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1/*
2 * Copyright (c) 2006 Apple Computer, Inc. All rights reserved.
3 *
2d21ac55 4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
0c530ab8 5 *
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6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. The rights granted to you under the License
10 * may not be used to create, or enable the creation or redistribution of,
11 * unlawful or unlicensed copies of an Apple operating system, or to
12 * circumvent, violate, or enable the circumvention or violation of, any
13 * terms of an Apple operating system software license agreement.
0c530ab8 14 *
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15 * Please obtain a copy of the License at
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.
17 *
18 * The Original Code and all software distributed under the License are
19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23 * Please see the License for the specific language governing rights and
24 * limitations under the License.
0c530ab8 25 *
2d21ac55 26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
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27 */
28
29#include <platforms.h>
30#include <mach_kdb.h>
31
32#include <i386/asm.h>
33#include <i386/asm64.h>
34#include <i386/proc_reg.h>
35#include <i386/postcode.h>
36#include <assym.s>
37
38 .data
39 .align 3
40 .globl EXT(gdtptr64)
41 /* align below right */
42 .word 0
43LEXT(gdtptr64)
44 .word Times(8,GDTSZ)-1
45 /* XXX really want .quad here */
46 .long EXT(master_gdt)
47 .long KERNEL_UBER_BASE_HI32 /* must be in uber-space */
48
49 .align 3
50 .globl EXT(idtptr64)
51 /* align below right */
52 .word 0
53LEXT(idtptr64)
54 .word Times(16,IDTSZ)-1
55 /* XXX really want .quad here */
56 .long EXT(master_idt64)
57 .long KERNEL_UBER_BASE_HI32 /* must be in uber-space */
58
59 .text
60
61Entry(ml_load_desc64)
62
63 ENTER_64BIT_MODE()
64
65 POSTCODE(ML_LOAD_DESC64_ENTRY)
66
67 lgdt EXT(gdtptr64) /* load GDT */
68
69 POSTCODE(ML_LOAD_DESC64_GDT)
70
71 lidt EXT(idtptr64) /* load IDT */
72
73 POSTCODE(ML_LOAD_DESC64_IDT)
74
75 movw $(KERNEL_LDT),%ax /* get LDT segment */
76 lldt %ax /* load LDT */
77
78 POSTCODE(ML_LOAD_DESC64_LDT)
79
80 movw $(KERNEL_TSS),%ax
81 ltr %ax /* set up KTSS */
82
83 POSTCODE(ML_LOAD_DESC64_EXIT)
84
85 ENTER_COMPAT_MODE()
86
87 ret
88
89
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90Entry(ml_64bit_lldt)
91 /* (int32_t selector) */
92
93 FRAME
94
95 ENTER_64BIT_MODE()
96
97 movl B_ARG0, %eax
98 lldt %ax
99
100 ENTER_COMPAT_MODE()
101
102 EMARF
103 ret
104
105Entry(set_64bit_debug_regs)
106 /* x86_debug_state64_t *ds */
107
108 FRAME
109
110 ENTER_64BIT_MODE()
111
112 mov B_ARG0, %edx
113 mov DS64_DR0(%edx), %rax
114 mov %rax, %dr0
115 mov DS64_DR1(%edx), %rax
116 mov %rax, %dr1
117 mov DS64_DR2(%edx), %rax
118 mov %rax, %dr2
119 mov DS64_DR3(%edx), %rax
120 mov %rax, %dr3
121
122 ENTER_COMPAT_MODE()
123
124 EMARF
125 ret
126
127Entry(flush_tlb64)
128
129 FRAME
130
131 ENTER_64BIT_MODE()
132
133 mov %cr3, %rax
134 mov %rax, %cr3
135
136 ENTER_COMPAT_MODE()
137
138 EMARF
139 ret
140
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141Entry(set64_cr3)
142
143 FRAME
144
145 movl B_ARG0, %eax
146 movl B_ARG1, %edx
147
148 ENTER_64BIT_MODE()
149
150 /* %rax = %edx:%eax */
151 shl $32, %rax
152 shrd $32, %rdx, %rax
153
154 mov %rax, %cr3
155
156 ENTER_COMPAT_MODE()
157
158 EMARF
159 ret
160
161Entry(get64_cr3)
162
163 FRAME
164
165 ENTER_64BIT_MODE()
166
167 mov %cr3, %rax
168 mov %rax, %rdx
169 shr $32, %rdx // %edx:%eax = %cr3
170
171 ENTER_COMPAT_MODE()
172
173 EMARF
174 ret
175
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176Entry(cpuid64)
177 ENTER_64BIT_MODE()
178 cpuid
179 ENTER_COMPAT_MODE()
180 ret
181
182
0c530ab8 183/* FXSAVE and FXRSTOR operate in a mode dependent fashion, hence these variants.
2d21ac55 184 * Must be called with interrupts disabled.
2d21ac55 185 */
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186
187Entry(fxsave64)
188 movl S_ARG0,%eax
189 ENTER_64BIT_MODE()
060df5ea 190 fxsave (%eax)
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191 ENTER_COMPAT_MODE()
192 ret
193
194Entry(fxrstor64)
195 movl S_ARG0,%eax
196 ENTER_64BIT_MODE()
060df5ea 197 fxrstor (%rax)
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198 ENTER_COMPAT_MODE()
199 ret
b0d623f7 200
060df5ea 201Entry(xsave64o)
b0d623f7 202 ENTER_64BIT_MODE()
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203 .short 0xAE0F
204 /* MOD 0x4, ECX, 0x1 */
205 .byte 0x21
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206 ENTER_COMPAT_MODE()
207 ret
208
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209Entry(xrstor64o)
210 ENTER_64BIT_MODE()
211 .short 0xAE0F
212 /* MOD 0x5, ECX 0x1 */
213 .byte 0x29
214 ENTER_COMPAT_MODE()
215 ret