1 /* $NetBSD: sal.c,v 1.4 2023/12/20 15:00:08 thorpej Exp $ */
2
3 /*-
4 * Copyright (c) 2001 Doug Rabson
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include "opt_multiprocessor.h"
30
31 #include <sys/cdefs.h>
32
33 #include <sys/param.h>
34 #include <sys/reboot.h>
35 #include <sys/systm.h>
36 #include <sys/kernel.h>
37
38 #include <machine/efi.h>
39 #include <machine/vmparam.h>
40 #include <machine/md_var.h>
41 #include <machine/sal.h>
42 #include <machine/smp.h>
43
44 /*
45 * IPIs are used more genericly than only
46 * for inter-processor interrupts. Don't
47 * make it a SMP specific thing...
48 */
49 int ipi_vector[IPI_COUNT];
50
51 static struct ia64_fdesc sal_fdesc;
52 static sal_entry_t fake_sal;
53
54 extern u_int64_t ia64_pal_entry;
55 sal_entry_t *ia64_sal_entry = fake_sal;
56
57 static struct uuid sal_table = EFI_TABLE_SAL;
58 static struct sal_system_table *sal_systbl;
59
60 static struct ia64_sal_result
fake_sal(u_int64_t a1,u_int64_t a2,u_int64_t a3,u_int64_t a4,u_int64_t a5,u_int64_t a6,u_int64_t a7,u_int64_t a8)61 fake_sal(u_int64_t a1, u_int64_t a2, u_int64_t a3, u_int64_t a4,
62 u_int64_t a5, u_int64_t a6, u_int64_t a7, u_int64_t a8)
63 {
64 struct ia64_sal_result res;
65 res.sal_status = -3;
66 res.sal_result[0] = 0;
67 res.sal_result[1] = 0;
68 res.sal_result[2] = 0;
69 return res;
70 }
71
72 static void
setup_ipi_vectors(int ceil)73 setup_ipi_vectors(int ceil)
74 {
75 int ipi;
76
77 ipi_vector[IPI_MCA_RENDEZ] = ceil - 0x10;
78 ipi_vector[IPI_MCA_CMCV] = ceil - 0x30;
79 ipi_vector[IPI_TEST] = ceil - 0x30 + 1;
80
81 ipi = IPI_AST; /* First generic IPI. */
82 ceil -= 0x20; /* First vector in group. */
83 while (ipi < IPI_COUNT)
84 ipi_vector[ipi++] = ceil++;
85 }
86
87 void
ia64_sal_init(void)88 ia64_sal_init(void)
89 {
90 static int sizes[6] = {
91 48, 32, 16, 32, 16, 16
92 };
93 u_int8_t *p;
94 int i;
95
96 sal_systbl = efi_get_table(&sal_table);
97 if (sal_systbl == NULL)
98 return;
99
100 if (memcmp(sal_systbl->sal_signature, SAL_SIGNATURE, 4)) {
101 printf("Bad signature for SAL System Table\n");
102 return;
103 }
104
105 p = (u_int8_t *) (sal_systbl + 1);
106 for (i = 0; i < sal_systbl->sal_entry_count; i++) {
107 switch (*p) {
108 case 0: {
109 struct sal_entrypoint_descriptor *dp;
110
111 dp = (struct sal_entrypoint_descriptor*)p;
112 ia64_pal_entry = IA64_PHYS_TO_RR7(dp->sale_pal_proc);
113 if (bootverbose)
114 printf("PAL Proc at 0x%lx\n", ia64_pal_entry);
115 sal_fdesc.func = IA64_PHYS_TO_RR7(dp->sale_sal_proc);
116 sal_fdesc.gp = IA64_PHYS_TO_RR7(dp->sale_sal_gp);
117 if (bootverbose)
118 printf("SAL Proc at 0x%lx, GP at 0x%lx\n",
119 sal_fdesc.func, sal_fdesc.gp);
120 ia64_sal_entry = (sal_entry_t *) &sal_fdesc;
121 break;
122 }
123 case 5: {
124 struct sal_ap_wakeup_descriptor *dp;
125 #ifdef MULTIPROCESSOR
126 struct ia64_sal_result result;
127 struct ia64_fdesc *fd;
128 #endif
129
130 dp = (struct sal_ap_wakeup_descriptor*)p;
131 if (dp->sale_mechanism != 0) {
132 printf("SAL: unsupported AP wake-up mechanism "
133 "(%d)\n", dp->sale_mechanism);
134 break;
135 }
136
137 if (dp->sale_vector < 0x10 || dp->sale_vector > 0xff) {
138 printf("SAL: invalid AP wake-up vector "
139 "(0x%lx)\n", dp->sale_vector);
140 break;
141 }
142
143 /*
144 * SAL documents that the wake-up vector should be
145 * high (close to 255). The MCA rendezvous vector
146 * should be less than the wake-up vector, but still
147 * "high". We use the following priority assignment:
148 * Wake-up: priority of the sale_vector
149 * Rendezvous: priority-1
150 * Generic IPIs: priority-2
151 * Special IPIs: priority-3
152 * Consequently, the wake-up priority should be at
153 * least 4 (ie vector >= 0x40).
154 */
155 if (dp->sale_vector < 0x40) {
156 printf("SAL: AP wake-up vector too low "
157 "(0x%lx)\n", dp->sale_vector);
158 break;
159 }
160
161 if (bootverbose)
162 printf("SAL: AP wake-up vector: 0x%lx\n",
163 dp->sale_vector);
164
165 ipi_vector[IPI_AP_WAKEUP] = dp->sale_vector;
166 setup_ipi_vectors(dp->sale_vector & 0xf0);
167
168 #ifdef MULTIPROCESSOR
169 fd = (struct ia64_fdesc *) os_boot_rendez;
170 result = ia64_sal_entry(SAL_SET_VECTORS,
171 SAL_OS_BOOT_RENDEZ, ia64_tpa(fd->func),
172 ia64_tpa(fd->gp), 0, 0, 0, 0);
173 #endif
174
175 break;
176 }
177 }
178 p += sizes[*p];
179 }
180
181 if (ipi_vector[IPI_AP_WAKEUP] == 0)
182 setup_ipi_vectors(0xf0);
183 }
184