Remove obsolete #include <linux/config.h>
[linux-3.10.git] / 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 static void __init
227 check_sal_cache_flush (void)
228 {
229         unsigned long flags;
230         int cpu;
231         u64 vector;
232
233         cpu = get_cpu();
234         local_irq_save(flags);
235
236         /*
237          * Schedule a timer interrupt, wait until it's reported, and see if
238          * SAL_CACHE_FLUSH drops it.
239          */
240         ia64_set_itv(IA64_TIMER_VECTOR);
241         ia64_set_itm(ia64_get_itc() + 1000);
242
243         while (!ia64_get_irr(IA64_TIMER_VECTOR))
244                 cpu_relax();
245
246         ia64_sal_cache_flush(3);
247
248         if (ia64_get_irr(IA64_TIMER_VECTOR)) {
249                 vector = ia64_get_ivr();
250                 ia64_eoi();
251                 WARN_ON(vector != IA64_TIMER_VECTOR);
252         } else {
253                 sal_cache_flush_drops_interrupts = 1;
254                 printk(KERN_ERR "SAL: SAL_CACHE_FLUSH drops interrupts; "
255                         "PAL_CACHE_FLUSH will be used instead\n");
256                 ia64_eoi();
257         }
258
259         local_irq_restore(flags);
260         put_cpu();
261 }
262
263 s64
264 ia64_sal_cache_flush (u64 cache_type)
265 {
266         struct ia64_sal_retval isrv;
267
268         if (sal_cache_flush_drops_interrupts) {
269                 unsigned long flags;
270                 u64 progress;
271                 s64 rc;
272
273                 progress = 0;
274                 local_irq_save(flags);
275                 rc = ia64_pal_cache_flush(cache_type,
276                         PAL_CACHE_FLUSH_INVALIDATE, &progress, NULL);
277                 local_irq_restore(flags);
278                 return rc;
279         }
280
281         SAL_CALL(isrv, SAL_CACHE_FLUSH, cache_type, 0, 0, 0, 0, 0, 0);
282         return isrv.status;
283 }
284
285 void __init
286 ia64_sal_init (struct ia64_sal_systab *systab)
287 {
288         char *p;
289         int i;
290
291         if (!systab) {
292                 printk(KERN_WARNING "Hmm, no SAL System Table.\n");
293                 return;
294         }
295
296         if (strncmp(systab->signature, "SST_", 4) != 0)
297                 printk(KERN_ERR "bad signature in system table!");
298
299         check_versions(systab);
300 #ifdef CONFIG_SMP
301         chk_nointroute_opt();
302 #endif
303
304         /* revisions are coded in BCD, so %x does the job for us */
305         printk(KERN_INFO "SAL %x.%x: %.32s %.32s%sversion %x.%x\n",
306                         SAL_MAJOR(sal_revision), SAL_MINOR(sal_revision),
307                         systab->oem_id, systab->product_id,
308                         systab->product_id[0] ? " " : "",
309                         SAL_MAJOR(sal_version), SAL_MINOR(sal_version));
310
311         p = (char *) (systab + 1);
312         for (i = 0; i < systab->entry_count; i++) {
313                 /*
314                  * The first byte of each entry type contains the type
315                  * descriptor.
316                  */
317                 switch (*p) {
318                 case SAL_DESC_ENTRY_POINT:
319                         sal_desc_entry_point(p);
320                         break;
321                 case SAL_DESC_PLATFORM_FEATURE:
322                         sal_desc_platform_feature(p);
323                         break;
324                 case SAL_DESC_PTC:
325                         ia64_ptc_domain_info = (ia64_sal_desc_ptc_t *)p;
326                         break;
327                 case SAL_DESC_AP_WAKEUP:
328                         sal_desc_ap_wakeup(p);
329                         break;
330                 }
331                 p += SAL_DESC_SIZE(*p);
332         }
333
334         check_sal_cache_flush();
335 }
336
337 int
338 ia64_sal_oemcall(struct ia64_sal_retval *isrvp, u64 oemfunc, u64 arg1,
339                  u64 arg2, u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7)
340 {
341         if (oemfunc < IA64_SAL_OEMFUNC_MIN || oemfunc > IA64_SAL_OEMFUNC_MAX)
342                 return -1;
343         SAL_CALL(*isrvp, oemfunc, arg1, arg2, arg3, arg4, arg5, arg6, arg7);
344         return 0;
345 }
346 EXPORT_SYMBOL(ia64_sal_oemcall);
347
348 int
349 ia64_sal_oemcall_nolock(struct ia64_sal_retval *isrvp, u64 oemfunc, u64 arg1,
350                         u64 arg2, u64 arg3, u64 arg4, u64 arg5, u64 arg6,
351                         u64 arg7)
352 {
353         if (oemfunc < IA64_SAL_OEMFUNC_MIN || oemfunc > IA64_SAL_OEMFUNC_MAX)
354                 return -1;
355         SAL_CALL_NOLOCK(*isrvp, oemfunc, arg1, arg2, arg3, arg4, arg5, arg6,
356                         arg7);
357         return 0;
358 }
359 EXPORT_SYMBOL(ia64_sal_oemcall_nolock);
360
361 int
362 ia64_sal_oemcall_reentrant(struct ia64_sal_retval *isrvp, u64 oemfunc,
363                            u64 arg1, u64 arg2, u64 arg3, u64 arg4, u64 arg5,
364                            u64 arg6, u64 arg7)
365 {
366         if (oemfunc < IA64_SAL_OEMFUNC_MIN || oemfunc > IA64_SAL_OEMFUNC_MAX)
367                 return -1;
368         SAL_CALL_REENTRANT(*isrvp, oemfunc, arg1, arg2, arg3, arg4, arg5, arg6,
369                            arg7);
370         return 0;
371 }
372 EXPORT_SYMBOL(ia64_sal_oemcall_reentrant);