u-boot/arch/arm/lib/cache-pl310.c
Tom Rini 83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 09:34:12 -04:00

101 lines
2.4 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2010
* Texas Instruments, <www.ti.com>
* Aneesh V <aneesh@ti.com>
*/
#include <linux/types.h>
#include <asm/io.h>
#include <asm/armv7.h>
#include <asm/pl310.h>
#include <config.h>
#include <common.h>
struct pl310_regs *const pl310 = (struct pl310_regs *)CONFIG_SYS_PL310_BASE;
static void pl310_cache_sync(void)
{
writel(0, &pl310->pl310_cache_sync);
}
static void pl310_background_op_all_ways(u32 *op_reg)
{
u32 assoc_16, associativity, way_mask;
assoc_16 = readl(&pl310->pl310_aux_ctrl) &
PL310_AUX_CTRL_ASSOCIATIVITY_MASK;
if (assoc_16)
associativity = 16;
else
associativity = 8;
way_mask = (1 << associativity) - 1;
/* Invalidate all ways */
writel(way_mask, op_reg);
/* Wait for all ways to be invalidated */
while (readl(op_reg) && way_mask)
;
pl310_cache_sync();
}
void v7_outer_cache_inval_all(void)
{
pl310_background_op_all_ways(&pl310->pl310_inv_way);
}
void v7_outer_cache_flush_all(void)
{
pl310_background_op_all_ways(&pl310->pl310_clean_inv_way);
}
/* Flush(clean invalidate) memory from start to stop-1 */
void v7_outer_cache_flush_range(u32 start, u32 stop)
{
/* PL310 currently supports only 32 bytes cache line */
u32 pa, line_size = 32;
/*
* Align to the beginning of cache-line - this ensures that
* the first 5 bits are 0 as required by PL310 TRM
*/
start &= ~(line_size - 1);
for (pa = start; pa < stop; pa = pa + line_size)
writel(pa, &pl310->pl310_clean_inv_line_pa);
pl310_cache_sync();
}
/* invalidate memory from start to stop-1 */
void v7_outer_cache_inval_range(u32 start, u32 stop)
{
/* PL310 currently supports only 32 bytes cache line */
u32 pa, line_size = 32;
/*
* If start address is not aligned to cache-line do not
* invalidate the first cache-line
*/
if (start & (line_size - 1)) {
printf("ERROR: %s - start address is not aligned - 0x%08x\n",
__func__, start);
/* move to next cache line */
start = (start + line_size - 1) & ~(line_size - 1);
}
/*
* If stop address is not aligned to cache-line do not
* invalidate the last cache-line
*/
if (stop & (line_size - 1)) {
printf("ERROR: %s - stop address is not aligned - 0x%08x\n",
__func__, stop);
/* align to the beginning of this cache line */
stop &= ~(line_size - 1);
}
for (pa = start; pa < stop; pa = pa + line_size)
writel(pa, &pl310->pl310_inv_line_pa);
pl310_cache_sync();
}