patch-2.1.16 linux/include/asm-sparc/viking.h

• Lines: 60
• Date: Fri Dec 13 11:37:40 1996
• Orig file: v2.1.15/linux/include/asm-sparc/viking.h
• Orig date: Tue Nov 12 15:56:13 1996

diff -u --recursive --new-file v2.1.15/linux/include/asm-sparc/viking.h linux/include/asm-sparc/viking.h
@@ -1,4 +1,4 @@
-/* $Id: viking.h,v 1.16 1996/08/29 09:49:10 davem Exp $
+/* $Id: viking.h,v 1.17 1996/11/24 17:11:51 ecd Exp $
  * viking.h:  Defines specific to the GNU/Viking MBUS module.
  *            This is SRMMU stuff.
  *
@@ -9,6 +9,7 @@
 
 #include <asm/asi.h>
 #include <asm/mxcc.h>
+#include <asm/pgtsrmmu.h>
 
 /* Bits in the SRMMU control register for GNU/Viking modules.
  *
@@ -193,6 +194,45 @@
 			      "i" (ASI_M_MXCC) : "g2");
 	*mregp = mreg;
 	*mxcc_cregp = mxcc_creg;
+}
+
+extern __inline__ unsigned long viking_hwprobe(unsigned long vaddr)
+{
+	unsigned long val;
+
+	vaddr &= PAGE_MASK;
+	/* Probe all MMU entries. */
+	__asm__ __volatile__("lda [%1] %2, %0\n\t" :
+			     "=r" (val) :
+			     "r" (vaddr | 0x400), "i" (ASI_M_FLUSH_PROBE));
+	if (!val)
+		return 0;
+
+	/* Probe region. */
+	__asm__ __volatile__("lda [%1] %2, %0\n\t" :
+			     "=r" (val) :
+			     "r" (vaddr | 0x200), "i" (ASI_M_FLUSH_PROBE));
+	if ((val & SRMMU_ET_MASK) == SRMMU_ET_PTE) {
+		vaddr &= ~SRMMU_PGDIR_MASK;
+		vaddr >>= PAGE_SHIFT;
+		return val | (vaddr << 8);
+	}
+
+	/* Probe segment. */
+	__asm__ __volatile__("lda [%1] %2, %0\n\t" :
+			     "=r" (val) :
+			     "r" (vaddr | 0x100), "i" (ASI_M_FLUSH_PROBE));
+	if ((val & SRMMU_ET_MASK) == SRMMU_ET_PTE) {
+		vaddr &= ~SRMMU_PMD_MASK;
+		vaddr >>= PAGE_SHIFT;
+		return val | (vaddr << 8);
+	}
+
+	/* Probe page. */
+	__asm__ __volatile__("lda [%1] %2, %0\n\t" :
+			     "=r" (val) :
+			     "r" (vaddr), "i" (ASI_M_FLUSH_PROBE));
+	return val;
 }
 
 #endif /* !(_SPARC_VIKING_H) */