/* * U-boot - bf533_string.c Contains library routines. * * Copyright (c) 2005-2007 Analog Devices Inc. * * (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., 51 Franklin St, Fifth Floor, Boston, * MA 02110-1301 USA */ #include <common.h> #include <asm/setup.h> #include <config.h> #include <asm/blackfin.h> #include <asm/io.h> #include "cache.h" 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; } static 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); sync(); *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; } /* * 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. */ extern void *memcpy_ASM(void *dest, const void *src, size_t count); void *memcpy(void *dest, const void *src, size_t count) { char *tmp = (char *) dest, *s = (char *) src; if (dcache_status()) { blackfin_dcache_flush_range(src, src+count); } /* L1_ISRAM can only be accessed via dma */ if ((tmp >= (char *)L1_ISRAM) && (tmp < (char *)L1_ISRAM_END)) { /* L1 is the destination */ dma_memcpy(dest,src,count); } else if ((s >= (char *)L1_ISRAM) && (s < (char *)L1_ISRAM_END)) { /* L1 is the source */ dma_memcpy(dest,src,count); if (icache_status()) { blackfin_icache_flush_range(dest, dest+count); } if (dcache_status()) { blackfin_dcache_invalidate_range(dest, dest+count); } } else { memcpy_ASM(dest,src,count); } return dest; }