patch-2.4.19 linux-2.4.19/arch/ppc64/kernel/HvCall.c

• Lines: 116
• Date: Fri Aug 2 17:39:43 2002
• Orig file: linux-2.4.18/arch/ppc64/kernel/HvCall.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -urN linux-2.4.18/arch/ppc64/kernel/HvCall.c linux-2.4.19/arch/ppc64/kernel/HvCall.c
@@ -0,0 +1,115 @@
+/*
+ * HvCall.c
+ * Copyright (C) 2001  Mike Corrigan IBM Corporation
+ * 
+ * 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.
+ */
+
+#include <linux/stddef.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/slab.h>
+#include <asm/system.h>
+#include <asm/page.h>
+#include <asm/iSeries/HvCall.h>
+#ifndef  _HVCALLSC_H
+#include <asm/iSeries/HvCallSc.h>
+#endif
+#include <asm/iSeries/LparData.h>
+
+#ifndef  _HVTYPES_H
+#include <asm/iSeries/HvTypes.h>
+#endif
+
+
+/*=====================================================================
+ * Note that this call takes at MOST one page worth of data
+ */
+int HvCall_readLogBuffer(HvLpIndex lpIndex, void *buffer, u64 bufLen)
+{
+	struct HvLpBufferList *bufList;
+	u64 bytesLeft = bufLen;
+	u64 leftThisPage;
+	u64 curPtr = virt_to_absolute( (unsigned long) buffer );
+	u64 retVal;
+	int npages;
+	int i;
+
+	npages = 0;
+	while (bytesLeft) {
+		npages++;
+		leftThisPage = ((curPtr & PAGE_MASK) + PAGE_SIZE) - curPtr;
+
+		if (leftThisPage > bytesLeft)
+			bytesLeft = 0;
+		else
+			bytesLeft -= leftThisPage;
+
+		curPtr = (curPtr & PAGE_MASK) + PAGE_SIZE;
+	}
+
+	if (npages == 0)
+		return 0;
+
+	bufList = (struct HvLpBufferList *)
+		kmalloc(npages * sizeof(struct HvLpBufferList), GFP_ATOMIC);
+	bytesLeft = bufLen;
+	curPtr = virt_to_absolute( (unsigned long) buffer );
+	for(i=0; i<npages; i++) {
+		bufList[i].addr = curPtr;
+      
+		leftThisPage = ((curPtr & PAGE_MASK) + PAGE_SIZE) - curPtr;
+
+		if (leftThisPage > bytesLeft) {
+			bufList[i].len = bytesLeft;
+			bytesLeft = 0;
+		} else {
+			bufList[i].len = leftThisPage;
+			bytesLeft -= leftThisPage;
+		}
+
+		curPtr = (curPtr & PAGE_MASK) + PAGE_SIZE;
+	}
+
+
+	retVal = HvCall3(HvCallBaseReadLogBuffer, lpIndex,
+			 virt_to_absolute((unsigned long)bufList), bufLen);
+
+	kfree(bufList);
+
+	return (int)retVal;
+}
+
+/*=====================================================================
+ */
+void HvCall_writeLogBuffer(const void *buffer, u64 bufLen)
+{
+	struct HvLpBufferList bufList;
+	u64 bytesLeft = bufLen;
+	u64 leftThisPage;
+	u64 curPtr = virt_to_absolute( (unsigned long) buffer );
+
+	while (bytesLeft) {
+		bufList.addr = curPtr;
+      
+		leftThisPage = ((curPtr & PAGE_MASK) + PAGE_SIZE) - curPtr;
+
+		if (leftThisPage > bytesLeft) {
+			bufList.len = bytesLeft;
+			bytesLeft = 0;
+		} else {
+			bufList.len = leftThisPage;
+			bytesLeft -= leftThisPage;
+		}
+
+		curPtr = (curPtr & PAGE_MASK) + PAGE_SIZE;
+	}
+
+
+	HvCall2(HvCallBaseWriteLogBuffer,
+		virt_to_absolute((unsigned long)&bufList), bufLen);
+
+}