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/*
* Copyright (C) 2012-2015 Masahiro Yamada <yamada.masahiro@socionext.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <linux/io.h>
#include <asm/armv7.h>
#include "ssc-regs.h"
#ifdef CONFIG_UNIPHIER_L2CACHE_ON
static void uniphier_cache_sync(void)
{
writel(SSCOPE_CM_SYNC, SSCOPE); /* drain internal buffers */
readl(SSCOPE); /* need a read back to confirm */
}
static void uniphier_cache_maint_all(u32 operation)
{
/* try until the command is successfully set */
do {
writel(SSCOQM_S_ALL | SSCOQM_CE | operation, SSCOQM);
} while (readl(SSCOPPQSEF) & (SSCOPPQSEF_FE | SSCOPPQSEF_OE));
/* wait until the operation is completed */
while (readl(SSCOLPQS) != SSCOLPQS_EF)
;
/* clear the complete notification flag */
writel(SSCOLPQS_EF, SSCOLPQS);
uniphier_cache_sync();
}
void v7_outer_cache_flush_all(void)
{
uniphier_cache_maint_all(SSCOQM_CM_WB_INV);
}
void v7_outer_cache_inval_all(void)
{
uniphier_cache_maint_all(SSCOQM_CM_INV);
}
static void __uniphier_cache_maint_range(u32 start, u32 size, u32 operation)
{
/* try until the command is successfully set */
do {
writel(SSCOQM_S_ADDRESS | SSCOQM_CE | operation, SSCOQM);
writel(start, SSCOQAD);
writel(size, SSCOQSZ);
} while (readl(SSCOPPQSEF) & (SSCOPPQSEF_FE | SSCOPPQSEF_OE));
/* wait until the operation is completed */
while (readl(SSCOLPQS) != SSCOLPQS_EF)
;
/* clear the complete notification flag */
writel(SSCOLPQS_EF, SSCOLPQS);
}
static void uniphier_cache_maint_range(u32 start, u32 end, u32 operation)
{
u32 size;
/*
* If start address is not aligned to cache-line,
* do cache operation for the first cache-line
*/
start = start & ~(SSC_LINE_SIZE - 1);
size = end - start;
if (unlikely(size >= (u32)(-SSC_LINE_SIZE))) {
/* this means cache operation for all range */
uniphier_cache_maint_all(operation);
return;
}
/*
* If end address is not aligned to cache-line,
* do cache operation for the last cache-line
*/
size = ALIGN(size, SSC_LINE_SIZE);
while (size) {
u32 chunk_size = size > SSC_RANGE_OP_MAX_SIZE ?
SSC_RANGE_OP_MAX_SIZE : size;
__uniphier_cache_maint_range(start, chunk_size, operation);
start += chunk_size;
size -= chunk_size;
}
uniphier_cache_sync();
}
void v7_outer_cache_flush_range(u32 start, u32 end)
{
uniphier_cache_maint_range(start, end, SSCOQM_CM_WB_INV);
}
void v7_outer_cache_inval_range(u32 start, u32 end)
{
if (start & (SSC_LINE_SIZE - 1)) {
start &= ~(SSC_LINE_SIZE - 1);
__uniphier_cache_maint_range(start, SSC_LINE_SIZE,
SSCOQM_CM_WB_INV);
start += SSC_LINE_SIZE;
}
if (start >= end) {
uniphier_cache_sync();
return;
}
if (end & (SSC_LINE_SIZE - 1)) {
end &= ~(SSC_LINE_SIZE - 1);
__uniphier_cache_maint_range(end, SSC_LINE_SIZE,
SSCOQM_CM_WB_INV);
}
if (start >= end) {
uniphier_cache_sync();
return;
}
uniphier_cache_maint_range(start, end, SSCOQM_CM_INV);
}
void v7_outer_cache_enable(void)
{
u32 tmp;
tmp = readl(SSCC);
tmp |= SSCC_ON;
writel(tmp, SSCC);
}
#endif
void v7_outer_cache_disable(void)
{
u32 tmp;
tmp = readl(SSCC);
tmp &= ~SSCC_ON;
writel(tmp, SSCC);
}
void enable_caches(void)
{
dcache_enable();
}
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