mirror of
https://github.com/UniXNU/NativeAdreno.git
synced 2026-11-08 08:04:59 +03:00
bluseliu50
56 lines
2.2 KiB
C++
56 lines
2.2 KiB
C++
/* SPDX-License-Identifier: MIT */
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#include "NativeAdrenoTimer.h"
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#include <IOKit/IOLib.h>
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/* Derivation, not a guess:
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* pinned a6xx_gmu.xml GMU_ALWAYS_ON_COUNTER_L 0x1f888, _H 0x1f889
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* (dword offsets, variants A6XX-A7XX)
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* pinned sm8550.dtsi gpu@3d00000, gmu@3d6a000
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* byte offset = (offset << 2) - (gmu_base - gpu_base)
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* = (0x1f888 << 2) - 0x6a000 = 0x14220
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* pinned a6xx.xml CP_ALWAYS_ON_COUNTER 0x0980 (64-bit, A6XX-A7XX)
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* read as low at 0x0980 and high at 0x0981, as Linux gpu_read64 does. */
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enum : uint32_t {
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TimerGmuLow = 0x14220,
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TimerGmuHigh = 0x14224,
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TimerCpLow = 0x0980,
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TimerCpHigh = 0x0981,
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TimerRetries = 8
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};
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uint32_t NativeAdrenoTimer::gmuLowOffset(){return TimerGmuLow;}
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uint32_t NativeAdrenoTimer::gmuHighOffset(){return TimerGmuHigh;}
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uint32_t NativeAdrenoTimer::cpLowRegister(){return TimerCpLow;}
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uint32_t NativeAdrenoTimer::cpHighRegister(){return TimerCpHigh;}
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IOReturn NativeAdrenoTimer::attach(const NativeAdrenoTimeIo *io,uint32_t source)
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{
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if(attached_)return kIOReturnBusy;
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if(!io || !io->read32)return kIOReturnBadArgument;
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if(source!=NativeAdrenoTimeGmu && source!=NativeAdrenoTimeCp)return kIOReturnBadArgument;
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io_=*io;source_=source;attached_=true;
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return kIOReturnSuccess;
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}
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IOReturn NativeAdrenoTimer::detach()
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{
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if(!attached_)return kIOReturnNotReady;
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attached_=false;io_={};
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return kIOReturnSuccess;
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}
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IOReturn NativeAdrenoTimer::read(uint64_t *ticks) const
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{
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if(!ticks)return kIOReturnBadArgument;*ticks=0;
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if(!attached_)return kIOReturnNotReady;
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const uint32_t low=source_==NativeAdrenoTimeGmu?TimerGmuLow:TimerCpLow;
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const uint32_t high=source_==NativeAdrenoTimeGmu?TimerGmuHigh:TimerCpHigh;
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for(unsigned attempt=0;attempt<TimerRetries;++attempt) {
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uint32_t first=0,low_word=0,second=0;
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if(io_.read32(io_.cookie,high,&first) ||
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io_.read32(io_.cookie,low,&low_word) ||
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io_.read32(io_.cookie,high,&second))return kIOReturnIOError;
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if(first==second) {
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*ticks=(uint64_t(first)<<32)|low_word;
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return kIOReturnSuccess;
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}
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}
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return kIOReturnTimeout;
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}
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