425fdeb2f9
This CL uses a 16-bit value (instead of an 8-bit value) for the year.
This is needed because the function internally does a "year % 100", so
the year should not be truncated to 8-bit before applying the modulo.
This fixes a regression introduced in commit e929a75.
BUG=b:200538760
TEST=deployed coreboot. Manually verified that year is correct using
"elogtool list"
TEST=test_that -b $BOARD $DUT firmware_EventLog
Change-Id: I17578ff99af5b31b216ac53c22e53b1b70df5084
Signed-off-by: Ricardo Quesada <ricardoq@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/57816
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
88 lines
2.2 KiB
C
88 lines
2.2 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause */
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#include <commonlib/bsd/bcd.h>
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#include <commonlib/bsd/elog.h>
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#include <stddef.h>
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/*
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* verify and validate if header is a valid coreboot Event Log header.
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* return CB_ERR if invalid, otherwise CB_SUCCESS.
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*/
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enum cb_err elog_verify_header(const struct elog_header *header)
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{
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if (header == NULL)
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return CB_ERR;
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if (header->magic != ELOG_SIGNATURE)
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return CB_ERR;
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if (header->version != ELOG_VERSION)
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return CB_ERR;
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if (header->header_size != sizeof(*header))
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return CB_ERR;
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return CB_SUCCESS;
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}
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/*
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* return the next elog event.
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* return NULL if event is invalid.
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*/
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const struct event_header *elog_get_next_event(const struct event_header *event)
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{
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if (!event)
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return NULL;
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/* Point to next event */
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return (const struct event_header *)((const void *)(event) + event->length);
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}
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/* return the data associated to the event_header. */
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const void *event_get_data(const struct event_header *event)
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{
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/*
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* Pointing to the next event returns the data, since data is the first
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* field right after the header.
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*/
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return (const void *)(&event[1]);
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}
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/* Populate timestamp in event header with given time. */
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void elog_fill_timestamp(struct event_header *event, uint8_t sec, uint8_t min,
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uint8_t hour, uint8_t mday, uint8_t mon, uint16_t year)
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{
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event->second = bin2bcd(sec);
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event->minute = bin2bcd(min);
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event->hour = bin2bcd(hour);
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event->day = bin2bcd(mday);
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event->month = bin2bcd(mon);
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event->year = bin2bcd(year % 100);
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/* Basic check of expected ranges. */
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if (event->month > 0x12 || event->day > 0x31 || event->hour > 0x23 ||
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event->minute > 0x59 || event->second > 0x59) {
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event->year = 0;
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event->month = 0;
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event->day = 0;
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event->hour = 0;
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event->minute = 0;
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event->second = 0;
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}
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}
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void elog_update_checksum(struct event_header *event, uint8_t checksum)
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{
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uint8_t *event_data = (uint8_t *)event;
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event_data[event->length - 1] = checksum;
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}
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uint8_t elog_checksum_event(const struct event_header *event)
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{
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uint8_t index, checksum = 0;
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const uint8_t *data = (const uint8_t *)event;
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for (index = 0; index < event->length; index++)
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checksum += data[index];
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return checksum;
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}
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