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author | Minkyu Kang <mk7.kang@samsung.com> | 2010-04-19 10:26:18 +0900 |
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committer | Minkyu Kang <mk7.kang@samsung.com> | 2010-04-19 10:26:18 +0900 |
commit | 83653121d7382fccfe329cb732f77f116341ef1d (patch) | |
tree | 0b1ce6764252af15dfb2614372de98a44a7ec61f /arch/blackfin/include/asm/delay.h | |
parent | 0f1f21a345e02a68ec16f7ab9e7dc687f9276089 (diff) | |
parent | 07739bcef5da07cc4a4edef8b91014ccc332eda3 (diff) | |
download | u-boot-imx-83653121d7382fccfe329cb732f77f116341ef1d.zip u-boot-imx-83653121d7382fccfe329cb732f77f116341ef1d.tar.gz u-boot-imx-83653121d7382fccfe329cb732f77f116341ef1d.tar.bz2 |
Merge branch 'master' of git://git.denx.de/u-boot-arm
Conflicts:
cpu/arm1176/cpu.c
cpu/arm1176/start.S
cpu/arm_cortexa8/s5pc1xx/Makefile
cpu/arm_cortexa8/s5pc1xx/clock.c
drivers/serial/serial_s5p.c
include/asm-arm/arch-s5pc1xx/clk.h
include/asm-arm/arch-s5pc1xx/gpio.h
include/asm-arm/arch-s5pc1xx/uart.h
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
Diffstat (limited to 'arch/blackfin/include/asm/delay.h')
-rw-r--r-- | arch/blackfin/include/asm/delay.h | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/arch/blackfin/include/asm/delay.h b/arch/blackfin/include/asm/delay.h new file mode 100644 index 0000000..3af6ad3 --- /dev/null +++ b/arch/blackfin/include/asm/delay.h @@ -0,0 +1,55 @@ +/* + * U-boot - delay.h Routines for introducing delays + * + * Copyright (c) 2005-2007 Analog Devices Inc. + * + * 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 + */ + +#ifndef _BLACKFIN_DELAY_H +#define _BLACKFIN_DELAY_H + +/* + * Changes made by akbar.hussain@Lineo.com, for BLACKFIN + * Copyright (C) 1994 Hamish Macdonald + * + * Delay routines, using a pre-computed "loops_per_second" value. + */ + +extern __inline__ void __delay(unsigned long loops) +{ + __asm__ __volatile__("1:\t%0 += -1;\n\t" + "cc = %0 == 0;\n\t" + "if ! cc jump 1b;\n":"=d"(loops) + :"0"(loops)); +} + +/* + * Use only for very small delays ( < 1 msec). Should probably use a + * lookup table, really, as the multiplications take much too long with + * short delays. This is a "reasonable" implementation, though (and the + * first constant multiplications gets optimized away if the delay is + * a constant) + */ +extern __inline__ void __udelay(unsigned long usecs) +{ + __delay(usecs); +} + +#endif |