1/* 2 * This file and its contents are supplied under the terms of the 3 * Common Development and Distribution License ("CDDL"), version 1.0. 4 * You may only use this file in accordance with the terms of version 5 * 1.0 of the CDDL. 6 * 7 * A full copy of the text of the CDDL should have accompanied this 8 * source. A copy of the CDDL is also available via the Internet at 9 * http://www.illumos.org/license/CDDL. 10 */ 11 12/* 13 * Copyright 2022 Oxide Computer Company 14 */ 15 16#include <sys/asm_linkage.h> 17 18/* void outb(uint16_t port, uint8_t val) */ 19ENTRY(outb) 20 movw %di, %dx 21 movb %sil, %al 22 outb (%dx) 23 ret 24SET_SIZE(outb) 25 26/* void outw(uint16_t port, uint16_t val) */ 27ENTRY(outw) 28 movw %di, %dx 29 movw %si, %ax 30 outw (%dx) 31 ret 32SET_SIZE(outb) 33 34/* void outl(uint16_t port, uint32_t val) */ 35ENTRY(outl) 36 movw %di, %dx 37 movl %esi, %eax 38 outl (%dx) 39 ret 40SET_SIZE(outl) 41 42/* uint8_t inb(uint16_t port) */ 43ENTRY(inb) 44 movw %di, %dx 45 inb (%dx) 46 ret 47SET_SIZE(inb) 48 49/* uint16_t inw(uint16_t port) */ 50ENTRY(inw) 51 movw %di, %dx 52 inw (%dx) 53 ret 54SET_SIZE(inw) 55 56/* uint32_t inl(uint16_t port) */ 57ENTRY(inl) 58 movw %di, %dx 59 inl (%dx) 60 ret 61SET_SIZE(inl) 62 63/* uint64_t wrmsr(uint32_t msr) */ 64ENTRY(rdmsr) 65 movl %edi, %ecx 66 rdmsr 67 shlq $32, %rdx 68 orq %rdx, %rax 69 ret 70SET_SIZE(rdmsr) 71 72/* void wrmsr(uint32_t msr, uint64_t val) */ 73ENTRY(wrmsr) 74 movq %rsi, %rdx 75 shrq $32, %rdx 76 movl %esi, %eax 77 movl %edi, %ecx 78 wrmsr 79 ret 80SET_SIZE(wrmsr) 81 82/* void cpuid(uint32_t in_eax, uint32_t in_ecx, uint32_t *out_regs) */ 83ENTRY(cpuid) 84 pushq %rbx 85 movl %edi, %eax 86 movl %esi, %ecx 87 movq %rdx, %r8 88 cpuid 89 movl %eax, (%r8) 90 movl %ebx, 4(%r8) 91 movl %ecx, 8(%r8) 92 movl %edx, 12(%r8) 93 popq %rbx 94 ret 95SET_SIZE(cpuid) 96