Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / arm / mach-dove / include / mach / entry-macro.S

diff --git a/kernel/arch/arm/mach-dove/include/mach/entry-macro.S b/kernel/arch/arm/mach-dove/include/mach/entry-macro.S
new file mode 100644 (file)
index 0000000..72d622b
--- /dev/null
+++ b/kernel/arch/arm/mach-dove/include/mach/entry-macro.S
@@ -0,0 +1,33 @@
+/*
+ * arch/arm/mach-dove/include/mach/entry-macro.S
+ *
+ * Low-level IRQ helper macros for Marvell Dove 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 <mach/bridge-regs.h>
+
+       .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
+
+       @ if no low interrupts set, check high interrupts
+       ldreq   \irqstat, [\base, #IRQ_CAUSE_HIGH_OFF]
+       ldreq   \tmp, [\base, #IRQ_MASK_HIGH_OFF]
+       moveq   \irqnr, #63
+       andeqs  \irqstat, \irqstat, \tmp
+
+       @ find first active interrupt source
+       clzne   \irqstat, \irqstat
+       subne   \irqnr, \irqnr, \irqstat
+       .endm