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-rw-r--r--lib_blackfin/bf533_string.c185
1 files changed, 185 insertions, 0 deletions
diff --git a/lib_blackfin/bf533_string.c b/lib_blackfin/bf533_string.c
new file mode 100644
index 0000000..cfa515a
--- /dev/null
+++ b/lib_blackfin/bf533_string.c
@@ -0,0 +1,185 @@
+/*
+ * U-boot - bf533_string.c Contains library routines.
+ *
+ * Copyright (c) 2005 blackfin.uclinux.org
+ *
+ * (C) Copyright 2000-2004
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <asm/setup.h>
+#include <asm/page.h>
+#include <asm/cpu/defBF533.h>
+
+void *dma_memcpy(void *,const void *,size_t);
+
+char *strcpy(char *dest, const char *src)
+{
+ char *xdest = dest;
+ char temp = 0;
+
+ __asm__ __volatile__
+ ("1:\t%2 = B [%1++] (Z);\n\t"
+ "B [%0++] = %2;\n\t"
+ "CC = %2;\n\t"
+ "if cc jump 1b (bp);\n":"=a"(dest), "=a"(src), "=d"(temp)
+ :"0"(dest), "1"(src), "2"(temp):"memory");
+
+ return xdest;
+}
+
+char *strncpy(char *dest, const char *src, size_t n)
+{
+ char *xdest = dest;
+ char temp = 0;
+
+ if (n == 0)
+ return xdest;
+
+ __asm__ __volatile__
+ ("1:\t%3 = B [%1++] (Z);\n\t"
+ "B [%0++] = %3;\n\t"
+ "CC = %3;\n\t"
+ "if ! cc jump 2f;\n\t"
+ "%2 += -1;\n\t"
+ "CC = %2 == 0;\n\t"
+ "if ! cc jump 1b (bp);\n"
+ "2:\n":"=a"(dest), "=a"(src), "=da"(n), "=d"(temp)
+ :"0"(dest), "1"(src), "2"(n), "3"(temp)
+ :"memory");
+
+ return xdest;
+}
+
+int strcmp(const char *cs, const char *ct)
+{
+ char __res1, __res2;
+
+ __asm__
+ ("1:\t%2 = B[%0++] (Z);\n\t" /* get *cs */
+ "%3 = B[%1++] (Z);\n\t" /* get *ct */
+ "CC = %2 == %3;\n\t" /* compare a byte */
+ "if ! cc jump 2f;\n\t" /* not equal, break out */
+ "CC = %2;\n\t" /* at end of cs? */
+ "if cc jump 1b (bp);\n\t" /* no, keep going */
+ "jump.s 3f;\n" /* strings are equal */
+ "2:\t%2 = %2 - %3;\n" /* *cs - *ct */
+ "3:\n": "=a"(cs), "=a"(ct), "=d"(__res1),
+ "=d"(__res2)
+ : "0"(cs), "1"(ct));
+
+ return __res1;
+}
+
+int strncmp(const char *cs, const char *ct, size_t count)
+{
+ char __res1, __res2;
+
+ if (!count)
+ return 0;
+
+ __asm__
+ ("1:\t%3 = B[%0++] (Z);\n\t" /* get *cs */
+ "%4 = B[%1++] (Z);\n\t" /* get *ct */
+ "CC = %3 == %4;\n\t" /* compare a byte */
+ "if ! cc jump 3f;\n\t" /* not equal, break out */
+ "CC = %3;\n\t" /* at end of cs? */
+ "if ! cc jump 4f;\n\t" /* yes, all done */
+ "%2 += -1;\n\t" /* no, adjust count */
+ "CC = %2 == 0;\n\t" "if ! cc jump 1b;\n" /* more to do, keep going */
+ "2:\t%3 = 0;\n\t" /* strings are equal */
+ "jump.s 4f;\n" "3:\t%3 = %3 - %4;\n" /* *cs - *ct */
+ "4:": "=a"(cs), "=a"(ct), "=da"(count), "=d"(__res1),
+ "=d"(__res2)
+ : "0"(cs), "1"(ct), "2"(count));
+
+ return __res1;
+}
+
+/*
+ * memcpy - Copy one area of memory to another
+ * @dest: Where to copy to
+ * @src: Where to copy from
+ * @count: The size of the area.
+ *
+ * You should not use this function to access IO space, use memcpy_toio()
+ * or memcpy_fromio() instead.
+ */
+void * memcpy(void * dest,const void *src,size_t count)
+{
+ char *tmp = (char *) dest, *s = (char *) src;
+
+/* Turn off the cache, if destination in the L1 memory */
+ if ( (tmp >= (char *)L1_ISRAM) && (tmp < (char *)L1_ISRAM_END)
+ || (tmp >= (char *)DATA_BANKA_SRAM) && (tmp < DATA_BANKA_SRAM_END)
+ || (tmp >= (char *)DATA_BANKB_SRAM) && (tmp < DATA_BANKB_SRAM_END) ){
+ if(icache_status()){
+ blackfin_icache_flush_range(src, src+count);
+ icache_disable();
+ }
+ if(dcache_status()){
+ blackfin_dcache_flush_range(src, src+count);
+ dcache_disable();
+ }
+ dma_memcpy(dest,src,count);
+ }else{
+ while(count--)
+ *tmp++ = *s++;
+ }
+ return dest;
+}
+
+void *dma_memcpy(void * dest,const void *src,size_t count)
+{
+
+ *pMDMA_D0_IRQ_STATUS = DMA_DONE | DMA_ERR;
+
+ /* Copy sram functions from sdram to sram */
+ /* Setup destination start address */
+ *pMDMA_D0_START_ADDR = (volatile void **)dest;
+ /* Setup destination xcount */
+ *pMDMA_D0_X_COUNT = count ;
+ /* Setup destination xmodify */
+ *pMDMA_D0_X_MODIFY = 1;
+
+ /* Setup Source start address */
+ *pMDMA_S0_START_ADDR = (volatile void **)src;
+ /* Setup Source xcount */
+ *pMDMA_S0_X_COUNT = count;
+ /* Setup Source xmodify */
+ *pMDMA_S0_X_MODIFY = 1;
+
+ /* Enable source DMA */
+ *pMDMA_S0_CONFIG = (DMAEN);
+ asm("ssync;");
+
+ *pMDMA_D0_CONFIG = ( WNR | DMAEN);
+
+ while(*pMDMA_D0_IRQ_STATUS & DMA_RUN){
+ *pMDMA_D0_IRQ_STATUS |= (DMA_DONE | DMA_ERR);
+ }
+ *pMDMA_D0_IRQ_STATUS |= (DMA_DONE | DMA_ERR);
+
+ dest += count;
+ src += count;
+ return dest;
+}