code for this file must still be made available
31// in accordance with section (3) of the GNU General Public License.
32//
33// This exception does not invalidate any other reasons why a work based on
34// this file might be covered by the GNU General Public License.
35//
36// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
37// at http://sources.redhat.com/ecos/ecos-license/
38// -------------------------------------------
39//####ECOSGPLCOPYRIGHTEND####
40//==========================================================================
41//#####DESCRIPTIONBEGIN####
42//
43// Author(s):    gthomas, hmt
44// Contributors: gthomas
45// Date:         2001-02-14
46// Purpose:     
47// Description: 
48//             
49//####DESCRIPTIONEND####
50//
51//==========================================================================
52
53#include "strata.h"
54
55#include <pkgconf/hal.h>
56#include <cyg/hal/hal_arch.h>
57#include CYGHWR_MEMORY_LAYOUT_H
58
59// Platforms may define this for special handling when accessing the query data.
60#ifndef CYGHWR_FLASH_READ_QUERY
61#define CYGHWR_FLASH_READ_QUERY(a) (*(a))
62#endif
63
64#define CNT 20*1000*10  // Approx 20ms
65
66int
67intel_flash_query(unsigned char *data)  __attribute__ ((section (".2ram.flash_query")));
68int
69intel_flash_query(unsigned char *data)
70{
71    volatile flash_t *ROM;
72    int i, cnt;
73
74    // Get base address and map addresses to virtual addresses
75    ROM = FLASH_P2V( CYGNUM_FLASH_BASE );
76#ifdef CYGOPT_FLASH_IS_BOOTBLOCK
77    // BootBlock flash does not support full Read_Query - we have do a
78    // table oriented thing above, after getting just two bytes of results:
79    ROM[0] = FLASH_Read_ID;
80    i = 2;
81#else
82    // StrataFlash supports the full Read_Query op:
83    ROM[0] = FLASH_Read_Query;
84    i = sizeof(struct FLASH_query);
85#endif // Not CYGOPT_FLASH_IS_BOOTBLOCK
86
87    for (cnt = CNT;  cnt > 0;  cnt--) ;
88    for ( /* i */;  i > 0;  i--, ++ROM) {
89        // It is very deliberate that data is chars NOT flash_t:
90        // The info comes out in bytes regardless of device.
91        *data++ = (unsigned char) CYGHWR_FLASH_READ_QUERY(ROM);
92#ifndef CYGOPT_FLASH_IS_BOOTBLOCK
93# if  8 == CYGNUM_FLASH_WIDTH
94        // strata flash with 'byte-enable' contains the configuration data
95        // at even addresses
96        ++ROM;
97# endif
98#endif
99    }
100    ROM[0] = FLASH_Reset;
101
102    return 0;
103}
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