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/*
* This file and its contents are supplied under the terms of the
* Common Development and Distribution License ("CDDL"), version 1.0.
* You may only use this file in accordance with the terms of version
* 1.0 of the CDDL.
*
* A full copy of the text of the CDDL should have accompanied this
* source. A copy of the CDDL is also available via the Internet at
* http://www.illumos.org/license/CDDL.
*/
/*
* Copyright 2022 Oxide Computer Company
*/
#include <sys/asm_linkage.h>
/* void outb(uint16_t port, uint8_t val) */
ENTRY(outb)
movw %di, %dx
movb %sil, %al
outb (%dx)
ret
SET_SIZE(outb)
/* void outw(uint16_t port, uint16_t val) */
ENTRY(outw)
movw %di, %dx
movw %si, %ax
outw (%dx)
ret
SET_SIZE(outb)
/* void outl(uint16_t port, uint32_t val) */
ENTRY(outl)
movw %di, %dx
movl %esi, %eax
outl (%dx)
ret
SET_SIZE(outl)
/* uint8_t inb(uint16_t port) */
ENTRY(inb)
movw %di, %dx
inb (%dx)
ret
SET_SIZE(inb)
/* uint16_t inw(uint16_t port) */
ENTRY(inw)
movw %di, %dx
inw (%dx)
ret
SET_SIZE(inw)
/* uint32_t inl(uint16_t port) */
ENTRY(inl)
movw %di, %dx
inl (%dx)
ret
SET_SIZE(inl)
/* uint64_t wrmsr(uint32_t msr) */
ENTRY(rdmsr)
movl %edi, %ecx
rdmsr
shlq $32, %rdx
orq %rdx, %rax
ret
SET_SIZE(rdmsr)
/* void wrmsr(uint32_t msr, uint64_t val) */
ENTRY(wrmsr)
movq %rsi, %rdx
shrq $32, %rdx
movl %esi, %eax
movl %edi, %ecx
wrmsr
ret
SET_SIZE(wrmsr)
/* void cpuid(uint32_t in_eax, uint32_t in_ecx, uint32_t *out_regs) */
ENTRY(cpuid)
pushq %rbx
movl %edi, %eax
movl %esi, %ecx
movq %rdx, %r8
cpuid
movl %eax, (%r8)
movl %ebx, 4(%r8)
movl %ecx, 8(%r8)
movl %edx, 12(%r8)
popq %rbx
ret
SET_SIZE(cpuid)
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