[PATCH] Compilation fix for ES7000 when no ACPI is specified in config (i386)
[linux-2.6.git] / arch / i386 / mach-es7000 / es7000plat.c
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"
43
44 /*
45  * ES7000 Globals
46  */
47
48 volatile unsigned long  *psai = NULL;
49 struct mip_reg          *mip_reg;
50 struct mip_reg          *host_reg;
51 int                     mip_port;
52 unsigned long           mip_addr, host_addr;
53
54 /*
55  * GSI override for ES7000 platforms.
56  */
57
58 static unsigned int base;
59
60 static int
61 es7000_rename_gsi(int ioapic, int gsi)
62 {
63         if (es7000_plat == ES7000_ZORRO)
64                 return gsi;
65
66         if (!base) {
67                 int i;
68                 for (i = 0; i < nr_ioapics; i++)
69                         base += nr_ioapic_registers[i];
70         }
71
72         if (!ioapic && (gsi < 16)) 
73                 gsi += base;
74         return gsi;
75 }
76
77 void __init
78 setup_unisys(void)
79 {
80         /*
81          * Determine the generation of the ES7000 currently running.
82          *
83          * es7000_plat = 1 if the machine is a 5xx ES7000 box
84          * es7000_plat = 2 if the machine is a x86_64 ES7000 box
85          *
86          */
87         if (!(boot_cpu_data.x86 <= 15 && boot_cpu_data.x86_model <= 2))
88                 es7000_plat = ES7000_ZORRO;
89         else
90                 es7000_plat = ES7000_CLASSIC;
91         ioapic_renumber_irq = es7000_rename_gsi;
92 }
93
94 /*
95  * Parse the OEM Table
96  */
97
98 int __init
99 parse_unisys_oem (char *oemptr)
100 {
101         int                     i;
102         int                     success = 0;
103         unsigned char           type, size;
104         unsigned long           val;
105         char                    *tp = NULL;
106         struct psai             *psaip = NULL;
107         struct mip_reg_info     *mi;
108         struct mip_reg          *host, *mip;
109
110         tp = oemptr;
111
112         tp += 8;
113
114         for (i=0; i <= 6; i++) {
115                 type = *tp++;
116                 size = *tp++;
117                 tp -= 2;
118                 switch (type) {
119                 case MIP_REG:
120                         mi = (struct mip_reg_info *)tp;
121                         val = MIP_RD_LO(mi->host_reg);
122                         host_addr = val;
123                         host = (struct mip_reg *)val;
124                         host_reg = __va(host);
125                         val = MIP_RD_LO(mi->mip_reg);
126                         mip_port = MIP_PORT(mi->mip_info);
127                         mip_addr = val;
128                         mip = (struct mip_reg *)val;
129                         mip_reg = __va(mip);
130                         Dprintk("es7000_mipcfg: host_reg = 0x%lx \n",
131                                 (unsigned long)host_reg);
132                         Dprintk("es7000_mipcfg: mip_reg = 0x%lx \n",
133                                 (unsigned long)mip_reg);
134                         success++;
135                         break;
136                 case MIP_PSAI_REG:
137                         psaip = (struct psai *)tp;
138                         if (tp != NULL) {
139                                 if (psaip->addr)
140                                         psai = __va(psaip->addr);
141                                 else
142                                         psai = NULL;
143                                 success++;
144                         }
145                         break;
146                 default:
147                         break;
148                 }
149                 tp += size;
150         }
151
152         if (success < 2) {
153                 es7000_plat = NON_UNISYS;
154         } else
155                 setup_unisys();
156         return es7000_plat;
157 }
158
159 #ifdef CONFIG_ACPI
160 int __init
161 find_unisys_acpi_oem_table(unsigned long *oem_addr)
162 {
163         struct acpi_table_rsdp          *rsdp = NULL;
164         unsigned long                   rsdp_phys = 0;
165         struct acpi_table_header        *header = NULL;
166         int                             i;
167         struct acpi_table_sdt           sdt;
168
169         rsdp_phys = acpi_find_rsdp();
170         rsdp = __va(rsdp_phys);
171         if (rsdp->rsdt_address) {
172                 struct acpi_table_rsdt  *mapped_rsdt = NULL;
173                 sdt.pa = rsdp->rsdt_address;
174
175                 header = (struct acpi_table_header *)
176                         __acpi_map_table(sdt.pa, sizeof(struct acpi_table_header));
177                 if (!header)
178                         return -ENODEV;
179
180                 sdt.count = (header->length - sizeof(struct acpi_table_header)) >> 3;
181                 mapped_rsdt = (struct acpi_table_rsdt *)
182                         __acpi_map_table(sdt.pa, header->length);
183                 if (!mapped_rsdt)
184                         return -ENODEV;
185
186                 header = &mapped_rsdt->header;
187
188                 for (i = 0; i < sdt.count; i++)
189                         sdt.entry[i].pa = (unsigned long) mapped_rsdt->entry[i];
190         };
191         for (i = 0; i < sdt.count; i++) {
192
193                 header = (struct acpi_table_header *)
194                         __acpi_map_table(sdt.entry[i].pa,
195                                 sizeof(struct acpi_table_header));
196                 if (!header)
197                         continue;
198                 if (!strncmp((char *) &header->signature, "OEM1", 4)) {
199                         if (!strncmp((char *) &header->oem_id, "UNISYS", 6)) {
200                                 void *addr;
201                                 struct oem_table *t;
202                                 acpi_table_print(header, sdt.entry[i].pa);
203                                 t = (struct oem_table *) __acpi_map_table(sdt.entry[i].pa, header->length);
204                                 addr = (void *) __acpi_map_table(t->OEMTableAddr, t->OEMTableSize);
205                                 *oem_addr = (unsigned long) addr;
206                                 return 0;
207                         }
208                 }
209         }
210         return -1;
211 }
212 #endif
213
214 static void
215 es7000_spin(int n)
216 {
217         int i = 0;
218
219         while (i++ < n)
220                 rep_nop();
221 }
222
223 static int __init
224 es7000_mip_write(struct mip_reg *mip_reg)
225 {
226         int                     status = 0;
227         int                     spin;
228
229         spin = MIP_SPIN;
230         while (((unsigned long long)host_reg->off_38 &
231                 (unsigned long long)MIP_VALID) != 0) {
232                         if (--spin <= 0) {
233                                 printk("es7000_mip_write: Timeout waiting for Host Valid Flag");
234                                 return -1;
235                         }
236                 es7000_spin(MIP_SPIN);
237         }
238
239         memcpy(host_reg, mip_reg, sizeof(struct mip_reg));
240         outb(1, mip_port);
241
242         spin = MIP_SPIN;
243
244         while (((unsigned long long)mip_reg->off_38 &
245                 (unsigned long long)MIP_VALID) == 0) {
246                 if (--spin <= 0) {
247                         printk("es7000_mip_write: Timeout waiting for MIP Valid Flag");
248                         return -1;
249                 }
250                 es7000_spin(MIP_SPIN);
251         }
252
253         status = ((unsigned long long)mip_reg->off_0 &
254                 (unsigned long long)0xffff0000000000ULL) >> 48;
255         mip_reg->off_38 = ((unsigned long long)mip_reg->off_38 &
256                 (unsigned long long)~MIP_VALID);
257         return status;
258 }
259
260 int
261 es7000_start_cpu(int cpu, unsigned long eip)
262 {
263         unsigned long vect = 0, psaival = 0;
264
265         if (psai == NULL)
266                 return -1;
267
268         vect = ((unsigned long)__pa(eip)/0x1000) << 16;
269         psaival = (0x1000000 | vect | cpu);
270
271         while (*psai & 0x1000000)
272                 ;
273
274         *psai = psaival;
275
276         return 0;
277
278 }
279
280 int
281 es7000_stop_cpu(int cpu)
282 {
283         int startup;
284
285         if (psai == NULL)
286                 return -1;
287
288         startup= (0x1000000 | cpu);
289
290         while ((*psai & 0xff00ffff) != startup)
291                 ;
292
293         startup = (*psai & 0xff0000) >> 16;
294         *psai &= 0xffffff;
295
296         return 0;
297
298 }
299
300 void __init
301 es7000_sw_apic()
302 {
303         if (es7000_plat) {
304                 int mip_status;
305                 struct mip_reg es7000_mip_reg;
306
307                 printk("ES7000: Enabling APIC mode.\n");
308                 memset(&es7000_mip_reg, 0, sizeof(struct mip_reg));
309                 es7000_mip_reg.off_0 = MIP_SW_APIC;
310                 es7000_mip_reg.off_38 = (MIP_VALID);
311                 while ((mip_status = es7000_mip_write(&es7000_mip_reg)) != 0)
312                         printk("es7000_sw_apic: command failed, status = %x\n",
313                                 mip_status);
314                 return;
315         }
316 }