diff options
Diffstat (limited to 'lib_blackfin/string.c')
| -rw-r--r-- | lib_blackfin/string.c | 274 |
1 files changed, 0 insertions, 274 deletions
diff --git a/lib_blackfin/string.c b/lib_blackfin/string.c deleted file mode 100644 index e344d3b..0000000 --- a/lib_blackfin/string.c +++ /dev/null @@ -1,274 +0,0 @@ -/* - * U-boot - string.c Contains library routines. - * - * Copyright (c) 2005-2008 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 <config.h> -#include <asm/blackfin.h> -#include <asm/io.h> -#include <asm/mach-common/bits/dma.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; -} - -#ifdef bfin_write_MDMA1_D0_IRQ_STATUS -# define bfin_write_MDMA_D0_IRQ_STATUS bfin_write_MDMA1_D0_IRQ_STATUS -# define bfin_write_MDMA_D0_START_ADDR bfin_write_MDMA1_D0_START_ADDR -# define bfin_write_MDMA_D0_X_COUNT bfin_write_MDMA1_D0_X_COUNT -# define bfin_write_MDMA_D0_X_MODIFY bfin_write_MDMA1_D0_X_MODIFY -# define bfin_write_MDMA_D0_CONFIG bfin_write_MDMA1_D0_CONFIG -# define bfin_write_MDMA_S0_START_ADDR bfin_write_MDMA1_S0_START_ADDR -# define bfin_write_MDMA_S0_X_COUNT bfin_write_MDMA1_S0_X_COUNT -# define bfin_write_MDMA_S0_X_MODIFY bfin_write_MDMA1_S0_X_MODIFY -# define bfin_write_MDMA_S0_CONFIG bfin_write_MDMA1_S0_CONFIG -# define bfin_write_MDMA_D0_IRQ_STATUS bfin_write_MDMA1_D0_IRQ_STATUS -# define bfin_read_MDMA_D0_IRQ_STATUS bfin_read_MDMA1_D0_IRQ_STATUS -#endif -/* This version misbehaves for count values of 0 and 2^16+. - * Perhaps we should detect that ? Nowhere do we actually - * use dma memcpy for those types of lengths though ... - */ -void dma_memcpy_nocache(void *dst, const void *src, size_t count) -{ - uint16_t wdsize, mod; - - /* Disable DMA in case it's still running (older u-boot's did not - * always turn them off). Do it before the if statement below so - * we can be cheap and not do a SSYNC() due to the forced abort. - */ - bfin_write_MDMA_D0_CONFIG(0); - bfin_write_MDMA_S0_CONFIG(0); - bfin_write_MDMA_D0_IRQ_STATUS(DMA_RUN | DMA_DONE | DMA_ERR); - - /* Scratchpad cannot be a DMA source or destination */ - if (((unsigned long)src >= L1_SRAM_SCRATCH && - (unsigned long)src < L1_SRAM_SCRATCH_END) || - ((unsigned long)dst >= L1_SRAM_SCRATCH && - (unsigned long)dst < L1_SRAM_SCRATCH_END)) - hang(); - - if (((unsigned long)dst | (unsigned long)src | count) & 0x1) { - wdsize = WDSIZE_8; - mod = 1; - } else if (((unsigned long)dst | (unsigned long)src | count) & 0x2) { - wdsize = WDSIZE_16; - count >>= 1; - mod = 2; - } else { - wdsize = WDSIZE_32; - count >>= 2; - mod = 4; - } - - /* Copy sram functions from sdram to sram */ - /* Setup destination start address */ - bfin_write_MDMA_D0_START_ADDR(dst); - /* Setup destination xcount */ - bfin_write_MDMA_D0_X_COUNT(count); - /* Setup destination xmodify */ - bfin_write_MDMA_D0_X_MODIFY(mod); - - /* Setup Source start address */ - bfin_write_MDMA_S0_START_ADDR(src); - /* Setup Source xcount */ - bfin_write_MDMA_S0_X_COUNT(count); - /* Setup Source xmodify */ - bfin_write_MDMA_S0_X_MODIFY(mod); - - /* Enable source DMA */ - bfin_write_MDMA_S0_CONFIG(wdsize | DMAEN); - bfin_write_MDMA_D0_CONFIG(wdsize | DMAEN | WNR | DI_EN); - SSYNC(); - - while (!(bfin_read_MDMA_D0_IRQ_STATUS() & DMA_DONE)) - continue; - - bfin_write_MDMA_D0_IRQ_STATUS(DMA_RUN | DMA_DONE | DMA_ERR); - bfin_write_MDMA_D0_CONFIG(0); - bfin_write_MDMA_S0_CONFIG(0); -} -/* We should do a dcache invalidate on the destination after the dma, but since - * we lack such hardware capability, we'll flush/invalidate the destination - * before the dma and bank on the idea that u-boot is single threaded. - */ -void *dma_memcpy(void *dst, const void *src, size_t count) -{ - if (dcache_status()) { - blackfin_dcache_flush_range(src, src + count); - blackfin_dcache_flush_invalidate_range(dst, dst + count); - } - - dma_memcpy_nocache(dst, src, count); - - if (icache_status()) - blackfin_icache_flush_range(dst, dst + count); - - return dst; -} - -/* - * memcpy - Copy one area of memory to another - * @dest: Where to copy to - * @src: Where to copy from - * @count: The size of the area. - * - * We need to have this wrapper in memcpy() as common code may call memcpy() - * to load up L1 regions. Consider loading an ELF which has sections with - * LMA's pointing to L1. The common code ELF loader will simply use memcpy() - * to move the ELF's sections into the right place. We need to catch that - * here and redirect to dma_memcpy(). - */ -extern void *memcpy_ASM(void *dst, const void *src, size_t count); -void *memcpy(void *dst, const void *src, size_t count) -{ - if (!count) - return dst; - -#ifdef CONFIG_CMD_KGDB - if (src >= (void *)SYSMMR_BASE) { - if (count == 2 && (unsigned long)src % 2 == 0) { - u16 mmr = bfin_read16(src); - memcpy(dst, &mmr, sizeof(mmr)); - return dst; - } - if (count == 4 && (unsigned long)src % 4 == 0) { - u32 mmr = bfin_read32(src); - memcpy(dst, &mmr, sizeof(mmr)); - return dst; - } - /* Failed for some reason */ - memset(dst, 0xad, count); - return dst; - } - if (dst >= (void *)SYSMMR_BASE) { - if (count == 2 && (unsigned long)dst % 2 == 0) { - u16 mmr; - memcpy(&mmr, src, sizeof(mmr)); - bfin_write16(dst, mmr); - return dst; - } - if (count == 4 && (unsigned long)dst % 4 == 0) { - u32 mmr; - memcpy(&mmr, src, sizeof(mmr)); - bfin_write32(dst, mmr); - return dst; - } - /* Failed for some reason */ - memset(dst, 0xad, count); - return dst; - } -#endif - - /* if L1 is the source or dst, use DMA */ - if (addr_bfin_on_chip_mem(dst) || addr_bfin_on_chip_mem(src)) - return dma_memcpy(dst, src, count); - else - /* No L1 is involved, so just call regular memcpy */ - return memcpy_ASM(dst, src, count); -} |