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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 3835 | rimsky | 1 | # |
| 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 | |||
| 29 | /** |
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| 30 | * @file |
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| 31 | * @brief MMU trap handlers that do not fit into the trap table. |
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| 32 | */ |
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| 33 | |||
| 34 | .register %g2, #scratch |
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| 35 | .register %g3, #scratch |
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| 36 | |||
| 37 | .text |
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| 38 | |||
| 39 | #include <arch/trap/sun4v/mmu.h> |
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| 40 | #include <arch/trap/trap_table.h> |
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| 41 | #include <arch/sun4v/regdef.h> |
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| 42 | |||
| 43 | /* |
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| 44 | * Install mapping for the kernel. The mapping obeys this formula: |
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| 45 | * virtual address = real address + start of physical memory |
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| 46 | * |
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| 47 | * The routine expects the following values of registers: |
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| 48 | * %g1 virtual address that has caused the miss |
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| 49 | */ |
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| 50 | .global install_identity_mapping |
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| 51 | install_identity_mapping: |
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| 52 | |||
| 53 | /* output registers mustn't be clobbered during the hypercall, SAVE is too risky */ |
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| 54 | mov %o0, %g3 |
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| 55 | mov %o1, %g4 |
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| 56 | mov %o2, %g5 |
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| 57 | mov %o3, %g6 |
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| 58 | |||
| 59 | /* install mapping for kernel */ |
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| 60 | mov %g1, %o0 |
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| 61 | set 0, %o1 ! set context |
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| 62 | setx kernel_8k_tlb_data_template, %g1, %g2 ! g2 <= template of TTE Data |
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| 63 | ldx [%g2], %g2 ! read the TTE Data template |
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| 64 | add %g2, %o0, %o2 ! template + VA = TTE Data entry |
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| 65 | set MMU_FLAG_DTLB, %o3 ! map in DTLB only |
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| 66 | ta MMU_MAP_ADDR |
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| 67 | |||
| 68 | /* restore output registers */ |
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| 69 | mov %g6, %o3 |
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| 70 | mov %g5, %o2 |
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| 71 | mov %g4, %o1 |
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| 72 | mov %g3, %o0 |
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| 73 | |||
| 74 | retry |