sal.c revision 96442 
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 * $FreeBSD: head/sys/ia64/ia64/sal.c 96442 2002-05-12 05:54:21Z marcel $
27 */
28
29#include <sys/param.h>
30#include <sys/systm.h>
31#include <sys/kernel.h>
32#include <sys/malloc.h>
33#include <vm/vm.h>
34#include <vm/vm_kern.h>
35#include <machine/md_var.h>
36#include <machine/sal.h>
37#include <machine/smp.h>
38
39/*
40 * IPIs are used more genericly than only
41 * for inter-processor interrupts. Don't
42 * make it a SMP specific thing...
43 */
44int ipi_vector[IPI_COUNT];
45
46static struct ia64_fdesc sal_fdesc;
47static sal_entry_t	fake_sal;
48
49extern u_int64_t	ia64_pal_entry;
50sal_entry_t		*ia64_sal_entry = fake_sal;
51
52static struct ia64_sal_result
53fake_sal(u_int64_t a1, u_int64_t a2, u_int64_t a3, u_int64_t a4,
54	 u_int64_t a5, u_int64_t a6, u_int64_t a7, u_int64_t a8)
55{
56	struct ia64_sal_result res;
57	res.sal_status = -3;
58	res.sal_result[0] = 0;
59	res.sal_result[1] = 0;
60	res.sal_result[2] = 0;
61	return res;
62}
63
64static void
65setup_ipi_vectors(int ceil)
66{
67	int ipi;
68
69	ipi_vector[IPI_MCA_RENDEZ] = ceil - 0x10;
70	ipi_vector[IPI_MCA_CMCV] = ceil - 0x30;
71	ipi_vector[IPI_TEST] = ceil - 0x30 + 1;
72
73	ipi = IPI_AST;		/* First generic IPI. */
74	ceil -= 0x20;		/* First vector in group. */
75	while (ipi < IPI_COUNT)
76		ipi_vector[ipi++] = ceil++;
77}
78
79void
80ia64_sal_init(struct sal_system_table *saltab)
81{
82	static int sizes[6] = {
83		48, 32, 16, 32, 16, 16
84	};
85	u_int8_t *p;
86	int i;
87
88	if (memcmp(saltab->sal_signature, "SST_", 4)) {
89		printf("Bad signature for SAL System Table\n");
90		return;
91	}
92
93	p = (u_int8_t *) (saltab + 1);
94	for (i = 0; i < saltab->sal_entry_count; i++) {
95		switch (*p) {
96		case 0: {
97			struct sal_entrypoint_descriptor *dp;
98
99			dp = (struct sal_entrypoint_descriptor*)p;
100			ia64_pal_entry = IA64_PHYS_TO_RR7(dp->sale_pal_proc);
101			if (bootverbose)
102				printf("PAL Proc at 0x%lx\n", ia64_pal_entry);
103			sal_fdesc.func = IA64_PHYS_TO_RR7(dp->sale_sal_proc);
104			sal_fdesc.gp = IA64_PHYS_TO_RR7(dp->sale_sal_gp);
105			if (bootverbose)
106				printf("SAL Proc at 0x%lx, GP at 0x%lx\n",
107				    sal_fdesc.func, sal_fdesc.gp);
108			ia64_sal_entry = (sal_entry_t *) &sal_fdesc;
109			break;
110		}
111		case 5: {
112			struct sal_ap_wakeup_descriptor *dp;
113#ifdef SMP
114			struct ia64_sal_result result;
115#endif
116
117			dp = (struct sal_ap_wakeup_descriptor*)p;
118			if (dp->sale_mechanism != 0) {
119				printf("SAL: unsupported AP wake-up mechanism "
120				    "(%d)\n", dp->sale_mechanism);
121				break;
122			}
123
124			if (dp->sale_vector < 0x10 || dp->sale_vector > 0xff) {
125				printf("SAL: invalid AP wake-up vector "
126				    "(0x%lx)\n", dp->sale_vector);
127				break;
128			}
129
130			/*
131			 * SAL documents that the wake-up vector should be
132			 * high (close to 255). The MCA rendezvous vector
133			 * should be less than the wake-up vector, but still
134			 * "high". We use the following priority assignment:
135			 *	Wake-up:	priority of the sale_vector
136			 *	Rendezvous:	priority-1
137			 *	Generic IPIs:	priority-2
138			 *	Special IPIs:	priority-3
139			 * Consequently, the wake-up priority should be at
140			 * least 4 (ie vector >= 0x40).
141			 */
142			if (dp->sale_vector < 0x40) {
143				printf("SAL: AP wake-up vector too low "
144				    "(0x%lx)\n", dp->sale_vector);
145				break;
146			}
147
148			if (bootverbose)
149				printf("SAL: AP wake-up vector: 0x%x\n",
150				    dp->sale_vector);
151
152			ipi_vector[IPI_AP_WAKEUP] = dp->sale_vector;
153			setup_ipi_vectors(dp->sale_vector & 0xf0);
154
155#ifdef SMP
156			result = ia64_sal_entry(SAL_SET_VECTORS,
157			    SAL_OS_BOOT_RENDEZ,
158			    ia64_tpa(FDESC_FUNC(os_boot_rendez)),
159			    ia64_tpa(FDESC_GP(os_boot_rendez)),
160			    0, 0, 0, 0);
161#endif
162
163			break;
164		}
165		}
166		p += sizes[*p];
167	}
168
169	if (ipi_vector[IPI_AP_WAKEUP] == 0)
170		setup_ipi_vectors(0xf0);
171}
172