DRVMGR: reworked the address translation functions

Cleaned up the address translation implementation and updated
all users to the new interface. The old implementation had a bug
and the users used it incorrect. This patch aims to fix both
problems.

One can not translate a address upstreams and then take that
address and expect it to be translateable downstreams..

18 files changed, 726 insertions, 431 deletions

diff --git a/c/src/lib/libbsp/sparc/shared/1553/b1553brm.c b/c/src/lib/libbsp/sparc/shared/1553/b1553brm.c
index ca81a929a6..65af6bfd49 100644
--- a/c/src/lib/libbsp/sparc/shared/1553/b1553brm.c
+++ b/c/src/lib/libbsp/sparc/shared/1553/b1553brm.c
@@ -424,7 +424,8 @@ int b1553brm_device_init(brm_priv *pDev)
 	struct amba_dev_info *ambadev;
 	struct ambapp_core *pnpinfo;
 	union drvmgr_key_value *value;
-	char *mem;
+	unsigned int mem;
+	int size;
 
 	/* Get device information from AMBA PnP information */
 	ambadev = (struct amba_dev_info *)pDev->dev->businfo;
@@ -449,44 +450,57 @@ int b1553brm_device_init(brm_priv *pDev)
 	memset(pDev->log,0,sizeof(pDev->log));
 #endif
 
+#ifdef DMA_MEM_128K
+	size = 128 * 1024;
+#else
+	size = 16 * 1024;
+#endif
+
 	/* Get memory configuration from bus resources */
 	value = drvmgr_dev_key_get(pDev->dev, "dmaBaseAdr", KEY_TYPE_POINTER);
-	if ( value ) {
-		mem = value->ptr;
-		if ( (unsigned int)mem & 1 ) {
-			/* Remote address, address as BRM looks at it. */
-
-			/* Translate the base address into an address that the the CPU can understand */
-			mem = (char *)((unsigned int)mem & ~1);
-			drvmgr_translate(pDev->dev, 1, 1, (void *)mem, (void **)&mem);
-		}
+	if (value)
+		mem = (unsigned int)value->ptr;
+
+	if (value && (mem & 1)) {
+		/* Remote address, address as BRM looks at it. */
+
+		/* Translate the base address into an address that the the CPU can understand */
+		pDev->memarea_base_remote = mem & ~1;
+		drvmgr_translate_check(pDev->dev, DMAMEM_TO_CPU,
+					(void *)pDev->memarea_base_remote,
+					(void **)&pDev->memarea_base,
+					size);
 	} else {
-		/* Use dynamically allocated memory */
-		mem = (char *)malloc(128 * 1024 * 2); /* 128k DMA memory + 128k for alignment */
-		if ( !mem ){
-			printk("BRM: Failed to allocate HW memory\n\r");
-			return -1;
+		if (!value) {
+			/* Use dynamically allocated memory + 128k for
+			 * alignment
+			 */
+			mem = (unsigned int)malloc(size + 128 * 1024);
+			if (!mem){
+				printk("BRM: Failed to allocate HW memory\n\r");
+				return -1;
+			}
+			/* align memory to 128k boundary */
+			pDev->memarea_base = (mem + 0x1ffff) & ~0x1ffff;
+		} else {
+			pDev->memarea_base = mem;
 		}
+
+		/* Translate the base address into an address that the BRM core can understand */
+		drvmgr_translate_check(pDev->dev, CPUMEM_TO_DMA,
+					(void *)pDev->memarea_base,
+					(void **)&pDev->memarea_base_remote,
+					size);
 	}
-	/* align memory to 128k boundary */
-	mem = (char *)(((unsigned int)mem+0x1ffff) & ~0x1ffff);
 
 	/* clear the used memory */
-#ifdef DMA_MEM_128K
-	memset(mem, 0, (128 * 1024));
-#else
-	memset(mem, 0, (16 * 1024));
-#endif
+	memset((char *)pDev->memarea_base, 0, size);
 
 	/* Set base address of all descriptors */
-	pDev->memarea_base = (unsigned int)mem;
 	pDev->desc = (struct desc_table *) pDev->memarea_base;
 	pDev->mem = (volatile unsigned short *) pDev->memarea_base;
 	pDev->irq_log	= (struct irq_log_list *)(pDev->memarea_base + (0xFFE0<<1)); /* last 64byte */
 
-	/* Translate the base address into an address that the BRM core can understand */
-	drvmgr_translate(pDev->dev, 0, 0, (void *)mem, (void **)&pDev->memarea_base_remote);
-
 	pDev->bm_event = NULL;
 	pDev->rt_event = NULL;
 
diff --git a/c/src/lib/libbsp/sparc/shared/1553/b1553rt.c b/c/src/lib/libbsp/sparc/shared/1553/b1553rt.c
index acb9379650..f663a2dc95 100644
--- a/c/src/lib/libbsp/sparc/shared/1553/b1553rt.c
+++ b/c/src/lib/libbsp/sparc/shared/1553/b1553rt.c
@@ -282,7 +282,7 @@ int b1553rt_device_init(rt_priv *pDev)
     struct amba_dev_info *ambadev;
     struct ambapp_core *pnpinfo;
     union drvmgr_key_value *value;
-    char *mem;
+    unsigned int mem;
     unsigned int sys_freq_hz;
 
     /* Get device information from AMBA PnP information */
@@ -304,36 +304,47 @@ int b1553rt_device_init(rt_priv *pDev)
 
     /* Get memory configuration from bus resources */
     value = drvmgr_dev_key_get(pDev->dev, "dmaBaseAdr", KEY_TYPE_POINTER);
-    if ( value ) {
-        mem = value->ptr;
-        if ( (unsigned int)mem & 1 ) {
-            /* Remote address, address as RT looks at it. */
-
-            /* Translate the base address into an address that the the CPU can understand */
-            mem = (char *)((unsigned int)mem & ~1);
-	    drvmgr_translate(pDev->dev, 1, 1, (void *)mem, (void **)&mem);
-        }
+    if (value)
+        mem = (unsigned int)value->ptr;
+
+    if (value && (mem & 1)) {
+        /* Remote address, address as RT looks at it. */
+
+        /* Translate the base address into an address that the the CPU can understand */
+        pDev->memarea_base = mem & ~1;
+        drvmgr_translate_check(pDev->dev, DMAMEM_TO_CPU,
+                                (void *)pDev->memarea_base_remote,
+                                (void **)&pDev->memarea_base,
+                                4 * 1024);
     } else {
-        /* Use dynamically allocated memory */
-        mem = (char *)malloc(4 * 1024 * 2); /* 4k DMA memory + 4k for alignment */
-        if ( !mem ){
-            printk("RT: Failed to allocate HW memory\n\r");
-            return -1;
+        if (!value) {
+            /* Use dynamically allocated memory,
+             * 4k DMA memory + 4k for alignment 
+             */
+            mem = (char *)malloc(4 * 1024 * 2);
+            if ( !mem ){
+                printk("RT: Failed to allocate HW memory\n\r");
+                return -1;
+            }
+            /* align memory to 4k boundary */
+            pDev->memarea_base = (mem + 0xfff) & ~0xfff;
+        } else {
+            pDev->memarea_base = mem;
         }
-    }
 
-    /* align memory to 4k boundary */
-    mem = (char *)(((unsigned int)mem+0xfff) & ~0xfff);
+        /* Translate the base address into an address that the RT core can understand */
+        drvmgr_translate_check(pDev->dev, CPUMEM_TO_DMA,
+                               (void *)pDev->memarea_base,
+                               (void **)&pDev->memarea_base_remote,
+                               4 * 1024);
+    }
 
     /* clear the used memory */
-    memset(mem, 0, (4 * 1024));
+    memset((char *)pDev->memarea_base, 0, 4 * 1024);
 
     /* Set base address of all descriptors */
     pDev->memarea_base = (unsigned int)mem;
-    pDev->mem = (volatile unsigned short *) pDev->memarea_base;
-
-    /* Translate the base address into an address that the RT core can understand */
-    drvmgr_translate(pDev->dev, 0, 0, (void *)mem, (void **)&pDev->memarea_base_remote);
+    pDev->mem = (volatile unsigned short *)pDev->memarea_base;
 
     pDev->rt_event = NULL;
 
diff --git a/c/src/lib/libbsp/sparc/shared/1553/gr1553bc.c b/c/src/lib/libbsp/sparc/shared/1553/gr1553bc.c
index d409761994..e224f25174 100644
--- a/c/src/lib/libbsp/sparc/shared/1553/gr1553bc.c
+++ b/c/src/lib/libbsp/sparc/shared/1553/gr1553bc.c
@@ -309,47 +309,51 @@ int gr1553bc_list_table_alloc
 	/* Remember user's settings for uninitialization */
 	list->_table_custom = bdtab_custom;
 
-	if ( bdtab_custom == NULL ) {
-		/* Get Size required for descriptors */
-		size = gr1553bc_list_table_size(list);
+	/* Get Size required for descriptors */
+	size = gr1553bc_list_table_size(list);
 
-		/* Allocate descriptors */
-		list->_table = malloc(size + (GR1553BC_BD_ALIGN-1));
-		if ( list->_table == NULL )
-			return -1;
-	} else if ( (unsigned int)bdtab_custom & 0x1 ) {
+	if ((unsigned int)bdtab_custom & 0x1) {
 		/* Address given in Hardware accessible address, we
 		 * convert it into CPU-accessible address.
 		 */
-		drvmgr_translate(
-			*bcpriv->pdev,
-			1,
-			1,
-			(void *)((unsigned int)bdtab_custom & ~0x1),
-			(void **)&list->_table
-			);
-	} else {
-		/* Custom address, given in CPU-accessible address */
+		list->table_hw = (unsigned int)bdtab_custom & ~0x1;
 		list->_table = bdtab_custom;
-	}
-
-	/* 128-bit Alignment required by HW */
-	table = (unsigned int)list->_table;
-	table = (table + (GR1553BC_BD_ALIGN-1)) & ~(GR1553BC_BD_ALIGN-1);
-	list->table_cpu = table;
-	list->table_hw = table;
-
-	/* We got CPU accessible descriptor table address, now we translate
-	 * that into an address which the Hardware can understand
-	 */
-	if ( bcpriv ) {
-		drvmgr_translate(
+		drvmgr_translate_check(
 			*bcpriv->pdev,
-			0,
-			0,
-			(void *)list->table_cpu,
-			(void **)&list->table_hw
-			);
+			DMAMEM_TO_CPU,
+			(void *)list->table_hw,
+			(void **)&list->table_cpu,
+			size);
+	} else {
+		if (bdtab_custom == NULL) {
+			/* Allocate descriptors */
+			list->_table = malloc(size + (GR1553BC_BD_ALIGN-1));
+			if ( list->_table == NULL )
+				return -1;
+		} else {
+			/* Custom address, given in CPU-accessible address */
+			list->_table = bdtab_custom;
+		}
+		/* 128-bit Alignment required by HW */
+		list->table_cpu =
+			(((unsigned int)list->_table + (GR1553BC_BD_ALIGN-1)) &
+			~(GR1553BC_BD_ALIGN-1));
+
+		/* We got CPU accessible descriptor table address, now we
+		 * translate that into an address that the Hardware can
+		 * understand
+		 */
+		if (bcpriv) {
+			drvmgr_translate_check(
+				*bcpriv->pdev,
+				CPUMEM_TO_DMA,
+				(void *)list->table_cpu,
+				(void **)&list->table_hw,
+				size
+				);
+		} else {
+			list->table_hw = list->table_cpu;
+		}
 	}
 
 	/* Write End-Of-List all over the descriptor table here,
@@ -359,6 +363,7 @@ int gr1553bc_list_table_alloc
 	/* Assign descriptors to all minor frames. The addresses is
 	 * CPU-accessible addresses.
 	 */
+	table = list->table_cpu;
 	for (i=0; i<list->major_cnt; i++) {
 		major = list->majors[i];
 		minor_cnt = major->cfg->minor_cnt;
@@ -1039,11 +1044,9 @@ int gr1553bc_slot_transfer(
 
 		drvmgr_translate(
 			*bcpriv->pdev,
-			0,
-			0,
+			CPUMEM_TO_DMA,
 			(void *)((unsigned int)dptr & ~0x1),
-			(void **)&dptr
-			);
+			(void **)&dptr);
 	}
 
 	/* It is assumed that the descriptor has already been initialized
@@ -1113,8 +1116,7 @@ int gr1553bc_slot_update
 		if ( dataptr & 0x1 ) {
 			drvmgr_translate(
 				*bcpriv->pdev,
-				0,
-				0,
+				CPUMEM_TO_DMA,
 				(void *)(dataptr & ~0x1),
 				(void **)&dptr
 				);
@@ -1478,13 +1480,12 @@ void gr1553bc_device_init(struct gr1553bc_priv *priv)
 		(((uint32_t)priv->irq_log_p + (GR1553BC_IRQLOG_SIZE-1)) & 
 		~(GR1553BC_IRQLOG_SIZE-1));
 	/* Translate into a hardware accessible address */
-	drvmgr_translate(
+	drvmgr_translate_check(
 		*priv->pdev,
-		0,
-		0,
+		CPUMEM_TO_DMA,
 		(void *)priv->irq_log_base,
-		(void **)&priv->irq_log_base_hw
-		);
+		(void **)&priv->irq_log_base_hw,
+		GR1553BC_IRQLOG_SIZE);
 	priv->irq_log_curr = priv->irq_log_base;
 	priv->irq_log_end = &priv->irq_log_base[GR1553BC_IRQLOG_CNT-1];
 	priv->irq_func = gr1553bc_isr_std;
diff --git a/c/src/lib/libbsp/sparc/shared/1553/gr1553bm.c b/c/src/lib/libbsp/sparc/shared/1553/gr1553bm.c
index 2ceb2a9046..d2fc979b0c 100644
--- a/c/src/lib/libbsp/sparc/shared/1553/gr1553bm.c
+++ b/c/src/lib/libbsp/sparc/shared/1553/gr1553bm.c
@@ -209,46 +209,46 @@ int gr1553bm_config(void *bm, struct gr1553bm_config *cfg)
 		priv->buffer = NULL;
 	}
 	priv->buffer_size = cfg->buffer_size & ~0x7; /* on 8 byte bounadry */
-	if ( cfg->buffer_custom == NULL ) {
-		/* Allocate new buffer dynamically */
-		priv->buffer = malloc(priv->buffer_size + 8);
-		if ( priv->buffer == NULL )
-			return -1;
+	if ((unsigned int)cfg->buffer_custom & 1) {
+		/* Custom Address Given in Remote address. We need
+		 * to convert it intoTranslate into Hardware a
+		 * hardware accessible address
+		 */
+		priv->buffer_base_hw = (unsigned int)cfg->buffer_custom & ~1;
+		priv->buffer = cfg->buffer_custom;
+		drvmgr_translate_check(
+			*priv->pdev,
+			DMAMEM_TO_CPU,
+			(void *)priv->buffer_base_hw,
+			(void **)&priv->buffer_base,
+			priv->buffer_size);
 	} else {
-		if ( (unsigned int)cfg->buffer_custom & 1 ) {
-			/* Custom Address Given in Remote address. We need
-			 * to convert it intoTranslate into Hardware a
-			 * hardware accessible address
-			 */
-			drvmgr_translate(
-				*priv->pdev,
-				1,
-				1,
-				(void *)((unsigned int)cfg->buffer_custom & ~1),
-				(void **)&priv->buffer
-				);
+		if (cfg->buffer_custom == NULL) {
+			/* Allocate new buffer dynamically */
+			priv->buffer = malloc(priv->buffer_size + 8);
+			if (priv->buffer == NULL)
+				return -1;
 		} else {
 			/* Address given in CPU accessible address, no
 			 * translation required.
 			 */
 			priv->buffer = cfg->buffer_custom;
 		}
+		/* Align to 16 bytes */
+		priv->buffer_base = ((unsigned int)priv->buffer + (8-1)) &
+					~(8-1);
+		/* Translate address of buffer base into address that Hardware must
+		 * use to access the buffer.
+		 */
+		drvmgr_translate_check(
+			*priv->pdev,
+			CPUMEM_TO_DMA,
+			(void *)priv->buffer_base,
+			(void **)&priv->buffer_base_hw,
+			priv->buffer_size);
+		
 	}
 
-	/* Align to 16 bytes */
-	priv->buffer_base = ((unsigned int)priv->buffer + (8-1)) & ~(8-1);
-
-	/* Translate address of buffer base into address that Hardware must
-	 * use to access the buffer.
-	 */
-	drvmgr_translate(
-		*priv->pdev,
-		0,
-		0,
-		(void *)priv->buffer_base,
-		(void **)&priv->buffer_base_hw
-		);
-
 	/* Copy valid config */
 	priv->cfg = *cfg;
 
diff --git a/c/src/lib/libbsp/sparc/shared/1553/gr1553rt.c b/c/src/lib/libbsp/sparc/shared/1553/gr1553rt.c
index 7ada4d1ac7..a984b52754 100644
--- a/c/src/lib/libbsp/sparc/shared/1553/gr1553rt.c
+++ b/c/src/lib/libbsp/sparc/shared/1553/gr1553rt.c
@@ -207,7 +207,7 @@ int gr1553rt_bd_alloc(void *rt, struct gr1553rt_sw_bd **bd, int cnt)
 	struct gr1553rt_sw_bd *curr;
 	int i;
 
-	if ( priv->swbd_free_cnt < cnt ) {
+	if ((priv->swbd_free_cnt < cnt) || (cnt <= 0)) {
 		*bd = NULL;
 		return -1;
 	}
@@ -352,8 +352,7 @@ int gr1553rt_bd_init(
 		dataptr &= ~1;
 		drvmgr_translate(
 			*priv->pdev,
-			0,
-			0,
+			CPUMEM_TO_DMA,
 			(void *)dataptr,
 			(void **)&dataptr
 			);
@@ -399,8 +398,7 @@ int gr1553rt_bd_update(
 			dataptr &= ~1;
 			drvmgr_translate(
 				*priv->pdev,
-				0,
-				0,
+				CPUMEM_TO_DMA,
 				(void *)dataptr,
 				(void **)&dataptr
 				);
@@ -832,38 +830,78 @@ int gr1553rt_sw_alloc(struct gr1553rt_priv *priv)
 	int size;
 
 	/* Allocate Event log */
-	if ( priv->cfg.evlog_buffer == NULL ) {
-		priv->evlog_buffer = malloc(priv->cfg.evlog_size * 2);
-	} else if ( (unsigned int)priv->cfg.evlog_buffer & 1 ) {
+	if ((unsigned int)priv->cfg.evlog_buffer & 1) {
 		/* Translate Address from HARDWARE (REMOTE) to CPU-LOCAL */
-		drvmgr_translate(
+		priv->evlog_hw_base = (unsigned int *)
+			((unsigned int)priv->cfg.evlog_buffer & ~0x1);
+		priv->evlog_buffer = priv->cfg.evlog_buffer;
+		drvmgr_translate_check(
 			*priv->pdev,
-			1,
-			1,
-			(void *)((unsigned int)priv->cfg.evlog_buffer & ~0x1),
-			(void **)&priv->evlog_buffer
+			DMAMEM_TO_CPU,
+			(void *)priv->evlog_hw_base,
+			(void **)&priv->evlog_cpu_base,
+			priv->cfg.evlog_size
 			);
 	} else {
-		/* Addess already CPU-LOCAL */
-		priv->evlog_buffer = priv->cfg.evlog_buffer;
+		if (priv->cfg.evlog_buffer == NULL) {
+			priv->evlog_buffer = malloc(priv->cfg.evlog_size * 2);
+			if (priv->evlog_buffer == NULL)
+				return -1;
+		} else {
+			/* Addess already CPU-LOCAL */
+			priv->evlog_buffer = priv->cfg.evlog_buffer;
+		}
+		/* Align to SIZE bytes boundary */
+		priv->evlog_cpu_base = (unsigned int *)
+			(((unsigned int)priv->evlog_buffer +
+			(priv->cfg.evlog_size-1)) & ~(priv->cfg.evlog_size-1));
+
+		drvmgr_translate_check(
+			*priv->pdev,
+			CPUMEM_TO_DMA,
+			(void *)priv->evlog_cpu_base,
+			(void **)&priv->evlog_hw_base,
+			priv->cfg.evlog_size
+			);
 	}
+	priv->evlog_cpu_end = priv->evlog_cpu_base +
+				priv->cfg.evlog_size/sizeof(unsigned int *);
 
 	/* Allocate Transfer Descriptors */
-	if ( priv->cfg.bd_buffer == NULL ) {
-		size = priv->cfg.bd_count * sizeof(struct gr1553rt_bd) + 0xf;
-		priv->bd_buffer = malloc(size);
-	} else if ( (unsigned int)priv->cfg.bd_buffer & 1 ) {
+	priv->bds_cnt = priv->cfg.bd_count;
+	size = priv->bds_cnt * sizeof(struct gr1553rt_bd);
+	if ((unsigned int)priv->cfg.bd_buffer & 1) {
 		/* Translate Address from HARDWARE (REMOTE) to CPU-LOCAL */
-		drvmgr_translate(
+		priv->bds_hw = (unsigned int)priv->cfg.bd_buffer & ~0x1;
+		priv->bd_buffer = priv->cfg.bd_buffer;
+		drvmgr_translate_check(
 			*priv->pdev,
-			1,
-			1,
-			(void *)((unsigned int)priv->cfg.bd_buffer & ~0x1),
-			(void **)&priv->bd_buffer
+			DMAMEM_TO_CPU,
+			(void *)priv->bds_hw,
+			(void **)&priv->bds_cpu,
+			size
 			);
 	} else {
-		/* Addess already CPU-LOCAL */
-		priv->bd_buffer = priv->cfg.bd_buffer;
+		if ( priv->cfg.bd_buffer == NULL ) {
+			priv->bd_buffer = malloc(size + 0xf);
+			if (priv->bd_buffer == NULL)
+				return -1;
+		} else {
+			/* Addess already CPU-LOCAL */
+			priv->bd_buffer	= priv->cfg.bd_buffer;
+		}
+		/* Align to 16 bytes boundary */
+		priv->bds_cpu = (struct gr1553rt_bd *)
+				(((unsigned int)priv->bd_buffer + 0xf) & ~0xf);
+
+		/* Translate from CPU address to hardware address */
+		drvmgr_translate_check(
+			*priv->pdev,
+			CPUMEM_TO_DMA,
+			(void *)priv->bds_cpu,
+			(void **)&priv->bds_hw,
+			size
+			);
 	}
 
 #if (RTBD_MAX == 0)
@@ -875,76 +913,53 @@ int gr1553rt_sw_alloc(struct gr1553rt_priv *priv)
 #endif
 
 	/* Allocate Sub address table */
-	if ( priv->cfg.satab_buffer == NULL ) {
-		priv->satab_buffer = malloc((16 * 32) * 2);
-	} else if ( (unsigned int)priv->cfg.satab_buffer & 1 ) {
+	if ((unsigned int)priv->cfg.satab_buffer & 1) {
 		/* Translate Address from HARDWARE (REMOTE) to CPU-LOCAL */
-		drvmgr_translate(
+		priv->sas_hw = (unsigned int)priv->cfg.satab_buffer & ~0x1;
+		priv->satab_buffer = priv->cfg.satab_buffer;
+		drvmgr_translate_check(
 			*priv->pdev,
-			1,
-			1,
-			(void *)((unsigned int)priv->cfg.satab_buffer & ~0x1),
-			(void **)&priv->satab_buffer
-			);
+			DMAMEM_TO_CPU,
+			(void *)priv->sas_hw,
+			(void **)&priv->sas_cpu,
+			16 * 32);
 	} else {
-		/* Addess already CPU-LOCAL */
-		priv->satab_buffer = priv->cfg.satab_buffer;
-	}
+		if (priv->cfg.satab_buffer == NULL) {
+			priv->satab_buffer = malloc((16 * 32) * 2);
+			if (priv->satab_buffer == NULL)
+				return -1;
+		} else {
+			/* Addess already CPU-LOCAL */
+			priv->satab_buffer = priv->cfg.satab_buffer;
+		}
+		/* Align to 512 bytes boundary */
+		priv->sas_cpu = (struct gr1553rt_sa *)
+				(((unsigned int)priv->satab_buffer + 0x1ff) &
+				~0x1ff);
 
-	if ( !priv->evlog_buffer || !priv->bd_buffer || !priv->satab_buffer )
-		return -1;
+		/* Translate Address from CPU-LOCAL to HARDWARE (REMOTE) */
+		drvmgr_translate_check(
+			*priv->pdev,
+			CPUMEM_TO_DMA,
+			(void *)priv->sas_cpu,
+			(void **)&priv->sas_hw,
+			16 * 32);
+	}
 
 	return 0;
 }
 
 void gr1553rt_sw_init(struct gr1553rt_priv *priv)
 {
-	unsigned int buf;
 	int i;
 
-	/* Align to 512 bytes boundary */
-	buf = (unsigned int)priv->satab_buffer;
-	buf = (buf + 0x1ff) & ~0x1ff;
-	priv->sas_cpu = (struct gr1553rt_sa *)buf;
-	/* Translate Address from CPU-LOCAL to HARDWARE (REMOTE) */
-	drvmgr_translate(
-		*priv->pdev,
-		0,
-		0,
-		(void *)buf,
-		(void **)&priv->sas_hw
-		);
+	/* Clear Sub Address table */
 	memset(priv->sas_cpu, 0, 512);
 
-	/* Align to 16 bytes boundary */
-	buf = (unsigned int)priv->bd_buffer;
-	buf = (buf + 0xf) & ~0xf;
-	priv->bds_cpu = (struct gr1553rt_bd *)buf;
-	/* Translate from CPU address to hardware address */
-	drvmgr_translate(
-		*priv->pdev,
-		0,
-		0,
-		(void *)buf,
-		(void **)&priv->bds_hw
-		);
-	priv->bds_cnt = priv->cfg.bd_count;
+	/* Clear Transfer descriptors */
 	memset(priv->bds_cpu, 0, priv->bds_cnt * 16);
 
-	/* Align to SIZE bytes boundary */
-	buf = (unsigned int)priv->evlog_buffer;
-	buf = (buf + (priv->cfg.evlog_size-1)) & ~(priv->cfg.evlog_size-1);
-	priv->evlog_cpu_base = (unsigned int *)buf;
-	/* Translate from CPU address to hardware address */
-	drvmgr_translate(
-		*priv->pdev,
-		0,
-		0,
-		(void *)buf,
-		(void **)&priv->evlog_hw_base
-		);
-	priv->evlog_cpu_end = priv->evlog_cpu_base +
-			priv->cfg.evlog_size/sizeof(unsigned int *);
+	/* Clear the Event log */
 	memset(priv->evlog_cpu_base, 0, priv->cfg.evlog_size);
 
 	/* Init descriptor allocation algorithm */
diff --git a/c/src/lib/libbsp/sparc/shared/can/grcan.c b/c/src/lib/libbsp/sparc/shared/can/grcan.c
index 251519ac86..1f27d3f390 100644
--- a/c/src/lib/libbsp/sparc/shared/can/grcan.c
+++ b/c/src/lib/libbsp/sparc/shared/can/grcan.c
@@ -123,8 +123,8 @@ struct grcan_priv {
 	unsigned int corefreq_hz;
 
 	/* Circular DMA buffers */
-	void *_rx;
-	void *_tx;
+	void *_rx, *_rx_hw;
+	void *_tx, *_tx_hw;
 	void *txbuf_adr;
 	void *rxbuf_adr;
 	struct grcan_msg *rx;
@@ -456,13 +456,11 @@ static rtems_device_driver grcan_start(struct grcan_priv *pDev)
   }
 
   /* Setup receiver */
-  drvmgr_translate(pDev->dev, 0, 0, (void *)pDev->rx, (void **)&pDev->regs->rx0addr);
-  /*pDev->regs->rx0addr = MEMAREA_TO_HW((unsigned int)pDev->rx);*/
+  pDev->regs->rx0addr = (unsigned int)pDev->_rx_hw;
   pDev->regs->rx0size = pDev->rxbuf_size;
 
   /* Setup Transmitter */
-  drvmgr_translate(pDev->dev, 0, 0, (void *)pDev->tx, (void **)&pDev->regs->tx0addr);
-  /*pDev->regs->tx0addr = MEMAREA_TO_HW((unsigned int)pDev->tx);*/
+  pDev->regs->tx0addr = (unsigned int)pDev->_tx_hw;
   pDev->regs->tx0size = pDev->txbuf_size;
 
   /* Setup acceptance filters */
@@ -1106,38 +1104,95 @@ static int grcan_tx_flush(struct grcan_priv *pDev)
 
 static int grcan_alloc_buffers(struct grcan_priv *pDev, int rx, int tx)
 {
+	unsigned int adr;
 	FUNCDBG();
 
 	if ( tx ) {
-		if ( pDev->txbuf_adr ) {
-			/* User defined address */
-			pDev->_tx = pDev->txbuf_adr;
+		adr = (unsigned int)pDev->txbuf_adr;
+		if (adr & 0x1) {
+			/* User defined "remote" address. Translate it into
+			 * a CPU accessible address
+			 */
+			pDev->_tx_hw = (void *)(adr & ~0x1);
+			drvmgr_translate_check(
+				pDev->dev,
+				DMAMEM_TO_CPU,
+				(void *)pDev->_tx_hw,
+				(void **)&pDev->_tx,
+				pDev->txbuf_size);
+			pDev->tx = (struct grcan_msg *)pDev->_tx;
 		} else {
-			pDev->_tx = malloc(pDev->txbuf_size + BUFFER_ALIGNMENT_NEEDS);
-			if ( !pDev->_tx )
-				return -1;
+			if (adr == 0) {
+				pDev->_tx = malloc(pDev->txbuf_size +
+				                   BUFFER_ALIGNMENT_NEEDS);
+				if (!pDev->_tx)
+					return -1;
+			} else {
+				/* User defined "cou-local" address. Translate
+				 * it into a CPU accessible address
+				 */
+				pDev->_tx = (void *)adr;
+			}
+			/* Align TX buffer */
+			pDev->tx = (struct grcan_msg *)
+			           (((unsigned int)pDev->_tx +
+				   (BUFFER_ALIGNMENT_NEEDS-1)) &
+			           ~(BUFFER_ALIGNMENT_NEEDS-1));
+
+			/* Translate address into an hardware accessible
+			 * address
+			 */
+			drvmgr_translate_check(
+				pDev->dev,
+				CPUMEM_TO_DMA,
+				(void *)pDev->tx,
+				(void **)&pDev->_tx_hw,
+				pDev->txbuf_size);
 		}
-
-		/* Align TX buffer */
-		pDev->tx = (struct grcan_msg *)
-		       (((unsigned int)pDev->_tx + (BUFFER_ALIGNMENT_NEEDS-1)) &
-		       ~(BUFFER_ALIGNMENT_NEEDS-1));
 	}
 
 	if ( rx ) {
-		if ( pDev->rxbuf_adr ) {
-			/* User defined address */
-			pDev->_rx = pDev->rxbuf_adr;
+		adr = (unsigned int)pDev->rxbuf_adr;
+		if (adr & 0x1) {
+			/* User defined "remote" address. Translate it into
+			 * a CPU accessible address
+			 */
+			pDev->_rx_hw = (void *)(adr & ~0x1);
+			drvmgr_translate_check(
+				pDev->dev,
+				DMAMEM_TO_CPU,
+				(void *)pDev->_rx_hw,
+				(void **)&pDev->_rx,
+				pDev->rxbuf_size);
+			pDev->rx = (struct grcan_msg *)pDev->_rx;
 		} else {
-			pDev->_rx = malloc(pDev->rxbuf_size + BUFFER_ALIGNMENT_NEEDS);
-			if ( !pDev->_rx )
-				return -1;
+			if (adr == 0) {
+				pDev->_rx = malloc(pDev->rxbuf_size +
+				                   BUFFER_ALIGNMENT_NEEDS);
+				if (!pDev->_rx)
+					return -1;
+			} else {
+				/* User defined "cou-local" address. Translate
+				 * it into a CPU accessible address
+				 */
+				pDev->_rx = (void *)adr;
+			}
+			/* Align RX buffer */
+			pDev->rx = (struct grcan_msg *)
+			           (((unsigned int)pDev->_rx +
+				   (BUFFER_ALIGNMENT_NEEDS-1)) &
+			           ~(BUFFER_ALIGNMENT_NEEDS-1));
+
+			/* Translate address into an hardware accessible
+			 * address
+			 */
+			drvmgr_translate_check(
+				pDev->dev,
+				CPUMEM_TO_DMA,
+				(void *)pDev->rx,
+				(void **)&pDev->_rx_hw,
+				pDev->rxbuf_size);
 		}
-
-		/* Align RX buffer */
-		pDev->rx = (struct grcan_msg *)
-		       (((unsigned int)pDev->_rx + (BUFFER_ALIGNMENT_NEEDS-1)) &
-		       ~(BUFFER_ALIGNMENT_NEEDS-1));
 	}
 	return 0;
 }
diff --git a/c/src/lib/libbsp/sparc/shared/graes/graes.c b/c/src/lib/libbsp/sparc/shared/graes/graes.c
index 1e729837b7..e1778a4dce 100644
--- a/c/src/lib/libbsp/sparc/shared/graes/graes.c
+++ b/c/src/lib/libbsp/sparc/shared/graes/graes.c
@@ -466,7 +466,8 @@ static int graes_start(struct graes_priv *pDev)
 
 
 	/* Set Descriptor Pointer Base register to point to first descriptor */
-	drvmgr_translate(pDev->dev, 0, 0, (void *)pDev->bds, (void **)&transaddr);
+	drvmgr_translate_check(pDev->dev, CPUMEM_TO_DMA, (void *)pDev->bds,
+			       (void **)&transaddr, GRAES_BDAR_SIZE);
 	regs->dma_bd = transaddr;
 	
 	DBG("GRAES: set bd to 0x%08x\n",transaddr);
@@ -699,7 +700,7 @@ static unsigned int graes_trans(struct graes_priv *pDev, struct graes_block *cur
 	 */
 	if ( curr_frm->flags & (GRAES_FLAGS_TRANSLATE|GRAES_FLAGS_TRANSLATE_AND_REMEMBER) ) {
 		/* Do translation */
-		drvmgr_translate(pDev->dev, 0, 0, (void *)addr_in, (void **)&addr);
+		drvmgr_translate(pDev->dev, CPUMEM_TO_DMA, (void *)addr_in, (void **)&addr);
 		if ( curr_frm->flags & GRAES_FLAGS_TRANSLATE_AND_REMEMBER ) {
 			if ( addr_in != addr ) {
 				/* Translation needed */
@@ -770,7 +771,7 @@ static int graes_schedule_ready(struct graes_priv *pDev, int ints_off)
 			curr_bd->bd->u.d[i++] = addr;
 		}
 
-		drvmgr_translate(pDev->dev, 0, 0, (void *)curr_bd->next->bd, (void **)&naddr);
+		drvmgr_translate(pDev->dev, CPUMEM_TO_DMA, (void *)curr_bd->next->bd, (void **)&naddr);
 		curr_bd->bd->u.d[i++] = naddr;
 
 		if ( curr_bd->next == pDev->_ring ){
diff --git a/c/src/lib/libbsp/sparc/shared/grpwrx/grpwrx.c b/c/src/lib/libbsp/sparc/shared/grpwrx/grpwrx.c
index 2f29c148a4..bfc6462b48 100644
--- a/c/src/lib/libbsp/sparc/shared/grpwrx/grpwrx.c
+++ b/c/src/lib/libbsp/sparc/shared/grpwrx/grpwrx.c
@@ -530,7 +530,12 @@ static int grpwrx_start(struct grpwrx_priv *pDev)
 	regs->dma_status = GRPWRX_DMA_STS_ALL;
 
 	/* Set Descriptor Pointer Base register to point to first descriptor */
-	drvmgr_translate(pDev->dev, 0, 0, (void *)pDev->bds, (void **)&transaddr);
+	drvmgr_translate_check(
+		pDev->dev,
+		CPUMEM_TO_DMA,
+		(void *)pDev->bds,
+		(void **)&transaddr,
+		GRPWRX_BDAR_SIZE);
 	regs->dma_bd = transaddr;
 
 	DBG("GRPWRX: set bd to 0x%08x\n",transaddr);
@@ -789,7 +794,7 @@ static int grpwrx_schedule_ready(struct grpwrx_priv *pDev, int ints_off)
 		 */
 		if ( curr_frm->flags & (GRPWRX_FLAGS_TRANSLATE|GRPWRX_FLAGS_TRANSLATE_AND_REMEMBER) ) {
 			/* Do translation */
-			drvmgr_translate(pDev->dev, 0, 0, (void *)curr_frm->payload, (void **)&transaddr);
+			drvmgr_translate(pDev->dev, CPUMEM_TO_DMA, (void *)curr_frm->payload, (void **)&transaddr);
 			curr_bd->bd->address = transaddr;
 			if ( curr_frm->flags & GRPWRX_FLAGS_TRANSLATE_AND_REMEMBER ) {
 				if ( curr_frm->payload != curr_bd->bd->address ) {
diff --git a/c/src/lib/libbsp/sparc/shared/net/greth.c b/c/src/lib/libbsp/sparc/shared/net/greth.c
index fea8890c72..d72158627a 100644
--- a/c/src/lib/libbsp/sparc/shared/net/greth.c
+++ b/c/src/lib/libbsp/sparc/shared/net/greth.c
@@ -203,11 +203,11 @@ struct greth_softc
 int greth_process_tx_gbit(struct greth_softc *sc);
 int greth_process_tx(struct greth_softc *sc);
 
-static char *almalloc(int sz)
+static char *almalloc(int sz, int alignment)
 {
         char *tmp;
-        tmp = calloc(1,2*sz);
-        tmp = (char *) (((int)tmp+sz) & ~(sz -1));
+        tmp = calloc(1, sz + (alignment-1));
+        tmp = (char *) (((int)tmp+alignment) & ~(alignment -1));
         return(tmp);
 }
 
@@ -490,17 +490,26 @@ auto_neg_done:
         ;
     regs->ctrl = GRETH_CTRL_DD;
 
-    /* Initialize rx/tx descriptor pointers */
-    sc->txdesc = (greth_rxtxdesc *) almalloc(1024);
-    sc->rxdesc = (greth_rxtxdesc *) almalloc(1024);
+    /* Initialize rx/tx descriptor table pointers. Due to alignment we 
+     * always allocate maximum table size.
+     */
+    sc->txdesc = (greth_rxtxdesc *) almalloc(0x800, 0x400);
+    sc->rxdesc = (greth_rxtxdesc *) &sc->txdesc[128];
     sc->tx_ptr = 0;
     sc->tx_dptr = 0;
     sc->tx_cnt = 0;
     sc->rx_ptr = 0;
 
-    /* Translate the base address into an address that the GRETH core can understand */
-    drvmgr_translate(sc->dev, 0, 0, (void *)sc->txdesc, (void **)&sc->txdesc_remote);
-    drvmgr_translate(sc->dev, 0, 0, (void *)sc->rxdesc, (void **)&sc->rxdesc_remote);
+    /* Translate the Descriptor DMA table base address into an address that
+     * the GRETH core can understand
+     */
+    drvmgr_translate_check(
+        sc->dev,
+        CPUMEM_TO_DMA,
+        (void *)sc->txdesc,
+        (void **)&sc->txdesc_remote,
+        0x800);
+    sc->rxdesc_remote = sc->txdesc_remote + 0x400;
     regs->txdesc = (int) sc->txdesc_remote;
     regs->rxdesc = (int) sc->rxdesc_remote;
 
@@ -509,10 +518,15 @@ auto_neg_done:
 
     for (i = 0; i < sc->txbufs; i++)
       {
-              sc->txdesc[i].ctrl = 0;
-              if (!(sc->gbit_mac)) {
-                      drvmgr_translate(sc->dev, 0, 0, (void *)malloc(GRETH_MAXBUF_LEN), (void **)&sc->txdesc[i].addr);
-              }
+        sc->txdesc[i].ctrl = 0;
+        if (!(sc->gbit_mac)) {
+            drvmgr_translate_check(
+                sc->dev, 
+                CPUMEM_TO_DMA,
+                (void *)malloc(GRETH_MAXBUF_LEN),
+                (void **)&sc->txdesc[i].addr,
+                GRETH_MAXBUF_LEN);
+        }
 #ifdef GRETH_DEBUG
               /* printf("TXBUF: %08x\n", (int) sc->txdesc[i].addr); */
 #endif
@@ -525,7 +539,12 @@ auto_neg_done:
                   m->m_data += 2;
 	  m->m_pkthdr.rcvif = &sc->arpcom.ac_if;
           sc->rxmbuf[i] = m;
-          drvmgr_translate(sc->dev, 0, 0, (void *)mtod(m, uint32_t *), (void **)&sc->rxdesc[i].addr);
+          drvmgr_translate_check(
+            sc->dev,
+            CPUMEM_TO_DMA,
+            (void *)mtod(m, uint32_t *),
+            (void **)&sc->rxdesc[i].addr,
+            GRETH_MAXBUF_LEN);
           sc->rxdesc[i].ctrl = GRETH_RXD_ENABLE | GRETH_RXD_IRQ;
 #ifdef GRETH_DEBUG
 /* 	  printf("RXBUF: %08x\n", (int) sc->rxdesc[i].addr); */
@@ -718,7 +737,12 @@ again:
                                     m->m_data += 2;
                             dp->rxmbuf[dp->rx_ptr] = m;
                             m->m_pkthdr.rcvif = ifp;
-                            drvmgr_translate(dp->dev, 0, 0, (void *)mtod (m, uint32_t *), (void **)&dp->rxdesc[dp->rx_ptr].addr);
+                            drvmgr_translate_check(
+                                dp->dev,
+                                CPUMEM_TO_DMA,
+                                (void *)mtod (m, uint32_t *),
+                                (void **)&dp->rxdesc[dp->rx_ptr].addr,
+                                GRETH_MAXBUF_LEN);
                             dp->rxPackets++;
                     }
                     if (dp->rx_ptr == dp->rxbufs - 1) {
@@ -773,7 +797,7 @@ sendpacket (struct ifnet *ifp, struct mbuf *m)
 
     len = 0;
     temp = (unsigned char *) GRETH_MEM_LOAD(&dp->txdesc[dp->tx_ptr].addr);
-    drvmgr_translate(dp->dev, 1, 1, (void *)temp, (void **)&temp);
+    drvmgr_translate(dp->dev, CPUMEM_FROM_DMA, (void *)temp, (void **)&temp);
 #ifdef GRETH_DEBUG
     printf("TXD: 0x%08x : BUF: 0x%08x\n", (int) m->m_data, (int) temp);
 #endif
@@ -887,7 +911,12 @@ sendpacket_gbit (struct ifnet *ifp, struct mbuf *m)
             printf("\n");
 #endif
             len += m->m_len;
-            drvmgr_translate(dp->dev, 0, 0, (void *)(uint32_t *)m->m_data, (void **)&dp->txdesc[dp->tx_ptr].addr);
+            drvmgr_translate_check(
+                dp->dev,
+                CPUMEM_TO_DMA,
+                (void *)(uint32_t *)m->m_data,
+                (void **)&dp->txdesc[dp->tx_ptr].addr,
+                m->m_len);
 
             /* Wrap around? */
             if (dp->tx_ptr < dp->txbufs-1) {
diff --git a/c/src/lib/libbsp/sparc/shared/spw/grspw.c b/c/src/lib/libbsp/sparc/shared/spw/grspw.c
index 42dbeae887..2e3ae5c37c 100644
--- a/c/src/lib/libbsp/sparc/shared/spw/grspw.c
+++ b/c/src/lib/libbsp/sparc/shared/spw/grspw.c
@@ -159,11 +159,12 @@ typedef struct {
    char *ptr_rxbuf0;
    char *ptr_txdbuf0;
    char *ptr_txhbuf0;
-   char *ptr_bd0;
+   char *_ptr_bd0, *ptr_bd0;
 
    char *ptr_rxbuf0_remote;
    char *ptr_txdbuf0_remote;
    char *ptr_txhbuf0_remote;
+   char *ptr_bd0_remote;
 
    unsigned int irq;
    int minor;
@@ -655,73 +656,122 @@ static unsigned int grspw_calc_disconnect(int freq_khz){
 
 static int grspw_buffer_alloc(GRSPW_DEV *pDev)
 {
-	if ( pDev->rx_dma_area ) {
-#warning Check size?
-		if ( pDev->rx_dma_area & 1 ) {
-			/* Address given in remote address */
-			drvmgr_translate(pDev->dev, 1, 1, (void *)(pDev->rx_dma_area & ~1), (void **)&pDev->ptr_rxbuf0);
-		} else {
-			pDev->ptr_rxbuf0 = pDev->rx_dma_area;
-		}
+	/* RX DMA AREA */
+	if (pDev->rx_dma_area & 1) {
+		/* Address given in remote address */
+		pDev->ptr_rxbuf0_remote = (char *)(pDev->rx_dma_area & ~1);
+		drvmgr_translate_check(
+			pDev->dev,
+			DMAMEM_TO_CPU,
+			(void *)pDev->ptr_rxbuf0_remote,
+			(void **)&pDev->ptr_rxbuf0,
+			pDev->rxbufsize * pDev->rxbufcnt);
+		
 	} else {
-		if (pDev->_ptr_rxbuf0) {
-			free(pDev->_ptr_rxbuf0);
-		}
-		pDev->_ptr_rxbuf0 = (unsigned int) malloc(pDev->rxbufsize * pDev->rxbufcnt+4);
-		pDev->ptr_rxbuf0 = (char *)((pDev->_ptr_rxbuf0+7)&~7);
-		if ( !pDev->ptr_rxbuf0 )
-			return 1;
-	}
-	if ( pDev->tx_data_dma_area ) {
-		if ( pDev->tx_data_dma_area & 1 ) {
-			/* Address given in remote address */
-			drvmgr_translate(pDev->dev, 1, 1, (void *)(pDev->tx_data_dma_area & ~1), (void **)&pDev->ptr_txdbuf0);
+		if (pDev->rx_dma_area == 0) {
+			if (pDev->_ptr_rxbuf0)
+				free((void *)pDev->_ptr_rxbuf0);
+			pDev->_ptr_rxbuf0 = (unsigned int) malloc(pDev->rxbufsize * pDev->rxbufcnt+4);
+			pDev->ptr_rxbuf0 = (char *)((pDev->_ptr_rxbuf0+7)&~7);
+			if ( !pDev->ptr_rxbuf0 )
+				return 1;
 		} else {
-			pDev->ptr_txdbuf0 = pDev->tx_data_dma_area;
+			pDev->ptr_rxbuf0 = (char *)pDev->rx_dma_area;
 		}
-	} else {
-		if (pDev->ptr_txdbuf0) {
-			free(pDev->ptr_txdbuf0);
-		}
-		pDev->ptr_txdbuf0 = (char *) malloc(pDev->txdbufsize * pDev->txbufcnt);
-		if ( !pDev->ptr_txdbuf0 )
-			return 1;
+		drvmgr_translate_check(
+			pDev->dev,
+			CPUMEM_TO_DMA,
+			(void *)pDev->ptr_rxbuf0,
+			(void **)&pDev->ptr_rxbuf0_remote,
+			pDev->rxbufsize * pDev->rxbufcnt);
 	}
-	if ( pDev->tx_hdr_dma_area ) {
-		if ( pDev->tx_hdr_dma_area & 1 ) {
-			/* Address given in remote address */
-			drvmgr_translate(pDev->dev, 1, 1, (void *)(pDev->tx_hdr_dma_area & ~1), (void **)&pDev->ptr_txhbuf0);
-		} else {
-			pDev->ptr_txhbuf0 = pDev->tx_hdr_dma_area;
-		}
+
+	/* TX-DATA DMA AREA */
+	if (pDev->tx_data_dma_area & 1) {
+		/* Address given in remote address */
+		pDev->ptr_txdbuf0_remote = (char*)(pDev->tx_data_dma_area & ~1);
+		drvmgr_translate_check(
+			pDev->dev,
+			DMAMEM_TO_CPU,
+			(void *)pDev->ptr_txdbuf0_remote,
+			(void **)&pDev->ptr_txdbuf0,
+			pDev->txdbufsize * pDev->txbufcnt);
 	} else {
-		if (pDev->ptr_txhbuf0) {
-			free(pDev->ptr_txhbuf0);
+		if (pDev->tx_data_dma_area == 0) {
+			if (pDev->ptr_txdbuf0)
+				free(pDev->ptr_txdbuf0);
+			pDev->ptr_txdbuf0 = (char *) malloc(pDev->txdbufsize * pDev->txbufcnt);
+			if (!pDev->ptr_txdbuf0)
+				return 1;
+		} else {
+			pDev->ptr_txdbuf0 = (char *)pDev->tx_data_dma_area;
 		}
-		pDev->ptr_txhbuf0 = (char *) malloc(pDev->txhbufsize * pDev->txbufcnt);
-		if ( !pDev->ptr_txhbuf0 )
-			return 1;
+		drvmgr_translate_check(
+			pDev->dev,
+			CPUMEM_TO_DMA,
+			(void *)pDev->ptr_txdbuf0,
+			(void **)&pDev->ptr_txdbuf0_remote,
+			pDev->txdbufsize * pDev->txbufcnt);
 	}
-	if ( pDev->bd_dma_area ) {
-		if ( pDev->bd_dma_area & 1 ) {
-			/* Address given in remote address */
-			drvmgr_translate(pDev->dev, 1, 1, (void *)(pDev->bd_dma_area & ~1), (void **)&pDev->ptr_bd0);
+
+	/* TX-HEADER DMA AREA */
+	if (pDev->tx_hdr_dma_area & 1) {
+		/* Address given in remote address */
+		pDev->ptr_txhbuf0_remote = (char *)(pDev->tx_hdr_dma_area & ~1);
+		drvmgr_translate_check(
+			pDev->dev,
+			DMAMEM_TO_CPU,
+			(void *)pDev->ptr_txhbuf0_remote,
+			(void **)&pDev->ptr_txhbuf0,
+			pDev->txhbufsize * pDev->txbufcnt);
+	} else {
+		if (pDev->tx_hdr_dma_area == 0) {
+			if (pDev->ptr_txhbuf0)
+				free(pDev->ptr_txhbuf0);
+			pDev->ptr_txhbuf0 = (char *) malloc(pDev->txhbufsize * pDev->txbufcnt);
+			if (!pDev->ptr_txhbuf0)
+				return 1;
 		} else {
-			pDev->ptr_bd0 = pDev->bd_dma_area;
+			pDev->ptr_txhbuf0 = (char *)pDev->tx_hdr_dma_area;
 		}
+		drvmgr_translate_check(
+			pDev->dev,
+			CPUMEM_TO_DMA,
+			(void *)pDev->ptr_txhbuf0,
+			(void **)&pDev->ptr_txhbuf0_remote,
+			pDev->txhbufsize * pDev->txbufcnt);
+	}
+
+	/* DMA DESCRIPTOR TABLES */
+	if (pDev->bd_dma_area & 1) {
+		/* Address given in remote address */
+		pDev->ptr_bd0_remote = (char *)(pDev->bd_dma_area & ~1);
+		drvmgr_translate_check(
+			pDev->dev,
+			DMAMEM_TO_CPU,
+			(void *)pDev->ptr_bd0_remote,
+			(void **)&pDev->ptr_bd0,
+			2 * SPACEWIRE_BDTABLE_SIZE);
 	} else {
-		if (pDev->ptr_bd0) {
-			free(pDev->ptr_bd0);
+		if (pDev->bd_dma_area == 0) {
+			if (pDev->_ptr_bd0)
+				free(pDev->_ptr_bd0);
+			pDev->_ptr_bd0 = malloc(3 * SPACEWIRE_BDTABLE_SIZE);
+			if (!pDev->_ptr_bd0)
+				return 1;
+			pDev->ptr_bd0 = (char *)SPW_ALIGN(pDev->_ptr_bd0,
+					SPACEWIRE_BDTABLE_SIZE);
+		} else {
+			pDev->ptr_bd0 = (char *)pDev->bd_dma_area;
 		}
-		pDev->ptr_bd0 = (char *) malloc(3*SPACEWIRE_BDTABLE_SIZE);
-		if ( !pDev->ptr_bd0 )
-			return 1;
+		drvmgr_translate_check(
+			pDev->dev, 
+			CPUMEM_TO_DMA,
+			(void *)pDev->ptr_bd0,
+			(void **)&pDev->ptr_bd0_remote,
+			2 * SPACEWIRE_BDTABLE_SIZE);
 	}
 
-	/* Translate into remote address */
-	drvmgr_translate(pDev->dev, 0, 0, (void *)pDev->ptr_rxbuf0, (void **)&pDev->ptr_rxbuf0_remote);
-	drvmgr_translate(pDev->dev, 0, 0, (void *)pDev->ptr_txdbuf0,(void **)&pDev->ptr_txdbuf0_remote);
-	drvmgr_translate(pDev->dev, 0, 0, (void *)pDev->ptr_txhbuf0, (void **)&pDev->ptr_txhbuf0_remote);
 	return 0;
 }
 
@@ -1592,12 +1642,12 @@ static int grspw_hw_init(GRSPW_DEV *pDev) {
 
 	ctrl = SPW_CTRL_READ(pDev);
 
-	pDev->rx = (SPACEWIRE_RXBD *) SPW_ALIGN(pDev->ptr_bd0, SPACEWIRE_BDTABLE_SIZE);
-	pDev->tx = (SPACEWIRE_TXBD *) &pDev->rx[SPACEWIRE_RXBUFS_NR];
+	pDev->rx = (SPACEWIRE_RXBD *) pDev->ptr_bd0;
+	pDev->tx = (SPACEWIRE_TXBD *) (pDev->ptr_bd0 + SPACEWIRE_BDTABLE_SIZE);
 
-	/* Translate into remote address */
-	drvmgr_translate(pDev->dev, 0, 0, (void *)pDev->rx, (void **)&pDev->rx_remote);
-	drvmgr_translate(pDev->dev, 0, 0, (void *)pDev->tx, (void **)&pDev->tx_remote);
+	/* Set up remote addresses */
+	pDev->rx_remote = (unsigned int)pDev->ptr_bd0_remote;
+	pDev->tx_remote = pDev->rx_remote + SPACEWIRE_BDTABLE_SIZE;
 
 	SPACEWIRE_DBG("hw_init [minor %i]\n", pDev->minor);
 
@@ -1779,7 +1829,6 @@ int grspw_hw_send(GRSPW_DEV *pDev, unsigned int hlen, char *hdr, unsigned int dl
 	char *txd = pDev->ptr_txdbuf0 + (cur * pDev->txdbufsize);
 	char *txh_remote = pDev->ptr_txhbuf0_remote + (cur * pDev->txhbufsize);
 	char *txd_remote = pDev->ptr_txdbuf0_remote + (cur * pDev->txdbufsize);
-	unsigned int tmp, tmp2;
 	
 	ctrl = SPW_READ((volatile void *)&pDev->tx[cur].ctrl);
 
diff --git a/c/src/lib/libbsp/sparc/shared/spw/grspw_pkt.c b/c/src/lib/libbsp/sparc/shared/spw/grspw_pkt.c
index 10a869748d..3573812718 100644
--- a/c/src/lib/libbsp/sparc/shared/spw/grspw_pkt.c
+++ b/c/src/lib/libbsp/sparc/shared/spw/grspw_pkt.c
@@ -483,6 +483,7 @@ void *grspw_open(int dev_no)
 	 *  - 128 RX descriptors per DMA Channel
 	 *  - 64 TX descriptors per DMA Channel
  	 */
+	bdtabsize = 2 * BDTAB_SIZE * priv->hwsup.ndma_chans;
 	value = drvmgr_dev_key_get(priv->dev, "bdDmaArea", KEY_TYPE_INT);
 	if (value) {
 		priv->bd_mem = value->i;
@@ -494,7 +495,6 @@ void *grspw_open(int dev_no)
 			goto out;
 		}
 	} else {
-		bdtabsize = 2 * BDTAB_SIZE * priv->hwsup.ndma_chans;
 		priv->bd_mem_alloced = (unsigned int)malloc(bdtabsize + BDTAB_ALIGN - 1);
 		if (priv->bd_mem_alloced == 0) {
 			priv = NULL;
@@ -508,7 +508,12 @@ void *grspw_open(int dev_no)
 	/* Translate into DMA address that HW can use to access DMA
 	 * descriptors
 	 */
-	drvmgr_translate(priv->dev, 0, 0, (void *)priv->bd_mem, (void **)&hwa);
+	drvmgr_translate_check(
+		priv->dev,
+		CPUMEM_TO_DMA,
+		(void *)priv->bd_mem,
+		(void **)&hwa,
+		bdtabsize);
 
 	GRSPW_DBG("GRSPW%d DMA descriptor table setup: (alloced:%p, bd_mem:%p, size: %d)\n",
 		priv->index, priv->bd_mem_alloced, priv->bd_mem, bdtabsize + BDTAB_ALIGN - 1);
@@ -968,7 +973,8 @@ STATIC int grspw_rx_schedule_ready(struct grspw_dma_priv *dma)
 		/* Prepare descriptor address. */
 		hwaddr = curr_pkt->data;
 		if (curr_pkt->flags & PKT_FLAG_TR_DATA) {
-			drvmgr_translate(dma->core->dev, 0, 0, hwaddr, &hwaddr);
+			drvmgr_translate(dma->core->dev, CPUMEM_TO_DMA,
+					 hwaddr, &hwaddr);
 			if (curr_pkt->data == hwaddr) /* translation needed? */
 				curr_pkt->flags &= ~PKT_FLAG_TR_DATA;
 		}
@@ -1182,7 +1188,8 @@ STATIC int grspw_tx_schedule_send(struct grspw_dma_priv *dma)
 		if (curr_pkt->hdr && curr_pkt->hlen) {
 			hwaddr = curr_pkt->hdr;
 			if (curr_pkt->flags & PKT_FLAG_TR_HDR) {
-				drvmgr_translate(dma->core->dev, 0, 0, hwaddr, &hwaddr);
+				drvmgr_translate(dma->core->dev, CPUMEM_TO_DMA,
+						 hwaddr, &hwaddr);
 				/* translation needed? */
 				if (curr_pkt->hdr == hwaddr)
 					curr_pkt->flags &= ~PKT_FLAG_TR_HDR;
@@ -1221,7 +1228,8 @@ STATIC int grspw_tx_schedule_send(struct grspw_dma_priv *dma)
 		if (curr_pkt->data && curr_pkt->dlen) {
 			hwaddr = curr_pkt->data;
 			if (curr_pkt->flags & PKT_FLAG_TR_DATA) {
-				drvmgr_translate(dma->core->dev, 0, 0, hwaddr, &hwaddr);
+				drvmgr_translate(dma->core->dev, CPUMEM_TO_DMA,
+						 hwaddr, &hwaddr);
 				/* translation needed? */
 				if (curr_pkt->data == hwaddr)
 					curr_pkt->flags &= ~PKT_FLAG_TR_DATA;
diff --git a/c/src/lib/libbsp/sparc/shared/tmtc/grtc.c b/c/src/lib/libbsp/sparc/shared/tmtc/grtc.c
index 470c5c7eb4..3c8a90ef07 100644
--- a/c/src/lib/libbsp/sparc/shared/tmtc/grtc.c
+++ b/c/src/lib/libbsp/sparc/shared/tmtc/grtc.c
@@ -1629,22 +1629,26 @@ static rtems_device_driver grtc_ioctl(rtems_device_major_number major, rtems_dev
 		pDev->buf = NULL;
 		pDev->len = buf_arg->length*1024;
 
-		if ( pDev->len > 0 ){
-			if ( buf_arg->custom_buffer ){
-				if ( (unsigned int)buf_arg->custom_buffer & 1 ) {
-					/* Remote address given, the address is as the GRTC core looks at it */
-					
-					/* Translate the base address into an address that the the CPU can understand */
-					mem = ((unsigned int)buf_arg->custom_buffer & ~1);
-					drvmgr_translate(pDev->dev, 1, 1, (void *)mem, (void **)&pDev->buf);
-				} else {
-					pDev->buf = buf_arg->custom_buffer;
-				}
-				pDev->buf_custom = 1;
-			}else{
+		if (pDev->len <= 0)
+			break;
+		mem = (unsigned int)buf_arg->custom_buffer;
+		pDev->buf_custom = mem;
+
+		if (mem & 1) {
+			/* Remote address given, the address is as the GRTC
+			 * core looks at it. Translate the base address into
+			 * an address that the CPU can understand.
+			 */
+			pDev->buf_remote = (void *)(mem & ~0x1);
+			drvmgr_translate_check(pDev->dev, DMAMEM_TO_CPU,
+						(void *)pDev->buf_remote,
+						(void **)&pDev->buf,
+						pDev->len);
+		} else {
+			if (mem == 0) {
 				pDev->buf = grtc_memalign((~GRTC_ASR_BUFST)+1,pDev->len,&pDev->_buf);
 				DBG("grtc_ioctl: SETBUF: new buf: 0x%x(0x%x), Len: %d\n",pDev->buf,pDev->_buf,pDev->len);
-				if ( !pDev->buf ){
+				if (!pDev->buf){
 					pDev->len = 0;
 					pDev->buf_custom = 0;
 					pDev->_buf = NULL;
@@ -1652,10 +1656,19 @@ static rtems_device_driver grtc_ioctl(rtems_device_major_number major, rtems_dev
 					DBG("GRTC: Failed to allocate memory\n");
 					return RTEMS_NO_MEMORY;
 				}
+			} else{
+				pDev->buf = buf_arg->custom_buffer;
 			}
+
+			/* Translate into a remote address so that GRTC core
+			 * on a remote AMBA bus (for example over the PCI bus)
+			 * gets a valid address
+			 */
+			drvmgr_translate_check(pDev->dev, CPUMEM_TO_DMA,
+						(void *)pDev->buf,
+						(void **)&pDev->buf_remote,
+						pDev->len);
 		}
-		/* Translate into a remote address so that GRTC core on a remote AMBA bus (for example over the PCI bus) gets a valid address */
-		drvmgr_translate(pDev->dev, 0, 0, (void *)pDev->buf, (void **)&pDev->buf_remote);
 		break;
 
 		case GRTC_IOC_GET_BUF_PARAM:
diff --git a/c/src/lib/libbsp/sparc/shared/tmtc/grtm.c b/c/src/lib/libbsp/sparc/shared/tmtc/grtm.c
index 8c5bc95b93..fcea522bd4 100644
--- a/c/src/lib/libbsp/sparc/shared/tmtc/grtm.c
+++ b/c/src/lib/libbsp/sparc/shared/tmtc/grtm.c
@@ -810,8 +810,8 @@ static int grtm_start(struct grtm_priv *pDev)
 	regs->dma_status = GRTM_DMA_STS_ALL;
 
 	/* Set Descriptor Pointer Base register to point to first descriptor */
-	drvmgr_translate(pDev->dev, 0, 0, (void *)pDev->bds, (void **)&regs->dma_bd);
-	/*regs->dma_bd = (unsigned int)pDev->bds;*/
+	drvmgr_translate_check(pDev->dev, CPUMEM_TO_DMA, (void *)pDev->bds,
+				(void **)&regs->dma_bd, 0x400);
 
 	/* Set hardware options as defined by config */
 	if ( grtm_hw_set_config(pDev, cfg, &pDev->hw_avail) ) {
@@ -1103,7 +1103,7 @@ static int grtm_schedule_ready(struct grtm_priv *pDev, int ints_off)
 		 */
 		if ( curr_frm->flags & (GRTM_FLAGS_TRANSLATE|GRTM_FLAGS_TRANSLATE_AND_REMEMBER) ) {
 			/* Do translation */
-			drvmgr_translate(pDev->dev, 0, 0, (void *)curr_frm->payload, (void **)&curr_bd->bd->address);
+			drvmgr_translate(pDev->dev, CPUMEM_TO_DMA, (void *)curr_frm->payload, (void **)&curr_bd->bd->address);
 			if ( curr_frm->flags & GRTM_FLAGS_TRANSLATE_AND_REMEMBER ) {
 				if ( curr_frm->payload != curr_bd->bd->address ) {
 					/* Translation needed */
diff --git a/cpukit/libdrvmgr/Makefile.am b/cpukit/libdrvmgr/Makefile.am
index 898db65999..d93854a6c4 100644
--- a/cpukit/libdrvmgr/Makefile.am
+++ b/cpukit/libdrvmgr/Makefile.am
@@ -27,6 +27,7 @@ libdrvmgr_a_SOURCES += drvmgr_print.c
 libdrvmgr_a_SOURCES += drvmgr_res.c
 libdrvmgr_a_SOURCES += drvmgr_rw.c
 libdrvmgr_a_SOURCES += drvmgr_translate.c
+libdrvmgr_a_SOURCES += drvmgr_translate_check.c
 libdrvmgr_a_SOURCES += drvmgr_unregister.c
 
 include $(top_srcdir)/automake/local.am
diff --git a/cpukit/libdrvmgr/drvmgr.h b/cpukit/libdrvmgr/drvmgr.h
index 05c6956bcb..09d46ea4b2 100644
--- a/cpukit/libdrvmgr/drvmgr.h
+++ b/cpukit/libdrvmgr/drvmgr.h
@@ -613,44 +613,86 @@ extern int drvmgr_interrupt_mask(
 	struct drvmgr_dev *dev,
 	int index);
 
+/*! drvmgr_translate() translation options */
+enum drvmgr_tr_opts {
+	/* Translate CPU RAM Address (input) to DMA unit accessible address
+	 * (output), this is an upstreams translation in reverse order.
+	 *
+	 * Typical Usage:
+	 * It is common to translate a CPU accessible RAM address to an
+	 * address that DMA units can access over bridges.
+	 */
+	CPUMEM_TO_DMA = 0x0,
+
+	/* Translate DMA Unit Accessible address mapped to CPU RAM (input) to
+	 * CPU accessible address (output). This is an upstreams translation.
+	 *
+	 * Typical Usage (not often used):
+	 * The DMA unit descriptors contain pointers to DMA buffers located at
+	 * CPU RAM addresses that the DMA unit can access, the CPU processes
+	 * the descriptors and want to access the data but a translation back
+	 * to CPU address is required.
+	 */
+	CPUMEM_FROM_DMA = 0x1,
+
+	/* Translate DMA Memory Address (input) to CPU accessible address
+	 * (output), this is a downstreams translation in reverse order.
+	 *
+	 * Typical Usage:
+	 * A PCI network card puts packets into its memory not doing DMA over
+	 * PCI, in order for the CPU to access them the PCI address must be
+	 * translated.
+	 */
+	DMAMEM_TO_CPU = 0x2,
+
+	/* Translate CPU accessible address (input) mapped to DMA Memory Address
+	 * to DMA Unit accessible address (output). This is a downstreams
+	 * translation.
+	 */
+	DMAMEM_FROM_CPU = 0x3,
+};
+#define DRVMGR_TR_REVERSE 0x1	/* do reverse translation direction order */
+#define DRVMGR_TR_PATH 0x2	/* 0x0=down-stream 0x2=up-stream address path */
+ 
 /*! Translate an address on one bus to an address on another bus.
  *
  *  The device determines source or destination bus, the root bus is always
  *  the other bus. It is assumed that the CPU is located on the root bus or
- *  that it can access it without address translation (mapped 1:1).
- *
- *  cpu_addresses determines if the address is targeted for the CPU (1) or
- *  hardware (0) doing DMA.
- *
- *  The address conversion can be done up-streams (towards the CPU) or down-
- *  streams (towards DMA hardware) the bus architecture. The CPU is assumed
- *  to be located on level 0 top most in the bus hierarchy.
+ *  that it can access it without address translation (mapped 1:1). The CPU
+ *  is thus assumed to be located on level 0 top most in the bus hierarchy.
  *
- *  Source address is translated and the result is put into *dst_address, if
- *  the address is not accessible on the other bus -1 is returned.
+ *  If no map is present in the bus driver src_address is translated 1:1
+ *  (just copied).
  *
+ *  Addresses are typically converted up-streams from the DMA unit towards the
+ *  CPU (DMAMEM_TO_CPU) or down-streams towards DMA hardware from the CPU
+ *  (CPUMEM_TO_DMA) over one or multiple bridges depending on bus architecture.
+ *  See 'enum drvmgr_tr_opts' for other translation direction options.
+ *  For example:
  *  Two common operations is to translate a CPU accessible RAM address to an
- *  address that DMA units can access (dev=DMA-unit, cpu_address=0, upstream=0,
+ *  address that DMA units can access (dev=DMA-unit, CPUMEM_TO_DMA,
  *  src_address=CPU-RAM-ADR) and to translate an address of a PCI resource for
  *  example RAM mapped into a PCI BAR to an CPU accessible address
- *  (dev=PCI-device, cpu_address=1, upstream=1, src_address=PCI-BAR-ADR).
+ *  (dev=PCI-device, DMAMEM_TO_CPU, src_address=PCI-BAR-ADR).
+ *
+ *  Source address is translated and the result is put into *dst_address, if
+ *  the address is not accessible on the other bus -1 is returned.
  *
  *  \param dev             Device to translate addresses for
- *  \param cpu_addresses   Addresses are inteded for CPU(1) or DMA-Hardware(0)
- *  \param upsteam         Select translation direction (0=towards hardware,
- *                         1=towards CPU) and thereby which bus src_address is
- *                         valid for
+ *  \param options         Tanslation direction options, see enum drvmgr_tr_opts
  *  \param src_address     Address to translate
  *  \param dst_address     Location where translated address is stored
  *
- *  Returns -1 if unable to translate. If no map is present src_address is
- *  translated 1:1 (just copied). If dev is on root-bus no translation is
- *  performed 0 is returned and src_address is stored in *dst_address.
+ *  Returns 0 if unable to translate. The remaining length from the given
+ *  address of the map is returned on success, for example if a map starts
+ *  at 0x40000000 of size 0x100000 the result will be 0x40000 if the address
+ *  was translated into 0x400C0000.
+ *  If dev is on root-bus no translation is performed 0xffffffff is returned
+ *  and src_address is stored in *dst_address.
  */
-extern int drvmgr_translate(
+extern unsigned int drvmgr_translate(
 	struct drvmgr_dev *dev,
-	int cpu_addresses,
-	int upstream,
+	unsigned int options,
 	void *src_address,
 	void **dst_address);
 
@@ -666,16 +708,35 @@ extern int drvmgr_translate(
  * \param src_address  Address to be translated
  * \param dst_address  Translated address is stored here on success (return=0)
  *
- * Returns -1 if failed to translate address between buses. 0 successfully
- * translated, reuslt is in *dst_address
+ *  Returns 0 if unable to translate. The remaining length from the given
+ *  address of the map is returned on success and the result is stored into
+ *  *dst_address. For example if a map starts at 0x40000000 of size 0x100000
+ *  the result will be 0x40000 if the address was translated into 0x400C0000.
+ *  If dev is on root-bus no translation is performed 0xffffffff is returned.
+ *  and src_address is stored in *dst_address.
  */
-extern int drvmgr_translate_bus(
+extern unsigned int drvmgr_translate_bus(
 	struct drvmgr_bus *from,
 	struct drvmgr_bus *to,
 	int reverse,
 	void *src_address,
 	void **dst_address);
 
+/* Calls drvmgr_translate() to translate an address range and checks the result,
+ * a printout is generated if the check fails. All parameters are passed on to
+ * drvmgr_translate() except for size, see paramters of drvmgr_translate().
+ *
+ * If size=0 only the starting address is not checked.
+ *
+ * If mapping failes a non-zero result is returned.
+ */
+extern int drvmgr_translate_check(
+	struct drvmgr_dev *dev,
+	unsigned int options,
+	void *src_address,
+	void **dst_address,
+	unsigned int size);
+
 /*! Get function pointer from Device Driver or Bus Driver.
  *
  *  Returns 0 if function is available
diff --git a/cpukit/libdrvmgr/drvmgr_translate.c b/cpukit/libdrvmgr/drvmgr_translate.c
index 630ba6f007..7f12aa5588 100644
--- a/cpukit/libdrvmgr/drvmgr_translate.c
+++ b/cpukit/libdrvmgr/drvmgr_translate.c
@@ -28,7 +28,7 @@
 #include <drvmgr/drvmgr.h>
 #include "drvmgr_internal.h"
 
-int drvmgr_translate_bus(
+unsigned int drvmgr_translate_bus(
 	struct drvmgr_bus *from,
 	struct drvmgr_bus *to,
 	int reverse,
@@ -36,61 +36,61 @@ int drvmgr_translate_bus(
 	void **dst_address)
 {
 	struct drvmgr_bus *path[16];
-	int upstream, ret, depth, i;
+	int dir, levels, i;
 	void *dst, *from_adr, *to_adr;
 	struct drvmgr_map_entry *map;
 	struct drvmgr_bus *bus;
+	unsigned int sz;
+	struct drvmgr_bus *bus_bot, *bus_top;
 
 	dst = src_address;
-	ret = 0;
+	sz = 0xffffffff;
 
-	if (from == to) /* no need traslating addresses when on same bus */
+	if (from == to) /* no need translating addresses when on same bus */
 		goto out;
 
+	/* Always find translation path from remote bus towards root bus. All
+	 * buses have root bus has parent at some level
+	 */
 	if (from->depth > to->depth) {
-		/* up-streams */
-		upstream = 1;
-		depth = from->depth - to->depth;
-		if (depth >= 16)
-			return -1; /* Does not support such a big depth */
-
-		/* Intensionally we skip the last bus since its bridge is
-		 * not used in this translation
-		 */
-		path[0] = from;
-		for (i=1; i < depth; i++)
-			path[i] = path[i-1]->dev->parent;
+		bus_bot = from;
+		bus_top = to;
+		dir = 0;
 	} else {
-		/* down-streams */
-		upstream = 0;
-		depth = to->depth - from->depth;
-		if (depth >= 16)
-			return -1; /* Does not support such a big depth */
-
-		/* Intensionally we skip the last bus since its bridge is
-		 * not used in this translation
-		 */
-		path[depth-1] = to;
-		for (i=depth-1; i > 0; i--)
-			path[i-1] = path[i]->dev->parent;
+		bus_bot = to;
+		bus_top = from;
+		dir = 1;
 	}
+	levels = bus_bot->depth - bus_top->depth;
+	if (levels >= 16)
+		return 0; /* Does not support such a big depth */
+	i = 0;
+	while ((bus_bot != NULL) && bus_bot != bus_top) {
+		if (dir)
+			path[(levels - 1) - i] = bus_bot;
+		else
+			path[i] = bus_bot;
+		i++;
+		bus_bot = bus_bot->dev->parent;
+	}
+	if (bus_bot == NULL)
+		return 0; /* from -> to is not linearly connected */
 
-	/* Translate address */
-	for (i=0; i < depth && ret == 0; i++) {
+	for (i = 0; i < levels; i++) {
 		bus = path[i];
 
-		if ((upstream && reverse) || (!upstream && !reverse))
-			map = bus->maps_down;
-		else
+		if ((dir && reverse) || (!dir && !reverse))
 			map = bus->maps_up;
+		else
+			map = bus->maps_down;
 
 		if (map == NULL)
 			continue; /* No translation needed - 1:1 mapping */
 
-		ret = -1;
-
-		if (map == DRVMGR_TRANSLATE_NO_BRIDGE)
+		if (map == DRVMGR_TRANSLATE_NO_BRIDGE) {
+			sz = 0;
 			break; /* No bridge interface in this direction */
+		}
 
 		while (map->size != 0) {
 			if (reverse) {
@@ -104,49 +104,44 @@ int drvmgr_translate_bus(
 
 			if ((dst >= from_adr) &&
 			    (dst <= (from_adr + (map->size - 1)))) {
+				if (((from_adr + (map->size - 1)) - dst) < sz)
+					sz = (from_adr + (map->size - 1)) - dst;
 				dst = (dst - from_adr) + to_adr;
-				ret = 0;
 				break;
 			}
 			map++;
 		}
+		/* quit if no matching translation information */
+		if (map->size == 0) {
+			sz = 0;
+			break;
+		}
 	}
 
 out:
 	if (dst_address)
 		*dst_address = dst;
 
-	return ret;
+	return sz;
 }
 
-/* Translate Address, used by drivers when an address need to be
- * converted in order to access a remote address or for a remote
- * hardware to access (DMA) to access CPU local RAM.
- *  - from remote address to CPU local
- *  - from CPU local to remote
- */
-int drvmgr_translate(
+unsigned int drvmgr_translate(
 	struct drvmgr_dev *dev,
-	int cpu_addresses,
-	int upstream,
+	unsigned int options,
 	void *src_address,
 	void **dst_address)
 {
 	struct drvmgr_bus *to, *from;
-	int rev;
+	int rev = 0;
 
-	if (upstream) {
-		from = dev->parent;
-		to = drv_mgr.root_dev.bus;
-	} else {
+	rev = (~options) & 1;
+	if ((options == CPUMEM_TO_DMA) || (options == DMAMEM_FROM_CPU)) {
 		from = drv_mgr.root_dev.bus;
 		to = dev->parent;
+	} else { /* CPUMEM_FROM_DMA || DMAMEM_TO_CPU */
+		from = dev->parent;
+		to = drv_mgr.root_dev.bus;
 	}
 
-	if (cpu_addresses)
-		rev = upstream;
-	else
-		rev = !upstream;
-
 	return drvmgr_translate_bus(from, to, rev, src_address, dst_address);
 }
diff --git a/cpukit/libdrvmgr/drvmgr_translate_check.c b/cpukit/libdrvmgr/drvmgr_translate_check.c
new file mode 100644
index 0000000000..bd9c07177c
--- /dev/null
+++ b/cpukit/libdrvmgr/drvmgr_translate_check.c
@@ -0,0 +1,35 @@
+/*  Driver Manager Driver Translate Interface Implementation
+ *
+ *  COPYRIGHT (c) 2010.
+ *  Aeroflex Gaisler AB
+ *
+ *  The license and distribution terms for this file may be
+ *  found in the file LICENSE in this distribution or at
+ *  http://www.rtems.com/license/LICENSE.
+ */
+
+#include <drvmgr/drvmgr.h>
+
+/* Calls drvmgr_translate() to translate an address range and check the result,
+ * a printout is generated if the check fails. See paramters of
+ * drvmgr_translate().
+ * If size=0 only the starting address is not checked.
+ */
+int drvmgr_translate_check(
+	struct drvmgr_dev *dev,
+	unsigned int options,
+	void *src_address,
+	void **dst_address,
+	unsigned int size)
+{
+	unsigned int max;
+
+	max = drvmgr_translate(dev, options, src_address, dst_address);
+	if (max == 0 || (max < size && (size != 0))) {
+		printk(" ### dev %p (%s) failed mapping %p\n",
+			dev, dev->name ? dev->name : "unnamed", src_address);
+		return -1;
+	}
+
+	return 0;
+}
diff --git a/cpukit/libmisc/shell/main_drvmgr.c b/cpukit/libmisc/shell/main_drvmgr.c
index 1a2563af7f..cfea12de4a 100644
--- a/cpukit/libmisc/shell/main_drvmgr.c
+++ b/cpukit/libmisc/shell/main_drvmgr.c
@@ -279,7 +279,7 @@ int shell_drvmgr_mem(int argc, char *argv[])
 
 int shell_drvmgr_translate(int argc, char *argv[])
 {
-  int rc, cpu, up, obj_type;
+  int rc, rev, up, obj_type;
   void *obj, *dst;
   unsigned long src, tmp;
 
@@ -301,8 +301,8 @@ int shell_drvmgr_translate(int argc, char *argv[])
     puts(" Not a valid option OPT, only [0..3] is valid");
     return 0;
   }
-  cpu = tmp & 1;
-  up = (tmp >> 1) & 1;
+  rev = tmp & DRVMGR_TR_REVERSE;
+  up = tmp & DRVMGR_TR_PATH;
 
   src = strtoul(argv[4], NULL, 0);
   if (src == ULONG_MAX && errno == ERANGE) {
@@ -310,11 +310,13 @@ int shell_drvmgr_translate(int argc, char *argv[])
     return 0;
   }
 
-  rc = drvmgr_translate((struct drvmgr_dev *)obj, cpu, up, (void *)src, &dst);
-  if (rc != 0)
+  rc = drvmgr_translate((struct drvmgr_dev *)obj, up | rev, (void *)src, &dst);
+  if (rc == 0)
     printf(" Address %p could not be translated\n", (void *)src);
+  else if (rc == 0xffffffff)
+    printf(" %p => %p  (no translation required)\n", (void *)src, dst);
   else
-    printf(" %p => %p\n", (void *)src, dst);
+    printf(" %p => %p  (map size 0x%x)\n", (void *)src, dst, rc);
 
   return 0;
 }
@@ -334,8 +336,8 @@ const char drvmgr_usage_str[] =
  "  drvmgr short [ID]    Short info about all devices/buses or one\n"
  "                       device/bus\n"
  "  drvmgr topo          Show bus topology with all devices\n"
- "  drvmgr tr ID OPT ADR Translate hw(0)/cpu(1) (OPT bit0) address ADR\n"
- "                       down(0)/up(1) streams (OPT bit1) for device\n"
+ "  drvmgr tr ID OPT ADR Translate ADR down(0)/up(1) -streams (OPT bit 1) in\n"
+ "                       std(0)/reverse(1) (OPT bit 0) direction for device\n"
  "  drvmgr --help\n";
 
 static void usage(void)