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doc: update timer HLD doc after modularization

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Replace rdstc() and get_tsc_khz() with their architectural agnostic
counterparts cpu_ticks() and cpu_tickrate().

Tracked-On: #5920
Signed-off-by: Yi Liang <yi.liang@intel.com>
This commit is contained in:
Liang Yi
2021-05-31 11:10:02 +08:00
committed by David Kinder
parent 42dc49902b
commit 400d31916a
3 changed files with 16 additions and 9 deletions
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3
hypervisor/include/arch/x86/asm/tsc.h
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@@ -34,6 +34,9 @@ uint32_t get_tsc_khz(void);
/**
* @brief Calibrate Time Stamp Counter (TSC) frequency.
*
* @remark Generic time related routines, e.g., cpu_tickrate(), us_to_ticks(),
* udelay(), etc., relies on this function being called earlier during system initialization.
*
* @return None
*/
void calibrate_tsc(void);

4
hypervisor/include/common/ticks.h
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@@ -14,6 +14,8 @@
/**
* @brief Read current CPU tick count.
*
* @remark On x86, this is the Time Stamp Counter (TSC) value of the current logical CPU.
*
* @return CPU ticks
*/
uint64_t cpu_ticks(void);
@@ -21,6 +23,8 @@ uint64_t cpu_ticks(void);
/**
* @brief Get CPU tick frequency in KHz.
*
* @remark On x86, this is the Time Stamp Counter (TSC) frequency of the current logical CPU.
*
* @return CPU frequency (KHz)
*/
uint32_t cpu_tickrate(void);