1 // SPDX-License-Identifier: GPL-2.0-only
3 * System Abstraction Layer (SAL) interface routines.
5 * Copyright (C) 1998, 1999, 2001, 2003 Hewlett-Packard Co
6 * David Mosberger-Tang <davidm@hpl.hp.com>
7 * Copyright (C) 1999 VA Linux Systems
8 * Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
11 #include <linux/kernel.h>
12 #include <linux/init.h>
13 #include <linux/module.h>
14 #include <linux/spinlock.h>
15 #include <linux/string.h>
17 #include <asm/delay.h>
22 __cacheline_aligned DEFINE_SPINLOCK(sal_lock);
23 unsigned long sal_platform_features;
25 unsigned short sal_revision;
26 unsigned short sal_version;
28 #define SAL_MAJOR(x) ((x) >> 8)
29 #define SAL_MINOR(x) ((x) & 0xff)
32 void *addr; /* function entry point */
33 void *gpval; /* gp value to use */
37 default_handler (void)
42 ia64_sal_handler ia64_sal = (ia64_sal_handler) default_handler;
43 ia64_sal_desc_ptc_t *ia64_ptc_domain_info;
46 ia64_sal_strerror (long status)
50 case 0: str = "Call completed without error"; break;
51 case 1: str = "Effect a warm boot of the system to complete "
53 case -1: str = "Not implemented"; break;
54 case -2: str = "Invalid argument"; break;
55 case -3: str = "Call completed with error"; break;
56 case -4: str = "Virtual address not registered"; break;
57 case -5: str = "No information available"; break;
58 case -6: str = "Insufficient space to add the entry"; break;
59 case -7: str = "Invalid entry_addr value"; break;
60 case -8: str = "Invalid interrupt vector"; break;
61 case -9: str = "Requested memory not available"; break;
62 case -10: str = "Unable to write to the NVM device"; break;
63 case -11: str = "Invalid partition type specified"; break;
64 case -12: str = "Invalid NVM_Object id specified"; break;
65 case -13: str = "NVM_Object already has the maximum number "
66 "of partitions"; break;
67 case -14: str = "Insufficient space in partition for the "
68 "requested write sub-function"; break;
69 case -15: str = "Insufficient data buffer space for the "
70 "requested read record sub-function"; break;
71 case -16: str = "Scratch buffer required for the write/delete "
72 "sub-function"; break;
73 case -17: str = "Insufficient space in the NVM_Object for the "
74 "requested create sub-function"; break;
75 case -18: str = "Invalid value specified in the partition_rec "
77 case -19: str = "Record oriented I/O not supported for this "
79 case -20: str = "Bad format of record to be written or "
80 "required keyword variable not "
82 default: str = "Unknown SAL status code"; break;
88 ia64_sal_handler_init (void *entry_point, void *gpval)
90 /* fill in the SAL procedure descriptor and point ia64_sal to it: */
91 pdesc.addr = entry_point;
93 ia64_sal = (ia64_sal_handler) &pdesc;
97 check_versions (struct ia64_sal_systab *systab)
99 sal_revision = (systab->sal_rev_major << 8) | systab->sal_rev_minor;
100 sal_version = (systab->sal_b_rev_major << 8) | systab->sal_b_rev_minor;
102 /* Check for broken firmware */
103 if ((sal_revision == SAL_VERSION_CODE(49, 29))
104 && (sal_version == SAL_VERSION_CODE(49, 29)))
107 * Old firmware for zx2000 prototypes have this weird version number,
108 * reset it to something sane.
110 sal_revision = SAL_VERSION_CODE(2, 8);
111 sal_version = SAL_VERSION_CODE(0, 0);
114 if (ia64_platform_is("sn2") && (sal_revision == SAL_VERSION_CODE(2, 9)))
116 * SGI Altix has hard-coded version 2.9 in their prom
117 * but they actually implement 3.2, so let's fix it here.
119 sal_revision = SAL_VERSION_CODE(3, 2);
123 sal_desc_entry_point (void *p)
125 struct ia64_sal_desc_entry_point *ep = p;
126 ia64_pal_handler_init(__va(ep->pal_proc));
127 ia64_sal_handler_init(__va(ep->sal_proc), __va(ep->gp));
132 set_smp_redirect (int flag)
134 #ifndef CONFIG_HOTPLUG_CPU
136 smp_int_redirect &= ~flag;
138 smp_int_redirect |= flag;
141 * For CPU Hotplug we dont want to do any chipset supported
142 * interrupt redirection. The reason is this would require that
143 * All interrupts be stopped and hard bind the irq to a cpu.
144 * Later when the interrupt is fired we need to set the redir hint
145 * on again in the vector. This is cumbersome for something that the
146 * user mode irq balancer will solve anyways.
149 smp_int_redirect &= ~flag;
153 #define set_smp_redirect(flag) do { } while (0)
157 sal_desc_platform_feature (void *p)
159 struct ia64_sal_desc_platform_feature *pf = p;
160 sal_platform_features = pf->feature_mask;
162 printk(KERN_INFO "SAL Platform features:");
163 if (!sal_platform_features) {
168 if (sal_platform_features & IA64_SAL_PLATFORM_FEATURE_BUS_LOCK)
170 if (sal_platform_features & IA64_SAL_PLATFORM_FEATURE_IRQ_REDIR_HINT) {
171 printk(" IRQ_Redirection");
172 set_smp_redirect(SMP_IRQ_REDIRECTION);
174 if (sal_platform_features & IA64_SAL_PLATFORM_FEATURE_IPI_REDIR_HINT) {
175 printk(" IPI_Redirection");
176 set_smp_redirect(SMP_IPI_REDIRECTION);
178 if (sal_platform_features & IA64_SAL_PLATFORM_FEATURE_ITC_DRIFT)
179 printk(" ITC_Drift");
185 sal_desc_ap_wakeup (void *p)
187 struct ia64_sal_desc_ap_wakeup *ap = p;
189 switch (ap->mechanism) {
190 case IA64_SAL_AP_EXTERNAL_INT:
191 ap_wakeup_vector = ap->vector;
192 printk(KERN_INFO "SAL: AP wakeup using external interrupt "
193 "vector 0x%lx\n", ap_wakeup_vector);
196 printk(KERN_ERR "SAL: AP wakeup mechanism unsupported!\n");
202 chk_nointroute_opt(void)
206 for (cp = boot_command_line; *cp; ) {
207 if (memcmp(cp, "nointroute", 10) == 0) {
209 printk ("no_int_routing on\n");
212 while (*cp != ' ' && *cp)
221 static void __init sal_desc_ap_wakeup(void *p) { }
225 * HP rx5670 firmware polls for interrupts during SAL_CACHE_FLUSH by reading
226 * cr.ivr, but it never writes cr.eoi. This leaves any interrupt marked as
227 * "in-service" and masks other interrupts of equal or lower priority.
229 * HP internal defect reports: F1859, F2775, F3031.
231 static int sal_cache_flush_drops_interrupts;
234 force_pal_cache_flush(char *str)
236 sal_cache_flush_drops_interrupts = 1;
239 early_param("force_pal_cache_flush", force_pal_cache_flush);
242 check_sal_cache_flush (void)
246 u64 vector, cache_type = 3;
247 struct ia64_sal_retval isrv;
249 if (sal_cache_flush_drops_interrupts)
253 local_irq_save(flags);
256 * Send ourselves a timer interrupt, wait until it's reported, and see
257 * if SAL_CACHE_FLUSH drops it.
259 platform_send_ipi(cpu, IA64_TIMER_VECTOR, IA64_IPI_DM_INT, 0);
261 while (!ia64_get_irr(IA64_TIMER_VECTOR))
264 SAL_CALL(isrv, SAL_CACHE_FLUSH, cache_type, 0, 0, 0, 0, 0, 0);
267 printk(KERN_ERR "SAL_CAL_FLUSH failed with %ld\n", isrv.status);
269 if (ia64_get_irr(IA64_TIMER_VECTOR)) {
270 vector = ia64_get_ivr();
272 WARN_ON(vector != IA64_TIMER_VECTOR);
274 sal_cache_flush_drops_interrupts = 1;
275 printk(KERN_ERR "SAL: SAL_CACHE_FLUSH drops interrupts; "
276 "PAL_CACHE_FLUSH will be used instead\n");
280 local_irq_restore(flags);
285 ia64_sal_cache_flush (u64 cache_type)
287 struct ia64_sal_retval isrv;
289 if (sal_cache_flush_drops_interrupts) {
295 local_irq_save(flags);
296 rc = ia64_pal_cache_flush(cache_type,
297 PAL_CACHE_FLUSH_INVALIDATE, &progress, NULL);
298 local_irq_restore(flags);
302 SAL_CALL(isrv, SAL_CACHE_FLUSH, cache_type, 0, 0, 0, 0, 0, 0);
305 EXPORT_SYMBOL_GPL(ia64_sal_cache_flush);
308 ia64_sal_init (struct ia64_sal_systab *systab)
314 printk(KERN_WARNING "Hmm, no SAL System Table.\n");
318 if (strncmp(systab->signature, "SST_", 4) != 0)
319 printk(KERN_ERR "bad signature in system table!");
321 check_versions(systab);
323 chk_nointroute_opt();
326 /* revisions are coded in BCD, so %x does the job for us */
327 printk(KERN_INFO "SAL %x.%x: %.32s %.32s%sversion %x.%x\n",
328 SAL_MAJOR(sal_revision), SAL_MINOR(sal_revision),
329 systab->oem_id, systab->product_id,
330 systab->product_id[0] ? " " : "",
331 SAL_MAJOR(sal_version), SAL_MINOR(sal_version));
333 p = (char *) (systab + 1);
334 for (i = 0; i < systab->entry_count; i++) {
336 * The first byte of each entry type contains the type
340 case SAL_DESC_ENTRY_POINT:
341 sal_desc_entry_point(p);
343 case SAL_DESC_PLATFORM_FEATURE:
344 sal_desc_platform_feature(p);
347 ia64_ptc_domain_info = (ia64_sal_desc_ptc_t *)p;
349 case SAL_DESC_AP_WAKEUP:
350 sal_desc_ap_wakeup(p);
353 p += SAL_DESC_SIZE(*p);
359 ia64_sal_oemcall(struct ia64_sal_retval *isrvp, u64 oemfunc, u64 arg1,
360 u64 arg2, u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7)
362 if (oemfunc < IA64_SAL_OEMFUNC_MIN || oemfunc > IA64_SAL_OEMFUNC_MAX)
364 SAL_CALL(*isrvp, oemfunc, arg1, arg2, arg3, arg4, arg5, arg6, arg7);
367 EXPORT_SYMBOL(ia64_sal_oemcall);
370 ia64_sal_oemcall_nolock(struct ia64_sal_retval *isrvp, u64 oemfunc, u64 arg1,
371 u64 arg2, u64 arg3, u64 arg4, u64 arg5, u64 arg6,
374 if (oemfunc < IA64_SAL_OEMFUNC_MIN || oemfunc > IA64_SAL_OEMFUNC_MAX)
376 SAL_CALL_NOLOCK(*isrvp, oemfunc, arg1, arg2, arg3, arg4, arg5, arg6,
380 EXPORT_SYMBOL(ia64_sal_oemcall_nolock);
383 ia64_sal_oemcall_reentrant(struct ia64_sal_retval *isrvp, u64 oemfunc,
384 u64 arg1, u64 arg2, u64 arg3, u64 arg4, u64 arg5,
387 if (oemfunc < IA64_SAL_OEMFUNC_MIN || oemfunc > IA64_SAL_OEMFUNC_MAX)
389 SAL_CALL_REENTRANT(*isrvp, oemfunc, arg1, arg2, arg3, arg4, arg5, arg6,
393 EXPORT_SYMBOL(ia64_sal_oemcall_reentrant);
396 ia64_sal_freq_base (unsigned long which, unsigned long *ticks_per_second,
397 unsigned long *drift_info)
399 struct ia64_sal_retval isrv;
401 SAL_CALL(isrv, SAL_FREQ_BASE, which, 0, 0, 0, 0, 0, 0);
402 *ticks_per_second = isrv.v0;
403 *drift_info = isrv.v1;
406 EXPORT_SYMBOL_GPL(ia64_sal_freq_base);