[ARM] 3062/1: map in various enp2611 peripherals for the ixp2000 netdev driver

Patch from Lennert Buytenhek

The enp2611 version of the ixp2000 netdev driver needs to be able to
access a number of on-board peripherals.  ioremap() is not suitable
for this, as that will cause XCB=000 mappings to be done, which will
make the cpu susceptible to crashing on ixp2400 erratum #66.  Properly
aligned iotable mappings with MT_IXP2000_DEVICE will cause section
mappings with XCB=101 to be done, which is safe.

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

1 files changed, 30 insertions, 1 deletions

diff --git a/arch/arm/mach-ixp2000/enp2611.c b/arch/arm/mach-ixp2000/enp2611.c
index 9aa54de44740..b91fe7c80fac 100644
--- a/arch/arm/mach-ixp2000/enp2611.c
+++ b/arch/arm/mach-ixp2000/enp2611.c
@@ -64,6 +64,35 @@ static struct sys_timer enp2611_timer = {
 
 
 /*************************************************************************
+ * ENP-2611 I/O
+ *************************************************************************/
+static struct map_desc enp2611_io_desc[] __initdata = {
+        {
+                .virtual        = ENP2611_CALEB_VIRT_BASE,
+                .physical       = ENP2611_CALEB_PHYS_BASE,
+                .length         = ENP2611_CALEB_SIZE,
+                .type           = MT_IXP2000_DEVICE
+        }, {
+                .virtual        = ENP2611_PM3386_0_VIRT_BASE,
+                .physical       = ENP2611_PM3386_0_PHYS_BASE,
+                .length         = ENP2611_PM3386_0_SIZE,
+                .type           = MT_IXP2000_DEVICE
+        }, {
+                .virtual        = ENP2611_PM3386_1_VIRT_BASE,
+                .physical       = ENP2611_PM3386_1_PHYS_BASE,
+                .length         = ENP2611_PM3386_1_SIZE,
+                .type           = MT_IXP2000_DEVICE
+        }
+};
+
+void __init enp2611_map_io(void)
+{
+        ixp2000_map_io();
+        iotable_init(enp2611_io_desc, ARRAY_SIZE(enp2611_io_desc));
+}
+
+
+/*************************************************************************
  * ENP-2611 PCI
  *************************************************************************/
 static int enp2611_pci_setup(int nr, struct pci_sys_data *sys)
@@ -229,7 +258,7 @@ MACHINE_START(ENP2611, "Radisys ENP-2611 PCI network processor board")
         .phys_io        = IXP2000_UART_PHYS_BASE,
         .io_pg_offst    = ((IXP2000_UART_VIRT_BASE) >> 18) & 0xfffc,
         .boot_params    = 0x00000100,
-        .map_io         = ixp2000_map_io,
+        .map_io         = enp2611_map_io,
         .init_irq       = ixp2000_init_irq,
         .timer          = &enp2611_timer,
         .init_machine   = enp2611_init_machine,