Pull video into test branch
[linux-2.6] / arch / ia64 / kernel / sal.c
1 /*
2  * System Abstraction Layer (SAL) interface routines.
3  *
4  * Copyright (C) 1998, 1999, 2001, 2003 Hewlett-Packard Co
5  *      David Mosberger-Tang <davidm@hpl.hp.com>
6  * Copyright (C) 1999 VA Linux Systems
7  * Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
8  */
9
10 #include <linux/kernel.h>
11 #include <linux/init.h>
12 #include <linux/module.h>
13 #include <linux/spinlock.h>
14 #include <linux/string.h>
15
16 #include <asm/delay.h>
17 #include <asm/page.h>
18 #include <asm/sal.h>
19 #include <asm/pal.h>
20
21  __cacheline_aligned DEFINE_SPINLOCK(sal_lock);
22 unsigned long sal_platform_features;
23
24 unsigned short sal_revision;
25 unsigned short sal_version;
26
27 #define SAL_MAJOR(x) ((x) >> 8)
28 #define SAL_MINOR(x) ((x) & 0xff)
29
30 static struct {
31         void *addr;     /* function entry point */
32         void *gpval;    /* gp value to use */
33 } pdesc;
34
35 static long
36 default_handler (void)
37 {
38         return -1;
39 }
40
41 ia64_sal_handler ia64_sal = (ia64_sal_handler) default_handler;
42 ia64_sal_desc_ptc_t *ia64_ptc_domain_info;
43
44 const char *
45 ia64_sal_strerror (long status)
46 {
47         const char *str;
48         switch (status) {
49               case 0: str = "Call completed without error"; break;
50               case 1: str = "Effect a warm boot of the system to complete "
51                               "the update"; break;
52               case -1: str = "Not implemented"; break;
53               case -2: str = "Invalid argument"; break;
54               case -3: str = "Call completed with error"; break;
55               case -4: str = "Virtual address not registered"; break;
56               case -5: str = "No information available"; break;
57               case -6: str = "Insufficient space to add the entry"; break;
58               case -7: str = "Invalid entry_addr value"; break;
59               case -8: str = "Invalid interrupt vector"; break;
60               case -9: str = "Requested memory not available"; break;
61               case -10: str = "Unable to write to the NVM device"; break;
62               case -11: str = "Invalid partition type specified"; break;
63               case -12: str = "Invalid NVM_Object id specified"; break;
64               case -13: str = "NVM_Object already has the maximum number "
65                                 "of partitions"; break;
66               case -14: str = "Insufficient space in partition for the "
67                                 "requested write sub-function"; break;
68               case -15: str = "Insufficient data buffer space for the "
69                                 "requested read record sub-function"; break;
70               case -16: str = "Scratch buffer required for the write/delete "
71                                 "sub-function"; break;
72               case -17: str = "Insufficient space in the NVM_Object for the "
73                                 "requested create sub-function"; break;
74               case -18: str = "Invalid value specified in the partition_rec "
75                                 "argument"; break;
76               case -19: str = "Record oriented I/O not supported for this "
77                                 "partition"; break;
78               case -20: str = "Bad format of record to be written or "
79                                 "required keyword variable not "
80                                 "specified"; break;
81               default: str = "Unknown SAL status code"; break;
82         }
83         return str;
84 }
85
86 void __init
87 ia64_sal_handler_init (void *entry_point, void *gpval)
88 {
89         /* fill in the SAL procedure descriptor and point ia64_sal to it: */
90         pdesc.addr = entry_point;
91         pdesc.gpval = gpval;
92         ia64_sal = (ia64_sal_handler) &pdesc;
93 }
94
95 static void __init
96 check_versions (struct ia64_sal_systab *systab)
97 {
98         sal_revision = (systab->sal_rev_major << 8) | systab->sal_rev_minor;
99         sal_version = (systab->sal_b_rev_major << 8) | systab->sal_b_rev_minor;
100
101         /* Check for broken firmware */
102         if ((sal_revision == SAL_VERSION_CODE(49, 29))
103             && (sal_version == SAL_VERSION_CODE(49, 29)))
104         {
105                 /*
106                  * Old firmware for zx2000 prototypes have this weird version number,
107                  * reset it to something sane.
108                  */
109                 sal_revision = SAL_VERSION_CODE(2, 8);
110                 sal_version = SAL_VERSION_CODE(0, 0);
111         }
112 }
113
114 static void __init
115 sal_desc_entry_point (void *p)
116 {
117         struct ia64_sal_desc_entry_point *ep = p;
118         ia64_pal_handler_init(__va(ep->pal_proc));
119         ia64_sal_handler_init(__va(ep->sal_proc), __va(ep->gp));
120 }
121
122 #ifdef CONFIG_SMP
123 static void __init
124 set_smp_redirect (int flag)
125 {
126 #ifndef CONFIG_HOTPLUG_CPU
127         if (no_int_routing)
128                 smp_int_redirect &= ~flag;
129         else
130                 smp_int_redirect |= flag;
131 #else
132         /*
133          * For CPU Hotplug we dont want to do any chipset supported
134          * interrupt redirection. The reason is this would require that
135          * All interrupts be stopped and hard bind the irq to a cpu.
136          * Later when the interrupt is fired we need to set the redir hint
137          * on again in the vector. This is combersome for something that the
138          * user mode irq balancer will solve anyways.
139          */
140         no_int_routing=1;
141         smp_int_redirect &= ~flag;
142 #endif
143 }
144 #else
145 #define set_smp_redirect(flag)  do { } while (0)
146 #endif
147
148 static void __init
149 sal_desc_platform_feature (void *p)
150 {
151         struct ia64_sal_desc_platform_feature *pf = p;
152         sal_platform_features = pf->feature_mask;
153
154         printk(KERN_INFO "SAL Platform features:");
155         if (!sal_platform_features) {
156                 printk(" None\n");
157                 return;
158         }
159
160         if (sal_platform_features & IA64_SAL_PLATFORM_FEATURE_BUS_LOCK)
161                 printk(" BusLock");
162         if (sal_platform_features & IA64_SAL_PLATFORM_FEATURE_IRQ_REDIR_HINT) {
163                 printk(" IRQ_Redirection");
164                 set_smp_redirect(SMP_IRQ_REDIRECTION);
165         }
166         if (sal_platform_features & IA64_SAL_PLATFORM_FEATURE_IPI_REDIR_HINT) {
167                 printk(" IPI_Redirection");
168                 set_smp_redirect(SMP_IPI_REDIRECTION);
169         }
170         if (sal_platform_features & IA64_SAL_PLATFORM_FEATURE_ITC_DRIFT)
171                 printk(" ITC_Drift");
172         printk("\n");
173 }
174
175 #ifdef CONFIG_SMP
176 static void __init
177 sal_desc_ap_wakeup (void *p)
178 {
179         struct ia64_sal_desc_ap_wakeup *ap = p;
180
181         switch (ap->mechanism) {
182         case IA64_SAL_AP_EXTERNAL_INT:
183                 ap_wakeup_vector = ap->vector;
184                 printk(KERN_INFO "SAL: AP wakeup using external interrupt "
185                                 "vector 0x%lx\n", ap_wakeup_vector);
186                 break;
187         default:
188                 printk(KERN_ERR "SAL: AP wakeup mechanism unsupported!\n");
189                 break;
190         }
191 }
192
193 static void __init
194 chk_nointroute_opt(void)
195 {
196         char *cp;
197         extern char saved_command_line[];
198
199         for (cp = saved_command_line; *cp; ) {
200                 if (memcmp(cp, "nointroute", 10) == 0) {
201                         no_int_routing = 1;
202                         printk ("no_int_routing on\n");
203                         break;
204                 } else {
205                         while (*cp != ' ' && *cp)
206                                 ++cp;
207                         while (*cp == ' ')
208                                 ++cp;
209                 }
210         }
211 }
212
213 #else
214 static void __init sal_desc_ap_wakeup(void *p) { }
215 #endif
216
217 /*
218  * HP rx5670 firmware polls for interrupts during SAL_CACHE_FLUSH by reading
219  * cr.ivr, but it never writes cr.eoi.  This leaves any interrupt marked as
220  * "in-service" and masks other interrupts of equal or lower priority.
221  *
222  * HP internal defect reports: F1859, F2775, F3031.
223  */
224 static int sal_cache_flush_drops_interrupts;
225
226 void __init
227 check_sal_cache_flush (void)
228 {
229         unsigned long flags;
230         int cpu;
231         u64 vector, cache_type = 3;
232         struct ia64_sal_retval isrv;
233
234         cpu = get_cpu();
235         local_irq_save(flags);
236
237         /*
238          * Schedule a timer interrupt, wait until it's reported, and see if
239          * SAL_CACHE_FLUSH drops it.
240          */
241         ia64_set_itv(IA64_TIMER_VECTOR);
242         ia64_set_itm(ia64_get_itc() + 1000);
243
244         while (!ia64_get_irr(IA64_TIMER_VECTOR))
245                 cpu_relax();
246
247         SAL_CALL(isrv, SAL_CACHE_FLUSH, cache_type, 0, 0, 0, 0, 0, 0);
248
249         if (isrv.status)
250                 printk(KERN_ERR "SAL_CAL_FLUSH failed with %ld\n", isrv.status);
251
252         if (ia64_get_irr(IA64_TIMER_VECTOR)) {
253                 vector = ia64_get_ivr();
254                 ia64_eoi();
255                 WARN_ON(vector != IA64_TIMER_VECTOR);
256         } else {
257                 sal_cache_flush_drops_interrupts = 1;
258                 printk(KERN_ERR "SAL: SAL_CACHE_FLUSH drops interrupts; "
259                         "PAL_CACHE_FLUSH will be used instead\n");
260                 ia64_eoi();
261         }
262
263         local_irq_restore(flags);
264         put_cpu();
265 }
266
267 s64
268 ia64_sal_cache_flush (u64 cache_type)
269 {
270         struct ia64_sal_retval isrv;
271
272         if (sal_cache_flush_drops_interrupts) {
273                 unsigned long flags;
274                 u64 progress;
275                 s64 rc;
276
277                 progress = 0;
278                 local_irq_save(flags);
279                 rc = ia64_pal_cache_flush(cache_type,
280                         PAL_CACHE_FLUSH_INVALIDATE, &progress, NULL);
281                 local_irq_restore(flags);
282                 return rc;
283         }
284
285         SAL_CALL(isrv, SAL_CACHE_FLUSH, cache_type, 0, 0, 0, 0, 0, 0);
286         return isrv.status;
287 }
288
289 void __init
290 ia64_sal_init (struct ia64_sal_systab *systab)
291 {
292         char *p;
293         int i;
294
295         if (!systab) {
296                 printk(KERN_WARNING "Hmm, no SAL System Table.\n");
297                 return;
298         }
299
300         if (strncmp(systab->signature, "SST_", 4) != 0)
301                 printk(KERN_ERR "bad signature in system table!");
302
303         check_versions(systab);
304 #ifdef CONFIG_SMP
305         chk_nointroute_opt();
306 #endif
307
308         /* revisions are coded in BCD, so %x does the job for us */
309         printk(KERN_INFO "SAL %x.%x: %.32s %.32s%sversion %x.%x\n",
310                         SAL_MAJOR(sal_revision), SAL_MINOR(sal_revision),
311                         systab->oem_id, systab->product_id,
312                         systab->product_id[0] ? " " : "",
313                         SAL_MAJOR(sal_version), SAL_MINOR(sal_version));
314
315         p = (char *) (systab + 1);
316         for (i = 0; i < systab->entry_count; i++) {
317                 /*
318                  * The first byte of each entry type contains the type
319                  * descriptor.
320                  */
321                 switch (*p) {
322                 case SAL_DESC_ENTRY_POINT:
323                         sal_desc_entry_point(p);
324                         break;
325                 case SAL_DESC_PLATFORM_FEATURE:
326                         sal_desc_platform_feature(p);
327                         break;
328                 case SAL_DESC_PTC:
329                         ia64_ptc_domain_info = (ia64_sal_desc_ptc_t *)p;
330                         break;
331                 case SAL_DESC_AP_WAKEUP:
332                         sal_desc_ap_wakeup(p);
333                         break;
334                 }
335                 p += SAL_DESC_SIZE(*p);
336         }
337
338 }
339
340 int
341 ia64_sal_oemcall(struct ia64_sal_retval *isrvp, u64 oemfunc, u64 arg1,
342                  u64 arg2, u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7)
343 {
344         if (oemfunc < IA64_SAL_OEMFUNC_MIN || oemfunc > IA64_SAL_OEMFUNC_MAX)
345                 return -1;
346         SAL_CALL(*isrvp, oemfunc, arg1, arg2, arg3, arg4, arg5, arg6, arg7);
347         return 0;
348 }
349 EXPORT_SYMBOL(ia64_sal_oemcall);
350
351 int
352 ia64_sal_oemcall_nolock(struct ia64_sal_retval *isrvp, u64 oemfunc, u64 arg1,
353                         u64 arg2, u64 arg3, u64 arg4, u64 arg5, u64 arg6,
354                         u64 arg7)
355 {
356         if (oemfunc < IA64_SAL_OEMFUNC_MIN || oemfunc > IA64_SAL_OEMFUNC_MAX)
357                 return -1;
358         SAL_CALL_NOLOCK(*isrvp, oemfunc, arg1, arg2, arg3, arg4, arg5, arg6,
359                         arg7);
360         return 0;
361 }
362 EXPORT_SYMBOL(ia64_sal_oemcall_nolock);
363
364 int
365 ia64_sal_oemcall_reentrant(struct ia64_sal_retval *isrvp, u64 oemfunc,
366                            u64 arg1, u64 arg2, u64 arg3, u64 arg4, u64 arg5,
367                            u64 arg6, u64 arg7)
368 {
369         if (oemfunc < IA64_SAL_OEMFUNC_MIN || oemfunc > IA64_SAL_OEMFUNC_MAX)
370                 return -1;
371         SAL_CALL_REENTRANT(*isrvp, oemfunc, arg1, arg2, arg3, arg4, arg5, arg6,
372                            arg7);
373         return 0;
374 }
375 EXPORT_SYMBOL(ia64_sal_oemcall_reentrant);