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.
61 #include <sys/syscall.h>
63 #include <machine/trap.h>
64 #include <machine/param.h>
65 #include <machine/spr.h>
66 #include <machine/asm.h>
68 /* Locate the per-CPU data structure */
69 #define GET_CPUINFO(r) \
71 #define GET_TOCBASE(r) \
72 li r,TRAP_TOCBASE; /* Magic address for TOC */ \
75 /* Glue for linker script */
77 .set kernbase, KERNBASE
90 #define TMPSTKSZ 16384 /* 16K temporary stack */
101 * This symbol is here for the benefit of kvm_mkdb, and is supposed to
102 * mark the start of kernel text.
108 * Startup entry. Note, this must be the first thing in the text
111 * Calling convention:
112 * r3: Flattened Device Tree pointer (or zero)
114 * r5: OF client interface pointer (or zero)
115 * r6: Loader metadata pointer (or zero)
118 ASENTRY_NOPROF(__start)
119 /* Set up the TOC pointer */
124 .llong __tocbase + 0x8000 - .
129 /* Get load offset */
130 ld %r31,-0x8000(%r2) /* First TOC entry is TOC base */
131 subf %r31,%r31,%r2 /* Subtract from real TOC base to get base */
133 /* Set up the stack pointer */
134 ld %r1,TOC_REF(tmpstk)(%r2)
135 addi %r1,%r1,TMPSTKSZ-96
138 /* Relocate kernel */
156 /* Switch to 64-bit mode */
164 mr %r4,%r2 /* Replace ignored r4 with tocbase for trap handlers */
168 /* Set stack pointer to new value and branch to mi_startup */
175 /* If this returns (it won't), go back to firmware */
182 * Similar to setjmp to setup for handling faults on accesses to user memory.
183 * Any routine using this may only call bcopy, either the form below,
184 * or the (currently used) C code optimized, so it doesn't use any non-volatile
187 ASENTRY_NOPROF(setfault)
191 ld 4,TD_PCB(13) /* curthread = r13 */
197 std %r12,24(%r3) /* Save the non-volatile GP regs. */
207 std %r22,24+10*8(%r3)
208 std %r23,24+11*8(%r3)
209 std %r24,24+12*8(%r3)
210 std %r25,24+13*8(%r3)
211 std %r26,24+14*8(%r3)
212 std %r27,24+15*8(%r3)
213 std %r28,24+16*8(%r3)
214 std %r29,24+17*8(%r3)
215 std %r30,24+18*8(%r3)
216 std %r31,24+19*8(%r3)
221 #include <powerpc/aim/trap_subr64.S>