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| 1 | /* |
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| 2 | * hal_cpu.S - Miscellaneous CPU functions |
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| 3 | * |
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| 4 | * Copyright (c) 2017 Maxime Villard |
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| 5 | * |
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| 6 | * This file is part of ALMOS-MKH. |
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| 7 | * |
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| 8 | * ALMOS-MKH is free software; you can redistribute it and/or modify it |
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| 9 | * under the terms of the GNU General Public License as published by |
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| 10 | * the Free Software Foundation; version 2.0 of the License. |
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| 11 | * |
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| 12 | * ALMOS-MKH is distributed in the hope that it will be useful, but |
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| 13 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 15 | * General Public License for more details. |
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| 16 | * |
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| 17 | * You should have received a copy of the GNU General Public License |
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| 18 | * along with ALMOS-MKH.; if not, write to the Free Software Foundation, |
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| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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| 20 | */ |
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| 21 | |
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| 22 | #define x86_ASM |
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| 23 | #include <hal_boot.h> |
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| 24 | |
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| 25 | ASM_ENTRY(lgdt) |
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| 26 | lgdt (%rdi) |
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| 27 | ret |
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| 28 | |
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| 29 | ASM_ENTRY(lidt) |
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| 30 | lidt (%rdi) |
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| 31 | ret |
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| 32 | |
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| 33 | ASM_ENTRY(ltr) |
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| 34 | ltr %di |
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| 35 | ret |
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| 36 | |
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| 37 | ASM_ENTRY(invlpg) |
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| 38 | invlpg (%rdi) |
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| 39 | ret |
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| 40 | |
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| 41 | ASM_ENTRY(rdmsr) |
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| 42 | movq %rdi,%rcx |
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| 43 | xorq %rax,%rax |
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| 44 | rdmsr |
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| 45 | shlq $32,%rdx |
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| 46 | orq %rdx,%rax |
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| 47 | ret |
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| 48 | |
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| 49 | ASM_ENTRY(wrmsr) |
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| 50 | movq %rdi,%rcx |
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| 51 | movq %rsi,%rax |
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| 52 | movq %rsi,%rdx |
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| 53 | shrq $32,%rdx |
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| 54 | wrmsr |
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| 55 | ret |
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| 56 | |
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