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1 | /* |
1 | /* |
2 | * Copyright (C) 2005 Jakub Jermar |
2 | * Copyright (C) 2005 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 | /** @addtogroup sparc64mm |
29 | /** @addtogroup sparc64mm |
30 | * @{ |
30 | * @{ |
31 | */ |
31 | */ |
32 | /** @file |
32 | /** @file |
33 | */ |
33 | */ |
34 | 34 | ||
35 | #include <arch/mm/page.h> |
35 | #include <arch/mm/page.h> |
36 | #include <arch/mm/tlb.h> |
36 | #include <arch/mm/tlb.h> |
37 | #include <genarch/mm/page_ht.h> |
37 | #include <genarch/mm/page_ht.h> |
38 | #include <mm/frame.h> |
38 | #include <mm/frame.h> |
39 | #include <arch/mm/frame.h> |
39 | #include <arch/mm/frame.h> |
40 | #include <bitops.h> |
40 | #include <bitops.h> |
41 | #include <debug.h> |
41 | #include <debug.h> |
42 | #include <align.h> |
42 | #include <align.h> |
43 | 43 | ||
44 | void page_arch_init(void) |
44 | void page_arch_init(void) |
45 | { |
45 | { |
46 | page_mapping_operations = &ht_mapping_operations; |
46 | page_mapping_operations = &ht_mapping_operations; |
47 | } |
47 | } |
48 | 48 | ||
- | 49 | /** Map memory-mapped device into virtual memory. |
|
- | 50 | * |
|
- | 51 | * So far, only DTLB is used to map devices into memory. |
|
- | 52 | * Chances are that there will be only a limited amount of |
|
- | 53 | * devices that the kernel itself needs to lock in DTLB. |
|
- | 54 | * |
|
- | 55 | * @param physaddr Physical address of the page where the |
|
- | 56 | * device is located. Must be at least |
|
- | 57 | * page-aligned. |
|
- | 58 | * @param size Size of the device's registers. Must not |
|
- | 59 | * exceed 4M and must include extra space |
|
- | 60 | * caused by the alignment. |
|
- | 61 | * |
|
- | 62 | * @return Virtual address of the page where the device is |
|
- | 63 | * mapped. |
|
- | 64 | */ |
|
49 | uintptr_t hw_map(uintptr_t physaddr, size_t size) |
65 | uintptr_t hw_map(uintptr_t physaddr, size_t size) |
50 | { |
66 | { |
51 | unsigned int order; |
67 | unsigned int order; |
52 | int i; |
68 | int i; |
53 | 69 | ||
54 | struct { |
70 | struct { |
55 | int pagesize; |
71 | int pagesize; |
56 | size_t increment; |
72 | size_t increment; |
57 | count_t count; |
73 | count_t count; |
58 | } sizemap[] = { |
74 | } sizemap[] = { |
59 | { PAGESIZE_8K, 0, 1 }, /* 8K */ |
75 | { PAGESIZE_8K, 0, 1 }, /* 8K */ |
60 | { PAGESIZE_8K, PAGE_SIZE, 2 }, /* 16K */ |
76 | { PAGESIZE_8K, PAGE_SIZE, 2 }, /* 16K */ |
61 | { PAGESIZE_8K, PAGE_SIZE, 4 }, /* 32K */ |
77 | { PAGESIZE_8K, PAGE_SIZE, 4 }, /* 32K */ |
62 | { PAGESIZE_64K, 0, 1}, /* 64K */ |
78 | { PAGESIZE_64K, 0, 1}, /* 64K */ |
63 | { PAGESIZE_64K, 8*PAGE_SIZE, 2 }, /* 128K */ |
79 | { PAGESIZE_64K, 8*PAGE_SIZE, 2 }, /* 128K */ |
64 | { PAGESIZE_64K, 8*PAGE_SIZE, 4 }, /* 256K */ |
80 | { PAGESIZE_64K, 8*PAGE_SIZE, 4 }, /* 256K */ |
65 | { PAGESIZE_512K, 0, 1 }, /* 512K */ |
81 | { PAGESIZE_512K, 0, 1 }, /* 512K */ |
66 | { PAGESIZE_512K, 64*PAGE_SIZE, 2 }, /* 1M */ |
82 | { PAGESIZE_512K, 64*PAGE_SIZE, 2 }, /* 1M */ |
67 | { PAGESIZE_512K, 64*PAGE_SIZE, 4 }, /* 2M */ |
83 | { PAGESIZE_512K, 64*PAGE_SIZE, 4 }, /* 2M */ |
68 | { PAGESIZE_4M, 0, 1 } /* 4M */ |
84 | { PAGESIZE_4M, 0, 1 } /* 4M */ |
69 | }; |
85 | }; |
70 | 86 | ||
- | 87 | ASSERT(ALIGN_UP(physaddr, PAGE_SIZE) == physaddr); |
|
71 | ASSERT(size <= 4*1024*1024); |
88 | ASSERT(size <= 4*1024*1024); |
72 | 89 | ||
73 | if (size <= FRAME_SIZE) |
90 | if (size <= FRAME_SIZE) |
74 | order = 0; |
91 | order = 0; |
75 | else |
92 | else |
76 | order = (fnzb32(size - 1) + 1) - FRAME_WIDTH; |
93 | order = (fnzb32(size - 1) + 1) - FRAME_WIDTH; |
77 | 94 | ||
78 | /* |
95 | /* |
79 | * Use virtual addresses that are beyond the limit of physical memory. |
96 | * Use virtual addresses that are beyond the limit of physical memory. |
80 | * Thus, the physical address space will not be wasted by holes created |
97 | * Thus, the physical address space will not be wasted by holes created |
81 | * by frame_alloc(). |
98 | * by frame_alloc(). |
82 | */ |
99 | */ |
83 | ASSERT(last_frame); |
100 | ASSERT(last_frame); |
84 | uintptr_t virtaddr = ALIGN_UP(last_frame, 1<<(order + FRAME_WIDTH)); |
101 | uintptr_t virtaddr = ALIGN_UP(last_frame, 1<<(order + FRAME_WIDTH)); |
85 | last_frame = ALIGN_UP(virtaddr + size, 1<<(order + FRAME_WIDTH)); |
102 | last_frame = ALIGN_UP(virtaddr + size, 1<<(order + FRAME_WIDTH)); |
86 | 103 | ||
87 | for (i = 0; i < sizemap[order].count; i++) |
104 | for (i = 0; i < sizemap[order].count; i++) |
88 | dtlb_insert_mapping(virtaddr + i*sizemap[order].increment, |
105 | dtlb_insert_mapping(virtaddr + i*sizemap[order].increment, |
89 | physaddr + i*sizemap[order].increment, |
106 | physaddr + i*sizemap[order].increment, |
90 | sizemap[order].pagesize, true, false); |
107 | sizemap[order].pagesize, true, false); |
91 | 108 | ||
92 | return virtaddr; |
109 | return virtaddr; |
93 | } |
110 | } |
94 | 111 | ||
95 | /** @} |
112 | /** @} |
96 | */ |
113 | */ |
97 | 114 |