1
2
3
4
5
6
7
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);
22unsigned long sal_platform_features;
23
24unsigned short sal_revision;
25unsigned short sal_version;
26
27#define SAL_MAJOR(x) ((x) >> 8)
28#define SAL_MINOR(x) ((x) & 0xff)
29
30static struct {
31 void *addr;
32 void *gpval;
33} pdesc;
34
35static long
36default_handler (void)
37{
38 return -1;
39}
40
41ia64_sal_handler ia64_sal = (ia64_sal_handler) default_handler;
42ia64_sal_desc_ptc_t *ia64_ptc_domain_info;
43
44const char *
45ia64_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
86void __init
87ia64_sal_handler_init (void *entry_point, void *gpval)
88{
89
90 pdesc.addr = entry_point;
91 pdesc.gpval = gpval;
92 ia64_sal = (ia64_sal_handler) &pdesc;
93}
94
95static void __init
96check_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
102 if ((sal_revision == SAL_VERSION_CODE(49, 29))
103 && (sal_version == SAL_VERSION_CODE(49, 29)))
104 {
105
106
107
108
109 sal_revision = SAL_VERSION_CODE(2, 8);
110 sal_version = SAL_VERSION_CODE(0, 0);
111 }
112
113 if (ia64_platform_is("sn2") && (sal_revision == SAL_VERSION_CODE(2, 9)))
114
115
116
117
118 sal_revision = SAL_VERSION_CODE(3, 2);
119}
120
121static void __init
122sal_desc_entry_point (void *p)
123{
124 struct ia64_sal_desc_entry_point *ep = p;
125 ia64_pal_handler_init(__va(ep->pal_proc));
126 ia64_sal_handler_init(__va(ep->sal_proc), __va(ep->gp));
127}
128
129#ifdef CONFIG_SMP
130static void __init
131set_smp_redirect (int flag)
132{
133#ifndef CONFIG_HOTPLUG_CPU
134 if (no_int_routing)
135 smp_int_redirect &= ~flag;
136 else
137 smp_int_redirect |= flag;
138#else
139
140
141
142
143
144
145
146
147 no_int_routing=1;
148 smp_int_redirect &= ~flag;
149#endif
150}
151#else
152#define set_smp_redirect(flag) do { } while (0)
153#endif
154
155static void __init
156sal_desc_platform_feature (void *p)
157{
158 struct ia64_sal_desc_platform_feature *pf = p;
159 sal_platform_features = pf->feature_mask;
160
161 printk(KERN_INFO "SAL Platform features:");
162 if (!sal_platform_features) {
163 printk(" None\n");
164 return;
165 }
166
167 if (sal_platform_features & IA64_SAL_PLATFORM_FEATURE_BUS_LOCK)
168 printk(" BusLock");
169 if (sal_platform_features & IA64_SAL_PLATFORM_FEATURE_IRQ_REDIR_HINT) {
170 printk(" IRQ_Redirection");
171 set_smp_redirect(SMP_IRQ_REDIRECTION);
172 }
173 if (sal_platform_features & IA64_SAL_PLATFORM_FEATURE_IPI_REDIR_HINT) {
174 printk(" IPI_Redirection");
175 set_smp_redirect(SMP_IPI_REDIRECTION);
176 }
177 if (sal_platform_features & IA64_SAL_PLATFORM_FEATURE_ITC_DRIFT)
178 printk(" ITC_Drift");
179 printk("\n");
180}
181
182#ifdef CONFIG_SMP
183static void __init
184sal_desc_ap_wakeup (void *p)
185{
186 struct ia64_sal_desc_ap_wakeup *ap = p;
187
188 switch (ap->mechanism) {
189 case IA64_SAL_AP_EXTERNAL_INT:
190 ap_wakeup_vector = ap->vector;
191 printk(KERN_INFO "SAL: AP wakeup using external interrupt "
192 "vector 0x%lx\n", ap_wakeup_vector);
193 break;
194 default:
195 printk(KERN_ERR "SAL: AP wakeup mechanism unsupported!\n");
196 break;
197 }
198}
199
200static void __init
201chk_nointroute_opt(void)
202{
203 char *cp;
204
205 for (cp = boot_command_line; *cp; ) {
206 if (memcmp(cp, "nointroute", 10) == 0) {
207 no_int_routing = 1;
208 printk ("no_int_routing on\n");
209 break;
210 } else {
211 while (*cp != ' ' && *cp)
212 ++cp;
213 while (*cp == ' ')
214 ++cp;
215 }
216 }
217}
218
219#else
220static void __init sal_desc_ap_wakeup(void *p) { }
221#endif
222
223
224
225
226
227
228
229
230static int sal_cache_flush_drops_interrupts;
231
232static int __init
233force_pal_cache_flush(char *str)
234{
235 sal_cache_flush_drops_interrupts = 1;
236 return 0;
237}
238early_param("force_pal_cache_flush", force_pal_cache_flush);
239
240void __init
241check_sal_cache_flush (void)
242{
243 unsigned long flags;
244 int cpu;
245 u64 vector, cache_type = 3;
246 struct ia64_sal_retval isrv;
247
248 if (sal_cache_flush_drops_interrupts)
249 return;
250
251 cpu = get_cpu();
252 local_irq_save(flags);
253
254
255
256
257
258 platform_send_ipi(cpu, IA64_TIMER_VECTOR, IA64_IPI_DM_INT, 0);
259
260 while (!ia64_get_irr(IA64_TIMER_VECTOR))
261 cpu_relax();
262
263 SAL_CALL(isrv, SAL_CACHE_FLUSH, cache_type, 0, 0, 0, 0, 0, 0);
264
265 if (isrv.status)
266 printk(KERN_ERR "SAL_CAL_FLUSH failed with %ld\n", isrv.status);
267
268 if (ia64_get_irr(IA64_TIMER_VECTOR)) {
269 vector = ia64_get_ivr();
270 ia64_eoi();
271 WARN_ON(vector != IA64_TIMER_VECTOR);
272 } else {
273 sal_cache_flush_drops_interrupts = 1;
274 printk(KERN_ERR "SAL: SAL_CACHE_FLUSH drops interrupts; "
275 "PAL_CACHE_FLUSH will be used instead\n");
276 ia64_eoi();
277 }
278
279 local_irq_restore(flags);
280 put_cpu();
281}
282
283s64
284ia64_sal_cache_flush (u64 cache_type)
285{
286 struct ia64_sal_retval isrv;
287
288 if (sal_cache_flush_drops_interrupts) {
289 unsigned long flags;
290 u64 progress;
291 s64 rc;
292
293 progress = 0;
294 local_irq_save(flags);
295 rc = ia64_pal_cache_flush(cache_type,
296 PAL_CACHE_FLUSH_INVALIDATE, &progress, NULL);
297 local_irq_restore(flags);
298 return rc;
299 }
300
301 SAL_CALL(isrv, SAL_CACHE_FLUSH, cache_type, 0, 0, 0, 0, 0, 0);
302 return isrv.status;
303}
304EXPORT_SYMBOL_GPL(ia64_sal_cache_flush);
305
306void __init
307ia64_sal_init (struct ia64_sal_systab *systab)
308{
309 char *p;
310 int i;
311
312 if (!systab) {
313 printk(KERN_WARNING "Hmm, no SAL System Table.\n");
314 return;
315 }
316
317 if (strncmp(systab->signature, "SST_", 4) != 0)
318 printk(KERN_ERR "bad signature in system table!");
319
320 check_versions(systab);
321#ifdef CONFIG_SMP
322 chk_nointroute_opt();
323#endif
324
325
326 printk(KERN_INFO "SAL %x.%x: %.32s %.32s%sversion %x.%x\n",
327 SAL_MAJOR(sal_revision), SAL_MINOR(sal_revision),
328 systab->oem_id, systab->product_id,
329 systab->product_id[0] ? " " : "",
330 SAL_MAJOR(sal_version), SAL_MINOR(sal_version));
331
332 p = (char *) (systab + 1);
333 for (i = 0; i < systab->entry_count; i++) {
334
335
336
337
338 switch (*p) {
339 case SAL_DESC_ENTRY_POINT:
340 sal_desc_entry_point(p);
341 break;
342 case SAL_DESC_PLATFORM_FEATURE:
343 sal_desc_platform_feature(p);
344 break;
345 case SAL_DESC_PTC:
346 ia64_ptc_domain_info = (ia64_sal_desc_ptc_t *)p;
347 break;
348 case SAL_DESC_AP_WAKEUP:
349 sal_desc_ap_wakeup(p);
350 break;
351 }
352 p += SAL_DESC_SIZE(*p);
353 }
354
355}
356
357int
358ia64_sal_oemcall(struct ia64_sal_retval *isrvp, u64 oemfunc, u64 arg1,
359 u64 arg2, u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7)
360{
361 if (oemfunc < IA64_SAL_OEMFUNC_MIN || oemfunc > IA64_SAL_OEMFUNC_MAX)
362 return -1;
363 SAL_CALL(*isrvp, oemfunc, arg1, arg2, arg3, arg4, arg5, arg6, arg7);
364 return 0;
365}
366EXPORT_SYMBOL(ia64_sal_oemcall);
367
368int
369ia64_sal_oemcall_nolock(struct ia64_sal_retval *isrvp, u64 oemfunc, u64 arg1,
370 u64 arg2, u64 arg3, u64 arg4, u64 arg5, u64 arg6,
371 u64 arg7)
372{
373 if (oemfunc < IA64_SAL_OEMFUNC_MIN || oemfunc > IA64_SAL_OEMFUNC_MAX)
374 return -1;
375 SAL_CALL_NOLOCK(*isrvp, oemfunc, arg1, arg2, arg3, arg4, arg5, arg6,
376 arg7);
377 return 0;
378}
379EXPORT_SYMBOL(ia64_sal_oemcall_nolock);
380
381int
382ia64_sal_oemcall_reentrant(struct ia64_sal_retval *isrvp, u64 oemfunc,
383 u64 arg1, u64 arg2, u64 arg3, u64 arg4, u64 arg5,
384 u64 arg6, u64 arg7)
385{
386 if (oemfunc < IA64_SAL_OEMFUNC_MIN || oemfunc > IA64_SAL_OEMFUNC_MAX)
387 return -1;
388 SAL_CALL_REENTRANT(*isrvp, oemfunc, arg1, arg2, arg3, arg4, arg5, arg6,
389 arg7);
390 return 0;
391}
392EXPORT_SYMBOL(ia64_sal_oemcall_reentrant);
393
394long
395ia64_sal_freq_base (unsigned long which, unsigned long *ticks_per_second,
396 unsigned long *drift_info)
397{
398 struct ia64_sal_retval isrv;
399
400 SAL_CALL(isrv, SAL_FREQ_BASE, which, 0, 0, 0, 0, 0, 0);
401 *ticks_per_second = isrv.v0;
402 *drift_info = isrv.v1;
403 return isrv.status;
404}
405EXPORT_SYMBOL_GPL(ia64_sal_freq_base);
406
