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/*
* Copyright (c) 2025 Ian Marco Moffett and the Osmora Team.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of Hyra nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPKERNE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LKERNS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* PKERNSIBILITY OF SUCH DAMAGE.
*/
#ifndef _MACHINE_MSR_H_
#define _MACHINE_MSR_H_ 1
#if !defined(__ASSEMBLER__)
#include <sys/cdefs.h>
#include <sys/types.h>
#endif /* !__ASSEMBLER__ */
#define IA32_APIC_BASE 0x0000001B
#define IA32_GS_BASE 0xC0000101
#define IA32_MTRR_CAP 0x000000FE
#define IA32_DEF_TYPE 0x000002FF
#define IA32_MTRR_PHYSBASE 0x00000200
#define IA32_MTRR_PHYSMASK 0x00000201
#define IA32_KERNEL_GS_BASE 0xC0000102
#if !defined(__ASSEMBLER__)
__always_inline static inline uint64_t
rdmsr(uint32_t msr)
{
uint32_t lo, hi;
__asm(
"rdmsr"
: "=a" (lo), "=d" (hi)
: "c" (msr)
: "memory"
);
return ((uint64_t)hi << 32) | lo;
}
__always_inline static inline void
wrmsr(uint32_t msr, uint64_t val)
{
uint32_t lo, hi;
lo = val & 0xFFFFFFFF;
hi = (val >> 32) & 0xFFFFFFFF;
__asm(
"wrmsr"
:
: "c" (msr), "a" (lo), "d" (hi)
: "memory"
);
}
#endif /* !__ASSEMBLER__ */
#endif /* !_MACHINE_MSR_H_ */
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