Rev 2361 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 2128 | jermar | 1 | /* |
| 2238 | kebrt | 2 | * Copyright (c) 2007 Pavel Jancik, Michal Kebrt |
| 2128 | jermar | 3 | * All rights reserved. |
| 4 | * |
||
| 5 | * Redistribution and use in source and binary forms, with or without |
||
| 6 | * modification, are permitted provided that the following conditions |
||
| 7 | * are met: |
||
| 8 | * |
||
| 9 | * - Redistributions of source code must retain the above copyright |
||
| 10 | * notice, this list of conditions and the following disclaimer. |
||
| 11 | * - Redistributions in binary form must reproduce the above copyright |
||
| 12 | * notice, this list of conditions and the following disclaimer in the |
||
| 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 |
||
| 15 | * derived from this software without specific prior written permission. |
||
| 16 | * |
||
| 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 |
||
| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
||
| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
||
| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
||
| 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 |
||
| 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 |
||
| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
||
| 27 | */ |
||
| 28 | |||
| 29 | /** @addtogroup arm32mm |
||
| 30 | * @{ |
||
| 31 | */ |
||
| 32 | /** @file |
||
| 33 | */ |
||
| 34 | |||
| 35 | #include <arch/mm/page.h> |
||
| 36 | #include <genarch/mm/page_pt.h> |
||
| 37 | #include <mm/page.h> |
||
| 2182 | jancik | 38 | #include <align.h> |
| 39 | #include <config.h> |
||
| 2258 | jancik | 40 | #include <arch/exception.h> |
| 41 | #include <typedefs.h> |
||
| 42 | #include <arch/types.h> |
||
| 43 | #include <interrupt.h> |
||
| 2352 | kebrt | 44 | #include <arch/mm/frame.h> |
| 2258 | jancik | 45 | |
| 2128 | jermar | 46 | |
| 2258 | jancik | 47 | /** |
| 48 | * Initializes kernel adress space page tables, sets abourts exceptions vectors |
||
| 49 | */ |
||
| 2128 | jermar | 50 | void page_arch_init(void) |
| 51 | { |
||
| 2238 | kebrt | 52 | uintptr_t cur; |
| 2182 | jancik | 53 | int flags; |
| 54 | |||
| 2128 | jermar | 55 | page_mapping_operations = &pt_mapping_operations; |
| 2182 | jancik | 56 | |
| 57 | flags = PAGE_CACHEABLE; |
||
| 2238 | kebrt | 58 | |
| 2290 | kebrt | 59 | // PA2KA(identity) mapping for all frames until last_frame |
| 2243 | kebrt | 60 | for (cur = 0; cur < last_frame; cur += FRAME_SIZE) { |
| 61 | page_mapping_insert(AS_KERNEL, PA2KA(cur), cur, flags); |
||
| 62 | } |
||
| 2270 | jancik | 63 | |
| 2290 | kebrt | 64 | // create mapping for exception table at high offset |
| 2270 | jancik | 65 | #ifdef HIGH_EXCEPTION_VECTORS |
| 2361 | jancik | 66 | /* Note: this mapping cann't be done by hw_map because fixed |
| 67 | exception vector is stored at fixed virtual address |
||
| 68 | reserve frame for exception table |
||
| 69 | */ |
||
| 2290 | kebrt | 70 | void* virtaddr = frame_alloc(ONE_FRAME, FRAME_KA); |
| 71 | page_mapping_insert(AS_KERNEL, EXC_BASE_ADDRESS, KA2PA(virtaddr), flags); |
||
| 2361 | jancik | 72 | #else |
| 73 | #error "Only high eception vector supported now" |
||
| 2270 | jancik | 74 | #endif |
| 2243 | kebrt | 75 | |
| 2263 | kebrt | 76 | as_switch(NULL, AS_KERNEL); |
| 2352 | kebrt | 77 | |
| 78 | boot_page_table_free(); |
||
| 2128 | jermar | 79 | } |
| 80 | |||
| 2258 | jancik | 81 | /** |
| 82 | * Map device into kernel space. |
||
| 83 | * |
||
| 84 | * This function adds mapping of physical address that is read/write only |
||
| 85 | * from kernel and not bufferable. |
||
| 86 | * |
||
| 2362 | jancik | 87 | * @param physaddr Physical addres where device is connected |
| 88 | * @param size Length of area where device is present |
||
| 89 | * @return Virtual address where device will be accessable |
||
| 2258 | jancik | 90 | */ |
| 2128 | jermar | 91 | uintptr_t hw_map(uintptr_t physaddr, size_t size) |
| 92 | { |
||
| 2290 | kebrt | 93 | if (last_frame + ALIGN_UP(size, PAGE_SIZE) > KA2PA(KERNEL_ADDRESS_SPACE_END_ARCH)) { |
| 2258 | jancik | 94 | panic("Unable to map physical memory %p (%d bytes)", physaddr, size) |
| 2290 | kebrt | 95 | } |
| 2258 | jancik | 96 | |
| 97 | uintptr_t virtaddr = PA2KA(last_frame); |
||
| 98 | pfn_t i; |
||
| 2290 | kebrt | 99 | for (i = 0; i < ADDR2PFN(ALIGN_UP(size, PAGE_SIZE)); i++) { |
| 100 | page_mapping_insert(AS_KERNEL, virtaddr + PFN2ADDR(i), physaddr + PFN2ADDR(i), |
||
| 101 | PAGE_NOT_CACHEABLE | PAGE_READ | PAGE_WRITE | PAGE_KERNEL); |
||
| 102 | } |
||
| 2258 | jancik | 103 | |
| 104 | last_frame = ALIGN_UP(last_frame + size, FRAME_SIZE); |
||
| 105 | return virtaddr; |
||
| 2128 | jermar | 106 | } |
| 107 | |||
| 2258 | jancik | 108 | |
| 2128 | jermar | 109 | /** @} |
| 110 | */ |
||
| 2182 | jancik | 111 |