[25] | 1 | /* |
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[234] | 2 | * hal_context.c - Implementation of Thread Context API for x86_64 |
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[25] | 3 | * |
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[234] | 4 | * Copyright (c) 2017 Maxime Villard |
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| 5 | * |
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[25] | 6 | * This file is part of ALMOS-MKH. |
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| 7 | * |
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[234] | 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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[234] | 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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[234] | 18 | * along with ALMOS-MKH; if not, write to the Free Software Foundation, |
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[25] | 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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| 23 | #include <memcpy.h> |
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| 24 | #include <thread.h> |
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| 25 | #include <string.h> |
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| 26 | #include <process.h> |
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| 27 | #include <printk.h> |
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| 28 | #include <vmm.h> |
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| 29 | #include <core.h> |
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| 30 | #include <cluster.h> |
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| 31 | |
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| 32 | #include <hal_context.h> |
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[193] | 33 | #include <hal_kentry.h> |
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[48] | 34 | #include <hal_internal.h> |
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[193] | 35 | #include <hal_segmentation.h> |
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[48] | 36 | |
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[193] | 37 | error_t hal_cpu_context_create(struct thread_s *thread) |
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[25] | 38 | { |
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[193] | 39 | hal_cpu_context_t *context; |
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| 40 | kmem_req_t req; |
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| 41 | |
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| 42 | /* allocate memory for cpu_context */ |
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| 43 | req.type = KMEM_CPU_CTX; |
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| 44 | req.size = sizeof(hal_cpu_context_t); |
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| 45 | req.flags = AF_KERNEL | AF_ZERO; |
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| 46 | |
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| 47 | context = (hal_cpu_context_t *)kmem_alloc(&req); |
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| 48 | if (context == NULL) |
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| 49 | return ENOMEM; |
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| 50 | |
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| 51 | /* set cpu context pointer in thread */ |
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[195] | 52 | thread->cpu_context = (void *)context; |
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[193] | 53 | |
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| 54 | /* build the context */ |
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| 55 | /* tf_gs */ |
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| 56 | /* tf_fs */ |
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| 57 | context->tf_es = GDT_FIXED_SEL(GDT_UDATA_SEL, SEL_UPL); |
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| 58 | context->tf_ds = GDT_FIXED_SEL(GDT_UDATA_SEL, SEL_UPL); |
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| 59 | context->tf_rip = (uint64_t)thread->entry_func; |
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| 60 | context->tf_rflags = PSL_USERSET; |
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| 61 | |
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| 62 | if (thread->type == THREAD_USER) { |
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| 63 | context->tf_cs = GDT_FIXED_SEL(GDT_UCODE_SEL, SEL_UPL); |
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| 64 | context->tf_rsp = ((uint64_t)thread->u_stack_base) + |
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| 65 | thread->u_stack_size; |
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| 66 | } else { |
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| 67 | context->tf_cs = GDT_FIXED_SEL(GDT_KCODE_SEL, SEL_KPL); |
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| 68 | context->tf_rsp = ((uint64_t)thread->k_stack_base) + |
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| 69 | thread->k_stack_size; |
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| 70 | } |
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| 71 | |
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[48] | 72 | return 0; |
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[25] | 73 | } |
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| 74 | |
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| 75 | error_t hal_cpu_context_copy( thread_t * dst, |
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| 76 | thread_t * src ) |
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| 77 | { |
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[48] | 78 | x86_panic((char *)__func__); |
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| 79 | return 0; |
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[25] | 80 | } |
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| 81 | |
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| 82 | void hal_cpu_context_destroy( thread_t * thread ) |
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| 83 | { |
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[48] | 84 | x86_panic((char *)__func__); |
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[25] | 85 | } |
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| 86 | |
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| 87 | error_t hal_fpu_context_create( thread_t * thread ) |
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| 88 | { |
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[48] | 89 | x86_panic((char *)__func__); |
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| 90 | return 0; |
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[25] | 91 | } |
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| 92 | |
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| 93 | error_t hal_fpu_context_copy( thread_t * dst, |
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| 94 | thread_t * src ) |
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| 95 | { |
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[48] | 96 | x86_panic((char *)__func__); |
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| 97 | return 0; |
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[25] | 98 | } |
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| 99 | |
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| 100 | void hal_fpu_context_destroy( thread_t * thread ) |
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| 101 | { |
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[48] | 102 | x86_panic((char *)__func__); |
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[25] | 103 | } |
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| 104 | |
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[311] | 105 | void hal_cpu_context_switch( thread_t * old , thread_t * new ) |
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[25] | 106 | { |
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[48] | 107 | x86_panic((char *)__func__); |
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| 108 | } |
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[25] | 109 | |
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| 110 | void hal_cpu_context_load( thread_t * thread ) |
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| 111 | { |
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[48] | 112 | x86_panic((char *)__func__); |
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[25] | 113 | } |
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| 114 | |
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| 115 | void hal_fpu_context_save( thread_t * thread ) |
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| 116 | { |
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[48] | 117 | x86_panic((char *)__func__); |
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[25] | 118 | } |
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| 119 | |
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| 120 | void hal_fpu_context_restore( thread_t * thread ) |
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| 121 | { |
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[48] | 122 | x86_panic((char *)__func__); |
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[25] | 123 | } |
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| 124 | |
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| 125 | void hal_fpu_context_dup( xptr_t dst, |
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| 126 | xptr_t src ) |
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| 127 | { |
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[48] | 128 | x86_panic((char *)__func__); |
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[25] | 129 | } |
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| 130 | |
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