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| Rev | Author | Line No. | Line |
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| 426 | jermar | 1 | /* |
| 2 | * Copyright (C) 2005 Jakub Jermar |
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| 3 | * All rights reserved. |
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| 4 | * |
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| 5 | * Redistribution and use in source and binary forms, with or without |
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| 6 | * modification, are permitted provided that the following conditions |
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| 7 | * are met: |
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| 8 | * |
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| 9 | * - Redistributions of source code must retain the above copyright |
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| 10 | * notice, this list of conditions and the following disclaimer. |
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| 11 | * - Redistributions in binary form must reproduce the above copyright |
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| 12 | * notice, this list of conditions and the following disclaimer in the |
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| 13 | * documentation and/or other materials provided with the distribution. |
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| 14 | * - The name of the author may not be used to endorse or promote products |
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| 15 | * derived from this software without specific prior written permission. |
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| 16 | * |
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 27 | */ |
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| 28 | |||
| 1793 | jermar | 29 | /** @addtogroup sparc64mm |
| 1702 | cejka | 30 | * @{ |
| 31 | */ |
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| 32 | /** @file |
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| 33 | */ |
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| 34 | |||
| 426 | jermar | 35 | #include <arch/mm/page.h> |
| 1382 | decky | 36 | #include <arch/mm/tlb.h> |
| 684 | jermar | 37 | #include <genarch/mm/page_ht.h> |
| 1382 | decky | 38 | #include <mm/frame.h> |
| 1793 | jermar | 39 | #include <arch/mm/frame.h> |
| 1382 | decky | 40 | #include <bitops.h> |
| 1410 | jermar | 41 | #include <debug.h> |
| 1793 | jermar | 42 | #include <align.h> |
| 426 | jermar | 43 | |
| 44 | void page_arch_init(void) |
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| 45 | { |
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| 793 | jermar | 46 | page_mapping_operations = &ht_mapping_operations; |
| 426 | jermar | 47 | } |
| 1382 | decky | 48 | |
| 1841 | jermar | 49 | /** Map memory-mapped device into virtual memory. |
| 50 | * |
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| 51 | * So far, only DTLB is used to map devices into memory. |
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| 52 | * Chances are that there will be only a limited amount of |
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| 53 | * devices that the kernel itself needs to lock in DTLB. |
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| 54 | * |
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| 55 | * @param physaddr Physical address of the page where the |
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| 56 | * device is located. Must be at least |
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| 57 | * page-aligned. |
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| 58 | * @param size Size of the device's registers. Must not |
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| 59 | * exceed 4M and must include extra space |
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| 60 | * caused by the alignment. |
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| 61 | * |
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| 62 | * @return Virtual address of the page where the device is |
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| 63 | * mapped. |
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| 64 | */ |
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| 1780 | jermar | 65 | uintptr_t hw_map(uintptr_t physaddr, size_t size) |
| 1382 | decky | 66 | { |
| 67 | unsigned int order; |
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| 1410 | jermar | 68 | int i; |
| 69 | |||
| 70 | struct { |
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| 71 | int pagesize; |
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| 72 | size_t increment; |
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| 73 | count_t count; |
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| 74 | } sizemap[] = { |
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| 75 | { PAGESIZE_8K, 0, 1 }, /* 8K */ |
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| 76 | { PAGESIZE_8K, PAGE_SIZE, 2 }, /* 16K */ |
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| 77 | { PAGESIZE_8K, PAGE_SIZE, 4 }, /* 32K */ |
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| 78 | { PAGESIZE_64K, 0, 1}, /* 64K */ |
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| 79 | { PAGESIZE_64K, 8*PAGE_SIZE, 2 }, /* 128K */ |
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| 80 | { PAGESIZE_64K, 8*PAGE_SIZE, 4 }, /* 256K */ |
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| 81 | { PAGESIZE_512K, 0, 1 }, /* 512K */ |
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| 82 | { PAGESIZE_512K, 64*PAGE_SIZE, 2 }, /* 1M */ |
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| 83 | { PAGESIZE_512K, 64*PAGE_SIZE, 4 }, /* 2M */ |
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| 84 | { PAGESIZE_4M, 0, 1 } /* 4M */ |
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| 85 | }; |
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| 1382 | decky | 86 | |
| 1841 | jermar | 87 | ASSERT(ALIGN_UP(physaddr, PAGE_SIZE) == physaddr); |
| 1410 | jermar | 88 | ASSERT(size <= 4*1024*1024); |
| 89 | |||
| 1382 | decky | 90 | if (size <= FRAME_SIZE) |
| 91 | order = 0; |
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| 92 | else |
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| 93 | order = (fnzb32(size - 1) + 1) - FRAME_WIDTH; |
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| 1793 | jermar | 94 | |
| 95 | /* |
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| 96 | * Use virtual addresses that are beyond the limit of physical memory. |
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| 97 | * Thus, the physical address space will not be wasted by holes created |
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| 98 | * by frame_alloc(). |
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| 99 | */ |
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| 100 | ASSERT(last_frame); |
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| 101 | uintptr_t virtaddr = ALIGN_UP(last_frame, 1<<(order + FRAME_WIDTH)); |
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| 102 | last_frame = ALIGN_UP(virtaddr + size, 1<<(order + FRAME_WIDTH)); |
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| 1382 | decky | 103 | |
| 1410 | jermar | 104 | for (i = 0; i < sizemap[order].count; i++) |
| 105 | dtlb_insert_mapping(virtaddr + i*sizemap[order].increment, |
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| 106 | physaddr + i*sizemap[order].increment, |
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| 107 | sizemap[order].pagesize, true, false); |
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| 1382 | decky | 108 | |
| 109 | return virtaddr; |
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| 110 | } |
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| 1702 | cejka | 111 | |
| 1793 | jermar | 112 | /** @} |
| 1702 | cejka | 113 | */ |