[25] | 1 | /* |
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[46] | 2 | * hal_special.c - implementation of TLS API for x86_64 |
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[71] | 3 | * |
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[46] | 4 | * Copyright (c) 2017 Maxime Villard |
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[71] | 5 | * |
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[46] | 6 | * This file is part of ALMOS-MKH. |
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[25] | 7 | * |
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[46] | 8 | * ALMOS-MKH is free software; you can redistribute it and/or modify it |
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[25] | 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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[46] | 12 | * ALMOS-MKH is distributed in the hope that it will be useful, but |
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[25] | 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 | #include <hal_types.h> |
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[82] | 23 | #include <hal_apic.h> |
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[25] | 24 | #include <hal_special.h> |
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[46] | 25 | #include <hal_register.h> |
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| 26 | #include <hal_internal.h> |
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[167] | 27 | #include <hal_segmentation.h> |
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[25] | 28 | |
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[102] | 29 | #include <core.h> |
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| 30 | #include <thread.h> |
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| 31 | |
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[25] | 32 | struct thread_s; |
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| 33 | |
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[167] | 34 | tls_t cpu0 __in_kdata; |
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[46] | 35 | |
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[167] | 36 | tls_t *curcpu() |
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[46] | 37 | { |
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[167] | 38 | tls_t *cputls; |
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[46] | 39 | |
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| 40 | __asm volatile("movq %%gs:%1, %0" : |
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[167] | 41 | "=r" (cputls) : |
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[46] | 42 | "m" |
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[167] | 43 | (*(tls_t * const *)offsetof(tls_t, tls_self))); |
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| 44 | return cputls; |
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[46] | 45 | } |
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| 46 | |
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[167] | 47 | static void hal_tls_load_cpu(tls_t *cputls) |
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[46] | 48 | { |
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| 49 | wrmsr(MSR_FSBASE, 0); |
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[167] | 50 | wrmsr(MSR_GSBASE, (uint64_t)cputls); |
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[46] | 51 | wrmsr(MSR_KERNELGSBASE, 0); |
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| 52 | } |
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| 53 | |
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| 54 | void hal_tls_init_cpu0() |
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| 55 | { |
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[167] | 56 | tls_t *cputls = &cpu0; |
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[46] | 57 | |
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[167] | 58 | memset(cputls, 0, sizeof(tls_t)); |
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[46] | 59 | |
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[167] | 60 | cputls->tls_self = cputls; |
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| 61 | cputls->tls_gid = hal_lapic_gid(); |
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| 62 | cputls->tls_lid = 0; /* XXX */ |
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[46] | 63 | |
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[167] | 64 | hal_tls_load_cpu(cputls); |
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[46] | 65 | } |
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| 66 | |
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[25] | 67 | gid_t hal_get_gid() |
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| 68 | { |
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[167] | 69 | return curcpu()->tls_gid; |
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[25] | 70 | } |
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| 71 | |
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[125] | 72 | cycle_t hal_time_stamp() |
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| 73 | { |
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| 74 | return rdtsc(); |
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| 75 | } |
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| 76 | |
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[102] | 77 | uint64_t hal_get_cycles() |
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[25] | 78 | { |
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[102] | 79 | uint64_t cycles; |
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| 80 | core_t *core = CURRENT_THREAD->core; |
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| 81 | |
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| 82 | /* |
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| 83 | * Put the value of the TSC everywhere |
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| 84 | */ |
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| 85 | cycles = rdtsc(); |
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| 86 | core->time_stamp = cycles; |
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| 87 | core->cycles = cycles; |
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| 88 | |
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| 89 | return cycles; |
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[25] | 90 | } |
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| 91 | |
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[102] | 92 | struct thread_s *hal_get_current_thread() |
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[25] | 93 | { |
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[167] | 94 | return curcpu()->tls_thr; |
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[25] | 95 | } |
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| 96 | |
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| 97 | void hal_set_current_thread( struct thread_s * thread ) |
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[71] | 98 | { |
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[167] | 99 | curcpu()->tls_thr = thread; |
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[25] | 100 | } |
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| 101 | |
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[46] | 102 | /* -------------------------------------------------------------------------- */ |
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| 103 | |
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[25] | 104 | void hal_fpu_enable() |
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| 105 | { |
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[46] | 106 | x86_panic((char *)__func__); |
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[25] | 107 | } |
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| 108 | |
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| 109 | void hal_fpu_disable() |
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| 110 | { |
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[46] | 111 | x86_panic((char *)__func__); |
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[25] | 112 | } |
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| 113 | |
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| 114 | uint32_t hal_get_stack() |
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| 115 | { |
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[46] | 116 | x86_panic((char *)__func__); |
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[25] | 117 | return 0; |
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| 118 | } |
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| 119 | |
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| 120 | uint32_t hal_set_stack( void * new_val ) |
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| 121 | { |
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[46] | 122 | x86_panic((char *)__func__); |
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[25] | 123 | return 0; |
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| 124 | } |
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| 125 | |
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| 126 | uint32_t hal_get_bad_vaddr() |
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| 127 | { |
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[46] | 128 | x86_panic((char *)__func__); |
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[25] | 129 | return 0; |
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| 130 | } |
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| 131 | |
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| 132 | uint32_t hal_uncached_read( uint32_t * ptr ) |
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| 133 | { |
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[46] | 134 | x86_panic((char *)__func__); |
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[25] | 135 | return 0; |
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| 136 | } |
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| 137 | |
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| 138 | void hal_invalid_dcache_line( void * ptr ) |
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| 139 | { |
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[46] | 140 | x86_panic((char *)__func__); |
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[25] | 141 | } |
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| 142 | |
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[124] | 143 | void hal_fence() |
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[25] | 144 | { |
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[125] | 145 | mfence(); |
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[25] | 146 | } |
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| 147 | |
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| 148 | void hal_rdbar() |
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| 149 | { |
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[46] | 150 | x86_panic((char *)__func__); |
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[25] | 151 | } |
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| 152 | |
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| 153 | void hal_core_sleep() |
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| 154 | { |
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[46] | 155 | x86_panic((char *)__func__); |
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[25] | 156 | } |
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| 157 | |
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| 158 | void hal_fixed_delay( uint32_t delay ) |
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[71] | 159 | { |
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[46] | 160 | x86_panic((char *)__func__); |
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[25] | 161 | } |
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| 162 | |
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| 163 | void hal_get_mmu_excp( intptr_t * mmu_ins_excp_code, |
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| 164 | intptr_t * mmu_ins_bad_vaddr, |
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| 165 | intptr_t * mmu_dat_excp_code, |
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| 166 | intptr_t * mmu_dat_bad_vaddr ) |
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| 167 | { |
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[46] | 168 | x86_panic((char *)__func__); |
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[25] | 169 | } |
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