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// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2010
* Texas Instruments, <www.ti.com>
* Aneesh V <aneesh@ti.com>
*/
#include <cpu_func.h>
#include <asm/cache.h>
#include <linux/types.h>
#include <asm/armv7.h>
#include <asm/utils.h>
#define ARMV7_DCACHE_INVAL_RANGE 1
#define ARMV7_DCACHE_CLEAN_INVAL_RANGE 2
#if !CONFIG_IS_ENABLED(SYS_DCACHE_OFF)
/* Asm functions from cache_v7_asm.S */
void v7_flush_dcache_all(void);
void v7_invalidate_dcache_all(void);
static u32 get_ccsidr(void)
{
u32 ccsidr;
/* Read current CP15 Cache Size ID Register */
asm volatile ("mrc p15, 1, %0, c0, c0, 0" : "=r" (ccsidr));
return ccsidr;
}
static void v7_dcache_clean_inval_range(u32 start, u32 stop, u32 line_len)
{
u32 mva;
/* Align start to cache line boundary */
start &= ~(line_len - 1);
for (mva = start; mva < stop; mva = mva + line_len) {
/* DCCIMVAC - Clean & Invalidate data cache by MVA to PoC */
asm volatile ("mcr p15, 0, %0, c7, c14, 1" : : "r" (mva));
}
}
static void v7_dcache_inval_range(u32 start, u32 stop, u32 line_len)
{
u32 mva;
if (!check_cache_range(start, stop))
return;
for (mva = start; mva < stop; mva = mva + line_len) {
/* DCIMVAC - Invalidate data cache by MVA to PoC */
asm volatile ("mcr p15, 0, %0, c7, c6, 1" : : "r" (mva));
}
}
static void v7_dcache_maint_range(u32 start, u32 stop, u32 range_op)
{
u32 line_len, ccsidr;
ccsidr = get_ccsidr();
line_len = ((ccsidr & CCSIDR_LINE_SIZE_MASK) >>
CCSIDR_LINE_SIZE_OFFSET) + 2;
/* Converting from words to bytes */
line_len += 2;
/* converting from log2(linelen) to linelen */
line_len = 1 << line_len;
switch (range_op) {
case ARMV7_DCACHE_CLEAN_INVAL_RANGE:
v7_dcache_clean_inval_range(start, stop, line_len);
break;
case ARMV7_DCACHE_INVAL_RANGE:
v7_dcache_inval_range(start, stop, line_len);
break;
}
/* DSB to make sure the operation is complete */
dsb();
}
/* Invalidate TLB */
static void v7_inval_tlb(void)
{
/* Invalidate entire unified TLB */
asm volatile ("mcr p15, 0, %0, c8, c7, 0" : : "r" (0));
/* Invalidate entire data TLB */
asm volatile ("mcr p15, 0, %0, c8, c6, 0" : : "r" (0));
/* Invalidate entire instruction TLB */
asm volatile ("mcr p15, 0, %0, c8, c5, 0" : : "r" (0));
/* Full system DSB - make sure that the invalidation is complete */
dsb();
/* Full system ISB - make sure the instruction stream sees it */
isb();
}
void invalidate_dcache_all(void)
{
v7_invalidate_dcache_all();
v7_outer_cache_inval_all();
}
/*
* Performs a clean & invalidation of the entire data cache
* at all levels
*/
void flush_dcache_all(void)
{
v7_flush_dcache_all();
v7_outer_cache_flush_all();
}
/*
* Invalidates range in all levels of D-cache/unified cache used:
* Affects the range [start, stop - 1]
*/
void invalidate_dcache_range(unsigned long start, unsigned long stop)
{
check_cache_range(start, stop);
v7_dcache_maint_range(start, stop, ARMV7_DCACHE_INVAL_RANGE);
v7_outer_cache_inval_range(start, stop);
}
/*
* Flush range(clean & invalidate) from all levels of D-cache/unified
* cache used:
* Affects the range [start, stop - 1]
*/
void flush_dcache_range(unsigned long start, unsigned long stop)
{
check_cache_range(start, stop);
v7_dcache_maint_range(start, stop, ARMV7_DCACHE_CLEAN_INVAL_RANGE);
v7_outer_cache_flush_range(start, stop);
}
void arm_init_before_mmu(void)
{
v7_outer_cache_enable();
invalidate_dcache_all();
v7_inval_tlb();
}
void mmu_page_table_flush(unsigned long start, unsigned long stop)
{
flush_dcache_range(start, stop);
v7_inval_tlb();
}
#else /* #if !CONFIG_IS_ENABLED(SYS_DCACHE_OFF) */
void invalidate_dcache_all(void)
{
}
void flush_dcache_all(void)
{
}
void invalidate_dcache_range(unsigned long start, unsigned long stop)
{
}
void flush_dcache_range(unsigned long start, unsigned long stop)
{
}
void arm_init_before_mmu(void)
{
}
void mmu_page_table_flush(unsigned long start, unsigned long stop)
{
}
#endif /* #if !CONFIG_IS_ENABLED(SYS_DCACHE_OFF) */
#if !CONFIG_IS_ENABLED(SYS_ICACHE_OFF)
/* Invalidate entire I-cache and branch predictor array */
void invalidate_icache_all(void)
{
/*
* Invalidate all instruction caches to PoU.
* Also flushes branch target cache.
*/
asm volatile ("mcr p15, 0, %0, c7, c5, 0" : : "r" (0));
/* Invalidate entire branch predictor array */
asm volatile ("mcr p15, 0, %0, c7, c5, 6" : : "r" (0));
/* Full system DSB - make sure that the invalidation is complete */
dsb();
/* ISB - make sure the instruction stream sees it */
isb();
}
#else
void invalidate_icache_all(void)
{
}
#endif
/* Stub implementations for outer cache operations */
__weak void v7_outer_cache_enable(void) {}
__weak void v7_outer_cache_disable(void) {}
__weak void v7_outer_cache_flush_all(void) {}
__weak void v7_outer_cache_inval_all(void) {}
__weak void v7_outer_cache_flush_range(u32 start, u32 end) {}
__weak void v7_outer_cache_inval_range(u32 start, u32 end) {}
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