| // Copyright 2022 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 |
| |
| #ifndef ZIRCON_KERNEL_INCLUDE_PLATFORM_BOOT_TIMESTAMPS_H_ |
| #define ZIRCON_KERNEL_INCLUDE_PLATFORM_BOOT_TIMESTAMPS_H_ |
| |
| #include <lib/arch/ticks.h> |
| #include <zircon/compiler.h> |
| |
| // Definitions of some timestamps which will be recorded after physboot runs, as |
| // the kernel boots, which eventually get exported as kcounters to allow metrics |
| // on how long it takes to get through various portions of early boot. |
| |
| __BEGIN_CDECLS |
| |
| // Samples taken at the first instruction in the kernel. |
| extern arch::EarlyTicks kernel_entry_ticks; |
| // ... and at the entry to normal virtual-space kernel code. |
| extern arch::EarlyTicks kernel_virtual_entry_ticks; |
| |
| __END_CDECLS |
| |
| #endif // ZIRCON_KERNEL_INCLUDE_PLATFORM_BOOT_TIMESTAMPS_H_ |
