gem5::free_bsd::SkipUDelay< ABI, Base > Class Template Reference

A class to skip udelay() and related calls in the kernel. More...

#include <events.hh>

Inheritance diagram for gem5::free_bsd::SkipUDelay< ABI, Base >:

Public Member Functions
	SkipUDelay (PCEventScope *s, const std::string &desc, Addr addr, uint64_t mult, uint64_t div)
void	process (ThreadContext *tc) override

Private Attributes
uint64_t	argDivToNs
	value to divide arg by to create ns.
uint64_t	argMultToNs
	value to multiple arg by to create ns.

Detailed Description

template<typename ABI, typename Base>
class gem5::free_bsd::SkipUDelay< ABI, Base >

A class to skip udelay() and related calls in the kernel.

This class has two additional parameters that take the argument to udelay and manipulated it to come up with ns and eventually ticks to quiesce for. See descriptions of argDivToNs and argMultToNs below.

Definition at line 54 of file events.hh.

Constructor & Destructor Documentation

SkipUDelay()

template<typename ABI , typename Base >

gem5::free_bsd::SkipUDelay< ABI, Base >::SkipUDelay ( PCEventScope * s, const std::string & desc, Addr addr, uint64_t mult, uint64_t div )

inline

Definition at line 69 of file events.hh.

Member Function Documentation

process()

template<typename ABI , typename Base >

void gem5::free_bsd::SkipUDelay< ABI, Base >::process ( ThreadContext * tc )

inlineoverride

Definition at line 75 of file events.hh.

References gem5::free_bsd::SkipUDelay< ABI, Base >::argDivToNs, gem5::free_bsd::SkipUDelay< ABI, Base >::argMultToNs, gem5::invokeSimcall(), and gem5::free_bsd::onUDelay().

Member Data Documentation

argDivToNs

template<typename ABI , typename Base >

uint64_t gem5::free_bsd::SkipUDelay< ABI, Base >::argDivToNs

private

value to divide arg by to create ns.

This is present beacues the linux kernel code sometime precomputes the first multiply that is done in udelay() if the parameter is a constant. We need to undo it so here is how.

Definition at line 61 of file events.hh.

Referenced by gem5::free_bsd::SkipUDelay< ABI, Base >::process().

argMultToNs

template<typename ABI , typename Base >

uint64_t gem5::free_bsd::SkipUDelay< ABI, Base >::argMultToNs

private

value to multiple arg by to create ns.

Nominally, this is 1000 to convert us to ns, but since linux can do some preprocessing of constant values something else might be required.

Definition at line 66 of file events.hh.

Referenced by gem5::free_bsd::SkipUDelay< ABI, Base >::process().

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The documentation for this class was generated from the following file:

• kern/freebsd/events.hh