1 // SPDX-License-Identifier: GPL-2.0+
3 * (C) Copyright 2016 Vladimir Zapolskiy <vz@mleia.com>
4 * (C) Copyright 2007 Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
10 #include <asm/processor.h>
11 #include <asm/system.h>
14 #define CACHE_UPDATED 2
16 static inline void cache_wback_all(void)
18 unsigned long addr, data, i, j;
20 for (i = 0; i < CACHE_OC_NUM_ENTRIES; i++) {
21 for (j = 0; j < CACHE_OC_NUM_WAYS; j++) {
22 addr = CACHE_OC_ADDRESS_ARRAY
23 | (j << CACHE_OC_WAY_SHIFT)
24 | (i << CACHE_OC_ENTRY_SHIFT);
26 if (data & CACHE_UPDATED) {
27 data &= ~CACHE_UPDATED;
34 #define CACHE_ENABLE 0
35 #define CACHE_DISABLE 1
37 static int cache_control(unsigned int cmd)
44 if (ccr & CCR_CACHE_ENABLE)
47 if (cmd == CACHE_DISABLE)
48 outl(CCR_CACHE_STOP, CCR);
50 outl(CCR_CACHE_INIT, CCR);
56 void flush_dcache_range(unsigned long start, unsigned long end)
60 start &= ~(L1_CACHE_BYTES - 1);
61 for (v = start; v < end; v += L1_CACHE_BYTES) {
62 asm volatile ("ocbp %0" : /* no output */
67 void invalidate_dcache_range(unsigned long start, unsigned long end)
71 start &= ~(L1_CACHE_BYTES - 1);
72 for (v = start; v < end; v += L1_CACHE_BYTES) {
73 asm volatile ("ocbi %0" : /* no output */
78 void flush_cache(unsigned long addr, unsigned long size)
80 flush_dcache_range(addr , addr + size);
83 void icache_enable(void)
85 cache_control(CACHE_ENABLE);
88 void icache_disable(void)
90 cache_control(CACHE_DISABLE);
93 int icache_status(void)
98 void dcache_enable(void)
102 void dcache_disable(void)
106 int dcache_status(void)