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/*
* Copyright (C) 2012-2014 Panasonic Corporation
* Author: Masahiro Yamada <yamada.m@jp.panasonic.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <asm/io.h>
#include <asm/armv7.h>
#include <mach/ssc-regs.h>
#ifdef CONFIG_UNIPHIER_L2CACHE_ON
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);
writel(SSCOPE_CM_SYNC, SSCOPE); /* drain internal buffers */
readl(SSCOPE); /* need a read back to confirm */
}
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);
if (start == 0 && end >= (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 = (end - start + SSC_LINE_SIZE - 1) & ~(SSC_LINE_SIZE - 1);
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;
}
writel(SSCOPE_CM_SYNC, SSCOPE); /* drain internal buffers */
readl(SSCOPE); /* need a read back to confirm */
}
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)
{
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 wakeup_secondary(void);
void enable_caches(void)
{
uint32_t reg;
#ifdef CONFIG_UNIPHIER_SMP
/*
* The secondary CPU must move to DDR,
* before L2 disable.
* On SPL, the Page Table is located on the L2.
*/
wakeup_secondary();
#endif
/*
* UniPhier SoCs must use L2 cache for init stack pointer.
* We disable L2 and L1 in this order.
* If CONFIG_SYS_DCACHE_OFF is not defined,
* caches are enabled again with a new page table.
*/
/* L2 disable */
v7_outer_cache_disable();
/* L1 disable */
reg = get_cr();
reg &= ~(CR_C | CR_M);
set_cr(reg);
#ifndef CONFIG_SYS_DCACHE_OFF
dcache_enable();
#endif
}
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