| 1 | /*
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| 2 | * Copyright (c) 2006 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 ia64mm
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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/as.h>
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| 36 | #include <arch/mm/asid.h>
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| 37 | #include <arch/mm/page.h>
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| 38 | #include <genarch/mm/as_ht.h>
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| 39 | #include <genarch/mm/asid_fifo.h>
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| 40 | #include <mm/asid.h>
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| 41 | #include <arch.h>
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| 42 | #include <arch/barrier.h>
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| 43 | #include <synch/spinlock.h>
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| 44 |
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| 45 | /** Architecture dependent address space init. */
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| 46 | void as_arch_init(void)
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| 47 | {
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| 48 | as_operations = &as_ht_operations;
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| 49 | asid_fifo_init();
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| 50 | }
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| 51 |
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| 52 | /** Prepare registers for switching to another address space.
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| 53 | *
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| 54 | * @param as Address space.
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| 55 | */
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| 56 | void as_install_arch(as_t *as)
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| 57 | {
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| 58 | ipl_t ipl;
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| 59 | region_register rr;
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| 60 | int i;
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| 61 |
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| 62 | ipl = interrupts_disable();
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| 63 | spinlock_lock(&as->lock);
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| 64 |
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| 65 | ASSERT(as->asid != ASID_INVALID);
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| 66 |
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| 67 | /*
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| 68 | * Load respective ASID (7 consecutive RIDs) to
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| 69 | * region registers.
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| 70 | */
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| 71 | for (i = 0; i < REGION_REGISTERS; i++) {
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| 72 | if (i == VRN_KERNEL)
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| 73 | continue;
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| 74 |
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| 75 | rr.word = rr_read(i);
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| 76 | rr.map.ve = false; /* disable VHPT walker */
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| 77 | rr.map.rid = ASID2RID(as->asid, i);
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| 78 | rr.map.ps = PAGE_WIDTH;
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| 79 | rr_write(i, rr.word);
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| 80 | }
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| 81 | srlz_d();
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| 82 | srlz_i();
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| 83 |
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| 84 | spinlock_unlock(&as->lock);
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| 85 | interrupts_restore(ipl);
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| 86 | }
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| 87 |
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| 88 | /** @}
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| 89 | */
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