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1 | # |
1 | # |
2 | # Copyright (C) 2001-2004 Jakub Jermar |
2 | # Copyright (C) 2001-2004 Jakub Jermar |
3 | # All rights reserved. |
3 | # All rights reserved. |
4 | # |
4 | # |
5 | # Redistribution and use in source and binary forms, with or without |
5 | # Redistribution and use in source and binary forms, with or without |
6 | # modification, are permitted provided that the following conditions |
6 | # modification, are permitted provided that the following conditions |
7 | # are met: |
7 | # are met: |
8 | # |
8 | # |
9 | # - Redistributions of source code must retain the above copyright |
9 | # - Redistributions of source code must retain the above copyright |
10 | # notice, this list of conditions and the following disclaimer. |
10 | # notice, this list of conditions and the following disclaimer. |
11 | # - Redistributions in binary form must reproduce the above copyright |
11 | # - Redistributions in binary form must reproduce the above copyright |
12 | # notice, this list of conditions and the following disclaimer in the |
12 | # notice, this list of conditions and the following disclaimer in the |
13 | # documentation and/or other materials provided with the distribution. |
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 |
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. |
15 | # derived from this software without specific prior written permission. |
16 | # |
16 | # |
17 | # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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 |
18 | # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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 |
23 | # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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 |
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. |
26 | # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | # |
27 | # |
28 | 28 | ||
29 | ## very low and hardware-level functions |
29 | ## very low and hardware-level functions |
30 | 30 | ||
31 | # Mask for interrupts 0 - 31 (bits 0 - 31) where 0 means that int has no error word |
31 | # Mask for interrupts 0 - 31 (bits 0 - 31) where 0 means that int has no error word |
32 | # and 1 means interrupt with error word |
32 | # and 1 means interrupt with error word |
33 | #define ERROR_WORD_INTERRUPT_LIST 0x00027D00 |
33 | #define ERROR_WORD_INTERRUPT_LIST 0x00027D00 |
34 | 34 | ||
35 | .text |
35 | .text |
36 | 36 | ||
37 | .global paging_on |
37 | .global paging_on |
38 | .global enable_l_apic_in_msr |
38 | .global enable_l_apic_in_msr |
39 | .global interrupt_handlers |
39 | .global interrupt_handlers |
40 | 40 | ||
41 | ## Turn paging on |
41 | ## Turn paging on |
42 | # |
42 | # |
43 | # Enable paging and write-back caching in CR0. |
43 | # Enable paging and write-back caching in CR0. |
44 | # |
44 | # |
45 | paging_on: |
45 | paging_on: |
46 | movl %cr0,%edx |
46 | movl %cr0,%edx |
47 | orl $(1<<31),%edx # paging on |
47 | orl $(1<<31),%edx # paging on |
48 | andl $~((1<<30)|(1<<29)),%edx # clear Cache Disable and not Write Though |
48 | andl $~((1<<30)|(1<<29)),%edx # clear Cache Disable and not Write Though |
49 | movl %edx,%cr0 |
49 | movl %edx,%cr0 |
50 | jmp 0f |
50 | jmp 0f |
51 | 0: |
51 | 0: |
52 | ret |
52 | ret |
53 | 53 | ||
54 | 54 | ||
55 | ## Enable local APIC |
55 | ## Enable local APIC |
56 | # |
56 | # |
57 | # Enable local APIC in MSR. |
57 | # Enable local APIC in MSR. |
58 | # |
58 | # |
59 | enable_l_apic_in_msr: |
59 | enable_l_apic_in_msr: |
60 | push %eax |
60 | push %eax |
61 | 61 | ||
62 | movl $0x1b, %ecx |
62 | movl $0x1b, %ecx |
63 | rdmsr |
63 | rdmsr |
64 | orl $(1<<11),%eax |
64 | orl $(1<<11),%eax |
65 | orl $(0xfee00000),%eax |
65 | orl $(0xfee00000),%eax |
66 | wrmsr |
66 | wrmsr |
67 | 67 | ||
68 | pop %eax |
68 | pop %eax |
69 | ret |
69 | ret |
70 | 70 | ||
71 | 71 | ||
72 | ## Declare interrupt handlers |
72 | ## Declare interrupt handlers |
73 | # |
73 | # |
74 | # Declare interrupt handlers for n interrupt |
74 | # Declare interrupt handlers for n interrupt |
75 | # vectors starting at vector i. |
75 | # vectors starting at vector i. |
76 | # |
76 | # |
77 | # The handlers setup data segment registers |
77 | # The handlers setup data segment registers |
78 | # and call exc_dispatch(). |
78 | # and call exc_dispatch(). |
79 | # |
79 | # |
80 | .macro handler i n |
80 | .macro handler i n |
81 | push %ebp |
81 | push %eax |
- | 82 | ||
- | 83 | # Test if this is interrupt with error word or not |
|
82 | movl %esp,%ebp |
84 | movl $(1<<\i), %eax |
- | 85 | andl $ERROR_WORD_INTERRUPT_LIST,%eax |
|
- | 86 | ||
- | 87 | /* |
|
- | 88 | * If this interrupt/exception stores error word, |
|
- | 89 | * we need to pop EAX. |
|
- | 90 | * If this interrupt doesn't store error word, we emulate it |
|
- | 91 | * for the sake of consistent pstate structure. In that case |
|
- | 92 | * we merely leave the EAX on the stack. |
|
- | 93 | */ |
|
83 | pusha |
94 | jz 0f |
- | 95 | ||
- | 96 | /* |
|
- | 97 | * This exception stores error word. |
|
- | 98 | */ |
|
- | 99 | pop %eax |
|
- | 100 | jmp 1f |
|
- | 101 | ||
- | 102 | 0: |
|
- | 103 | /* |
|
- | 104 | * This interrupt doesn't store error word. |
|
- | 105 | * Just restore EAX without doing POP. |
|
- | 106 | */ |
|
- | 107 | movl (%esp), %eax |
|
84 | 108 | ||
- | 109 | 1: |
|
- | 110 | pusha |
|
- | 111 | movl %esp, %ebp |
|
85 | push %ds |
112 | push %ds |
86 | push %es |
113 | push %es |
87 | 114 | ||
88 | # we must fill the data segment registers |
115 | # we must fill the data segment registers |
89 | movw $16,%ax |
116 | movw $16,%ax |
90 | movw %ax,%ds |
117 | movw %ax,%ds |
91 | movw %ax,%es |
118 | movw %ax,%es |
92 | 119 | ||
93 | movl $(\i),%edi |
120 | movl $(\i),%edi |
94 | pushl %ebp |
121 | pushl %ebp |
95 | addl $4,(%esp) |
- | |
96 | pushl %edi |
122 | pushl %edi |
97 | call exc_dispatch |
123 | call exc_dispatch |
98 | addl $8,%esp |
124 | addl $8,%esp |
99 | 125 | ||
100 | pop %es |
126 | pop %es |
101 | pop %ds |
127 | pop %ds |
102 | 128 | ||
103 | - | ||
104 | # CLNT |
129 | # Clear Nested Task flag. |
105 | pushfl |
130 | pushfl |
106 | pop %eax |
131 | pop %eax |
107 | and $0xFFFFBFFF,%eax |
132 | and $0xFFFFBFFF,%eax |
108 | push %eax |
133 | push %eax |
109 | popfl |
134 | popfl |
110 | 135 | ||
111 | - | ||
112 | - | ||
113 | # Test if this is interrupt with error word or not |
- | |
114 | mov $\i,%cl |
- | |
115 | movl $1,%eax |
- | |
116 | test $0xe0,%cl |
- | |
117 | jnz 0f |
- | |
118 | and $0x1f,%cl |
- | |
119 | shl %cl,%eax |
- | |
120 | and $ERROR_WORD_INTERRUPT_LIST,%eax |
- | |
121 | jz 0f |
- | |
122 | - | ||
123 | - | ||
124 | # Return with error word |
- | |
125 | popa |
- | |
126 | pop %ebp |
- | |
127 | add $4,%esp # Skip error word |
- | |
128 | iret |
- | |
129 | - | ||
130 | 0: |
- | |
131 | # Return with no error word |
- | |
132 | popa |
136 | popa |
133 | pop %ebp |
137 | add $4,%esp # Skip error word, whether real or fake. |
134 | iret |
138 | iret |
135 | 139 | ||
136 | .if (\n-\i)-1 |
140 | .if (\n-\i)-1 |
137 | handler "(\i+1)",\n |
141 | handler "(\i+1)",\n |
138 | .endif |
142 | .endif |
139 | .endm |
143 | .endm |
140 | 144 | ||
141 | # keep in sync with pm.h !!! |
145 | # keep in sync with pm.h !!! |
142 | IDT_ITEMS=64 |
146 | IDT_ITEMS=64 |
143 | interrupt_handlers: |
147 | interrupt_handlers: |
144 | h_start: |
148 | h_start: |
145 | handler 0 64 |
149 | handler 0 64 |
146 | # handler 64 128 |
150 | # handler 64 128 |
147 | # handler 128 192 |
151 | # handler 128 192 |
148 | # handler 192 256 |
152 | # handler 192 256 |
149 | h_end: |
153 | h_end: |
150 | 154 | ||
151 | .data |
155 | .data |
152 | .global interrupt_handler_size |
156 | .global interrupt_handler_size |
153 | 157 | ||
154 | interrupt_handler_size: .long (h_end-h_start)/IDT_ITEMS |
158 | interrupt_handler_size: .long (h_end-h_start)/IDT_ITEMS |
155 | 159 |