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/*
* Copyright (c) 2023-2024 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 PURPOSE
* 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; LOSS 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
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _MACHINE_ASM_H_
#define _MACHINE_ASM_H_
#include <sys/types.h>
#include <sys/param.h>
#include <machine/msr.h>
/*
* Contains information for the current
* core. Stored in %GS.
*
* MUST REMAIN IN ORDER!!!
*/
struct cpu_ctx {
struct cpu_info *ci;
};
/*
* Returns true for this core if maskable
* interrupts are masked (CLI) and false if
* they aren't (STI).
*/
static inline bool
amd64_is_intr_mask(void)
{
uint64_t flags;
__ASMV("pushfq; pop %0" : "=rm" (flags) :: "memory");
return !ISSET(flags, BIT(9));
}
static inline void
amd64_write_gs_base(uintptr_t val)
{
wrmsr(IA32_KERNEL_GS_BASE, val);
}
static inline uintptr_t
amd64_read_gs_base(void)
{
return rdmsr(IA32_KERNEL_GS_BASE);
}
static inline uint64_t
amd64_read_cr0(void)
{
uint64_t cr0;
__ASMV("mov %%cr0, %0" : "=r" (cr0) :: "memory");
return cr0;
}
static inline void
amd64_write_cr0(uint64_t val)
{
__ASMV("mov %0, %%cr0" :: "r" (val) : "memory");
}
static inline uint64_t
amd64_read_cr8(void)
{
uint64_t cr8;
__ASMV("mov %%cr8, %0" : "=r" (cr8) :: "memory");
return cr8;
}
static inline void
amd64_write_cr8(uint64_t val)
{
__ASMV("mov %0, %%cr8" :: "r" (val) : "memory");
}
static inline uint64_t
amd64_read_cr4(void)
{
uint64_t cr4;
__ASMV("mov %%cr4, %0" : "=r" (cr4) :: "memory");
return cr4;
}
static inline void
amd64_write_cr4(uint64_t val)
{
__ASMV("mov %0, %%cr4" :: "r" (val) : "memory");
}
static inline void
amd64_fxsave(void *area)
{
__ASMV("fxsave (%0)" :: "r" (area) : "memory");
}
static inline void
amd64_fxrstor(void *area)
{
__ASMV("fxrstor (%0)" :: "r" (area) : "memory");
}
#endif
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