source: mainline/kernel/arch/arm32/src/arm32.c@ 86018c1

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since 86018c1 was 3063d56, checked in by Jakub Jermar <jakub@…>, 16 years ago

Do not flush TLB every time a thread is scheduled. Flush TLB only when a new
address space is installed.

  • Property mode set to 100644
File size: 4.4 KB
Line 
1/*
2 * Copyright (c) 2007 Michal Kebrt
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * - Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * - The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29/** @addtogroup arm32
30 * @{
31 */
32/** @file
33 * @brief ARM32 architecture specific functions.
34 */
35
36#include <arch.h>
37#include <config.h>
38#include <genarch/fb/fb.h>
39#include <genarch/fb/visuals.h>
40#include <sysinfo/sysinfo.h>
41#include <console/console.h>
42#include <ddi/irq.h>
43#include <print.h>
44#include <config.h>
45#include <interrupt.h>
46#include <arch/regutils.h>
47#include <userspace.h>
48#include <macros.h>
49#include <string.h>
50#include <arch/ras.h>
51
52#ifdef MACHINE_testarm
53 #include <arch/mach/testarm/testarm.h>
54#endif
55
56#ifdef MACHINE_integratorcp
57 #include <arch/mach/integratorcp/integratorcp.h>
58#endif
59
60
61/** Performs arm32-specific initialization before main_bsp() is called. */
62void arch_pre_main(void *entry __attribute__((unused)), bootinfo_t *bootinfo)
63{
64 unsigned int i;
65
66 init.cnt = bootinfo->cnt;
67
68 for (i = 0; i < min3(bootinfo->cnt, TASKMAP_MAX_RECORDS, CONFIG_INIT_TASKS); ++i) {
69 init.tasks[i].addr = bootinfo->tasks[i].addr;
70 init.tasks[i].size = bootinfo->tasks[i].size;
71 str_cpy(init.tasks[i].name, CONFIG_TASK_NAME_BUFLEN,
72 bootinfo->tasks[i].name);
73 }
74}
75
76/** Performs arm32 specific initialization before mm is initialized. */
77void arch_pre_mm_init(void)
78{
79 /* It is not assumed by default */
80 interrupts_disable();
81}
82
83/** Performs arm32 specific initialization afterr mm is initialized. */
84void arch_post_mm_init(void)
85{
86 machine_init();
87
88 /* Initialize exception dispatch table */
89 exception_init();
90 interrupt_init();
91
92 /* Initialize Restartable Atomic Sequences support. */
93 ras_init();
94
95 machine_output_init();
96}
97
98/** Performs arm32 specific tasks needed after cpu is initialized.
99 *
100 * Currently the function is empty.
101 */
102void arch_post_cpu_init(void)
103{
104}
105
106
107/** Performs arm32 specific tasks needed before the multiprocessing is
108 * initialized.
109 *
110 * Currently the function is empty because SMP is not supported.
111 */
112void arch_pre_smp_init(void)
113{
114}
115
116
117/** Performs arm32 specific tasks needed after the multiprocessing is
118 * initialized.
119 *
120 * Currently the function is empty because SMP is not supported.
121 */
122void arch_post_smp_init(void)
123{
124 machine_input_init();
125}
126
127
128/** Performs arm32 specific tasks needed before the new task is run. */
129void before_task_runs_arch(void)
130{
131}
132
133
134/** Performs arm32 specific tasks needed before the new thread is scheduled.
135 *
136 * It sets supervisor_sp.
137 */
138void before_thread_runs_arch(void)
139{
140 uint8_t *stck;
141
142 stck = &THREAD->kstack[THREAD_STACK_SIZE - SP_DELTA];
143 supervisor_sp = (uintptr_t) stck;
144}
145
146/** Performs arm32 specific tasks before a thread stops running.
147 *
148 * Currently the function is empty.
149 */
150void after_thread_ran_arch(void)
151{
152}
153
154/** Halts CPU. */
155void cpu_halt(void)
156{
157 machine_cpu_halt();
158}
159
160/** Reboot. */
161void arch_reboot()
162{
163 /* not implemented */
164 while (1);
165}
166
167/** Construct function pointer
168 *
169 * @param fptr function pointer structure
170 * @param addr function address
171 * @param caller calling function address
172 *
173 * @return address of the function pointer
174 *
175 */
176void *arch_construct_function(fncptr_t *fptr, void *addr, void *caller)
177{
178 return addr;
179}
180
181/** @}
182 */
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