Rev 3790 | Rev 3940 | Go to most recent revision | Only display areas with differences | Ignore whitespace | Details | Blame | Last modification | View Log | RSS feed
Rev 3790 | Rev 3908 | ||
---|---|---|---|
1 | /* |
1 | /* |
2 | * Copyright (c) 2007 Pavel Jancik, Michal Kebrt |
2 | * Copyright (c) 2007 Pavel Jancik, Michal Kebrt |
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 arm32mm |
29 | /** @addtogroup arm32mm |
30 | * @{ |
30 | * @{ |
31 | */ |
31 | */ |
32 | /** @file |
32 | /** @file |
33 | * @brief Paging related functions. |
33 | * @brief Paging related functions. |
34 | */ |
34 | */ |
35 | 35 | ||
36 | #include <arch/mm/page.h> |
36 | #include <arch/mm/page.h> |
37 | #include <genarch/mm/page_pt.h> |
37 | #include <genarch/mm/page_pt.h> |
38 | #include <mm/page.h> |
38 | #include <mm/page.h> |
39 | #include <align.h> |
39 | #include <align.h> |
40 | #include <config.h> |
40 | #include <config.h> |
41 | #include <arch/exception.h> |
41 | #include <arch/exception.h> |
42 | #include <typedefs.h> |
42 | #include <typedefs.h> |
43 | #include <arch/types.h> |
43 | #include <arch/types.h> |
44 | #include <interrupt.h> |
44 | #include <interrupt.h> |
45 | #include <arch/mm/frame.h> |
45 | #include <arch/mm/frame.h> |
46 | 46 | ||
47 | /** Initializes page tables. |
47 | /** Initializes page tables. |
48 | * |
48 | * |
49 | * 1:1 virtual-physical mapping is created in kernel address space. Mapping |
49 | * 1:1 virtual-physical mapping is created in kernel address space. Mapping |
50 | * for table with exception vectors is also created. |
50 | * for table with exception vectors is also created. |
51 | */ |
51 | */ |
52 | void page_arch_init(void) |
52 | void page_arch_init(void) |
53 | { |
53 | { |
54 | uintptr_t cur; |
54 | uintptr_t cur; |
55 | int flags; |
55 | int flags; |
56 | 56 | ||
57 | page_mapping_operations = &pt_mapping_operations; |
57 | page_mapping_operations = &pt_mapping_operations; |
58 | 58 | ||
59 | flags = PAGE_CACHEABLE; |
59 | flags = PAGE_CACHEABLE; |
60 | 60 | ||
61 | /* PA2KA(identity) mapping for all frames until last_frame */ |
61 | /* PA2KA(identity) mapping for all frames until last_frame */ |
62 | for (cur = 0; cur < last_frame; cur += FRAME_SIZE) { |
62 | for (cur = 0; cur < last_frame; cur += FRAME_SIZE) { |
63 | page_mapping_insert(AS_KERNEL, PA2KA(cur), cur, flags); |
63 | page_mapping_insert(AS_KERNEL, PA2KA(cur), cur, flags); |
64 | } |
64 | } |
65 | 65 | ||
66 | /* create mapping for exception table at high offset */ |
66 | /* create mapping for exception table at high offset */ |
67 | #ifdef HIGH_EXCEPTION_VECTORS |
67 | #ifdef HIGH_EXCEPTION_VECTORS |
68 | void *virtaddr = frame_alloc(ONE_FRAME, FRAME_KA); |
68 | void *virtaddr = frame_alloc(ONE_FRAME, FRAME_KA); |
69 | page_mapping_insert(AS_KERNEL, EXC_BASE_ADDRESS, KA2PA(virtaddr), flags); |
69 | page_mapping_insert(AS_KERNEL, EXC_BASE_ADDRESS, KA2PA(virtaddr), flags); |
70 | #else |
70 | #else |
71 | #error "Only high exception vector supported now" |
71 | #error "Only high exception vector supported now" |
72 | #endif |
72 | #endif |
73 | 73 | ||
74 | as_switch(NULL, AS_KERNEL); |
74 | as_switch(NULL, AS_KERNEL); |
75 | 75 | ||
76 | boot_page_table_free(); |
76 | boot_page_table_free(); |
77 | } |
77 | } |
78 | 78 | ||
79 | /** Maps device into the kernel space. |
79 | /** Maps device into the kernel space. |
80 | * |
80 | * |
81 | * Maps physical address of device into kernel virtual address space (so it can |
81 | * Maps physical address of device into kernel virtual address space (so it can |
82 | * be accessed only by kernel through virtual address). |
82 | * be accessed only by kernel through virtual address). |
83 | * |
83 | * |
84 | * @param physaddr Physical address where device is connected. |
84 | * @param physaddr Physical address where device is connected. |
85 | * @param size Length of area where device is present. |
85 | * @param size Length of area where device is present. |
86 | * |
86 | * |
87 | * @return Virtual address where device will be accessible. |
87 | * @return Virtual address where device will be accessible. |
88 | */ |
88 | */ |
89 | uintptr_t hw_map(uintptr_t physaddr, size_t size) |
89 | uintptr_t hw_map(uintptr_t physaddr, size_t size) |
90 | { |
90 | { |
91 | if (last_frame + ALIGN_UP(size, PAGE_SIZE) > |
91 | if (last_frame + ALIGN_UP(size, PAGE_SIZE) > |
92 | KA2PA(KERNEL_ADDRESS_SPACE_END_ARCH)) { |
92 | KA2PA(KERNEL_ADDRESS_SPACE_END_ARCH)) { |
93 | panic("Unable to map physical memory %p (%d bytes).", |
93 | panic("Unable to map physical memory %p (%d bytes).", |
94 | physaddr, size) |
94 | physaddr, size) |
95 | } |
95 | } |
96 | 96 | ||
97 | uintptr_t virtaddr = PA2KA(last_frame); |
97 | uintptr_t virtaddr = PA2KA(last_frame); |
98 | pfn_t i; |
98 | pfn_t i; |
99 | for (i = 0; i < ADDR2PFN(ALIGN_UP(size, PAGE_SIZE)); i++) { |
99 | for (i = 0; i < ADDR2PFN(ALIGN_UP(size, PAGE_SIZE)); i++) { |
100 | page_mapping_insert(AS_KERNEL, virtaddr + PFN2ADDR(i), |
100 | page_mapping_insert(AS_KERNEL, virtaddr + PFN2ADDR(i), |
101 | physaddr + PFN2ADDR(i), |
101 | physaddr + PFN2ADDR(i), |
102 | PAGE_NOT_CACHEABLE | PAGE_READ | PAGE_WRITE | PAGE_KERNEL); |
102 | PAGE_NOT_CACHEABLE | PAGE_READ | PAGE_WRITE | PAGE_KERNEL); |
103 | } |
103 | } |
104 | 104 | ||
105 | last_frame = ALIGN_UP(last_frame + size, FRAME_SIZE); |
105 | last_frame = ALIGN_UP(last_frame + size, FRAME_SIZE); |
106 | return virtaddr; |
106 | return virtaddr; |
107 | } |
107 | } |
108 | 108 | ||
- | 109 | void hw_area(uintptr_t *physaddr, pfn_t *frames) |
|
- | 110 | { |
|
- | 111 | *physaddr = end_frame; |
|
- | 112 | *frames = ADDR2PFN(0xffffffff - end_frame); |
|
- | 113 | } |
|
- | 114 | ||
109 | /** @} |
115 | /** @} |
110 | */ |
116 | */ |
111 | 117 |