4 * This file is part of BeRTOS.
6 * Bertos is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 * As a special exception, you may use this file as part of a free software
21 * library without restriction. Specifically, if other files instantiate
22 * templates or use macros or inline functions from this file, or you compile
23 * this file and link it with other files to produce an executable, this
24 * file does not by itself cause the resulting executable to be covered by
25 * the GNU General Public License. This exception does not however
26 * invalidate any other reasons why the executable file might be covered by
27 * the GNU General Public License.
29 * Copyright 2010 Develer S.r.l. (http://www.develer.com/)
33 * \author Francesco Sacchi <batt@develer.com>
35 * \brief KBlock interface
39 #include "kblock_ram.h"
43 static int kblockram_load(KBlock *b, block_idx_t index)
45 KBlockRam *r = KBLOCKRAM_CAST(b);
46 memcpy(r->b.priv.buf, r->membuf + index * r->b.blk_size, r->b.blk_size);
50 static int kblockram_store(struct KBlock *b, block_idx_t index)
52 KBlockRam *r = KBLOCKRAM_CAST(b);
53 memcpy(r->membuf + index * r->b.blk_size, r->b.priv.buf, r->b.blk_size);
57 static size_t kblockram_readBuf(struct KBlock *b, void *buf, size_t offset, size_t size)
59 KBlockRam *r = KBLOCKRAM_CAST(b);
60 memcpy(buf, (uint8_t *)r->b.priv.buf + offset, size);
64 static size_t kblockram_readDirect(struct KBlock *b, block_idx_t index, void *buf, size_t offset, size_t size)
66 KBlockRam *r = KBLOCKRAM_CAST(b);
67 memcpy(buf, r->membuf + index * r->b.blk_size + offset, size);
71 static size_t kblockram_writeBuf(struct KBlock *b, const void *buf, size_t offset, size_t size)
73 KBlockRam *r = KBLOCKRAM_CAST(b);
74 memcpy((uint8_t *)r->b.priv.buf + offset, buf, size);
78 static int kblockram_writeBlock(struct KBlock *b, block_idx_t index, const void *buf)
80 KBlockRam *r = KBLOCKRAM_CAST(b);
82 ASSERT(index < b->blk_cnt);
84 memcpy(r->membuf + index * r->b.blk_size, buf, r->b.blk_size);
88 static int kblockram_readBlock(struct KBlock *b, block_idx_t index, void *buf)
90 KBlockRam *r = KBLOCKRAM_CAST(b);
92 ASSERT(index < b->blk_cnt);
94 memcpy(buf, r->membuf + index * r->b.blk_size, r->b.blk_size);
98 static int kblockram_dummy(UNUSED_ARG(struct KBlock *,b))
103 static const KBlockVTable kblockram_hwbuffered_vt =
105 .readDirect = kblockram_readDirect,
106 .readBuf = kblockram_readBuf,
107 .writeBuf = kblockram_writeBuf,
108 .load = kblockram_load,
109 .store = kblockram_store,
111 .readBlock = kblock_swReadBlock,
112 .writeBlock = kblock_swWriteBlock,
114 .error = kblockram_dummy,
115 .clearerr = kblockram_dummy,
116 .close = kblockram_dummy,
120 static const KBlockVTable kblockram_swbuffered_vt =
122 .readDirect = kblock_swReadDirect,
123 .readBuf = kblock_swReadBuf,
124 .writeBuf = kblock_swWriteBuf,
125 .load = kblock_swLoad,
126 .store = kblock_swStore,
128 .readBlock = kblockram_readBlock,
129 .writeBlock = kblockram_writeBlock,
131 .error = kblockram_dummy,
132 .clearerr = kblockram_dummy,
133 .close = kblockram_dummy,
136 static const KBlockVTable kblockram_unbuffered_vt =
138 .readBlock = kblockram_readBlock,
139 .writeBlock = kblockram_writeBlock,
141 .error = kblockram_dummy,
142 .clearerr = kblockram_dummy,
143 .close = kblockram_dummy,
146 void kblockram_init(KBlockRam *ram, void *buf, size_t size, size_t block_size, bool buffered, bool hwbuffered)
152 memset(ram, 0, sizeof(*ram));
154 DB(ram->b.priv.type = KBT_KBLOCKRAM);
155 ram->b.blk_size = block_size;
159 ram->b.priv.flags |= KB_BUFFERED;
160 ram->b.blk_cnt = (size / block_size) - 1;
161 ram->b.priv.buf = buf;
162 // First page used as page buffer
163 ram->membuf = (uint8_t *)buf + block_size;
166 ram->b.priv.vt = &kblockram_hwbuffered_vt;
168 ram->b.priv.vt = &kblockram_swbuffered_vt;
170 kblockram_load(&ram->b, 0);
174 ram->b.blk_cnt = (size / block_size);
175 ram->membuf = (uint8_t *)buf;
176 ram->b.priv.vt = &kblockram_unbuffered_vt;