source: mainline/arch/ia32/src/asm.s@ 4ffa9e0

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since 4ffa9e0 was f761f1eb, checked in by Jakub Jermar <jakub@…>, 21 years ago

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1#
2# Copyright (C) 2001-2004 Jakub Jermar
3# All rights reserved.
4#
5# Redistribution and use in source and binary forms, with or without
6# modification, are permitted provided that the following conditions
7# are met:
8#
9# - Redistributions of source code must retain the above copyright
10# notice, this list of conditions and the following disclaimer.
11# - Redistributions in binary form must reproduce the above copyright
12# notice, this list of conditions and the following disclaimer in the
13# documentation and/or other materials provided with the distribution.
14# - The name of the author may not be used to endorse or promote products
15# derived from this software without specific prior written permission.
16#
17# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27#
28
29# very low and hardware-level functions
30
31.text
32
33.global cpu_priority_high
34.global cpu_priority_low
35.global cpu_priority_restore
36.global cpu_priority_read
37.global cpu_halt
38.global cpu_sleep
39.global paging_on
40.global cpu_read_dba
41.global cpu_write_dba
42.global cpu_read_cr2
43.global enable_l_apic_in_msr
44.global interrupt_handlers
45.global inb
46.global inw
47.global inl
48.global outb
49.global outw
50.global outl
51.global memcopy
52.global memsetb
53.global memsetw
54.global memcmp
55
56#
57# set priority level high
58cpu_priority_high:
59 pushf
60 pop %eax
61 cli
62 ret
63
64#
65# set priority level low
66cpu_priority_low:
67 pushf
68 pop %eax
69 sti
70 ret
71
72#
73# restore priority level
74cpu_priority_restore:
75 push 4(%esp)
76 popf
77 ret
78
79# return raw priority level
80cpu_priority_read:
81 pushf
82 pop %eax
83 ret
84
85cpu_halt:
86cpu_sleep:
87 hlt
88 ret
89
90paging_on:
91 pushl %eax
92 movl %cr0,%eax
93 orl $(1<<31),%eax # paging on
94 andl $~((1<<30)|(1<<29)),%eax # clear Cache Disable and not Write Though
95 movl %eax,%cr0
96 jmp 0f
970:
98 popl %eax
99 ret
100
101cpu_read_dba:
102 movl %cr3,%eax
103 ret
104
105cpu_write_dba:
106 pushl %eax
107 movl 8(%esp),%eax
108 movl %eax,%cr3
109 popl %eax
110 ret
111
112cpu_read_cr2:
113 movl %cr2,%eax
114 ret
115
116enable_l_apic_in_msr:
117 pusha
118
119 movl $0x1b, %ecx
120 rdmsr
121 orl $(1<<11),%eax
122 orl $(0xfee00000),%eax
123 wrmsr
124
125 popa
126 ret
127
128.macro handler i n
129 push %ebp
130 movl %esp,%ebp
131 pusha
132
133 # we must fill the data segment registers
134 movw $16,%ax
135 movw %ax,%ds
136 movw %ax,%es
137
138 movl $(\i),%edi
139 pushl %ebp
140 addl $4,(%esp)
141 pushl %edi
142 call trap_dispatcher
143 addl $8,%esp
144
145 popa
146 pop %ebp
147
148 iret
149
150 .if (\n-\i)-1
151 handler "(\i+1)",\n
152 .endif
153.endm
154
155# keep in sync with pm.h !!!
156IDT_ITEMS=64
157interrupt_handlers:
158h_start:
159 handler 0 64
160# handler 64 128
161# handler 128 192
162# handler 192 256
163h_end:
164
165
166inb:
167 push %edx
168 xorl %eax,%eax
169 movl 8(%esp),%edx
170 inb %dx,%al
171 pop %edx
172 ret
173
174inw:
175 push %edx
176 xorl %eax,%eax
177 movl 8(%esp),%edx
178 inw %dx,%ax
179 pop %edx
180 ret
181
182inl:
183 push %edx
184 xorl %eax,%eax
185 movl 8(%esp),%edx
186 inl %dx,%eax
187 pop %edx
188 ret
189
190outb:
191 push %ebp
192 movl %esp,%ebp
193 pusha
194
195 movl 8(%ebp),%edx
196 movl 12(%ebp),%eax
197 outb %al,%dx
198
199 popa
200 pop %ebp
201 ret
202
203outw:
204 push %ebp
205 movl %esp,%ebp
206 pusha
207
208 movl 8(%ebp),%edx
209 movl 12(%ebp),%eax
210 outw %ax,%dx
211
212 popa
213 pop %ebp
214 ret
215
216outl:
217 push %ebp
218 movl %esp,%ebp
219 pusha
220
221 movl 8(%ebp),%edx
222 movl 12(%ebp),%eax
223 outl %eax,%dx
224
225 popa
226 pop %ebp
227 ret
228
229SRC=8
230DST=12
231CNT=16
232memcopy:
233 push %ebp
234 movl %esp,%ebp
235 pusha
236
237 cld
238 movl CNT(%ebp),%ecx
239 movl DST(%ebp),%edi
240 movl SRC(%ebp),%esi
241
242 rep movsb %ds:(%esi),%es:(%edi)
243
244 popa
245 pop %ebp
246 ret
247
248DST=8
249CNT=12
250X=16
251memsetw:
252 push %ebp
253 movl %esp,%ebp
254 pusha
255
256 cld
257 movl CNT(%ebp),%ecx
258 movl DST(%ebp),%edi
259 movl X(%ebp),%eax
260
261 rep stosw %ax,%es:(%edi)
262
263 popa
264 pop %ebp
265 ret
266
267DST=8
268CNT=12
269X=16
270memsetb:
271 push %ebp
272 movl %esp,%ebp
273 pusha
274
275 cld
276 movl CNT(%ebp),%ecx
277 movl DST(%ebp),%edi
278 movl X(%ebp),%eax
279
280 rep stosb %al,%es:(%edi)
281
282 popa
283 pop %ebp
284 ret
285
286SRC=12
287DST=16
288CNT=20
289memcmp:
290 push %ebp
291 subl $4,%esp
292 movl %esp,%ebp
293
294 pusha
295
296 cld
297 movl CNT(%ebp),%ecx
298 movl DST(%ebp),%edi
299 movl SRC(%ebp),%esi
300
301 repe cmpsb %es:(%edi),%ds:(%esi)
302 movl %ecx,(%ebp)
303
304 popa
305
306 movl (%ebp),%eax # return value => %eax (zero on success)
307 addl $4,%esp
308 pop %ebp
309
310 ret
311
312
313# THIS IS USERSPACE CODE
314.global utext
315utext:
3160:
317 movl $0xdeadbeaf, %eax
318 int $48
319 jmp 0b
320 # not reached
321utext_end:
322
323.data
324.global utext_size
325utext_size:
326 .long utext_end - utext
327
328
329.section K_DATA_START
330.global interrupt_handler_size
331
332interrupt_handler_size: .long (h_end-h_start)/IDT_ITEMS
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