1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * (C) Copyright 2011 4 * Ilya Yanok, EmCraft Systems 5 */ 6 #include <linux/types.h> 7 #include <common.h> 8 9 #ifndef CONFIG_SYS_DCACHE_OFF 10 void invalidate_dcache_all(void) 11 { 12 asm volatile("mcr p15, 0, %0, c7, c6, 0\n" : : "r"(0)); 13 } 14 15 void flush_dcache_all(void) 16 { 17 asm volatile( 18 "0:" 19 "mrc p15, 0, r15, c7, c14, 3\n" 20 "bne 0b\n" 21 "mcr p15, 0, %0, c7, c10, 4\n" 22 : : "r"(0) : "memory" 23 ); 24 } 25 26 void invalidate_dcache_range(unsigned long start, unsigned long stop) 27 { 28 if (!check_cache_range(start, stop)) 29 return; 30 31 while (start < stop) { 32 asm volatile("mcr p15, 0, %0, c7, c6, 1\n" : : "r"(start)); 33 start += CONFIG_SYS_CACHELINE_SIZE; 34 } 35 } 36 37 void flush_dcache_range(unsigned long start, unsigned long stop) 38 { 39 if (!check_cache_range(start, stop)) 40 return; 41 42 while (start < stop) { 43 asm volatile("mcr p15, 0, %0, c7, c14, 1\n" : : "r"(start)); 44 start += CONFIG_SYS_CACHELINE_SIZE; 45 } 46 47 asm volatile("mcr p15, 0, %0, c7, c10, 4\n" : : "r"(0)); 48 } 49 #else /* #ifndef CONFIG_SYS_DCACHE_OFF */ 50 void invalidate_dcache_all(void) 51 { 52 } 53 54 void flush_dcache_all(void) 55 { 56 } 57 #endif /* #ifndef CONFIG_SYS_DCACHE_OFF */ 58 59 /* 60 * Stub implementations for l2 cache operations 61 */ 62 63 __weak void l2_cache_disable(void) {} 64 65 #if CONFIG_IS_ENABLED(SYS_THUMB_BUILD) 66 __weak void invalidate_l2_cache(void) {} 67 #endif 68