diff options
Diffstat (limited to 'src/shared/acpi-fpdt.c')
| -rw-r--r-- | src/shared/acpi-fpdt.c | 164 |
1 files changed, 0 insertions, 164 deletions
diff --git a/src/shared/acpi-fpdt.c b/src/shared/acpi-fpdt.c deleted file mode 100644 index 6779691c28..0000000000 --- a/src/shared/acpi-fpdt.c +++ /dev/null @@ -1,164 +0,0 @@ -/*** - This file is part of systemd. - - Copyright 2013 Kay Sievers - - systemd is free software; you can redistribute it and/or modify it - under the terms of the GNU Lesser General Public License as published by - the Free Software Foundation; either version 2.1 of the License, or - (at your option) any later version. - - systemd is distributed in the hope that it will be useful, but - WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public License - along with systemd; If not, see <http://www.gnu.org/licenses/>. -***/ - -#include <errno.h> -#include <fcntl.h> -#include <stddef.h> -#include <stdint.h> -#include <string.h> -#include <unistd.h> - -#include "acpi-fpdt.h" -#include "alloc-util.h" -#include "fd-util.h" -#include "fileio.h" -#include "time-util.h" - -struct acpi_table_header { - char signature[4]; - uint32_t length; - uint8_t revision; - uint8_t checksum; - char oem_id[6]; - char oem_table_id[8]; - uint32_t oem_revision; - char asl_compiler_id[4]; - uint32_t asl_compiler_revision; -}; - -enum { - ACPI_FPDT_TYPE_BOOT = 0, - ACPI_FPDT_TYPE_S3PERF = 1, -}; - -struct acpi_fpdt_header { - uint16_t type; - uint8_t length; - uint8_t revision; - uint8_t reserved[4]; - uint64_t ptr; -}; - -struct acpi_fpdt_boot_header { - char signature[4]; - uint32_t length; -}; - -enum { - ACPI_FPDT_S3PERF_RESUME_REC = 0, - ACPI_FPDT_S3PERF_SUSPEND_REC = 1, - ACPI_FPDT_BOOT_REC = 2, -}; - -struct acpi_fpdt_boot { - uint16_t type; - uint8_t length; - uint8_t revision; - uint8_t reserved[4]; - uint64_t reset_end; - uint64_t load_start; - uint64_t startup_start; - uint64_t exit_services_entry; - uint64_t exit_services_exit; -}; - -int acpi_get_boot_usec(usec_t *loader_start, usec_t *loader_exit) { - _cleanup_free_ char *buf = NULL; - struct acpi_table_header *tbl; - size_t l = 0; - struct acpi_fpdt_header *rec; - int r; - uint64_t ptr = 0; - _cleanup_close_ int fd = -1; - struct acpi_fpdt_boot_header hbrec; - struct acpi_fpdt_boot brec; - - r = read_full_file("/sys/firmware/acpi/tables/FPDT", &buf, &l); - if (r < 0) - return r; - - if (l < sizeof(struct acpi_table_header) + sizeof(struct acpi_fpdt_header)) - return -EINVAL; - - tbl = (struct acpi_table_header *)buf; - if (l != tbl->length) - return -EINVAL; - - if (memcmp(tbl->signature, "FPDT", 4) != 0) - return -EINVAL; - - /* find Firmware Basic Boot Performance Pointer Record */ - for (rec = (struct acpi_fpdt_header *)(buf + sizeof(struct acpi_table_header)); - (char *)rec < buf + l; - rec = (struct acpi_fpdt_header *)((char *)rec + rec->length)) { - if (rec->length <= 0) - break; - if (rec->type != ACPI_FPDT_TYPE_BOOT) - continue; - if (rec->length != sizeof(struct acpi_fpdt_header)) - continue; - - ptr = rec->ptr; - break; - } - - if (ptr == 0) - return -ENODATA; - - /* read Firmware Basic Boot Performance Data Record */ - fd = open("/dev/mem", O_CLOEXEC|O_RDONLY); - if (fd < 0) - return -errno; - - l = pread(fd, &hbrec, sizeof(struct acpi_fpdt_boot_header), ptr); - if (l != sizeof(struct acpi_fpdt_boot_header)) - return -EINVAL; - - if (memcmp(hbrec.signature, "FBPT", 4) != 0) - return -EINVAL; - - if (hbrec.length < sizeof(struct acpi_fpdt_boot_header) + sizeof(struct acpi_fpdt_boot)) - return -EINVAL; - - l = pread(fd, &brec, sizeof(struct acpi_fpdt_boot), ptr + sizeof(struct acpi_fpdt_boot_header)); - if (l != sizeof(struct acpi_fpdt_boot)) - return -EINVAL; - - if (brec.length != sizeof(struct acpi_fpdt_boot)) - return -EINVAL; - - if (brec.type != ACPI_FPDT_BOOT_REC) - return -EINVAL; - - if (brec.exit_services_exit == 0) - /* Non-UEFI compatible boot. */ - return -ENODATA; - - if (brec.startup_start == 0 || brec.exit_services_exit < brec.startup_start) - return -EINVAL; - if (brec.exit_services_exit > NSEC_PER_HOUR) - return -EINVAL; - - if (loader_start) - *loader_start = brec.startup_start / 1000; - if (loader_exit) - *loader_exit = brec.exit_services_exit / 1000; - - return 0; -} |