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 2023 Oxide Computer Company
14 */
15
16#include <sys/asm_linkage.h>
17#include "payload_common.h"
18
19/* void outb(uint16_t port, uint8_t val) */
20ENTRY(outb)
21	movw    %di, %dx
22	movb    %sil, %al
23	outb    (%dx)
24	ret
25SET_SIZE(outb)
26
27/* void outw(uint16_t port, uint16_t val) */
28ENTRY(outw)
29	movw    %di, %dx
30	movw    %si, %ax
31	outw    (%dx)
32	ret
33SET_SIZE(outb)
34
35/* void outl(uint16_t port, uint32_t val) */
36ENTRY(outl)
37	movw    %di, %dx
38	movl    %esi, %eax
39	outl    (%dx)
40	ret
41SET_SIZE(outl)
42
43/* uint8_t inb(uint16_t port) */
44ENTRY(inb)
45	movw    %di, %dx
46	inb    (%dx)
47	ret
48SET_SIZE(inb)
49
50/* uint16_t inw(uint16_t port) */
51ENTRY(inw)
52	movw    %di, %dx
53	inw    (%dx)
54	ret
55SET_SIZE(inw)
56
57/* uint32_t inl(uint16_t port) */
58ENTRY(inl)
59	movw    %di, %dx
60	inl    (%dx)
61	ret
62SET_SIZE(inl)
63
64/* uint64_t rdmsr(uint32_t msr) */
65ENTRY(rdmsr)
66	movl    %edi, %ecx
67	rdmsr
68	shlq    $32, %rdx
69	orq     %rdx, %rax
70	ret
71SET_SIZE(rdmsr)
72
73/* void wrmsr(uint32_t msr, uint64_t val) */
74ENTRY(wrmsr)
75	movq    %rsi, %rdx
76	shrq    $32, %rdx
77	movl    %esi, %eax
78	movl    %edi, %ecx
79	wrmsr
80	ret
81SET_SIZE(wrmsr)
82
83/* void cpuid(uint32_t in_eax, uint32_t in_ecx, uint32_t *out_regs) */
84ENTRY(cpuid)
85	pushq   %rbx
86	movl    %edi, %eax
87	movl    %esi, %ecx
88	movq    %rdx, %r8
89	cpuid
90	movl    %eax, (%r8)
91	movl    %ebx, 4(%r8)
92	movl    %ecx, 8(%r8)
93	movl    %edx, 12(%r8)
94	popq    %rbx
95	ret
96SET_SIZE(cpuid)
97
98/* uint64_t rdtsc(void) */
99ENTRY(rdtsc)
100	rdtsc
101	shlq    $32, %rdx
102	orq     %rdx, %rax
103	ret
104SET_SIZE(rdtsc)
105
106/* void ud2a(void) */
107ENTRY(ud2a)
108	ud2a
109SET_SIZE(ud2a)
110
111/* void test_result_pass(void) */
112ENTRY(test_result_pass)
113	movl    $IOP_TEST_RESULT, %edi
114	movl    $TEST_RESULT_PASS, %esi
115	call    outb
116	ret
117SET_SIZE(test_result_pass)
118
119/* void test_result_fail(void) */
120ENTRY(test_result_fail)
121	movl    $IOP_TEST_RESULT, %edi
122	movl    $TEST_RESULT_FAIL, %esi
123	call    outb
124	ret
125SET_SIZE(test_result_fail)
126
127/* void test_msg(const char *) */
128ENTRY(test_msg)
129	/*
130	 * Message address is assumed to be in lower 32-bits, since that is where
131	 * the payload is currently being mapped.
132	 */
133	movl    %edi, %esi
134	movl    $IOP_TEST_MSG, %edi
135	call    outl
136
137	ret
138SET_SIZE(test_msg)
139