X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=qemu%2Froms%2Fu-boot%2Farch%2Fblackfin%2Finclude%2Fasm%2Fdelay.h;fp=qemu%2Froms%2Fu-boot%2Farch%2Fblackfin%2Finclude%2Fasm%2Fdelay.h;h=97401a7ce21537fd2084f1ad7d29d129b7859414;hb=e44e3482bdb4d0ebde2d8b41830ac2cdb07948fb;hp=0000000000000000000000000000000000000000;hpb=9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00;p=kvmfornfv.git diff --git a/qemu/roms/u-boot/arch/blackfin/include/asm/delay.h b/qemu/roms/u-boot/arch/blackfin/include/asm/delay.h new file mode 100644 index 000000000..97401a7ce --- /dev/null +++ b/qemu/roms/u-boot/arch/blackfin/include/asm/delay.h @@ -0,0 +1,39 @@ +/* + * U-boot - delay.h Routines for introducing delays + * + * Copyright (c) 2005-2007 Analog Devices Inc. + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#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