From b750101eb236130cf056c675997decbac904cc49 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 17:35:18 +0200 Subject: Adding upstream version 252.22. Signed-off-by: Daniel Baumann --- src/shared/boot-timestamps.c | 46 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 46 insertions(+) create mode 100644 src/shared/boot-timestamps.c (limited to 'src/shared/boot-timestamps.c') diff --git a/src/shared/boot-timestamps.c b/src/shared/boot-timestamps.c new file mode 100644 index 0000000..8786e89 --- /dev/null +++ b/src/shared/boot-timestamps.c @@ -0,0 +1,46 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later */ + +#include "acpi-fpdt.h" +#include "boot-timestamps.h" +#include "efi-loader.h" +#include "macro.h" +#include "time-util.h" + +int boot_timestamps(const dual_timestamp *n, dual_timestamp *firmware, dual_timestamp *loader) { + usec_t x = 0, y = 0, a; + int r; + dual_timestamp _n; + + assert(firmware); + assert(loader); + + if (!n) { + dual_timestamp_get(&_n); + n = &_n; + } + + r = acpi_get_boot_usec(&x, &y); + if (r < 0) { + r = efi_loader_get_boot_usec(&x, &y); + if (r < 0) + return r; + } + + /* Let's convert this to timestamps where the firmware + * began/loader began working. To make this more confusing: + * since usec_t is unsigned and the kernel's monotonic clock + * begins at kernel initialization we'll actually initialize + * the monotonic timestamps here as negative of the actual + * value. */ + + firmware->monotonic = y; + loader->monotonic = y - x; + + a = n->monotonic + firmware->monotonic; + firmware->realtime = n->realtime > a ? n->realtime - a : 0; + + a = n->monotonic + loader->monotonic; + loader->realtime = n->realtime > a ? n->realtime - a : 0; + + return 0; +} -- cgit v1.2.3