Rev 178 | Rev 206 | Go to most recent revision | Only display areas with differences | Ignore whitespace | Details | Blame | Last modification | View Log | RSS feed
Rev 178 | Rev 188 | ||
---|---|---|---|
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 | #include <arch/pm.h> |
29 | #include <arch/pm.h> |
30 | #include <arch/mm/page.h> |
30 | #include <arch/mm/page.h> |
31 | #include <arch/types.h> |
31 | #include <arch/types.h> |
32 | 32 | ||
33 | 33 | ||
34 | /* |
34 | /* |
35 | * There is no segmentation in long mode so we set up flat mode. In this |
35 | * There is no segmentation in long mode so we set up flat mode. In this |
36 | * mode, we use, for each privilege level, two segments spanning the |
36 | * mode, we use, for each privilege level, two segments spanning the |
37 | * whole memory. One is for code and one is for data. |
37 | * whole memory. One is for code and one is for data. |
38 | */ |
38 | */ |
39 | 39 | ||
40 | struct descriptor gdt[GDT_ITEMS] = { |
40 | struct descriptor gdt[GDT_ITEMS] = { |
41 | /* NULL descriptor */ |
41 | /* NULL descriptor */ |
42 | { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, |
42 | { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, |
43 | /* KTEXT descriptor */ |
43 | /* KTEXT descriptor */ |
44 | { .limit_0_15 = 0xffff, |
44 | { .limit_0_15 = 0xffff, |
45 | .base_0_15 = 0, |
45 | .base_0_15 = 0, |
46 | .base_16_23 = 0, |
46 | .base_16_23 = 0, |
47 | .access = AR_PRESENT | AR_CODE | DPL_KERNEL, |
47 | .access = AR_PRESENT | AR_CODE | DPL_KERNEL | AR_READABLE , |
48 | .limit_16_19 = 0xf, |
48 | .limit_16_19 = 0xf, |
49 | .available = 0, |
49 | .available = 0, |
50 | .longmode = 1, |
50 | .longmode = 1, |
51 | .special = 0, |
51 | .special = 0, |
52 | .granularity = 1, |
52 | .granularity = 1, |
53 | .base_24_31 = 0 }, |
53 | .base_24_31 = 0 }, |
54 | /* KDATA descriptor */ |
54 | /* KDATA descriptor */ |
55 | { .limit_0_15 = 0xffff, |
55 | { .limit_0_15 = 0xffff, |
56 | .base_0_15 = 0, |
56 | .base_0_15 = 0, |
57 | .base_16_23 = 0, |
57 | .base_16_23 = 0, |
58 | .access = AR_PRESENT | AR_DATA | AR_WRITABLE | DPL_KERNEL, |
58 | .access = AR_PRESENT | AR_DATA | AR_WRITABLE | DPL_KERNEL, |
59 | .limit_16_19 = 0xf, |
59 | .limit_16_19 = 0xf, |
60 | .available = 0, |
60 | .available = 0, |
61 | .longmode = 0, |
61 | .longmode = 0, |
62 | .special = 0, |
62 | .special = 0, |
63 | .granularity = 0, |
63 | .granularity = 1, |
64 | .base_24_31 = 0 }, |
64 | .base_24_31 = 0 }, |
65 | /* UTEXT descriptor */ |
65 | /* UTEXT descriptor */ |
66 | { .limit_0_15 = 0xffff, |
66 | { .limit_0_15 = 0xffff, |
67 | .base_0_15 = 0, |
67 | .base_0_15 = 0, |
68 | .base_16_23 = 0, |
68 | .base_16_23 = 0, |
69 | .access = AR_PRESENT | AR_CODE | DPL_USER, |
69 | .access = AR_PRESENT | AR_CODE | DPL_USER, |
70 | .limit_16_19 = 0xf, |
70 | .limit_16_19 = 0xf, |
71 | .available = 0, |
71 | .available = 0, |
72 | .longmode = 1, |
72 | .longmode = 1, |
73 | .special = 0, |
73 | .special = 0, |
74 | .granularity = 0, |
74 | .granularity = 0, |
75 | .base_24_31 = 0 }, |
75 | .base_24_31 = 0 }, |
76 | /* UDATA descriptor */ |
76 | /* UDATA descriptor */ |
77 | { .limit_0_15 = 0xffff, |
77 | { .limit_0_15 = 0xffff, |
78 | .base_0_15 = 0, |
78 | .base_0_15 = 0, |
79 | .base_16_23 = 0, |
79 | .base_16_23 = 0, |
80 | .access = AR_PRESENT | AR_DATA | AR_WRITABLE | DPL_USER, |
80 | .access = AR_PRESENT | AR_DATA | AR_WRITABLE | DPL_USER, |
81 | .limit_16_19 = 0xf, |
81 | .limit_16_19 = 0xf, |
82 | .available = 0, |
82 | .available = 0, |
83 | .longmode = 0, |
83 | .longmode = 0, |
84 | .special = 1, |
84 | .special = 1, |
85 | .granularity = 1, |
85 | .granularity = 1, |
86 | .base_24_31 = 0 }, |
86 | .base_24_31 = 0 }, |
- | 87 | /* KTEXT 16-bit protected */ |
|
- | 88 | { .limit_0_15 = 0xffff, |
|
- | 89 | .base_0_15 = 0, |
|
- | 90 | .base_16_23 = 0, |
|
- | 91 | .access = AR_PRESENT | AR_CODE | DPL_KERNEL | AR_READABLE, |
|
- | 92 | .limit_16_19 = 0xf, |
|
- | 93 | .available = 0, |
|
- | 94 | .longmode = 0, |
|
- | 95 | .special = 0, |
|
- | 96 | .granularity = 1, |
|
- | 97 | .base_24_31 = 0 }, |
|
87 | /* TSS descriptor - set up will be completed later */ |
98 | /* TSS descriptor - set up will be completed later */ |
88 | { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 } |
99 | { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 } |
89 | }; |
100 | }; |
90 | 101 | ||
91 | struct idescriptor idt[IDT_ITEMS]; |
102 | struct idescriptor idt[IDT_ITEMS]; |
92 | 103 | ||
93 | static struct tss tss; |
104 | static struct tss tss; |
94 | 105 | ||
95 | /* gdtr is changed by kmp before next CPU is initialized */ |
106 | /* Does not compile correctly if it does not exist */ |
96 | struct ptr_16_32 gdtr __attribute__ ((section ("K_DATA_START"))) = { .limit = sizeof(gdt) }; |
- | |
97 | //struct ptr_16_32 gdtr __attribute__ ((section ("K_DATA_START"))) = { .limit = sizeof(gdt), .base = KA2PA((__address) gdt) }; |
- | |
98 | struct ptr_16_32 idtr __attribute__ ((section ("K_DATA_START"))) = { .limit = sizeof(idt) }; |
107 | int __attribute__ ((section ("K_DATA_START"))) __fake; |
99 | 108 |