| // Copyright 2017 The Fuchsia Authors |
| // |
| // Use of this source code is governed by a MIT-style |
| // license that can be found in the LICENSE file or at |
| // https://opensource.org/licenses/MIT |
| |
| #include <lib/counters.h> |
| #include <lib/special-sections/special-sections.h> |
| #include <platform.h> |
| #include <stdlib.h> |
| |
| #include <arch/ops.h> |
| #include <kernel/percpu.h> |
| #include <kernel/spinlock.h> |
| #include <lk/init.h> |
| |
| // kernel.ld uses this and fills in the descriptor table size after it and then |
| // places the sorted descriptor table after that (and then pads to page size), |
| // so as to fully populate the counters::DescriptorVmo layout. |
| static const uint64_t vmo_header SPECIAL_SECTION(".kcounter.desc.header", uint64_t)[] = { |
| counters::DescriptorVmo::kMagic, |
| SMP_MAX_CPUS, |
| }; |
| static_assert(sizeof(vmo_header) == offsetof(counters::DescriptorVmo, descriptor_table_size)); |
| |
| // This counter tracks how long it takes for Zircon to reach the last init level |
| // It also can show if the target does not reset the internal clock upon reboot |
| // which is true also for mexec (netboot) scenario. |
| KCOUNTER(init_time, "init.target.time.msec") |
| |
| static void counters_init(unsigned level) { init_time.Add(current_time() / 1000000LL); } |
| |
| LK_INIT_HOOK(kcounters, counters_init, LK_INIT_LEVEL_USER - 1) |
