source: trunk/hal/x86_64/core/hal_special.c @ 167

Last change on this file since 167 was 167, checked in by max@…, 5 years ago

define the TLS in hal_segmentation.h

File size: 3.0 KB
Line 
1/*
2 * hal_special.c - implementation of TLS API for x86_64
3 *
4 * Copyright (c) 2017 Maxime Villard
5 *
6 * This file is part of ALMOS-MKH.
7 *
8 * ALMOS-MKH is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; version 2.0 of the License.
11 *
12 * ALMOS-MKH is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15 * General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with ALMOS-MKH.; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22#include <hal_types.h>
23#include <hal_apic.h>
24#include <hal_special.h>
25#include <hal_register.h>
26#include <hal_internal.h>
27#include <hal_segmentation.h>
28
29#include <core.h>
30#include <thread.h>
31
32struct thread_s;
33
34tls_t cpu0 __in_kdata;
35
36tls_t *curcpu()
37{
38        tls_t *cputls;
39
40        __asm volatile("movq %%gs:%1, %0" :
41            "=r" (cputls) :
42            "m"
43            (*(tls_t * const *)offsetof(tls_t, tls_self)));
44        return cputls;
45}
46
47static void hal_tls_load_cpu(tls_t *cputls)
48{
49        wrmsr(MSR_FSBASE, 0);
50        wrmsr(MSR_GSBASE, (uint64_t)cputls);
51        wrmsr(MSR_KERNELGSBASE, 0);
52}
53
54void hal_tls_init_cpu0()
55{
56        tls_t *cputls = &cpu0;
57
58        memset(cputls, 0, sizeof(tls_t));
59
60        cputls->tls_self = cputls;
61        cputls->tls_gid = hal_lapic_gid();
62        cputls->tls_lid = 0; /* XXX */
63
64        hal_tls_load_cpu(cputls);
65}
66
67gid_t hal_get_gid()
68{
69        return curcpu()->tls_gid;
70}
71
72cycle_t hal_time_stamp()
73{
74        return rdtsc();
75}
76
77uint64_t hal_get_cycles()
78{
79        uint64_t cycles;
80        core_t *core = CURRENT_THREAD->core;
81
82        /*
83         * Put the value of the TSC everywhere
84         */
85        cycles = rdtsc();
86        core->time_stamp = cycles;
87        core->cycles = cycles;
88
89        return cycles;
90}
91
92struct thread_s *hal_get_current_thread()
93{
94        return curcpu()->tls_thr;
95}
96
97void hal_set_current_thread( struct thread_s * thread )
98{
99        curcpu()->tls_thr = thread;
100}
101
102/* -------------------------------------------------------------------------- */
103
104void hal_fpu_enable()
105{
106        x86_panic((char *)__func__);
107}
108
109void hal_fpu_disable()
110{
111        x86_panic((char *)__func__);
112}
113
114uint32_t hal_get_stack()
115{
116        x86_panic((char *)__func__);
117        return 0;
118}
119
120uint32_t hal_set_stack( void * new_val )
121{
122        x86_panic((char *)__func__);
123        return 0;
124}
125
126uint32_t hal_get_bad_vaddr()
127{
128        x86_panic((char *)__func__);
129        return 0;
130}
131
132uint32_t hal_uncached_read( uint32_t * ptr )
133{
134        x86_panic((char *)__func__);
135        return 0;
136}
137
138void hal_invalid_dcache_line( void * ptr )
139{
140        x86_panic((char *)__func__);
141}
142
143void hal_fence()
144{
145        mfence();
146}
147
148void hal_rdbar()
149{
150        x86_panic((char *)__func__);
151}
152
153void hal_core_sleep()
154{
155        x86_panic((char *)__func__);
156}
157
158void hal_fixed_delay( uint32_t delay )
159{
160        x86_panic((char *)__func__);
161}
162
163void hal_get_mmu_excp( intptr_t * mmu_ins_excp_code,
164                       intptr_t * mmu_ins_bad_vaddr,
165                       intptr_t * mmu_dat_excp_code,
166                       intptr_t * mmu_dat_bad_vaddr )
167{
168        x86_panic((char *)__func__);
169}
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