378 lines
9.7 KiB
C
378 lines
9.7 KiB
C
/*
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* System Abstraction Layer (SAL) interface routines.
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*
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* Copyright (C) 1998, 1999, 2001, 2003 Hewlett-Packard Co
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* David Mosberger-Tang <davidm@hpl.hp.com>
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* Copyright (C) 1999 VA Linux Systems
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* Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
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*/
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#include <linux/config.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/spinlock.h>
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#include <linux/string.h>
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#include <asm/delay.h>
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#include <asm/page.h>
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#include <asm/sal.h>
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#include <asm/pal.h>
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__cacheline_aligned DEFINE_SPINLOCK(sal_lock);
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unsigned long sal_platform_features;
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unsigned short sal_revision;
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unsigned short sal_version;
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#define SAL_MAJOR(x) ((x) >> 8)
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#define SAL_MINOR(x) ((x) & 0xff)
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static struct {
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void *addr; /* function entry point */
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void *gpval; /* gp value to use */
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} pdesc;
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static long
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default_handler (void)
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{
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return -1;
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}
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ia64_sal_handler ia64_sal = (ia64_sal_handler) default_handler;
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ia64_sal_desc_ptc_t *ia64_ptc_domain_info;
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const char *
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ia64_sal_strerror (long status)
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{
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const char *str;
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switch (status) {
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case 0: str = "Call completed without error"; break;
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case 1: str = "Effect a warm boot of the system to complete "
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"the update"; break;
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case -1: str = "Not implemented"; break;
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case -2: str = "Invalid argument"; break;
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case -3: str = "Call completed with error"; break;
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case -4: str = "Virtual address not registered"; break;
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case -5: str = "No information available"; break;
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case -6: str = "Insufficient space to add the entry"; break;
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case -7: str = "Invalid entry_addr value"; break;
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case -8: str = "Invalid interrupt vector"; break;
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case -9: str = "Requested memory not available"; break;
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case -10: str = "Unable to write to the NVM device"; break;
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case -11: str = "Invalid partition type specified"; break;
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case -12: str = "Invalid NVM_Object id specified"; break;
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case -13: str = "NVM_Object already has the maximum number "
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"of partitions"; break;
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case -14: str = "Insufficient space in partition for the "
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"requested write sub-function"; break;
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case -15: str = "Insufficient data buffer space for the "
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"requested read record sub-function"; break;
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case -16: str = "Scratch buffer required for the write/delete "
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"sub-function"; break;
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case -17: str = "Insufficient space in the NVM_Object for the "
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"requested create sub-function"; break;
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case -18: str = "Invalid value specified in the partition_rec "
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"argument"; break;
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case -19: str = "Record oriented I/O not supported for this "
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"partition"; break;
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case -20: str = "Bad format of record to be written or "
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"required keyword variable not "
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"specified"; break;
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default: str = "Unknown SAL status code"; break;
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}
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return str;
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}
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void __init
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ia64_sal_handler_init (void *entry_point, void *gpval)
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{
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/* fill in the SAL procedure descriptor and point ia64_sal to it: */
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pdesc.addr = entry_point;
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pdesc.gpval = gpval;
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ia64_sal = (ia64_sal_handler) &pdesc;
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}
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static void __init
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check_versions (struct ia64_sal_systab *systab)
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{
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sal_revision = (systab->sal_rev_major << 8) | systab->sal_rev_minor;
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sal_version = (systab->sal_b_rev_major << 8) | systab->sal_b_rev_minor;
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/* Check for broken firmware */
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if ((sal_revision == SAL_VERSION_CODE(49, 29))
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&& (sal_version == SAL_VERSION_CODE(49, 29)))
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{
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/*
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* Old firmware for zx2000 prototypes have this weird version number,
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* reset it to something sane.
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*/
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sal_revision = SAL_VERSION_CODE(2, 8);
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sal_version = SAL_VERSION_CODE(0, 0);
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}
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}
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static void __init
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sal_desc_entry_point (void *p)
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{
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struct ia64_sal_desc_entry_point *ep = p;
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ia64_pal_handler_init(__va(ep->pal_proc));
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ia64_sal_handler_init(__va(ep->sal_proc), __va(ep->gp));
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}
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#ifdef CONFIG_SMP
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static void __init
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set_smp_redirect (int flag)
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{
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#ifndef CONFIG_HOTPLUG_CPU
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if (no_int_routing)
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smp_int_redirect &= ~flag;
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else
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smp_int_redirect |= flag;
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#else
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/*
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* For CPU Hotplug we dont want to do any chipset supported
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* interrupt redirection. The reason is this would require that
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* All interrupts be stopped and hard bind the irq to a cpu.
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* Later when the interrupt is fired we need to set the redir hint
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* on again in the vector. This is combersome for something that the
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* user mode irq balancer will solve anyways.
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*/
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no_int_routing=1;
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smp_int_redirect &= ~flag;
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#endif
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}
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#else
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#define set_smp_redirect(flag) do { } while (0)
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#endif
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static void __init
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sal_desc_platform_feature (void *p)
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{
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struct ia64_sal_desc_platform_feature *pf = p;
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sal_platform_features = pf->feature_mask;
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printk(KERN_INFO "SAL Platform features:");
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if (!sal_platform_features) {
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printk(" None\n");
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return;
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}
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if (sal_platform_features & IA64_SAL_PLATFORM_FEATURE_BUS_LOCK)
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printk(" BusLock");
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if (sal_platform_features & IA64_SAL_PLATFORM_FEATURE_IRQ_REDIR_HINT) {
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printk(" IRQ_Redirection");
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set_smp_redirect(SMP_IRQ_REDIRECTION);
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}
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if (sal_platform_features & IA64_SAL_PLATFORM_FEATURE_IPI_REDIR_HINT) {
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printk(" IPI_Redirection");
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set_smp_redirect(SMP_IPI_REDIRECTION);
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}
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if (sal_platform_features & IA64_SAL_PLATFORM_FEATURE_ITC_DRIFT)
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printk(" ITC_Drift");
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printk("\n");
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}
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#ifdef CONFIG_SMP
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static void __init
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sal_desc_ap_wakeup (void *p)
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{
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struct ia64_sal_desc_ap_wakeup *ap = p;
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switch (ap->mechanism) {
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case IA64_SAL_AP_EXTERNAL_INT:
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ap_wakeup_vector = ap->vector;
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printk(KERN_INFO "SAL: AP wakeup using external interrupt "
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"vector 0x%lx\n", ap_wakeup_vector);
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break;
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default:
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printk(KERN_ERR "SAL: AP wakeup mechanism unsupported!\n");
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break;
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}
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}
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static void __init
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chk_nointroute_opt(void)
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{
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char *cp;
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extern char saved_command_line[];
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for (cp = saved_command_line; *cp; ) {
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if (memcmp(cp, "nointroute", 10) == 0) {
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no_int_routing = 1;
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printk ("no_int_routing on\n");
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break;
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} else {
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while (*cp != ' ' && *cp)
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++cp;
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while (*cp == ' ')
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++cp;
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}
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}
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}
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#else
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static void __init sal_desc_ap_wakeup(void *p) { }
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#endif
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/*
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* HP rx5670 firmware polls for interrupts during SAL_CACHE_FLUSH by reading
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* cr.ivr, but it never writes cr.eoi. This leaves any interrupt marked as
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* "in-service" and masks other interrupts of equal or lower priority.
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*
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* HP internal defect reports: F1859, F2775, F3031.
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*/
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static int sal_cache_flush_drops_interrupts;
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static void __init
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check_sal_cache_flush (void)
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{
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unsigned long flags, itv;
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int cpu;
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u64 vector;
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cpu = get_cpu();
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local_irq_save(flags);
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/*
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* Schedule a timer interrupt, wait until it's reported, and see if
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* SAL_CACHE_FLUSH drops it.
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*/
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itv = ia64_get_itv();
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BUG_ON((itv & (1 << 16)) == 0);
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ia64_set_itv(IA64_TIMER_VECTOR);
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ia64_set_itm(ia64_get_itc() + 1000);
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while (!ia64_get_irr(IA64_TIMER_VECTOR))
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cpu_relax();
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ia64_sal_cache_flush(3);
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if (ia64_get_irr(IA64_TIMER_VECTOR)) {
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vector = ia64_get_ivr();
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ia64_eoi();
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WARN_ON(vector != IA64_TIMER_VECTOR);
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} else {
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sal_cache_flush_drops_interrupts = 1;
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printk(KERN_ERR "SAL: SAL_CACHE_FLUSH drops interrupts; "
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"PAL_CACHE_FLUSH will be used instead\n");
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ia64_eoi();
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}
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ia64_set_itv(itv);
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local_irq_restore(flags);
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put_cpu();
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}
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s64
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ia64_sal_cache_flush (u64 cache_type)
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{
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struct ia64_sal_retval isrv;
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if (sal_cache_flush_drops_interrupts) {
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unsigned long flags;
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u64 progress;
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s64 rc;
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progress = 0;
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local_irq_save(flags);
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rc = ia64_pal_cache_flush(cache_type,
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PAL_CACHE_FLUSH_INVALIDATE, &progress, NULL);
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local_irq_restore(flags);
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return rc;
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}
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SAL_CALL(isrv, SAL_CACHE_FLUSH, cache_type, 0, 0, 0, 0, 0, 0);
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return isrv.status;
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}
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void __init
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ia64_sal_init (struct ia64_sal_systab *systab)
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{
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char *p;
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int i;
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if (!systab) {
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printk(KERN_WARNING "Hmm, no SAL System Table.\n");
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return;
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}
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if (strncmp(systab->signature, "SST_", 4) != 0)
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printk(KERN_ERR "bad signature in system table!");
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check_versions(systab);
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#ifdef CONFIG_SMP
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chk_nointroute_opt();
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#endif
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/* revisions are coded in BCD, so %x does the job for us */
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printk(KERN_INFO "SAL %x.%x: %.32s %.32s%sversion %x.%x\n",
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SAL_MAJOR(sal_revision), SAL_MINOR(sal_revision),
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systab->oem_id, systab->product_id,
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systab->product_id[0] ? " " : "",
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SAL_MAJOR(sal_version), SAL_MINOR(sal_version));
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p = (char *) (systab + 1);
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for (i = 0; i < systab->entry_count; i++) {
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/*
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* The first byte of each entry type contains the type
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* descriptor.
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*/
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switch (*p) {
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case SAL_DESC_ENTRY_POINT:
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sal_desc_entry_point(p);
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break;
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case SAL_DESC_PLATFORM_FEATURE:
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sal_desc_platform_feature(p);
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break;
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case SAL_DESC_PTC:
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ia64_ptc_domain_info = (ia64_sal_desc_ptc_t *)p;
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break;
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case SAL_DESC_AP_WAKEUP:
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sal_desc_ap_wakeup(p);
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break;
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}
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p += SAL_DESC_SIZE(*p);
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}
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check_sal_cache_flush();
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}
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int
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ia64_sal_oemcall(struct ia64_sal_retval *isrvp, u64 oemfunc, u64 arg1,
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u64 arg2, u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7)
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{
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if (oemfunc < IA64_SAL_OEMFUNC_MIN || oemfunc > IA64_SAL_OEMFUNC_MAX)
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return -1;
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SAL_CALL(*isrvp, oemfunc, arg1, arg2, arg3, arg4, arg5, arg6, arg7);
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return 0;
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}
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EXPORT_SYMBOL(ia64_sal_oemcall);
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int
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ia64_sal_oemcall_nolock(struct ia64_sal_retval *isrvp, u64 oemfunc, u64 arg1,
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u64 arg2, u64 arg3, u64 arg4, u64 arg5, u64 arg6,
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u64 arg7)
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{
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if (oemfunc < IA64_SAL_OEMFUNC_MIN || oemfunc > IA64_SAL_OEMFUNC_MAX)
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return -1;
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SAL_CALL_NOLOCK(*isrvp, oemfunc, arg1, arg2, arg3, arg4, arg5, arg6,
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arg7);
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return 0;
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}
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EXPORT_SYMBOL(ia64_sal_oemcall_nolock);
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int
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ia64_sal_oemcall_reentrant(struct ia64_sal_retval *isrvp, u64 oemfunc,
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u64 arg1, u64 arg2, u64 arg3, u64 arg4, u64 arg5,
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u64 arg6, u64 arg7)
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{
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if (oemfunc < IA64_SAL_OEMFUNC_MIN || oemfunc > IA64_SAL_OEMFUNC_MAX)
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return -1;
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SAL_CALL_REENTRANT(*isrvp, oemfunc, arg1, arg2, arg3, arg4, arg5, arg6,
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arg7);
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return 0;
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}
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EXPORT_SYMBOL(ia64_sal_oemcall_reentrant);
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