1 /*
2 *
3 * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/
4 *
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *
10 * Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 *
13 * Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the
16 * distribution.
17 *
18 * Neither the name of Texas Instruments Incorporated nor the names of
19 * its contributors may be used to endorse or promote products derived
20 * from this software without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
23 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
24 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
25 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
26 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
27 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
28 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
29 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
30 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
31 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
32 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 *
34 */
38 /************************************************************************************
39 * FILE PURPOSE: Boot a binary blob
40 ************************************************************************************
41 * FILE NAME: blob.c
42 *
43 * DESCRIPTION: A binary blob is booted.
44 *
45 * @file blob.c
46 *
47 * @brief
48 * This file reads data from the boot device as a binary blob
49 *
50 ************************************************************************************/
51 #include "types.h"
52 #include "ibl.h"
53 #include "iblloc.h"
54 #include "iblblob.h"
58 /**
59 * @b Description
60 * @n
61 *
62 * A simple read from the boot device is done until one of the following
63 * conditions occurs:
64 * - The complete data block is read
65 * - The read request fails
66 */
68 void iblBootBlob (BOOT_MODULE_FXN_TABLE *bootFxn, Uint32 *entry, void *formatParams)
69 {
70 Int32 dataSize;
71 Uint32 remainSize;
72 Uint32 dummyVal;
73 Uint32 bytesRead = 0;
74 Int32 erVal = 0;
75 Uint8 *datap;
77 iblBinBlob_t *blobParams = (iblBinBlob_t *)formatParams;
79 datap = (Uint8 *)blobParams->startAddress;
80 *entry = 0;
82 for (remainSize = blobParams->sizeBytes; (remainSize > 0) && (erVal == 0); ) {
84 /* If there is any data waiting go ahead and process it */
85 dataSize = (*bootFxn->query)();
87 /* The query function will return a negative value when the stream has
88 * closed */
89 if (dataSize < 0)
90 break;
92 if (dataSize > remainSize)
93 dataSize = remainSize;
95 if (dataSize > 0) {
97 (*bootFxn->read)(datap, dataSize);
98 datap = datap + dataSize;
99 remainSize = remainSize - dataSize;
100 bytesRead = bytesRead + dataSize;
102 } else {
104 /* If there is no data waiting peek for more. On error assume
105 * that the device has completed the transfer. This is valid
106 * since the read includes a timeout. */
107 erVal = (*bootFxn->peek)((Uint8 *)&dummyVal, 1);
109 }
111 }
113 /* Assume that if any data was read the boot was successful.
114 * A check could be added to see if the entry address was
115 * actually written, but this assumes there was no data already
116 * at the entry point */
117 if (bytesRead > 0)
118 *entry = blobParams->branchAddress;
120 }