sal.c
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:6k
- /*
- * System Abstraction Layer (SAL) interface routines.
- *
- * Copyright (C) 1998, 1999, 2001 Hewlett-Packard Co
- * David Mosberger-Tang <davidm@hpl.hp.com>
- * Copyright (C) 1999 VA Linux Systems
- * Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
- */
- #include <linux/config.h>
- #include <linux/kernel.h>
- #include <linux/init.h>
- #include <linux/smp.h>
- #include <linux/spinlock.h>
- #include <linux/string.h>
- #include <asm/page.h>
- #include <asm/sal.h>
- #include <asm/pal.h>
- spinlock_t sal_lock __cacheline_aligned = SPIN_LOCK_UNLOCKED;
- unsigned long sal_platform_features;
- static struct {
- void *addr; /* function entry point */
- void *gpval; /* gp value to use */
- } pdesc;
- static long
- default_handler (void)
- {
- return -1;
- }
- ia64_sal_handler ia64_sal = (ia64_sal_handler) default_handler;
- ia64_sal_desc_ptc_t *ia64_ptc_domain_info;
- const char *
- ia64_sal_strerror (long status)
- {
- const char *str;
- switch (status) {
- case 0: str = "Call completed without error"; break;
- case 1: str = "Effect a warm boot of the system to complete "
- "the update"; break;
- case -1: str = "Not implemented"; break;
- case -2: str = "Invalid argument"; break;
- case -3: str = "Call completed with error"; break;
- case -4: str = "Virtual address not registered"; break;
- case -5: str = "No information available"; break;
- case -6: str = "Insufficient space to add the entry"; break;
- case -7: str = "Invalid entry_addr value"; break;
- case -8: str = "Invalid interrupt vector"; break;
- case -9: str = "Requested memory not available"; break;
- case -10: str = "Unable to write to the NVM device"; break;
- case -11: str = "Invalid partition type specified"; break;
- case -12: str = "Invalid NVM_Object id specified"; break;
- case -13: str = "NVM_Object already has the maximum number "
- "of partitions"; break;
- case -14: str = "Insufficient space in partition for the "
- "requested write sub-function"; break;
- case -15: str = "Insufficient data buffer space for the "
- "requested read record sub-function"; break;
- case -16: str = "Scratch buffer required for the write/delete "
- "sub-function"; break;
- case -17: str = "Insufficient space in the NVM_Object for the "
- "requested create sub-function"; break;
- case -18: str = "Invalid value specified in the partition_rec "
- "argument"; break;
- case -19: str = "Record oriented I/O not supported for this "
- "partition"; break;
- case -20: str = "Bad format of record to be written or "
- "required keyword variable not "
- "specified"; break;
- default: str = "Unknown SAL status code"; break;
- }
- return str;
- }
- static void __init
- ia64_sal_handler_init (void *entry_point, void *gpval)
- {
- /* fill in the SAL procedure descriptor and point ia64_sal to it: */
- pdesc.addr = entry_point;
- pdesc.gpval = gpval;
- ia64_sal = (ia64_sal_handler) &pdesc;
- }
- void __init
- ia64_sal_init (struct ia64_sal_systab *systab)
- {
- unsigned long min, max;
- char *p;
- struct ia64_sal_desc_entry_point *ep;
- int i;
- if (!systab) {
- printk("Hmm, no SAL System Table.n");
- return;
- }
- if (strncmp(systab->signature, "SST_", 4) != 0)
- printk("bad signature in system table!");
- /*
- * revisions are coded in BCD, so %x does the job for us
- */
- printk("SAL v%x.%02x: oem=%.32s, product=%.32sn",
- systab->sal_rev_major, systab->sal_rev_minor,
- systab->oem_id, systab->product_id);
- min = ~0UL;
- max = 0;
- p = (char *) (systab + 1);
- for (i = 0; i < systab->entry_count; i++) {
- /*
- * The first byte of each entry type contains the type desciptor.
- */
- switch (*p) {
- case SAL_DESC_ENTRY_POINT:
- ep = (struct ia64_sal_desc_entry_point *) p;
- printk("SAL: entry: pal_proc=0x%lx, sal_proc=0x%lxn",
- ep->pal_proc, ep->sal_proc);
- ia64_pal_handler_init(__va(ep->pal_proc));
- ia64_sal_handler_init(__va(ep->sal_proc), __va(ep->gp));
- break;
- case SAL_DESC_PTC:
- ia64_ptc_domain_info = (ia64_sal_desc_ptc_t *)p;
- break;
- case SAL_DESC_AP_WAKEUP:
- #ifdef CONFIG_SMP
- {
- struct ia64_sal_desc_ap_wakeup *ap = (void *) p;
- switch (ap->mechanism) {
- case IA64_SAL_AP_EXTERNAL_INT:
- ap_wakeup_vector = ap->vector;
- printk("SAL: AP wakeup using external interrupt "
- "vector 0x%lxn", ap_wakeup_vector);
- break;
- default:
- printk("SAL: AP wakeup mechanism unsupported!n");
- break;
- }
- break;
- }
- #endif
- case SAL_DESC_PLATFORM_FEATURE:
- {
- struct ia64_sal_desc_platform_feature *pf = (void *) p;
- sal_platform_features = pf->feature_mask;
- printk("SAL: Platform features ");
- if (pf->feature_mask & IA64_SAL_PLATFORM_FEATURE_BUS_LOCK)
- printk("BusLock ");
- if (pf->feature_mask & IA64_SAL_PLATFORM_FEATURE_IRQ_REDIR_HINT) {
- printk("IRQ_Redirection ");
- #ifdef CONFIG_SMP
- if (no_int_routing)
- smp_int_redirect &= ~SMP_IRQ_REDIRECTION;
- else
- smp_int_redirect |= SMP_IRQ_REDIRECTION;
- #endif
- }
- if (pf->feature_mask & IA64_SAL_PLATFORM_FEATURE_IPI_REDIR_HINT) {
- printk("IPI_Redirection ");
- #ifdef CONFIG_SMP
- if (no_int_routing)
- smp_int_redirect &= ~SMP_IPI_REDIRECTION;
- else
- smp_int_redirect |= SMP_IPI_REDIRECTION;
- #endif
- }
- if (pf->feature_mask & IA64_SAL_PLATFORM_FEATURE_ITC_DRIFT)
- printk("ITC_Drift ");
- printk("n");
- break;
- }
- }
- p += SAL_DESC_SIZE(*p);
- }
- }