[ARM] add Marvell Kirkwood (88F6000) SoC support

The Marvell Kirkwood (88F6000) is a family of ARM SoCs based on a
Shiva CPU core, and features a DDR2 controller, a x1 PCIe interface,
a USB 2.0 interface, a SPI controller, a crypto accelerator, a TS
interface, and IDMA/XOR engines, and depending on the model, also
features one or two Gigabit Ethernet interfaces, two SATA II
interfaces, one or two TWSI interfaces, one or two UARTs, a
TDM/SLIC interface, a NAND controller, an I2S/SPDIF interface, and
an SDIO interface.

This patch adds supports for the Marvell DB-88F6281-BP Development
Board and the RD-88F6192-NAS and the RD-88F6281 Reference Designs,
enabling support for the PCIe interface, the USB interface, the
ethernet interfaces, the SATA interfaces, the TWSI interfaces, the
UARTs, and the NAND controller.

Signed-off-by: Saeed Bishara <saeed@marvell.com>
Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>

1 files changed, 40 insertions, 0 deletions

diff --git a/include/asm-arm/arch-kirkwood/entry-macro.S b/include/asm-arm/arch-kirkwood/entry-macro.S
new file mode 100644
index 000000000000..fc6a43d9355c
--- /dev/null
+++ b/include/asm-arm/arch-kirkwood/entry-macro.S
@@ -0,0 +1,40 @@
+/*
+ * include/asm-arm/arch-kirkwood/entry-macro.S
+ *
+ * Low-level IRQ helper macros for Marvell Kirkwood platforms
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2.  This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#include <asm/arch/kirkwood.h>
+
+        .macro  disable_fiq
+        .endm
+
+        .macro  arch_ret_to_user, tmp1, tmp2
+        .endm
+
+        .macro  get_irqnr_preamble, base, tmp
+        ldr     \base, =IRQ_VIRT_BASE
+        .endm
+
+        .macro  get_irqnr_and_base, irqnr, irqstat, base, tmp
+        @ check low interrupts
+        ldr     \irqstat, [\base, #IRQ_CAUSE_LOW_OFF]
+        ldr     \tmp, [\base, #IRQ_MASK_LOW_OFF]
+        mov     \irqnr, #31
+        ands    \irqstat, \irqstat, \tmp
+        bne     1001f
+
+        @ if no low interrupts set, check high interrupts
+        ldr     \irqstat, [\base, #IRQ_CAUSE_HIGH_OFF]
+        ldr     \tmp, [\base, #IRQ_MASK_HIGH_OFF]
+        mov     \irqnr, #63
+        ands    \irqstat, \irqstat, \tmp
+
+        @ find first active interrupt source
+1001:   clzne   \irqstat, \irqstat
+        subne   \irqnr, \irqnr, \irqstat
+        .endm