11a1589223
Files which are installed as-is (any .service and other unit files, .conf files, .policy files, etc), are left as is. My assumption is that SPDX identifiers are not yet that well known, so it's better to retain the extended header to avoid any doubt. I also kept any copyright lines. We can probably remove them, but it'd nice to obtain explicit acks from all involved authors before doing that.
53 lines
1.4 KiB
C
53 lines
1.4 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ */
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/***
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This file is part of systemd.
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Copyright 2012 Lennart Poettering
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Copyright 2013 Kay Sievers
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***/
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#include "acpi-fpdt.h"
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#include "boot-timestamps.h"
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#include "efivars.h"
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#include "macro.h"
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#include "time-util.h"
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int boot_timestamps(const dual_timestamp *n, dual_timestamp *firmware, dual_timestamp *loader) {
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usec_t x = 0, y = 0, a;
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int r;
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dual_timestamp _n;
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assert(firmware);
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assert(loader);
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if (!n) {
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dual_timestamp_get(&_n);
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n = &_n;
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}
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r = acpi_get_boot_usec(&x, &y);
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if (r < 0) {
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r = efi_loader_get_boot_usec(&x, &y);
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if (r < 0)
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return r;
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}
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/* Let's convert this to timestamps where the firmware
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* began/loader began working. To make this more confusing:
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* since usec_t is unsigned and the kernel's monotonic clock
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* begins at kernel initialization we'll actually initialize
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* the monotonic timestamps here as negative of the actual
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* value. */
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firmware->monotonic = y;
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loader->monotonic = y - x;
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a = n->monotonic + firmware->monotonic;
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firmware->realtime = n->realtime > a ? n->realtime - a : 0;
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a = n->monotonic + loader->monotonic;
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loader->realtime = n->realtime > a ? n->realtime - a : 0;
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return 0;
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}
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