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-rw-r--r--arch/arm/mach-versatile/include/mach/entry-macro.S44
1 files changed, 44 insertions, 0 deletions
diff --git a/arch/arm/mach-versatile/include/mach/entry-macro.S b/arch/arm/mach-versatile/include/mach/entry-macro.S
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+++ b/arch/arm/mach-versatile/include/mach/entry-macro.S
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+/*
+ * arch/arm/mach-versatile/include/mach/entry-macro.S
+ *
+ * Low-level IRQ helper macros for Versatile 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/hardware.h>
+#include <asm/hardware/vic.h>
+
+ .macro disable_fiq
+ .endm
+
+ .macro get_irqnr_preamble, base, tmp
+ ldr \base, =IO_ADDRESS(VERSATILE_VIC_BASE)
+ .endm
+
+ .macro arch_ret_to_user, tmp1, tmp2
+ .endm
+
+ .macro get_irqnr_and_base, irqnr, irqstat, base, tmp
+ ldr \irqstat, [\base, #VIC_IRQ_STATUS] @ get masked status
+ mov \irqnr, #0
+ teq \irqstat, #0
+ beq 1003f
+
+1001: tst \irqstat, #15
+ bne 1002f
+ add \irqnr, \irqnr, #4
+ movs \irqstat, \irqstat, lsr #4
+ bne 1001b
+1002: tst \irqstat, #1
+ bne 1003f
+ add \irqnr, \irqnr, #1
+ movs \irqstat, \irqstat, lsr #1
+ bne 1002b
+1003: /* EQ will be set if no irqs pending */
+
+@ clz \irqnr, \irqstat
+@1003: /* EQ will be set if we reach MAXIRQNUM */
+ .endm
+
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