patch-2.3.43 linux/arch/sparc/mm/io-unit.c

• Lines: 35
• Date: Tue Feb 8 18:23:13 2000
• Orig file: v2.3.42/linux/arch/sparc/mm/io-unit.c
• Orig date: Fri Jan 21 18:19:16 2000

diff -u --recursive --new-file v2.3.42/linux/arch/sparc/mm/io-unit.c linux/arch/sparc/mm/io-unit.c
@@ -1,4 +1,4 @@
-/* $Id: io-unit.c,v 1.20 2000/01/15 00:51:27 anton Exp $
+/* $Id: io-unit.c,v 1.21 2000/02/06 22:55:45 zaitcev Exp $
  * io-unit.c:  IO-UNIT specific routines for memory management.
  *
  * Copyright (C) 1997,1998 Jakub Jelinek    (jj@sunsite.mff.cuni.cz)
@@ -210,6 +210,20 @@
 
 static void iounit_unmap_dma_area(unsigned long addr, int len)
 {
+	/* XXX Somebody please fill this in */
+}
+
+/* XXX We do not pass sbus device here, bad. */
+static unsigned long iounit_translate_dvma(unsigned long addr)
+{
+	struct sbus_bus *sbus = sbus_root;	/* They are all the same */
+	struct iounit_struct *iounit = (struct iounit_struct *)sbus->iommu;
+	int i;
+	iopte_t *iopte;
+
+	i = ((addr - IOUNIT_DMA_BASE) >> PAGE_SHIFT);
+	iopte = (iopte_t *)(iounit->page_table + i);
+	return (iopte_val(*iopte) & 0xFFFFFFF0) << 4; /* XXX sun4d guru, help */
 }
 #endif
 
@@ -237,6 +251,7 @@
 #ifdef CONFIG_SBUS
 	BTFIXUPSET_CALL(mmu_map_dma_area, iounit_map_dma_area, BTFIXUPCALL_NORM);
 	BTFIXUPSET_CALL(mmu_unmap_dma_area, iounit_unmap_dma_area, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(mmu_translate_dvma, iounit_translate_dvma, BTFIXUPCALL_NORM);
 #endif
 }