[ARM] 3257/1: ixp2000: map in scratch and sram

Patch from Lennert Buytenhek

For the ixp2000 netdev driver, we need to map in a chunk of SRAM (to
store the transmit and receive descriptors) and the scratch get/put
area (so that we can use the scratchpad rings in the cpu for managing
the descriptors.)  These are the final two mappings needed for the
netdev driver and the last missing piece for the driver in mainline
to work.

Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/mach-ixp2000/core.c

@@ -105,6 +105,16 @@ static struct map_desc ixp2000_io_desc[] __initdata = {
 		.pfn		= __phys_to_pfn(IXP2000_MSF_PHYS_BASE),
 		.length		= IXP2000_MSF_SIZE,
 		.type		= MT_IXP2000_DEVICE,
+	}, {
+		.virtual	= IXP2000_SCRATCH_RING_VIRT_BASE,
+		.pfn		= __phys_to_pfn(IXP2000_SCRATCH_RING_PHYS_BASE),
+		.length		= IXP2000_SCRATCH_RING_SIZE,
+		.type		= MT_IXP2000_DEVICE,
+	}, {
+		.virtual	= IXP2000_SRAM0_VIRT_BASE,
+		.pfn		= __phys_to_pfn(IXP2000_SRAM0_PHYS_BASE),
+		.length		= IXP2000_SRAM0_SIZE,
+		.type		= MT_IXP2000_DEVICE,
 	}, {
 		.virtual	= IXP2000_PCI_IO_VIRT_BASE,
 		.pfn		= __phys_to_pfn(IXP2000_PCI_IO_PHYS_BASE),

include/asm-arm/arch-ixp2000/ixp2000-regs.h

@@ -26,6 +26,8 @@
  * fc000000	da000000	16M		PCI CFG0
  * fd000000	d8000000	16M		PCI I/O
  * fe[0-7]00000			8M		per-platform mappings
+ * fe900000	80000000	1M		SRAM #0 (first MB)
+ * fea00000	cb400000	1M		SCRATCH ring get/put
  * feb00000	c8000000	1M		MSF
  * fec00000	df000000	1M		PCI CSRs
  * fed00000	de000000	1M		PCI CREG
@@ -91,6 +93,14 @@
 #define IXP2000_MSF_VIRT_BASE		0xfeb00000
 #define IXP2000_MSF_SIZE		0x00100000
 
+#define IXP2000_SCRATCH_RING_PHYS_BASE	0xcb400000
+#define IXP2000_SCRATCH_RING_VIRT_BASE	0xfea00000
+#define IXP2000_SCRATCH_RING_SIZE	0x00100000
+
+#define IXP2000_SRAM0_PHYS_BASE		0x80000000
+#define IXP2000_SRAM0_VIRT_BASE		0xfe900000
+#define IXP2000_SRAM0_SIZE		0x00100000
+
 #define IXP2000_PCI_IO_PHYS_BASE	0xd8000000
 #define	IXP2000_PCI_IO_VIRT_BASE	0xfd000000
 #define IXP2000_PCI_IO_SIZE     	0x01000000