xref: /netbsd-src/sys/arch/ia64/ia64/sal.c (revision a6ce3504542ed8b086b0b8c7681fff4540e0cdd8)
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