Merge commit 'v2.6.28-rc2' into x86/pci-ioapic-boot-irq-quirks

1 files changed, 141 insertions, 0 deletions

diff --git a/arch/x86/kernel/bios_uv.c b/arch/x86/kernel/bios_uv.c
new file mode 100644
index 000000000000..f0dfe6f17e7e
--- /dev/null
+++ b/arch/x86/kernel/bios_uv.c
@@ -0,0 +1,141 @@
+/*
+ * BIOS run time interface routines.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+ *
+ *  Copyright (c) 2008 Silicon Graphics, Inc.  All Rights Reserved.
+ *  Copyright (c) Russ Anderson
+ */
+
+#include <linux/efi.h>
+#include <asm/efi.h>
+#include <linux/io.h>
+#include <asm/uv/bios.h>
+#include <asm/uv/uv_hub.h>
+
+struct uv_systab uv_systab;
+
+s64 uv_bios_call(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3, u64 a4, u64 a5)
+{
+        struct uv_systab *tab = &uv_systab;
+
+        if (!tab->function)
+                /*
+                 * BIOS does not support UV systab
+                 */
+                return BIOS_STATUS_UNIMPLEMENTED;
+
+        return efi_call6((void *)__va(tab->function),
+                                        (u64)which, a1, a2, a3, a4, a5);
+}
+
+s64 uv_bios_call_irqsave(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3,
+                                        u64 a4, u64 a5)
+{
+        unsigned long bios_flags;
+        s64 ret;
+
+        local_irq_save(bios_flags);
+        ret = uv_bios_call(which, a1, a2, a3, a4, a5);
+        local_irq_restore(bios_flags);
+
+        return ret;
+}
+
+s64 uv_bios_call_reentrant(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3,
+                                        u64 a4, u64 a5)
+{
+        s64 ret;
+
+        preempt_disable();
+        ret = uv_bios_call(which, a1, a2, a3, a4, a5);
+        preempt_enable();
+
+        return ret;
+}
+
+
+long sn_partition_id;
+EXPORT_SYMBOL_GPL(sn_partition_id);
+long uv_coherency_id;
+EXPORT_SYMBOL_GPL(uv_coherency_id);
+long uv_region_size;
+EXPORT_SYMBOL_GPL(uv_region_size);
+int uv_type;
+
+
+s64 uv_bios_get_sn_info(int fc, int *uvtype, long *partid, long *coher,
+                long *region)
+{
+        s64 ret;
+        u64 v0, v1;
+        union partition_info_u part;
+
+        ret = uv_bios_call_irqsave(UV_BIOS_GET_SN_INFO, fc,
+                                (u64)(&v0), (u64)(&v1), 0, 0);
+        if (ret != BIOS_STATUS_SUCCESS)
+                return ret;
+
+        part.val = v0;
+        if (uvtype)
+                *uvtype = part.hub_version;
+        if (partid)
+                *partid = part.partition_id;
+        if (coher)
+                *coher = part.coherence_id;
+        if (region)
+                *region = part.region_size;
+        return ret;
+}
+
+
+s64 uv_bios_freq_base(u64 clock_type, u64 *ticks_per_second)
+{
+        return uv_bios_call(UV_BIOS_FREQ_BASE, clock_type,
+                           (u64)ticks_per_second, 0, 0, 0);
+}
+EXPORT_SYMBOL_GPL(uv_bios_freq_base);
+
+
+#ifdef CONFIG_EFI
+void uv_bios_init(void)
+{
+        struct uv_systab *tab;
+
+        if ((efi.uv_systab == EFI_INVALID_TABLE_ADDR) ||
+            (efi.uv_systab == (unsigned long)NULL)) {
+                printk(KERN_CRIT "No EFI UV System Table.\n");
+                uv_systab.function = (unsigned long)NULL;
+                return;
+        }
+
+        tab = (struct uv_systab *)ioremap(efi.uv_systab,
+                                        sizeof(struct uv_systab));
+        if (strncmp(tab->signature, "UVST", 4) != 0)
+                printk(KERN_ERR "bad signature in UV system table!");
+
+        /*
+         * Copy table to permanent spot for later use.
+         */
+        memcpy(&uv_systab, tab, sizeof(struct uv_systab));
+        iounmap(tab);
+
+        printk(KERN_INFO "EFI UV System Table Revision %d\n", tab->revision);
+}
+#else   /* !CONFIG_EFI */
+
+void uv_bios_init(void) { }
+#endif
+