mirror of
https://github.com/EnderIce2/Fennix.git
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72 lines
1.8 KiB
C++
72 lines
1.8 KiB
C++
/*
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This file is part of Fennix Kernel.
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Fennix Kernel is free software: you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation, either version 3 of
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the License, or (at your option) any later version.
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Fennix Kernel is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Fennix Kernel. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include <time.hpp>
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#include <memory.hpp>
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#include <acpi.hpp>
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#include <debug.h>
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#include <io.h>
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#include "../../kernel.h"
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#define KVM_CLOCK_PAIRING_WALLCLOCK 0
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namespace Time
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{
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extern "C" void kvm_hc_clock_pairing(uint64_t phys_addr, uint64_t clock_type)
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{
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#if defined(__amd64__)
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asm volatile(
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"mov $9, %%eax\n\t" /* KVM_HC_CLOCK_PAIRING */
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"mov %%rdi, %%rbx\n\t"
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"mov %%rsi, %%rcx\n\t"
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"vmcall\n\t"
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:
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: "D"(phys_addr), "S"(clock_type)
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: "rax", "rbx", "rcx");
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#else
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#warning "KVM clock pairing not implemented for this architecture"
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#endif
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}
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bool KVMClock::Sleep(uint64_t Nanoseconds)
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{
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return true;
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}
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uint64_t KVMClock::GetNanoseconds()
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{
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return 0;
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}
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KVMClock::KVMClock()
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{
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if (strcmp(CPU::Hypervisor(), x86_CPUID_VENDOR_KVM) != 0)
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return;
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this->Pairing = (kvm_clock_pairing *)KernelAllocator.RequestPages(TO_PAGES(sizeof(kvm_clock_pairing)));
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kvm_hc_clock_pairing((uint64_t)this->Pairing, KVM_CLOCK_PAIRING_WALLCLOCK);
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// KPrint("sec: %lld, nsec: %lld, tsc: %lld", this->Pairing->sec, this->Pairing->nsec, this->Pairing->tsc);
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// KPrint("flags: %x", this->Pairing->flags);
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}
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KVMClock::~KVMClock()
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{
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}
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}
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