diff options
Diffstat (limited to 'arch/m32r/lib/delay.c')
| -rw-r--r-- | arch/m32r/lib/delay.c | 130 |
1 files changed, 0 insertions, 130 deletions
diff --git a/arch/m32r/lib/delay.c b/arch/m32r/lib/delay.c deleted file mode 100644 index ae1fe90892f9..000000000000 --- a/arch/m32r/lib/delay.c +++ /dev/null @@ -1,130 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * linux/arch/m32r/lib/delay.c - * - * Copyright (c) 2002 Hitoshi Yamamoto, Hirokazu Takata - * Copyright (c) 2004 Hirokazu Takata - */ - -#include <linux/param.h> -#include <linux/module.h> -#ifdef CONFIG_SMP -#include <linux/sched.h> -#include <asm/current.h> -#include <asm/smp.h> -#endif /* CONFIG_SMP */ -#include <asm/processor.h> - -void __delay(unsigned long loops) -{ -#ifdef CONFIG_ISA_DUAL_ISSUE - __asm__ __volatile__ ( - "beqz %0, 2f \n\t" - "addi %0, #-1 \n\t" - - " .fillinsn \n\t" - "1: \n\t" - "cmpz %0 || addi %0, #-1 \n\t" - "bc 2f || cmpz %0 \n\t" - "bc 2f || addi %0, #-1 \n\t" - "cmpz %0 || addi %0, #-1 \n\t" - "bc 2f || cmpz %0 \n\t" - "bnc 1b || addi %0, #-1 \n\t" - " .fillinsn \n\t" - "2: \n\t" - : "+r" (loops) - : "r" (0) - : "cbit" - ); -#else - __asm__ __volatile__ ( - "beqz %0, 2f \n\t" - " .fillinsn \n\t" - "1: \n\t" - "addi %0, #-1 \n\t" - "blez %0, 2f \n\t" - "addi %0, #-1 \n\t" - "blez %0, 2f \n\t" - "addi %0, #-1 \n\t" - "blez %0, 2f \n\t" - "addi %0, #-1 \n\t" - "bgtz %0, 1b \n\t" - " .fillinsn \n\t" - "2: \n\t" - : "+r" (loops) - : "r" (0) - ); -#endif -} - -void __const_udelay(unsigned long xloops) -{ -#if defined(CONFIG_ISA_M32R2) && defined(CONFIG_ISA_DSP_LEVEL2) - /* - * loops [1] = (xloops >> 32) [sec] * loops_per_jiffy [1/jiffy] - * * HZ [jiffy/sec] - * = (xloops >> 32) [sec] * (loops_per_jiffy * HZ) [1/sec] - * = (((xloops * loops_per_jiffy) >> 32) * HZ) [1] - * - * NOTE: - * - '[]' depicts variable's dimension in the above equation. - * - "rac" instruction rounds the accumulator in word size. - */ - __asm__ __volatile__ ( - "srli %0, #1 \n\t" - "mulwhi %0, %1 ; a0 \n\t" - "mulwu1 %0, %1 ; a1 \n\t" - "sadd ; a0 += (a1 >> 16) \n\t" - "rac a0, a0, #1 \n\t" - "mvfacmi %0, a0 \n\t" - : "+r" (xloops) - : "r" (current_cpu_data.loops_per_jiffy) - : "a0", "a1" - ); -#elif defined(CONFIG_ISA_M32R2) || defined(CONFIG_ISA_M32R) - /* - * u64 ull; - * ull = (u64)xloops * (u64)current_cpu_data.loops_per_jiffy; - * xloops = (ull >> 32); - */ - __asm__ __volatile__ ( - "and3 r4, %0, #0xffff \n\t" - "and3 r5, %1, #0xffff \n\t" - "mul r4, r5 \n\t" - "srl3 r6, %0, #16 \n\t" - "srli r4, #16 \n\t" - "mul r5, r6 \n\t" - "add r4, r5 \n\t" - "and3 r5, %0, #0xffff \n\t" - "srl3 r6, %1, #16 \n\t" - "mul r5, r6 \n\t" - "add r4, r5 \n\t" - "srl3 r5, %0, #16 \n\t" - "srli r4, #16 \n\t" - "mul r5, r6 \n\t" - "add r4, r5 \n\t" - "mv %0, r4 \n\t" - : "+r" (xloops) - : "r" (current_cpu_data.loops_per_jiffy) - : "r4", "r5", "r6" - ); -#else -#error unknown isa configuration -#endif - __delay(xloops * HZ); -} - -void __udelay(unsigned long usecs) -{ - __const_udelay(usecs * 0x000010c7); /* 2**32 / 1000000 (rounded up) */ -} - -void __ndelay(unsigned long nsecs) -{ - __const_udelay(nsecs * 0x00005); /* 2**32 / 1000000000 (rounded up) */ -} - -EXPORT_SYMBOL(__delay); -EXPORT_SYMBOL(__const_udelay); -EXPORT_SYMBOL(__udelay); -EXPORT_SYMBOL(__ndelay); |