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>
32 #include <asm/blackfin.h>
35 extern void blackfin_icache_flush_range(const void *, const void *);
36 extern void blackfin_dcache_flush_range(const void *, const void *);
37 extern void *memcpy_ASM(void *dest, const void *src, size_t count);
39 void *dma_memcpy(void *, const void *, size_t);
41 char *strcpy(char *dest, const char *src)
47 ("1:\t%2 = B [%1++] (Z);\n\t"
50 "if cc jump 1b (bp);\n":"=a"(dest), "=a"(src), "=d"(temp)
51 :"0"(dest), "1"(src), "2"(temp):"memory");
56 char *strncpy(char *dest, const char *src, size_t n)
65 ("1:\t%3 = B [%1++] (Z);\n\t"
68 "if ! cc jump 2f;\n\t"
71 "if ! cc jump 1b (bp);\n"
72 "2:\n":"=a"(dest), "=a"(src), "=da"(n), "=d"(temp)
73 :"0"(dest), "1"(src), "2"(n), "3"(temp)
79 int strcmp(const char *cs, const char *ct)
83 __asm__("1:\t%2 = B[%0++] (Z);\n\t" /* get *cs */
84 "%3 = B[%1++] (Z);\n\t" /* get *ct */
85 "CC = %2 == %3;\n\t" /* compare a byte */
86 "if ! cc jump 2f;\n\t" /* not equal, break out */
87 "CC = %2;\n\t" /* at end of cs? */
88 "if cc jump 1b (bp);\n\t" /* no, keep going */
89 "jump.s 3f;\n" /* strings are equal */
90 "2:\t%2 = %2 - %3;\n" /* *cs - *ct */
91 "3:\n": "=a"(cs), "=a"(ct), "=d"(__res1), "=d"(__res2)
97 int strncmp(const char *cs, const char *ct, size_t count)
104 __asm__("1:\t%3 = B[%0++] (Z);\n\t" /* get *cs */
105 "%4 = B[%1++] (Z);\n\t" /* get *ct */
106 "CC = %3 == %4;\n\t" /* compare a byte */
107 "if ! cc jump 3f;\n\t" /* not equal, break out */
108 "CC = %3;\n\t" /* at end of cs? */
109 "if ! cc jump 4f;\n\t" /* yes, all done */
110 "%2 += -1;\n\t" /* no, adjust count */
111 "CC = %2 == 0;\n\t" "if ! cc jump 1b;\n" /* more to do, keep going */
112 "2:\t%3 = 0;\n\t" /* strings are equal */
113 "jump.s 4f;\n" "3:\t%3 = %3 - %4;\n" /* *cs - *ct */
114 "4:": "=a"(cs), "=a"(ct), "=da"(count), "=d"(__res1),
116 : "0"(cs), "1"(ct), "2"(count));
122 * memcpy - Copy one area of memory to another
123 * @dest: Where to copy to
124 * @src: Where to copy from
125 * @count: The size of the area.
127 * You should not use this function to access IO space, use memcpy_toio()
128 * or memcpy_fromio() instead.
130 void *memcpy(void *dest, const void *src, size_t count)
132 char *tmp = (char *)dest, *s = (char *)src;
134 /* L1_ISRAM can only be accessed via dma */
135 if ((tmp >= (char *)L1_ISRAM) && (tmp < (char *)L1_ISRAM_END)) {
136 /* L1 is the destination */
137 dma_memcpy(dest, src, count);
139 if (icache_status()) {
140 blackfin_icache_flush_range(src, src + count);
142 } else if ((s >= (char *)L1_ISRAM) && (s < (char *)L1_ISRAM_END)) {
143 /* L1 is the source */
144 dma_memcpy(dest, src, count);
146 if (icache_status()) {
147 blackfin_icache_flush_range(dest, dest + count);
149 if (dcache_status()) {
150 blackfin_dcache_flush_range(dest, dest + count);
153 memcpy_ASM(dest, src, count);
158 void *dma_memcpy(void *dest, const void *src, size_t count)
160 *pMDMA_D0_IRQ_STATUS = DMA_DONE | DMA_ERR;
162 /* Copy sram functions from sdram to sram */
163 /* Setup destination start address */
164 *pMDMA_D0_START_ADDR = (volatile void **)dest;
165 /* Setup destination xcount */
166 *pMDMA_D0_X_COUNT = count;
167 /* Setup destination xmodify */
168 *pMDMA_D0_X_MODIFY = 1;
170 /* Setup Source start address */
171 *pMDMA_S0_START_ADDR = (volatile void **)src;
172 /* Setup Source xcount */
173 *pMDMA_S0_X_COUNT = count;
174 /* Setup Source xmodify */
175 *pMDMA_S0_X_MODIFY = 1;
177 /* Enable source DMA */
178 *pMDMA_S0_CONFIG = (DMAEN);
181 *pMDMA_D0_CONFIG = (WNR | DMAEN);
183 while (*pMDMA_D0_IRQ_STATUS & DMA_RUN) {
184 *pMDMA_D0_IRQ_STATUS |= (DMA_DONE | DMA_ERR);
186 *pMDMA_D0_IRQ_STATUS |= (DMA_DONE | DMA_ERR);