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bootcount: Make bootcount magic configurable

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Add new Kconfig option, SYS_BOOTCOUNT_MAGIC, to select the boot
counter magic word. This can be useful ie. in case the entire
boot counter register is not usable.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Tom Rini <trini@konsulko.com>
This commit is contained in:
Marek Vasut 2018-10-11 00:13:54 +02:00 committed by Tom Rini
parent 0533fb8b3f
commit 758694ff07
6 changed files with 19 additions and 13 deletions
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6
drivers/bootcount/Kconfig
View File

@ -127,4 +127,10 @@ config SYS_BOOTCOUNT_ADDR
help
Set the address used for reading and writing the boot counter.
config SYS_BOOTCOUNT_MAGIC
hex "Magic value for the boot counter"
default 0xB001C041
help
Set the magic value used for the boot counter.
endif

8
drivers/bootcount/bootcount.c
View File

@ -16,13 +16,13 @@ __weak void bootcount_store(ulong a)
uintptr_t flush_end;
#if defined(CONFIG_SYS_BOOTCOUNT_SINGLEWORD)
raw_bootcount_store(reg, (BOOTCOUNT_MAGIC & 0xffff0000) | a);
raw_bootcount_store(reg, (CONFIG_SYS_BOOTCOUNT_MAGIC & 0xffff0000) | a);
flush_end = roundup(CONFIG_SYS_BOOTCOUNT_ADDR + 4,
CONFIG_SYS_CACHELINE_SIZE);
#else
raw_bootcount_store(reg, a);
raw_bootcount_store(reg + 4, BOOTCOUNT_MAGIC);
raw_bootcount_store(reg + 4, CONFIG_SYS_BOOTCOUNT_MAGIC);
flush_end = roundup(CONFIG_SYS_BOOTCOUNT_ADDR + 8,
CONFIG_SYS_CACHELINE_SIZE);
@ -37,12 +37,12 @@ __weak ulong bootcount_load(void)
#if defined(CONFIG_SYS_BOOTCOUNT_SINGLEWORD)
u32 tmp = raw_bootcount_load(reg);
if ((tmp & 0xffff0000) != (BOOTCOUNT_MAGIC & 0xffff0000))
if ((tmp & 0xffff0000) != (CONFIG_SYS_BOOTCOUNT_MAGIC & 0xffff0000))
return 0;
else
return (tmp & 0x0000ffff);
#else
if (raw_bootcount_load(reg + 4) != BOOTCOUNT_MAGIC)
if (raw_bootcount_load(reg + 4) != CONFIG_SYS_BOOTCOUNT_MAGIC)
return 0;
else
return raw_bootcount_load(reg);

9
drivers/bootcount/bootcount_at91.c
View File

@ -6,14 +6,15 @@
#include <asm/arch/at91_gpbr.h>
/*
* We combine the BOOTCOUNT_MAGIC and bootcount in one 32-bit register.
* This is done so we need to use only one of the four GPBR registers.
* We combine the CONFIG_SYS_BOOTCOUNT_MAGIC and bootcount in one 32-bit
* register. This is done so we need to use only one of the four GPBR
* registers.
*/
void bootcount_store(ulong a)
{
at91_gpbr_t *gpbr = (at91_gpbr_t *) ATMEL_BASE_GPBR;
writel((BOOTCOUNT_MAGIC & 0xffff0000) | (a & 0x0000ffff),
writel((CONFIG_SYS_BOOTCOUNT_MAGIC & 0xffff0000) | (a & 0x0000ffff),
&gpbr->reg[AT91_GPBR_INDEX_BOOTCOUNT]);
}
@ -22,7 +23,7 @@ ulong bootcount_load(void)
at91_gpbr_t *gpbr = (at91_gpbr_t *) ATMEL_BASE_GPBR;
ulong val = readl(&gpbr->reg[AT91_GPBR_INDEX_BOOTCOUNT]);
if ((val & 0xffff0000) != (BOOTCOUNT_MAGIC & 0xffff0000))
if ((val & 0xffff0000) != (CONFIG_SYS_BOOTCOUNT_MAGIC & 0xffff0000))
return 0;
else
return val & 0x0000ffff;

4
drivers/bootcount/bootcount_davinci.c
View File

@ -24,7 +24,7 @@ void bootcount_store(ulong a)
writel(RTC_KICK0R_WE, &reg->kick0r);
writel(RTC_KICK1R_WE, &reg->kick1r);
raw_bootcount_store(&reg->scratch2,
(BOOTCOUNT_MAGIC & 0xffff0000) | (a & 0x0000ffff));
(CONFIG_SYS_BOOTCOUNT_MAGIC & 0xffff0000) | (a & 0x0000ffff));
}
ulong bootcount_load(void)
@ -34,7 +34,7 @@ ulong bootcount_load(void)
(struct davinci_rtc *)CONFIG_SYS_BOOTCOUNT_ADDR;
val = raw_bootcount_load(&reg->scratch2);
if ((val & 0xffff0000) != (BOOTCOUNT_MAGIC & 0xffff0000))
if ((val & 0xffff0000) != (CONFIG_SYS_BOOTCOUNT_MAGIC & 0xffff0000))
return 0;
else
return val & 0x0000ffff;

2
drivers/bootcount/bootcount_ram.c
View File

@ -28,7 +28,7 @@ void bootcount_store(ulong a)
size += gd->bd->bi_dram[i].size;
save_addr = (ulong *)(size - BOOTCOUNT_ADDR);
writel(a, save_addr);
writel(BOOTCOUNT_MAGIC, &save_addr[1]);
writel(CONFIG_SYS_BOOTCOUNT_MAGIC, &save_addr[1]);
for (i = 0; i < REPEAT_PATTERN; i++)
writel(patterns[i % NBR_OF_PATTERNS],

1
include/common.h
View File

@ -385,7 +385,6 @@ uint dpram_alloc(uint size);
uint dpram_alloc_align(uint size,uint align);
void bootcount_store (ulong);
ulong bootcount_load (void);
#define BOOTCOUNT_MAGIC 0xB001C041
/* $(CPU)/.../<eth> */
void mii_init (void);