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1da177e4 LT |
1 | /* |
2 | * Written by: Garry Forsgren, Unisys Corporation | |
3 | * Natalie Protasevich, Unisys Corporation | |
4 | * This file contains the code to configure and interface | |
5 | * with Unisys ES7000 series hardware system manager. | |
6 | * | |
7 | * Copyright (c) 2003 Unisys Corporation. All Rights Reserved. | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify it | |
10 | * under the terms of version 2 of the GNU General Public License as | |
11 | * published by the Free Software Foundation. | |
12 | * | |
13 | * This program is distributed in the hope that it would be useful, but | |
14 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License along | |
18 | * with this program; if not, write the Free Software Foundation, Inc., 59 | |
19 | * Temple Place - Suite 330, Boston MA 02111-1307, USA. | |
20 | * | |
21 | * Contact information: Unisys Corporation, Township Line & Union Meeting | |
22 | * Roads-A, Unisys Way, Blue Bell, Pennsylvania, 19424, or: | |
23 | * | |
24 | * http://www.unisys.com | |
25 | */ | |
26 | ||
27 | #include <linux/module.h> | |
28 | #include <linux/types.h> | |
29 | #include <linux/kernel.h> | |
30 | #include <linux/smp.h> | |
31 | #include <linux/string.h> | |
32 | #include <linux/spinlock.h> | |
33 | #include <linux/errno.h> | |
34 | #include <linux/notifier.h> | |
35 | #include <linux/reboot.h> | |
36 | #include <linux/init.h> | |
37 | #include <linux/acpi.h> | |
38 | #include <asm/io.h> | |
39 | #include <asm/nmi.h> | |
40 | #include <asm/smp.h> | |
41 | #include <asm/apicdef.h> | |
42 | #include "es7000.h" | |
071922c0 | 43 | #include <mach_mpparse.h> |
1da177e4 LT |
44 | |
45 | /* | |
46 | * ES7000 Globals | |
47 | */ | |
48 | ||
fb7ae26d AB |
49 | static volatile unsigned long *psai = NULL; |
50 | static struct mip_reg *mip_reg; | |
51 | static struct mip_reg *host_reg; | |
52 | static int mip_port; | |
53 | static unsigned long mip_addr, host_addr; | |
1da177e4 | 54 | |
32c50612 AS |
55 | int es7000_plat; |
56 | ||
1da177e4 LT |
57 | /* |
58 | * GSI override for ES7000 platforms. | |
59 | */ | |
60 | ||
61 | static unsigned int base; | |
62 | ||
63 | static int | |
64 | es7000_rename_gsi(int ioapic, int gsi) | |
65 | { | |
9338316c NP |
66 | if (es7000_plat == ES7000_ZORRO) |
67 | return gsi; | |
68 | ||
1da177e4 LT |
69 | if (!base) { |
70 | int i; | |
71 | for (i = 0; i < nr_ioapics; i++) | |
72 | base += nr_ioapic_registers[i]; | |
73 | } | |
74 | ||
c7e7964c | 75 | if (!ioapic && (gsi < 16)) |
1da177e4 LT |
76 | gsi += base; |
77 | return gsi; | |
78 | } | |
79 | ||
56f1d5d5 | 80 | void __init |
9338316c | 81 | setup_unisys(void) |
56f1d5d5 NP |
82 | { |
83 | /* | |
84 | * Determine the generation of the ES7000 currently running. | |
85 | * | |
86 | * es7000_plat = 1 if the machine is a 5xx ES7000 box | |
87 | * es7000_plat = 2 if the machine is a x86_64 ES7000 box | |
88 | * | |
89 | */ | |
90 | if (!(boot_cpu_data.x86 <= 15 && boot_cpu_data.x86_model <= 2)) | |
9338316c | 91 | es7000_plat = ES7000_ZORRO; |
56f1d5d5 | 92 | else |
9338316c | 93 | es7000_plat = ES7000_CLASSIC; |
56f1d5d5 NP |
94 | ioapic_renumber_irq = es7000_rename_gsi; |
95 | } | |
96 | ||
1da177e4 LT |
97 | /* |
98 | * Parse the OEM Table | |
99 | */ | |
100 | ||
101 | int __init | |
56f1d5d5 | 102 | parse_unisys_oem (char *oemptr) |
1da177e4 LT |
103 | { |
104 | int i; | |
105 | int success = 0; | |
106 | unsigned char type, size; | |
107 | unsigned long val; | |
108 | char *tp = NULL; | |
109 | struct psai *psaip = NULL; | |
110 | struct mip_reg_info *mi; | |
111 | struct mip_reg *host, *mip; | |
112 | ||
113 | tp = oemptr; | |
114 | ||
115 | tp += 8; | |
116 | ||
56f1d5d5 | 117 | for (i=0; i <= 6; i++) { |
1da177e4 LT |
118 | type = *tp++; |
119 | size = *tp++; | |
120 | tp -= 2; | |
121 | switch (type) { | |
122 | case MIP_REG: | |
123 | mi = (struct mip_reg_info *)tp; | |
124 | val = MIP_RD_LO(mi->host_reg); | |
125 | host_addr = val; | |
126 | host = (struct mip_reg *)val; | |
127 | host_reg = __va(host); | |
128 | val = MIP_RD_LO(mi->mip_reg); | |
129 | mip_port = MIP_PORT(mi->mip_info); | |
130 | mip_addr = val; | |
131 | mip = (struct mip_reg *)val; | |
132 | mip_reg = __va(mip); | |
5171c304 TG |
133 | pr_debug("es7000_mipcfg: host_reg = 0x%lx \n", |
134 | (unsigned long)host_reg); | |
135 | pr_debug("es7000_mipcfg: mip_reg = 0x%lx \n", | |
136 | (unsigned long)mip_reg); | |
1da177e4 LT |
137 | success++; |
138 | break; | |
139 | case MIP_PSAI_REG: | |
140 | psaip = (struct psai *)tp; | |
141 | if (tp != NULL) { | |
142 | if (psaip->addr) | |
143 | psai = __va(psaip->addr); | |
144 | else | |
145 | psai = NULL; | |
146 | success++; | |
147 | } | |
148 | break; | |
149 | default: | |
150 | break; | |
151 | } | |
1da177e4 LT |
152 | tp += size; |
153 | } | |
154 | ||
155 | if (success < 2) { | |
9338316c | 156 | es7000_plat = NON_UNISYS; |
56f1d5d5 NP |
157 | } else |
158 | setup_unisys(); | |
1da177e4 LT |
159 | return es7000_plat; |
160 | } | |
161 | ||
e5428ede | 162 | #ifdef CONFIG_ACPI |
1da177e4 | 163 | int __init |
56f1d5d5 | 164 | find_unisys_acpi_oem_table(unsigned long *oem_addr) |
1da177e4 | 165 | { |
ceb6c468 AS |
166 | struct acpi_table_header *header = NULL; |
167 | int i = 0; | |
168 | while (ACPI_SUCCESS(acpi_get_table("OEM1", i++, &header))) { | |
169 | if (!memcmp((char *) &header->oem_id, "UNISYS", 6)) { | |
170 | struct oem_table *t = (struct oem_table *)header; | |
171 | *oem_addr = (unsigned long)__acpi_map_table(t->OEMTableAddr, | |
172 | t->OEMTableSize); | |
173 | return 0; | |
1da177e4 LT |
174 | } |
175 | } | |
1da177e4 LT |
176 | return -1; |
177 | } | |
e5428ede | 178 | #endif |
1da177e4 LT |
179 | |
180 | static void | |
181 | es7000_spin(int n) | |
182 | { | |
183 | int i = 0; | |
184 | ||
185 | while (i++ < n) | |
186 | rep_nop(); | |
187 | } | |
188 | ||
189 | static int __init | |
190 | es7000_mip_write(struct mip_reg *mip_reg) | |
191 | { | |
192 | int status = 0; | |
193 | int spin; | |
194 | ||
195 | spin = MIP_SPIN; | |
196 | while (((unsigned long long)host_reg->off_38 & | |
197 | (unsigned long long)MIP_VALID) != 0) { | |
198 | if (--spin <= 0) { | |
199 | printk("es7000_mip_write: Timeout waiting for Host Valid Flag"); | |
200 | return -1; | |
201 | } | |
202 | es7000_spin(MIP_SPIN); | |
203 | } | |
204 | ||
205 | memcpy(host_reg, mip_reg, sizeof(struct mip_reg)); | |
206 | outb(1, mip_port); | |
207 | ||
208 | spin = MIP_SPIN; | |
209 | ||
210 | while (((unsigned long long)mip_reg->off_38 & | |
211 | (unsigned long long)MIP_VALID) == 0) { | |
212 | if (--spin <= 0) { | |
213 | printk("es7000_mip_write: Timeout waiting for MIP Valid Flag"); | |
214 | return -1; | |
215 | } | |
216 | es7000_spin(MIP_SPIN); | |
217 | } | |
218 | ||
219 | status = ((unsigned long long)mip_reg->off_0 & | |
220 | (unsigned long long)0xffff0000000000ULL) >> 48; | |
221 | mip_reg->off_38 = ((unsigned long long)mip_reg->off_38 & | |
222 | (unsigned long long)~MIP_VALID); | |
223 | return status; | |
224 | } | |
225 | ||
226 | int | |
227 | es7000_start_cpu(int cpu, unsigned long eip) | |
228 | { | |
229 | unsigned long vect = 0, psaival = 0; | |
230 | ||
231 | if (psai == NULL) | |
232 | return -1; | |
233 | ||
234 | vect = ((unsigned long)__pa(eip)/0x1000) << 16; | |
235 | psaival = (0x1000000 | vect | cpu); | |
236 | ||
237 | while (*psai & 0x1000000) | |
238 | ; | |
239 | ||
240 | *psai = psaival; | |
241 | ||
242 | return 0; | |
243 | ||
244 | } | |
245 | ||
1da177e4 | 246 | void __init |
fb7ae26d | 247 | es7000_sw_apic(void) |
1da177e4 LT |
248 | { |
249 | if (es7000_plat) { | |
250 | int mip_status; | |
251 | struct mip_reg es7000_mip_reg; | |
252 | ||
253 | printk("ES7000: Enabling APIC mode.\n"); | |
254 | memset(&es7000_mip_reg, 0, sizeof(struct mip_reg)); | |
255 | es7000_mip_reg.off_0 = MIP_SW_APIC; | |
256 | es7000_mip_reg.off_38 = (MIP_VALID); | |
257 | while ((mip_status = es7000_mip_write(&es7000_mip_reg)) != 0) | |
258 | printk("es7000_sw_apic: command failed, status = %x\n", | |
259 | mip_status); | |
260 | return; | |
261 | } | |
262 | } |