2 * U-boot - bf533_string.c Contains library routines.
4 * Copyright (c) 2005 blackfin.uclinux.org
6 * (C) Copyright 2000-2004
7 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
9 * See file CREDITS for list of people who contributed to this
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License as
14 * published by the Free Software Foundation; either version 2 of
15 * the License, or (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
29 #include <asm/setup.h>
31 #include <asm/cpu/defBF533.h>
33 void *dma_memcpy(void *,const void *,size_t);
35 char *strcpy(char *dest, const char *src)
41 ("1:\t%2 = B [%1++] (Z);\n\t"
44 "if cc jump 1b (bp);\n":"=a"(dest), "=a"(src), "=d"(temp)
45 :"0"(dest), "1"(src), "2"(temp):"memory");
50 char *strncpy(char *dest, const char *src, size_t n)
59 ("1:\t%3 = B [%1++] (Z);\n\t"
62 "if ! cc jump 2f;\n\t"
65 "if ! cc jump 1b (bp);\n"
66 "2:\n":"=a"(dest), "=a"(src), "=da"(n), "=d"(temp)
67 :"0"(dest), "1"(src), "2"(n), "3"(temp)
73 int strcmp(const char *cs, const char *ct)
78 ("1:\t%2 = B[%0++] (Z);\n\t" /* get *cs */
79 "%3 = B[%1++] (Z);\n\t" /* get *ct */
80 "CC = %2 == %3;\n\t" /* compare a byte */
81 "if ! cc jump 2f;\n\t" /* not equal, break out */
82 "CC = %2;\n\t" /* at end of cs? */
83 "if cc jump 1b (bp);\n\t" /* no, keep going */
84 "jump.s 3f;\n" /* strings are equal */
85 "2:\t%2 = %2 - %3;\n" /* *cs - *ct */
86 "3:\n": "=a"(cs), "=a"(ct), "=d"(__res1),
93 int strncmp(const char *cs, const char *ct, size_t count)
101 ("1:\t%3 = B[%0++] (Z);\n\t" /* get *cs */
102 "%4 = B[%1++] (Z);\n\t" /* get *ct */
103 "CC = %3 == %4;\n\t" /* compare a byte */
104 "if ! cc jump 3f;\n\t" /* not equal, break out */
105 "CC = %3;\n\t" /* at end of cs? */
106 "if ! cc jump 4f;\n\t" /* yes, all done */
107 "%2 += -1;\n\t" /* no, adjust count */
108 "CC = %2 == 0;\n\t" "if ! cc jump 1b;\n" /* more to do, keep going */
109 "2:\t%3 = 0;\n\t" /* strings are equal */
110 "jump.s 4f;\n" "3:\t%3 = %3 - %4;\n" /* *cs - *ct */
111 "4:": "=a"(cs), "=a"(ct), "=da"(count), "=d"(__res1),
113 : "0"(cs), "1"(ct), "2"(count));
119 * memcpy - Copy one area of memory to another
120 * @dest: Where to copy to
121 * @src: Where to copy from
122 * @count: The size of the area.
124 * You should not use this function to access IO space, use memcpy_toio()
125 * or memcpy_fromio() instead.
127 void * memcpy(void * dest,const void *src,size_t count)
129 char *tmp = (char *) dest, *s = (char *) src;
131 /* Turn off the cache, if destination in the L1 memory */
132 if ( (tmp >= (char *)L1_ISRAM) && (tmp < (char *)L1_ISRAM_END)
133 || (tmp >= (char *)DATA_BANKA_SRAM) && (tmp < DATA_BANKA_SRAM_END)
134 || (tmp >= (char *)DATA_BANKB_SRAM) && (tmp < DATA_BANKB_SRAM_END) ){
136 blackfin_icache_flush_range(src, src+count);
140 blackfin_dcache_flush_range(src, src+count);
143 dma_memcpy(dest,src,count);
151 void *dma_memcpy(void * dest,const void *src,size_t count)
154 *pMDMA_D0_IRQ_STATUS = DMA_DONE | DMA_ERR;
156 /* Copy sram functions from sdram to sram */
157 /* Setup destination start address */
158 *pMDMA_D0_START_ADDR = (volatile void **)dest;
159 /* Setup destination xcount */
160 *pMDMA_D0_X_COUNT = count ;
161 /* Setup destination xmodify */
162 *pMDMA_D0_X_MODIFY = 1;
164 /* Setup Source start address */
165 *pMDMA_S0_START_ADDR = (volatile void **)src;
166 /* Setup Source xcount */
167 *pMDMA_S0_X_COUNT = count;
168 /* Setup Source xmodify */
169 *pMDMA_S0_X_MODIFY = 1;
171 /* Enable source DMA */
172 *pMDMA_S0_CONFIG = (DMAEN);
175 *pMDMA_D0_CONFIG = ( WNR | DMAEN);
177 while(*pMDMA_D0_IRQ_STATUS & DMA_RUN){
178 *pMDMA_D0_IRQ_STATUS |= (DMA_DONE | DMA_ERR);
180 *pMDMA_D0_IRQ_STATUS |= (DMA_DONE | DMA_ERR);