C++ (Cpp) acpi_scan_rsd_ptr 예제들

예제 #1

/*
 * Public interfaces
 */
ACPI_TABLE_RSDP *
acpi_find_rsd_ptr(void)
{
	ACPI_TABLE_RSDP *rsdp;
	char		buf[20];
	u_long		addr;
	size_t		len;

	acpi_user_init();

	addr = 0;

	/* Attempt to use kenv or sysctl to find RSD PTR record. */
	if (kenv(KENV_GET, hint_acpi_0_rsdp, buf, 20) == 0)
		addr = strtoul(buf, NULL, 0);
	if (addr == 0) {
		len = sizeof(addr);
		if (sysctlbyname(machdep_acpi_root, &addr, &len, NULL, 0) != 0)
			addr = 0;
	}
	if (addr != 0 && (rsdp = acpi_get_rsdp(addr)) != NULL)
		return (rsdp);

	return (acpi_scan_rsd_ptr());
}

예제 #2

파일: acpi_user.c 프로젝트: ryo/netbsd-src

/*
 * Public interfaces
 */
ACPI_TABLE_RSDP *
acpi_find_rsd_ptr(void)
{
	int i;
	uint8_t		buf[sizeof(ACPI_TABLE_RSDP)];

	acpi_user_init();
	for (i = 0; i < 1024 * 1024; i += 16) {
		read(acpi_mem_fd, buf, 16);
		if (!memcmp(buf, "RSD PTR ", 8)) {
			/* Read the rest of the structure */
			read(acpi_mem_fd, buf + 16, sizeof(ACPI_TABLE_RSDP) - 16);

			/* Verify checksum before accepting it. */
			if (acpi_checksum(buf, sizeof(ACPI_TABLE_RSDP)))
				continue;
			return (acpi_map_physical(i, sizeof(ACPI_TABLE_RSDP)));
		}
	}

	return acpi_scan_rsd_ptr();
}