1 /*
2 * Copyright (c) 2011 Aeroflex Gaisler
3 *
4 * BSD license:
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
23 */
24
25
26 #include <asm-leon/queue.h>
27 /*#include <sys/fsu_pthread_queue.h>*/
28 #include <asm-leon/contextswitch.h>
29 #include <asm-leon/leonbare_kernel.h>
30 #include <asm-leon/leonbare_debug.h>
31 #include <asm-leon/stack.h>
32 #include <asm-leon/leonstack.h>
33 #include <asm-leon/irq.h>
34
35 int
leonbare_thread_resume(leonbare_thread_t thread)36 leonbare_thread_resume (leonbare_thread_t thread)
37 {
38 leonbare_thread_t i = 0;
39 if ((thread->th_flags & LEONBARE_TH_SUSPENDED) &&
40 !(thread->th_flags & (LEONBARE_TH_TERMINATED | LEONBARE_TH_FINISHED)))
41 {
42
43 LEONBARE_PROTECT_KERNEL_START ();
44 {
45 unsigned int idx = leonbare_thread_getqueueidx (thread);
46
47 if (idx != -1)
48 {
49 LBTAILQ_REMOVE (LEONBARE_KR_RUNQ (idx), thread, th_runq);
50 }
51
52 if (thread->th_pri_idx != -1)
53 {
54 thread->th_runq_idx = thread->th_pri_idx;
55 thread->th_runq_which = LEONBARE_KR_RUNQ_WHICH;
56 LBTAILQ_INSERT_HEAD (LEONBARE_KR_RUNQ (thread->th_runq_idx),
57 thread, th_runq);
58 LEONBARE_TH_SETSTATE (thread, LEONBARE_TH_READY);
59 }
60 }
61 LEONBARE_PROTECT_KERNEL_END ();
62 }
63
64 }
65
66 int
leonbare_thread_terminate(leonbare_thread_t thread)67 leonbare_thread_terminate (leonbare_thread_t thread)
68 {
69 unsigned int ret = 0;
70 leonbare_thread_t c = LEONBARE_KR_CURRENT;
71 LEONBARE_PROTECT_KERNEL_START ();
72 {
73 unsigned int idx = leonbare_thread_getqueueidx (thread);
74
75 if (LEONBARE_RUNQ_ISREADY (idx) || LEONBARE_RUNQ_ISPREPARE (idx) ||
76 LEONBARE_RUNQ_ISSUSPEND (idx))
77 {
78 LBTAILQ_REMOVE (LEONBARE_KR_RUNQ (idx), thread, th_runq);
79 }
80 else
81 {
82 LBPASSERT (LEONBARE_RUNQ_ISKILLED (idx),
83 "thread %s is in no queue ",
84 LEONBARE_TH_NAME_DBG (thread));
85 }
86 LEONBARE_TH_SETSTATE (thread, LEONBARE_TH_TERMINATED);
87 LBTAILQ_INSERT_HEAD (LEONBARE_KR_RUNQ (LEONBARE_RUNQ_KILLED_IDX), thread,
88 th_runq);
89
90 LEONBARE_PRINTQUEUES ();
91
92 LEONBARE_VERIFYSCHED ();
93 }
94 if (thread == LEONBARE_KR_CURRENT)
95 {
96 ret = reschedule ();
97 /* never come here */
98 LEONBARE_STOPALL;
99 }
100 LEONBARE_PROTECT_KERNEL_END ();
101 return ret;
102 }
103
104
105 int
current_suspend()106 current_suspend ()
107 {
108 unsigned int ret = 0;
109 leonbare_thread_t c = LEONBARE_KR_CURRENT;
110 LEONBARE_PROTECT_KERNEL_START ();
111 {
112 LBPASSERT ((c->th_runq_which == LEONBARE_KR_RUNQ_WHICH),
113 "Current thread cannot be on the prepare queue", 0);
114
115 LBTAILQ_REMOVE (LEONBARE_KR_RUNQ (c->th_runq_idx), c, th_runq);
116 LBTAILQ_INSERT_TAIL (LEONBARE_KR_RUNQ (LEONBARE_RUNQ_SUSPENDED_IDX),
117 c, th_runq);
118 c->th_runq_idx = LEONBARE_RUNQ_SUSPENDED_IDX;
119 LEONBARE_TH_SETSTATE (c, LEONBARE_TH_SUSPENDED);
120 LEONBARE_VERIFYSCHED ();
121 }
122 ret = reschedule ();
123 LEONBARE_PROTECT_KERNEL_END ();
124 return ret;
125 }
126
127 void
_leonbare_thread_body()128 _leonbare_thread_body ()
129 {
130 LBDEBUG_FNCALL;
131 leonbare_thread_t thread = LEONBARE_KR_CURRENT;
132
133 LEONBARE_KR_IS_IN_KERNEL = 0;
134 thread->th_result = thread->th_func (thread->th_arg);
135
136 leonbare_thread_terminate (thread);
137
138 LBDEBUG_FNEXIT;
139 }
140
141 #define LEONBARE_BODY_OFFSET 200
142
143 int
leonbare_thread_create(struct leonbare_thread * thread,char * stack,int stacksize)144 leonbare_thread_create (struct leonbare_thread *thread, char *stack,
145 int stacksize)
146 {
147 LEONBARE_PROTECT_DECL (flags);
148 struct sparc_stackframe_regs *sp;
149 unsigned int v;
150 unsigned int fpspill, bodysp, bodyfp;
151 struct leonbare_thread_ctx *threadctx;
152 LBDEBUG_FNCALL;
153
154 thread->th_stack_base = (char *) LEONBARE_STACKALIGN (stack);
155 stacksize -= thread->th_stack_base - stack;
156 thread->th_stack_size = stacksize;
157 thread->th_runq_idx = 0;
158 thread->th_pri_idx = 0;
159 thread->th_account = 0;
160 thread->th_caccount = 0;
161
162 /* stack:
163 * 0:+--------------------------------+ <- thread.th_stack_base
164 * | .... |
165 * +--------------------------------+ <- thread.th_ctx->out[6] (%sp)
166 * | _leonbare_thread_body() frame |
167 * +--------------------------------+ <- thread.th_ctx->sf_ins[6] (%fp)
168 * | WINDOWSPILL |
169 * +--------------------------------+ <- thread.th_ctx->fpu
170 * | struct sparc_fpuwindow_regs |
171 * +--------------------------------+ <- thread.th_stack_base + thread->th_stack_size
172 *
173 */
174 v = (unsigned int) (thread->th_stack_base +
175 LEONBARE_STACKALIGN (thread->th_stack_size -
176 (LEONBARE_BODY_OFFSET +
177 WINDOWSIZE + FW_REGS_SZ)));
178
179 bodysp = ((unsigned int) v);
180 bodyfp = ((unsigned int) bodysp) + LEONBARE_BODY_OFFSET;
181 fpspill = ((unsigned int) bodyfp) + WINDOWSIZE;
182
183 thread->th_ctx.outs[6] = (unsigned int) bodysp;
184 thread->th_ctx.outs[7] = (int) _leonbare_thread_body;
185 thread->th_ctx.outs[7] -= 8;
186 thread->th_ctx.sf_ins[6] = (unsigned int) bodyfp;
187 thread->th_ctx.fpu = (unsigned int) fpspill;
188 thread->th_ctx.magic = LEONBARE_THREAD_CTX_MAGIC;
189
190 thread->th_ctx.psr = 0x0e0;
191 thread->th_ctx.wim = 0x2;
192
193 LBDEBUG_HEADER_PRINTF (LBDEBUG_THREAD_NR,
194 "Thread %s (0x%x): stack [0x%x-0x%x] \n",
195 LEONBARE_TH_NAME_DBG (thread), thread,
196 thread->th_stack_base,
197 thread->th_stack_base + thread->th_stack_size);
198
199 /* newlibc reent */
200 thread->th_reentp = &(thread->th_reent);
201 _REENT_INIT_PTR (thread->th_reentp);
202
203 LEONBARE_PROTECT_KERNEL_START ();
204 /* queues */
205 LBTAILQ_INSERT_TAIL (LEONBARE_KR_ALLQ, thread, th_allq);
206 LBTAILQ_INSERT_TAIL (LEONBARE_KR_RUNQ (thread->th_runq_idx), thread,
207 th_runq);
208
209 LEONBARE_PRINTQUEUES ();
210
211 LEONBARE_PROTECT_KERNEL_END ();
212
213 LBDEBUG_FNEXIT;
214 }
215