1 | /* |
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2 | * hal_context.c - Implementation of Thread Context API for x86_64 |
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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 | #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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33 | #include <hal_kentry.h> |
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34 | #include <hal_internal.h> |
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35 | #include <hal_segmentation.h> |
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36 | |
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37 | error_t hal_cpu_context_create(struct thread_s *thread) |
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38 | { |
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39 | hal_trapframe_t *tf; |
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40 | hal_cpu_context_t *ctx; |
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41 | kmem_req_t req; |
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42 | |
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43 | /* allocate memory for cpu_context */ |
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44 | req.type = KMEM_CPU_CTX; |
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45 | req.size = sizeof(hal_cpu_context_t); |
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46 | req.flags = AF_KERNEL | AF_ZERO; |
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47 | |
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48 | ctx = (hal_cpu_context_t *)kmem_alloc(&req); |
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49 | if (ctx == NULL) |
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50 | return ENOMEM; |
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51 | |
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52 | /* set cpu context pointer in thread */ |
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53 | thread->cpu_context = (void *)ctx; |
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54 | |
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55 | /* |
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56 | * Build the context |
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57 | */ |
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58 | ctx->ctx_rsp0 = ((uint64_t)thread->k_stack_base) + thread->k_stack_size; |
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59 | ctx->ctx_rsp0 &= ~0xF; |
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60 | /* XXX: ctx_rsp */ |
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61 | |
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62 | /* |
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63 | * Build the trap frame |
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64 | */ |
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65 | tf = (void *)(((uint64_t)thread->k_stack_base + |
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66 | thread->k_stack_size) & ~0xF); |
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67 | tf->tf_gs = GDT_FIXED_SEL(GDT_UDATA_SEL, SEL_UPL); |
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68 | tf->tf_fs = GDT_FIXED_SEL(GDT_UDATA_SEL, SEL_UPL); |
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69 | tf->tf_es = GDT_FIXED_SEL(GDT_UDATA_SEL, SEL_UPL); |
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70 | tf->tf_ds = GDT_FIXED_SEL(GDT_UDATA_SEL, SEL_UPL); |
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71 | tf->tf_rip = (uint64_t)thread->entry_func; |
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72 | tf->tf_rflags = PSL_USERSET; |
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73 | |
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74 | if (thread->type == THREAD_USER) { |
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75 | tf->tf_cs = GDT_FIXED_SEL(GDT_UCODE_SEL, SEL_UPL); |
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76 | tf->tf_rsp = ((uint64_t)thread->u_stack_base) + |
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77 | thread->u_stack_size; |
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78 | } else { |
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79 | tf->tf_cs = GDT_FIXED_SEL(GDT_KCODE_SEL, SEL_KPL); |
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80 | tf->tf_rsp = ((uint64_t)thread->k_stack_base) + |
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81 | thread->k_stack_size; |
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82 | } |
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83 | |
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84 | return 0; |
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85 | } |
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86 | |
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87 | error_t hal_cpu_context_copy(thread_t *dst, thread_t *src) |
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88 | { |
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89 | x86_panic((char *)__func__); |
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90 | return 0; |
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91 | } |
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92 | |
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93 | void hal_cpu_context_destroy(thread_t *thread) |
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94 | { |
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95 | x86_panic((char *)__func__); |
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96 | } |
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97 | |
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98 | void hal_cpu_context_switch(thread_t *old, thread_t *new) |
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99 | { |
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100 | x86_panic((char *)__func__); |
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101 | } |
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102 | |
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103 | void hal_cpu_context_load( thread_t * thread ) |
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104 | { |
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105 | x86_panic((char *)__func__); |
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106 | } |
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107 | |
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108 | error_t hal_fpu_context_create( thread_t * thread ) |
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109 | { |
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110 | x86_panic((char *)__func__); |
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111 | return 0; |
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112 | } |
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113 | |
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114 | error_t hal_fpu_context_copy( thread_t * dst, |
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115 | thread_t * src ) |
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116 | { |
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117 | x86_panic((char *)__func__); |
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118 | return 0; |
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119 | } |
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120 | |
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121 | void hal_fpu_context_destroy( thread_t * thread ) |
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122 | { |
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123 | x86_panic((char *)__func__); |
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124 | } |
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125 | |
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126 | void hal_fpu_context_save( thread_t * thread ) |
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127 | { |
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128 | x86_panic((char *)__func__); |
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129 | } |
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130 | |
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131 | void hal_fpu_context_restore( thread_t * thread ) |
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132 | { |
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133 | x86_panic((char *)__func__); |
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134 | } |
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135 | |
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136 | void hal_fpu_context_dup( xptr_t dst, |
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137 | xptr_t src ) |
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138 | { |
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139 | x86_panic((char *)__func__); |
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140 | } |
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141 | |
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