x86: Add UV bios call infrastructure

Index: linux/arch/x86/kernel/bios_uv.c
===================================================================
@@ -1,8 +1,6 @@
 /*
  * BIOS run time interface routines.
  *
- *  Copyright (c) 2008 Silicon Graphics, Inc.  All Rights Reserved.
- *
  *  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

@@ -16,33 +14,99 @@
  *  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 <linux/io.h>
 #include <asm/uv/bios.h>
 
-const char *
-x86_bios_strerror(long status)
+struct sal_systab sal_systab;
+
+s64 uv_bios_call(int which, u64 a1, u64 a2, u64 a3, u64 a4, u64 a5)
 {
-	const char *str;
-	switch (status) {
-	case  0: str = "Call completed without error"; break;
-	case -1: str = "Not implemented"; break;
-	case -2: str = "Invalid argument"; break;
-	case -3: str = "Call completed with error"; break;
-	default: str = "Unknown BIOS status code"; break;
-	}
-	return str;
+	struct sal_systab *tab = &sal_systab;
+
+	if (tab->function == (unsigned long)NULL)
+		/*
+		 * BIOS does not support SAL systab
+		 */
+		return BIOS_STATUS_UNIMPLEMENTED;
+
+	return efi_call6((void *)__va(tab->function),
+					which, a1, a2, a3, a4, a5);
 }
 
-long
-x86_bios_freq_base(unsigned long which, unsigned long *ticks_per_second,
-		   unsigned long *drift_info)
+s64 uv_bios_call_irqsave(int which, u64 a1, u64 a2, u64 a3, u64 a4, u64 a5)
 {
-	struct uv_bios_retval isrv;
+	unsigned long bios_flags;
+	s64 ret;
 
-	BIOS_CALL(isrv, BIOS_FREQ_BASE, which, 0, 0, 0, 0, 0, 0);
-	*ticks_per_second = isrv.v0;
-	*drift_info = isrv.v1;
-	return isrv.status;
+	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(int 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
+x86_bios_freq_base(unsigned long clock_type, unsigned long *ticks_per_second,
+					unsigned long *drift_info)
+{
+	return uv_bios_call(BIOS_FREQ_BASE, clock_type,
+				(u64)ticks_per_second, 0, 0, 0);
 }
 EXPORT_SYMBOL_GPL(x86_bios_freq_base);
+
+
+#ifdef CONFIG_EFI
+void uv_bios_init(void)
+{
+	struct sal_systab *tab;
+
+	if ((efi.sal_systab == EFI_INVALID_TABLE_ADDR) ||
+	    (efi.sal_systab == (unsigned long)NULL)) {
+		printk(KERN_CRIT "No EFI SAL System Table.\n");
+		sal_systab.function = (unsigned long)NULL;
+		return;
+	}
+
+	tab = (struct sal_systab *)ioremap(efi.sal_systab,
+					sizeof(struct sal_systab));
+	if (strncmp(tab->signature, "SST_", 4) != 0)
+		printk(KERN_ERR "bad signature in SAL system table!");
+
+	/*
+	 * Copy table to permanent spot for later use.
+	 */
+	memcpy(&sal_systab, tab, sizeof(struct sal_systab));
+	iounmap(tab);
+
+	printk(KERN_INFO "EFI SAL System Table Revision %d\n", tab->revision);
+}
+#else	/* !CONFIG_EFI */
+/*
+ * IF EFI is not configured, have the EFI calls return unimplemented.
+ */
+u64 efi_call6(void *fp, u64 arg1, u64 arg2, u64 arg3,
+			u64 arg4, u64 arg5, u64 arg6)
+{
+	return  BIOS_STATUS_UNIMPLEMENTED;
+}
+
+void uv_bios_init(void) { }
+#endif
+

Index: linux/arch/x86/kernel/genx2apic_uv_x.c
===================================================================
@@ -411,6 +411,7 @@ static __init void uv_system_init(void)
 	gnode_upper = (((unsigned long)node_id.s.node_id) &
 		       ~((1 << n_val) - 1)) << m_val;
 
+	uv_bios_init();
 	uv_rtc_init();
 
 	for_each_present_cpu(cpu) {

84 lines not on this page · raw message