| 1 | /*
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| 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 |
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| 29 | /** @addtogroup kernel_sparc64_mm
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| 30 | * @{
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| 31 | */
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| 32 | /** @file
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| 33 | */
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| 34 |
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| 35 | #include <arch/mm/frame.h>
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| 36 | #include <mm/frame.h>
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| 37 | #include <arch/boot/boot.h>
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| 38 | #include <typedefs.h>
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| 39 | #include <config.h>
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| 40 | #include <align.h>
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| 41 | #include <macros.h>
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| 42 |
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| 43 | /** Create memory zones according to information stored in memmap.
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| 44 | *
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| 45 | * Walk the memory map and create frame zones according to it.
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| 46 | */
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| 47 | static void frame_common_arch_init(bool low)
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| 48 | {
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| 49 | unsigned int i;
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| 50 |
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| 51 | for (i = 0; i < memmap.cnt; i++) {
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| 52 | uintptr_t base;
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| 53 | size_t size;
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| 54 |
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| 55 | /*
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| 56 | * The memmap is created by HelenOS boot loader.
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| 57 | * It already contains no holes.
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| 58 | */
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| 59 |
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| 60 | /* To be safe, make the available zone possibly smaller */
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| 61 | base = ALIGN_UP((uintptr_t) memmap.zones[i].start, FRAME_SIZE);
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| 62 | size = ALIGN_DOWN(memmap.zones[i].size -
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| 63 | (base - ((uintptr_t) memmap.zones[i].start)), FRAME_SIZE);
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| 64 |
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| 65 | if (!frame_adjust_zone_bounds(low, &base, &size))
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| 66 | continue;
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| 67 |
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| 68 | pfn_t confdata;
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| 69 | pfn_t pfn = ADDR2PFN(base);
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| 70 | size_t count = SIZE2FRAMES(size);
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| 71 |
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| 72 | if (low) {
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| 73 | confdata = pfn;
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| 74 | if (confdata == ADDR2PFN(KA2PA(PFN2ADDR(0))))
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| 75 | confdata = ADDR2PFN(KA2PA(PFN2ADDR(2)));
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| 76 |
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| 77 | zone_create(pfn, count, confdata,
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| 78 | ZONE_AVAILABLE | ZONE_LOWMEM);
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| 79 | } else {
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| 80 | confdata = zone_external_conf_alloc(count);
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| 81 | if (confdata != 0)
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| 82 | zone_create(pfn, count, confdata,
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| 83 | ZONE_AVAILABLE | ZONE_HIGHMEM);
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| 84 | }
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| 85 | }
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| 86 | }
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| 87 |
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| 88 | void frame_low_arch_init(void)
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| 89 | {
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| 90 | if (config.cpu_active > 1)
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| 91 | return;
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| 92 |
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| 93 | frame_common_arch_init(true);
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| 94 |
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| 95 | /*
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| 96 | * On sparc64, physical memory can start on a non-zero address.
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| 97 | * The generic frame_init() only marks PFN 0 as not free, so we
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| 98 | * must mark the physically first frame not free explicitly
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| 99 | * here, no matter what is its address.
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| 100 | */
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| 101 | frame_mark_unavailable(ADDR2PFN(KA2PA(PFN2ADDR(0))), 1);
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| 102 |
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| 103 | /* PA2KA will work only on low-memory. */
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| 104 | end_of_identity = PA2KA(config.physmem_end - FRAME_SIZE) + PAGE_SIZE;
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| 105 | }
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| 106 |
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| 107 | void frame_high_arch_init(void)
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| 108 | {
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| 109 | if (config.cpu_active > 1)
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| 110 | return;
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| 111 |
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| 112 | frame_common_arch_init(false);
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| 113 | }
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| 114 |
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| 115 | /** @}
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| 116 | */
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