sal.c revision 183299 
1/*-
2 * Copyright (c) 2001 Doug Rabson
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD: head/sys/ia64/ia64/sal.c 183299 2008-09-23 14:45:10Z obrien $");
29
30#include <sys/param.h>
31#include <sys/systm.h>
32#include <sys/kernel.h>
33#include <sys/malloc.h>
34#include <vm/vm.h>
35#include <vm/vm_kern.h>
36#include <machine/efi.h>
37#include <machine/md_var.h>
38#include <machine/sal.h>
39#include <machine/smp.h>
40
41/*
42 * IPIs are used more genericly than only
43 * for inter-processor interrupts. Don't
44 * make it a SMP specific thing...
45 */
46int ipi_vector[IPI_COUNT];
47
48static struct ia64_fdesc sal_fdesc;
49static sal_entry_t	fake_sal;
50
51extern u_int64_t	ia64_pal_entry;
52sal_entry_t		*ia64_sal_entry = fake_sal;
53
54static struct uuid sal_table = EFI_TABLE_SAL;
55static struct sal_system_table *sal_systbl;
56
57static struct ia64_sal_result
58fake_sal(u_int64_t a1, u_int64_t a2, u_int64_t a3, u_int64_t a4,
59	 u_int64_t a5, u_int64_t a6, u_int64_t a7, u_int64_t a8)
60{
61	struct ia64_sal_result res;
62	res.sal_status = -3;
63	res.sal_result[0] = 0;
64	res.sal_result[1] = 0;
65	res.sal_result[2] = 0;
66	return res;
67}
68
69static void
70setup_ipi_vectors(int ceil)
71{
72	int ipi;
73
74	ipi_vector[IPI_MCA_RENDEZ] = ceil - 0x10;
75
76	ipi = IPI_AST;		/* First generic IPI. */
77	ceil -= 0x20;		/* First vector in group. */
78	while (ipi < IPI_COUNT)
79		ipi_vector[ipi++] = ceil++;
80
81	ipi_vector[IPI_HIGH_FP] = ceil - 0x30;
82	ipi_vector[IPI_MCA_CMCV] = ceil - 0x30 + 1;
83	ipi_vector[IPI_TEST] = ceil - 0x30 + 2;
84}
85
86void
87ia64_sal_init(void)
88{
89	static int sizes[6] = {
90		48, 32, 16, 32, 16, 16
91	};
92	u_int8_t *p;
93	int i;
94
95	sal_systbl = efi_get_table(&sal_table);
96	if (sal_systbl == NULL)
97		return;
98
99	if (bcmp(sal_systbl->sal_signature, SAL_SIGNATURE, 4)) {
100		printf("Bad signature for SAL System Table\n");
101		return;
102	}
103
104	p = (u_int8_t *) (sal_systbl + 1);
105	for (i = 0; i < sal_systbl->sal_entry_count; i++) {
106		switch (*p) {
107		case 0: {
108			struct sal_entrypoint_descriptor *dp;
109
110			dp = (struct sal_entrypoint_descriptor*)p;
111			ia64_pal_entry = IA64_PHYS_TO_RR7(dp->sale_pal_proc);
112			if (bootverbose)
113				printf("PAL Proc at 0x%lx\n", ia64_pal_entry);
114			sal_fdesc.func = IA64_PHYS_TO_RR7(dp->sale_sal_proc);
115			sal_fdesc.gp = IA64_PHYS_TO_RR7(dp->sale_sal_gp);
116			if (bootverbose)
117				printf("SAL Proc at 0x%lx, GP at 0x%lx\n",
118				    sal_fdesc.func, sal_fdesc.gp);
119			ia64_sal_entry = (sal_entry_t *) &sal_fdesc;
120			break;
121		}
122		case 5: {
123			struct sal_ap_wakeup_descriptor *dp;
124#ifdef SMP
125			struct ia64_sal_result result;
126			struct ia64_fdesc *fd;
127#endif
128
129			dp = (struct sal_ap_wakeup_descriptor*)p;
130			if (dp->sale_mechanism != 0) {
131				printf("SAL: unsupported AP wake-up mechanism "
132				    "(%d)\n", dp->sale_mechanism);
133				break;
134			}
135
136			if (dp->sale_vector < 0x10 || dp->sale_vector > 0xff) {
137				printf("SAL: invalid AP wake-up vector "
138				    "(0x%lx)\n", dp->sale_vector);
139				break;
140			}
141
142			/*
143			 * SAL documents that the wake-up vector should be
144			 * high (close to 255). The MCA rendezvous vector
145			 * should be less than the wake-up vector, but still
146			 * "high". We use the following priority assignment:
147			 *	Wake-up:	priority of the sale_vector
148			 *	Rendezvous:	priority-1
149			 *	Generic IPIs:	priority-2
150			 *	Special IPIs:	priority-3
151			 * Consequently, the wake-up priority should be at
152			 * least 4 (ie vector >= 0x40).
153			 */
154			if (dp->sale_vector < 0x40) {
155				printf("SAL: AP wake-up vector too low "
156				    "(0x%lx)\n", dp->sale_vector);
157				break;
158			}
159
160			if (bootverbose)
161				printf("SAL: AP wake-up vector: 0x%lx\n",
162				    dp->sale_vector);
163
164			ipi_vector[IPI_AP_WAKEUP] = dp->sale_vector;
165			setup_ipi_vectors(dp->sale_vector & 0xf0);
166
167#ifdef SMP
168			fd = (struct ia64_fdesc *) os_boot_rendez;
169			result = ia64_sal_entry(SAL_SET_VECTORS,
170			    SAL_OS_BOOT_RENDEZ, ia64_tpa(fd->func),
171			    ia64_tpa(fd->gp), 0, 0, 0, 0);
172#endif
173
174			break;
175		}
176		}
177		p += sizes[*p];
178	}
179
180	if (ipi_vector[IPI_AP_WAKEUP] == 0)
181		setup_ipi_vectors(0xf0);
182}
183