fedora core 6 1.2949 + vserver 2.2.0

[linux-2.6.git] / arch / ia64 / kernel / sal.c

diff --git a/arch/ia64/kernel/sal.c b/arch/ia64/kernel/sal.c
index dcbc07e..20bad78 100644 (file)
--- a/arch/ia64/kernel/sal.c
+++ b/arch/ia64/kernel/sal.c
@@ -6,18 +6,19 @@
  * 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/delay.h>
 #include <asm/page.h>
 #include <asm/sal.h>
 #include <asm/pal.h>
 
-spinlock_t sal_lock __cacheline_aligned = SPIN_LOCK_UNLOCKED;
+ __cacheline_aligned DEFINE_SPINLOCK(sal_lock);
 unsigned long sal_platform_features;
 
 unsigned short sal_revision;
@@ -213,6 +214,78 @@ chk_nointroute_opt(void)
 static void __init sal_desc_ap_wakeup(void *p) { }
 #endif
 
+/*
+ * HP rx5670 firmware polls for interrupts during SAL_CACHE_FLUSH by reading
+ * cr.ivr, but it never writes cr.eoi.  This leaves any interrupt marked as
+ * "in-service" and masks other interrupts of equal or lower priority.
+ *
+ * HP internal defect reports: F1859, F2775, F3031.
+ */
+static int sal_cache_flush_drops_interrupts;
+
+void __init
+check_sal_cache_flush (void)
+{
+       unsigned long flags;
+       int cpu;
+       u64 vector, cache_type = 3;
+       struct ia64_sal_retval isrv;
+
+       cpu = get_cpu();
+       local_irq_save(flags);
+
+       /*
+        * Schedule a timer interrupt, wait until it's reported, and see if
+        * SAL_CACHE_FLUSH drops it.
+        */
+       ia64_set_itv(IA64_TIMER_VECTOR);
+       ia64_set_itm(ia64_get_itc() + 1000);
+
+       while (!ia64_get_irr(IA64_TIMER_VECTOR))
+               cpu_relax();
+
+       SAL_CALL(isrv, SAL_CACHE_FLUSH, cache_type, 0, 0, 0, 0, 0, 0);
+
+       if (isrv.status)
+               printk(KERN_ERR "SAL_CAL_FLUSH failed with %ld\n", isrv.status);
+
+       if (ia64_get_irr(IA64_TIMER_VECTOR)) {
+               vector = ia64_get_ivr();
+               ia64_eoi();
+               WARN_ON(vector != IA64_TIMER_VECTOR);
+       } else {
+               sal_cache_flush_drops_interrupts = 1;
+               printk(KERN_ERR "SAL: SAL_CACHE_FLUSH drops interrupts; "
+                       "PAL_CACHE_FLUSH will be used instead\n");
+               ia64_eoi();
+       }
+
+       local_irq_restore(flags);
+       put_cpu();
+}
+
+s64
+ia64_sal_cache_flush (u64 cache_type)
+{
+       struct ia64_sal_retval isrv;
+
+       if (sal_cache_flush_drops_interrupts) {
+               unsigned long flags;
+               u64 progress;
+               s64 rc;
+
+               progress = 0;
+               local_irq_save(flags);
+               rc = ia64_pal_cache_flush(cache_type,
+                       PAL_CACHE_FLUSH_INVALIDATE, &progress, NULL);
+               local_irq_restore(flags);
+               return rc;
+       }
+
+       SAL_CALL(isrv, SAL_CACHE_FLUSH, cache_type, 0, 0, 0, 0, 0, 0);
+       return isrv.status;
+}
+
 void __init
 ia64_sal_init (struct ia64_sal_systab *systab)
 {
@@ -261,4 +334,42 @@ ia64_sal_init (struct ia64_sal_systab *systab)
                }
                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);