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-rw-r--r--arch/ia64/kernel/sal.c302
1 files changed, 302 insertions, 0 deletions
diff --git a/arch/ia64/kernel/sal.c b/arch/ia64/kernel/sal.c
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+++ b/arch/ia64/kernel/sal.c
@@ -0,0 +1,302 @@
+/*
+ * System Abstraction Layer (SAL) interface routines.
+ *
+ * Copyright (C) 1998, 1999, 2001, 2003 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/module.h>
+#include <linux/spinlock.h>
+#include <linux/string.h>
+
+#include <asm/page.h>
+#include <asm/sal.h>
+#include <asm/pal.h>
+
+ __cacheline_aligned DEFINE_SPINLOCK(sal_lock);
+unsigned long sal_platform_features;
+
+unsigned short sal_revision;
+unsigned short sal_version;
+
+#define SAL_MAJOR(x) ((x) >> 8)
+#define SAL_MINOR(x) ((x) & 0xff)
+
+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;
+}
+
+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;
+}
+
+static void __init
+check_versions (struct ia64_sal_systab *systab)
+{
+ sal_revision = (systab->sal_rev_major << 8) | systab->sal_rev_minor;
+ sal_version = (systab->sal_b_rev_major << 8) | systab->sal_b_rev_minor;
+
+ /* Check for broken firmware */
+ if ((sal_revision == SAL_VERSION_CODE(49, 29))
+ && (sal_version == SAL_VERSION_CODE(49, 29)))
+ {
+ /*
+ * Old firmware for zx2000 prototypes have this weird version number,
+ * reset it to something sane.
+ */
+ sal_revision = SAL_VERSION_CODE(2, 8);
+ sal_version = SAL_VERSION_CODE(0, 0);
+ }
+}
+
+static void __init
+sal_desc_entry_point (void *p)
+{
+ struct ia64_sal_desc_entry_point *ep = p;
+ ia64_pal_handler_init(__va(ep->pal_proc));
+ ia64_sal_handler_init(__va(ep->sal_proc), __va(ep->gp));
+}
+
+#ifdef CONFIG_SMP
+static void __init
+set_smp_redirect (int flag)
+{
+#ifndef CONFIG_HOTPLUG_CPU
+ if (no_int_routing)
+ smp_int_redirect &= ~flag;
+ else
+ smp_int_redirect |= flag;
+#else
+ /*
+ * For CPU Hotplug we dont want to do any chipset supported
+ * interrupt redirection. The reason is this would require that
+ * All interrupts be stopped and hard bind the irq to a cpu.
+ * Later when the interrupt is fired we need to set the redir hint
+ * on again in the vector. This is combersome for something that the
+ * user mode irq balancer will solve anyways.
+ */
+ no_int_routing=1;
+ smp_int_redirect &= ~flag;
+#endif
+}
+#else
+#define set_smp_redirect(flag) do { } while (0)
+#endif
+
+static void __init
+sal_desc_platform_feature (void *p)
+{
+ struct ia64_sal_desc_platform_feature *pf = p;
+ sal_platform_features = pf->feature_mask;
+
+ printk(KERN_INFO "SAL Platform features:");
+ if (!sal_platform_features) {
+ printk(" None\n");
+ return;
+ }
+
+ if (sal_platform_features & IA64_SAL_PLATFORM_FEATURE_BUS_LOCK)
+ printk(" BusLock");
+ if (sal_platform_features & IA64_SAL_PLATFORM_FEATURE_IRQ_REDIR_HINT) {
+ printk(" IRQ_Redirection");
+ set_smp_redirect(SMP_IRQ_REDIRECTION);
+ }
+ if (sal_platform_features & IA64_SAL_PLATFORM_FEATURE_IPI_REDIR_HINT) {
+ printk(" IPI_Redirection");
+ set_smp_redirect(SMP_IPI_REDIRECTION);
+ }
+ if (sal_platform_features & IA64_SAL_PLATFORM_FEATURE_ITC_DRIFT)
+ printk(" ITC_Drift");
+ printk("\n");
+}
+
+#ifdef CONFIG_SMP
+static void __init
+sal_desc_ap_wakeup (void *p)
+{
+ struct ia64_sal_desc_ap_wakeup *ap = p;
+
+ switch (ap->mechanism) {
+ case IA64_SAL_AP_EXTERNAL_INT:
+ ap_wakeup_vector = ap->vector;
+ printk(KERN_INFO "SAL: AP wakeup using external interrupt "
+ "vector 0x%lx\n", ap_wakeup_vector);
+ break;
+ default:
+ printk(KERN_ERR "SAL: AP wakeup mechanism unsupported!\n");
+ break;
+ }
+}
+
+static void __init
+chk_nointroute_opt(void)
+{
+ char *cp;
+ extern char saved_command_line[];
+
+ for (cp = saved_command_line; *cp; ) {
+ if (memcmp(cp, "nointroute", 10) == 0) {
+ no_int_routing = 1;
+ printk ("no_int_routing on\n");
+ break;
+ } else {
+ while (*cp != ' ' && *cp)
+ ++cp;
+ while (*cp == ' ')
+ ++cp;
+ }
+ }
+}
+
+#else
+static void __init sal_desc_ap_wakeup(void *p) { }
+#endif
+
+void __init
+ia64_sal_init (struct ia64_sal_systab *systab)
+{
+ char *p;
+ int i;
+
+ if (!systab) {
+ printk(KERN_WARNING "Hmm, no SAL System Table.\n");
+ return;
+ }
+
+ if (strncmp(systab->signature, "SST_", 4) != 0)
+ printk(KERN_ERR "bad signature in system table!");
+
+ check_versions(systab);
+#ifdef CONFIG_SMP
+ chk_nointroute_opt();
+#endif
+
+ /* revisions are coded in BCD, so %x does the job for us */
+ printk(KERN_INFO "SAL %x.%x: %.32s %.32s%sversion %x.%x\n",
+ SAL_MAJOR(sal_revision), SAL_MINOR(sal_revision),
+ systab->oem_id, systab->product_id,
+ systab->product_id[0] ? " " : "",
+ SAL_MAJOR(sal_version), SAL_MINOR(sal_version));
+
+ p = (char *) (systab + 1);
+ for (i = 0; i < systab->entry_count; i++) {
+ /*
+ * The first byte of each entry type contains the type
+ * descriptor.
+ */
+ switch (*p) {
+ case SAL_DESC_ENTRY_POINT:
+ sal_desc_entry_point(p);
+ break;
+ case SAL_DESC_PLATFORM_FEATURE:
+ sal_desc_platform_feature(p);
+ break;
+ case SAL_DESC_PTC:
+ ia64_ptc_domain_info = (ia64_sal_desc_ptc_t *)p;
+ break;
+ case SAL_DESC_AP_WAKEUP:
+ sal_desc_ap_wakeup(p);
+ break;
+ }
+ p += SAL_DESC_SIZE(*p);
+ }
+}
+
+int
+ia64_sal_oemcall(struct ia64_sal_retval *isrvp, u64 oemfunc, u64 arg1,
+ u64 arg2, u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7)
+{
+ if (oemfunc < IA64_SAL_OEMFUNC_MIN || oemfunc > IA64_SAL_OEMFUNC_MAX)
+ return -1;
+ SAL_CALL(*isrvp, oemfunc, arg1, arg2, arg3, arg4, arg5, arg6, arg7);
+ return 0;
+}
+EXPORT_SYMBOL(ia64_sal_oemcall);
+
+int
+ia64_sal_oemcall_nolock(struct ia64_sal_retval *isrvp, u64 oemfunc, u64 arg1,
+ u64 arg2, u64 arg3, u64 arg4, u64 arg5, u64 arg6,
+ u64 arg7)
+{
+ if (oemfunc < IA64_SAL_OEMFUNC_MIN || oemfunc > IA64_SAL_OEMFUNC_MAX)
+ return -1;
+ SAL_CALL_NOLOCK(*isrvp, oemfunc, arg1, arg2, arg3, arg4, arg5, arg6,
+ arg7);
+ return 0;
+}
+EXPORT_SYMBOL(ia64_sal_oemcall_nolock);
+
+int
+ia64_sal_oemcall_reentrant(struct ia64_sal_retval *isrvp, u64 oemfunc,
+ u64 arg1, u64 arg2, u64 arg3, u64 arg4, u64 arg5,
+ u64 arg6, u64 arg7)
+{
+ if (oemfunc < IA64_SAL_OEMFUNC_MIN || oemfunc > IA64_SAL_OEMFUNC_MAX)
+ return -1;
+ SAL_CALL_REENTRANT(*isrvp, oemfunc, arg1, arg2, arg3, arg4, arg5, arg6,
+ arg7);
+ return 0;
+}
+EXPORT_SYMBOL(ia64_sal_oemcall_reentrant);