mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-29 22:02:02 +00:00
33 lines
604 B
C
33 lines
604 B
C
|
// SPDX-License-Identifier: GPL-2.0
|
||
|
|
#define BOOT_CTYPE_H
|
||
|
|
#include "misc.h"
|
||
|
|
#include "error.h"
|
||
|
|
#include "../string.h"
|
||
|
|
|
||
|
|
#ifdef CONFIG_ACPI
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Max length of 64-bit hex address string is 19, prefix "0x" + 16 hex
|
||
|
|
* digits, and '\0' for termination.
|
||
|
|
*/
|
||
|
|
#define MAX_ADDR_LEN 19
|
||
|
|
|
||
|
|
static acpi_physical_address get_acpi_rsdp(void)
|
||
|
|
{
|
||
|
|
acpi_physical_address addr = 0;
|
||
|
|
|
||
|
|
#ifdef CONFIG_KEXEC
|
||
|
|
char val[MAX_ADDR_LEN] = { };
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
ret = cmdline_find_option("acpi_rsdp", val, MAX_ADDR_LEN);
|
||
|
|
if (ret < 0)
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
if (kstrtoull(val, 16, &addr))
|
||
|
|
return 0;
|
||
|
|
#endif
|
||
|
|
return addr;
|
||
|
|
}
|
||
|
|
#endif /* CONFIG_ACPI */
|