2 /* $NetBSD: locore.S,v 1.24 2000/05/31 05:09:17 thorpej Exp $ */
5 * Copyright (C) 2001 Benno Rice
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY Benno Rice ``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 TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
25 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
26 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 * Copyright (C) 1995, 1996 Wolfgang Solfrank.
30 * Copyright (C) 1995, 1996 TooLs GmbH.
31 * All rights reserved.
33 * Redistribution and use in source and binary forms, with or without
34 * modification, are permitted provided that the following conditions
36 * 1. Redistributions of source code must retain the above copyright
37 * notice, this list of conditions and the following disclaimer.
38 * 2. Redistributions in binary form must reproduce the above copyright
39 * notice, this list of conditions and the following disclaimer in the
40 * documentation and/or other materials provided with the distribution.
41 * 3. All advertising materials mentioning features or use of this software
42 * must display the following acknowledgement:
43 * This product includes software developed by TooLs GmbH.
44 * 4. The name of TooLs GmbH may not be used to endorse or promote products
45 * derived from this software without specific prior written permission.
47 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
48 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
49 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
50 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
51 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
52 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
53 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
54 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
55 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
56 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
60 #include "opt_sched.h"
62 #include <sys/syscall.h>
64 #include <machine/trap.h>
65 #include <machine/param.h>
66 #include <machine/asm.h>
68 TOC_ENTRY(blocked_lock)
71 * void cpu_throw(struct thread *old, struct thread *new)
75 li %r14,0 /* Tell cpu_switchin not to release a thread */
80 * void cpu_switch(struct thread *old,
84 * Switch to a new thread saving the current state in the old thread.
87 ld %r6,TD_PCB(%r3) /* Get the old thread's PCB ptr */
88 std %r12,PCB_CONTEXT(%r6) /* Save the non-volatile GP regs.
89 These can now be used for scratch */
90 std %r14,PCB_CONTEXT+2*8(%r6)
91 std %r15,PCB_CONTEXT+3*8(%r6)
92 std %r16,PCB_CONTEXT+4*8(%r6)
93 std %r17,PCB_CONTEXT+5*8(%r6)
94 std %r18,PCB_CONTEXT+6*8(%r6)
95 std %r19,PCB_CONTEXT+7*8(%r6)
96 std %r20,PCB_CONTEXT+8*8(%r6)
97 std %r21,PCB_CONTEXT+9*8(%r6)
98 std %r22,PCB_CONTEXT+10*8(%r6)
99 std %r23,PCB_CONTEXT+11*8(%r6)
100 std %r24,PCB_CONTEXT+12*8(%r6)
101 std %r25,PCB_CONTEXT+13*8(%r6)
102 std %r26,PCB_CONTEXT+14*8(%r6)
103 std %r27,PCB_CONTEXT+15*8(%r6)
104 std %r28,PCB_CONTEXT+16*8(%r6)
105 std %r29,PCB_CONTEXT+17*8(%r6)
106 std %r30,PCB_CONTEXT+18*8(%r6)
107 std %r31,PCB_CONTEXT+19*8(%r6)
109 mfcr %r16 /* Save the condition register */
111 mflr %r16 /* Save the link register */
113 std %r1,PCB_SP(%r6) /* Save the stack pointer */
114 std %r2,PCB_TOC(%r6) /* Save the TOC pointer */
116 mr %r14,%r3 /* Copy the old thread ptr... */
117 mr %r13,%r4 /* and the new thread ptr in curthread*/
118 mr %r16,%r5 /* and the new lock */
119 mr %r17,%r6 /* and the PCB */
123 lwz %r7,PCB_FLAGS(%r17)
124 /* Save FPU context if needed */
125 andi. %r7, %r7, PCB_FPU
131 mr %r3,%r14 /* restore old thread ptr */
132 lwz %r7,PCB_FLAGS(%r17)
133 /* Save Altivec context if needed */
134 andi. %r7, %r7, PCB_VEC
140 mr %r3,%r14 /* restore old thread ptr */
141 bl pmap_deactivate /* Deactivate the current pmap */
144 sync /* Make sure all of that finished */
147 #if defined(SMP) && defined(SCHED_ULE)
148 /* Wait for the new thread to become unblocked */
149 ld %r6,TOC_REF(blocked_lock)(%r2)
157 ld %r17,TD_PCB(%r13) /* Get new PCB */
158 ld %r1,PCB_SP(%r17) /* Load the stack pointer */
160 /* Release old thread now that we have a stack pointer set up */
163 std %r16,TD_LOCK(%r14) /* ULE: update old thread's lock */
165 1: mfsprg %r7,0 /* Get the pcpu pointer */
166 std %r13,PC_CURTHREAD(%r7) /* Store new current thread */
167 ld %r17,TD_PCB(%r13) /* Store new current PCB */
168 std %r17,PC_CURPCB(%r7)
170 mr %r3,%r13 /* Get new thread ptr */
171 bl pmap_activate /* Activate the new address space */
174 lwz %r6, PCB_FLAGS(%r17)
175 /* Restore FPU context if needed */
176 andi. %r6, %r6, PCB_FPU
178 mr %r3,%r13 /* Pass curthread to enable_fpu */
183 lwz %r6, PCB_FLAGS(%r17)
184 /* Restore Altivec context if needed */
185 andi. %r6, %r6, PCB_VEC
187 mr %r3,%r13 /* Pass curthread to enable_vec */
191 /* thread to restore is in r3 */
194 mr %r3,%r17 /* Recover PCB ptr */
195 ld %r12,PCB_CONTEXT(%r3) /* Load the non-volatile GP regs. */
196 ld %r14,PCB_CONTEXT+2*8(%r3)
197 ld %r15,PCB_CONTEXT+3*8(%r3)
198 ld %r16,PCB_CONTEXT+4*8(%r3)
199 ld %r17,PCB_CONTEXT+5*8(%r3)
200 ld %r18,PCB_CONTEXT+6*8(%r3)
201 ld %r19,PCB_CONTEXT+7*8(%r3)
202 ld %r20,PCB_CONTEXT+8*8(%r3)
203 ld %r21,PCB_CONTEXT+9*8(%r3)
204 ld %r22,PCB_CONTEXT+10*8(%r3)
205 ld %r23,PCB_CONTEXT+11*8(%r3)
206 ld %r24,PCB_CONTEXT+12*8(%r3)
207 ld %r25,PCB_CONTEXT+13*8(%r3)
208 ld %r26,PCB_CONTEXT+14*8(%r3)
209 ld %r27,PCB_CONTEXT+15*8(%r3)
210 ld %r28,PCB_CONTEXT+16*8(%r3)
211 ld %r29,PCB_CONTEXT+17*8(%r3)
212 ld %r30,PCB_CONTEXT+18*8(%r3)
213 ld %r31,PCB_CONTEXT+19*8(%r3)
214 ld %r5,PCB_CR(%r3) /* Load the condition register */
216 ld %r5,PCB_LR(%r3) /* Load the link register */
218 ld %r1,PCB_SP(%r3) /* Load the stack pointer */
219 ld %r2,PCB_TOC(%r3) /* Load the TOC pointer */
221 lis %r5,USER_ADDR@highesta /* Load the copyin/out segment reg */
222 ori %r5,%r5,USER_ADDR@highera
224 oris %r5,%r5,USER_ADDR@ha
227 lis %r6,USER_SLB_SLBE@highesta
228 ori %r6,%r6,USER_SLB_SLBE@highera
230 oris %r6,%r6,USER_SLB_SLBE@ha
231 ori %r6,%r6,USER_SLB_SLBE@l
232 ld %r5,PCB_AIM_USR_VSID(%r3)
237 * Perform a dummy stdcx. to clear any reservations we may have
238 * inherited from the previous thread. It doesn't matter if the
239 * stdcx succeeds or not. pcb_context[0] can be clobbered.
246 * Update pcb, saving current processor state
249 std %r12,PCB_CONTEXT(%r3) /* Save the non-volatile GP regs. */
250 std %r13,PCB_CONTEXT+1*8(%r3)
251 std %r14,PCB_CONTEXT+2*8(%r3)
252 std %r15,PCB_CONTEXT+3*8(%r3)
253 std %r16,PCB_CONTEXT+4*8(%r3)
254 std %r17,PCB_CONTEXT+5*8(%r3)
255 std %r18,PCB_CONTEXT+6*8(%r3)
256 std %r19,PCB_CONTEXT+7*8(%r3)
257 std %r20,PCB_CONTEXT+8*8(%r3)
258 std %r21,PCB_CONTEXT+9*8(%r3)
259 std %r22,PCB_CONTEXT+10*8(%r3)
260 std %r23,PCB_CONTEXT+11*8(%r3)
261 std %r24,PCB_CONTEXT+12*8(%r3)
262 std %r25,PCB_CONTEXT+13*8(%r3)
263 std %r26,PCB_CONTEXT+14*8(%r3)
264 std %r27,PCB_CONTEXT+15*8(%r3)
265 std %r28,PCB_CONTEXT+16*8(%r3)
266 std %r29,PCB_CONTEXT+17*8(%r3)
267 std %r30,PCB_CONTEXT+18*8(%r3)
268 std %r31,PCB_CONTEXT+19*8(%r3)
270 mfcr %r4 /* Save the condition register */
272 std %r2,PCB_TOC(%r3) /* Save the TOC pointer */
277 * Set up the return from cpu_fork()
280 ENTRY_NOPROF(fork_trampoline)
288 addi %r1,%r1,48+CF_SIZE-FSP /* Allow 8 bytes in front of
289 trapframe to simulate FRAME_SETUP
290 does when allocating space for
291 a frame pointer/saved LR */