u-boot/drivers/bootcount/bootcount_ram.c
Simon Glass 401d1c4f5d common: Drop asm/global_data.h from common header
Move this out of the common header and include it only where needed.  In
a number of cases this requires adding "struct udevice;" to avoid adding
another large header or in other cases replacing / adding missing header
files that had been pulled in, very indirectly.   Finally, we have a few
cases where we did not need to include <asm/global_data.h> at all, so
remove that include.

Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Rini <trini@konsulko.com>
2021-02-02 15:33:42 -05:00

66 lines
1.6 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2010
* Heiko Schocher, DENX Software Engineering, hs@denx.de.
*/
#include <common.h>
#include <cpu_func.h>
#include <asm/cache.h>
#include <asm/global_data.h>
#include <asm/io.h>
DECLARE_GLOBAL_DATA_PTR;
const ulong patterns[] = { 0x00000000,
0xFFFFFFFF,
0xFF00FF00,
0x0F0F0F0F,
0xF0F0F0F0};
const ulong NBR_OF_PATTERNS = sizeof(patterns) / sizeof(*patterns);
const ulong OFFS_PATTERN = 3;
const ulong REPEAT_PATTERN = 1000;
void bootcount_store(ulong a)
{
ulong *save_addr;
ulong size = 0;
int i;
for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++)
size += gd->bd->bi_dram[i].size;
save_addr = (ulong *)(size - BOOTCOUNT_ADDR);
writel(a, save_addr);
writel(CONFIG_SYS_BOOTCOUNT_MAGIC, &save_addr[1]);
for (i = 0; i < REPEAT_PATTERN; i++)
writel(patterns[i % NBR_OF_PATTERNS],
&save_addr[i + OFFS_PATTERN]);
/* Make sure the data is written to RAM */
flush_dcache_range((ulong)&save_addr[0],
(((ulong)&save_addr[REPEAT_PATTERN + OFFS_PATTERN] &
~(ARCH_DMA_MINALIGN - 1)) + ARCH_DMA_MINALIGN));
}
ulong bootcount_load(void)
{
ulong *save_addr;
ulong size = 0;
ulong counter = 0;
int i, tmp;
for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++)
size += gd->bd->bi_dram[i].size;
save_addr = (ulong *)(size - BOOTCOUNT_ADDR);
counter = readl(&save_addr[0]);
/* Is the counter reliable, check in the big pattern for bit errors */
for (i = 0; (i < REPEAT_PATTERN) && (counter != 0); i++) {
tmp = readl(&save_addr[i + OFFS_PATTERN]);
if (tmp != patterns[i % NBR_OF_PATTERNS])
counter = 0;
}
return counter;
}