Fully synchronize sys/boot from FreeBSD-5.x, but add / to the module path
[dragonfly.git] / sys / boot / ia64 / libski / elf_freebsd.c
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1/* $NetBSD: loadfile.c,v 1.10 1998/06/25 06:45:46 ross Exp $ */
2
3/*-
4 * Copyright (c) 1997 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
9 * NASA Ames Research Center.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. All advertising materials mentioning features or use of this software
20 * must display the following acknowledgement:
21 * This product includes software developed by the NetBSD
22 * Foundation, Inc. and its contributors.
23 * 4. Neither the name of The NetBSD Foundation nor the names of its
24 * contributors may be used to endorse or promote products derived
25 * from this software without specific prior written permission.
26 *
27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
30 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
37 * POSSIBILITY OF SUCH DAMAGE.
38 */
39/*
40 * Copyright (c) 1992, 1993
41 * The Regents of the University of California. All rights reserved.
42 *
43 * This code is derived from software contributed to Berkeley by
44 * Ralph Campbell.
45 *
46 * Redistribution and use in source and binary forms, with or without
47 * modification, are permitted provided that the following conditions
48 * are met:
49 * 1. Redistributions of source code must retain the above copyright
50 * notice, this list of conditions and the following disclaimer.
51 * 2. Redistributions in binary form must reproduce the above copyright
52 * notice, this list of conditions and the following disclaimer in the
53 * documentation and/or other materials provided with the distribution.
54 * 3. All advertising materials mentioning features or use of this software
55 * must display the following acknowledgement:
56 * This product includes software developed by the University of
57 * California, Berkeley and its contributors.
58 * 4. Neither the name of the University nor the names of its contributors
59 * may be used to endorse or promote products derived from this software
60 * without specific prior written permission.
61 *
62 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
63 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
64 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
65 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
66 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
67 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
68 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
69 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
70 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
71 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
72 * SUCH DAMAGE.
73 *
74 * @(#)boot.c 8.1 (Berkeley) 6/10/93
75 * $FreeBSD: src/sys/boot/ia64/libski/elf_freebsd.c,v 1.9 2003/09/08 09:11:32 obrien Exp $
76 * $DragonFly: src/sys/boot/ia64/libski/elf_freebsd.c,v 1.1 2003/11/10 06:08:37 dillon Exp $
77 */
78
79#include <stand.h>
80#include <string.h>
81
82#include <sys/param.h>
83#include <sys/linker.h>
84#include <machine/elf.h>
85#include <machine/bootinfo.h>
86#include <machine/ia64_cpu.h>
87#include <machine/vmparam.h>
88
89#include "bootstrap.h"
90#include "libski.h"
91
92#define _KERNEL
93
94static int elf64_exec(struct preloaded_file *amp);
95
96struct file_format ia64_elf = { elf64_loadfile, elf64_exec };
97
98#define PTE_MA_WB 0
99#define PTE_MA_UC 4
100#define PTE_MA_UCE 5
101#define PTE_MA_WC 6
102#define PTE_MA_NATPAGE 7
103
104#define PTE_PL_KERN 0
105#define PTE_PL_USER 3
106
107#define PTE_AR_R 0
108#define PTE_AR_RX 1
109#define PTE_AR_RW 2
110#define PTE_AR_RWX 3
111#define PTE_AR_R_RW 4
112#define PTE_AR_RX_RWX 5
113#define PTE_AR_RWX_RW 6
114#define PTE_AR_X_RX 7
115
116/*
117 * A short-format VHPT entry. Also matches the TLB insertion format.
118 */
119struct ia64_pte {
120 u_int64_t pte_p :1; /* bits 0..0 */
121 u_int64_t pte_rv1 :1; /* bits 1..1 */
122 u_int64_t pte_ma :3; /* bits 2..4 */
123 u_int64_t pte_a :1; /* bits 5..5 */
124 u_int64_t pte_d :1; /* bits 6..6 */
125 u_int64_t pte_pl :2; /* bits 7..8 */
126 u_int64_t pte_ar :3; /* bits 9..11 */
127 u_int64_t pte_ppn :38; /* bits 12..49 */
128 u_int64_t pte_rv2 :2; /* bits 50..51 */
129 u_int64_t pte_ed :1; /* bits 52..52 */
130 u_int64_t pte_ig :11; /* bits 53..63 */
131};
132
133static struct bootinfo bootinfo;
134
135void
136enter_kernel(const char* filename, u_int64_t start, struct bootinfo *bi)
137{
138 printf("Entering %s at 0x%lx...\n", filename, start);
139
140 while (*filename == '/')
141 filename++;
142 ssc(0, (u_int64_t) filename, 0, 0, SSC_LOAD_SYMBOLS);
143
144 __asm __volatile("mov cr.ipsr=%0"
145 :: "r"(IA64_PSR_IC
146 | IA64_PSR_DT
147 | IA64_PSR_RT
148 | IA64_PSR_IT
149 | IA64_PSR_BN));
150 __asm __volatile("mov cr.iip=%0" :: "r"(start));
151 __asm __volatile("mov cr.ifs=r0;;");
152 __asm __volatile("mov r8=%0" :: "r" (bi));
153 __asm __volatile("rfi;;");
154}
155
156static int
157elf64_exec(struct preloaded_file *fp)
158{
159 struct file_metadata *md;
160 Elf_Ehdr *hdr;
161 struct ia64_pte pte;
162 struct bootinfo *bi;
163
164 if ((md = file_findmetadata(fp, MODINFOMD_ELFHDR)) == NULL)
165 return(EFTYPE); /* XXX actually EFUCKUP */
166 hdr = (Elf_Ehdr *)&(md->md_data);
167
168 /*
169 * Ugly hack, similar to linux. Dump the bootinfo into a
170 * special page reserved in the link map.
171 */
172 bi = &bootinfo;
173 bzero(bi, sizeof(struct bootinfo));
174 bi_load(bi, fp);
175
176 /*
177 * Region 6 is direct mapped UC and region 7 is direct mapped
178 * WC. The details of this is controlled by the Alt {I,D}TLB
179 * handlers. Here we just make sure that they have the largest
180 * possible page size to minimise TLB usage.
181 */
182 ia64_set_rr(IA64_RR_BASE(6), (6 << 8) | (28 << 2));
183 ia64_set_rr(IA64_RR_BASE(7), (7 << 8) | (28 << 2));
184
185 bzero(&pte, sizeof(pte));
186 pte.pte_p = 1;
187 pte.pte_ma = PTE_MA_WB;
188 pte.pte_a = 1;
189 pte.pte_d = 1;
190 pte.pte_pl = PTE_PL_KERN;
191 pte.pte_ar = PTE_AR_RWX;
192 pte.pte_ppn = 0;
193
194 __asm __volatile("mov cr.ifa=%0" :: "r"(IA64_RR_BASE(7)));
195 __asm __volatile("mov cr.itir=%0" :: "r"(28 << 2));
196 __asm __volatile("srlz.i;;");
197 __asm __volatile("itr.i itr[%0]=%1;;"
198 :: "r"(0), "r"(*(u_int64_t*)&pte));
199 __asm __volatile("srlz.i;;");
200 __asm __volatile("itr.d dtr[%0]=%1;;"
201 :: "r"(0), "r"(*(u_int64_t*)&pte));
202 __asm __volatile("srlz.i;;");
203
204 enter_kernel(fp->f_name, hdr->e_entry, bi);
205}