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-rw-r--r--arch/arm/plat-omap/include/mach/entry-macro.S83
1 files changed, 78 insertions, 5 deletions
diff --git a/arch/arm/plat-omap/include/mach/entry-macro.S b/arch/arm/plat-omap/include/mach/entry-macro.S
index 2276f89671d8..56426ed45ef4 100644
--- a/arch/arm/plat-omap/include/mach/entry-macro.S
+++ b/arch/arm/plat-omap/include/mach/entry-macro.S
@@ -3,6 +3,9 @@
*
* Low-level IRQ helper macros for OMAP-based platforms
*
+ * Copyright (C) 2009 Texas Instruments
+ * Added OMAP4 support - Santosh Shilimkar <santosh.shilimkar@ti.com>
+ *
* 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.
@@ -10,6 +13,7 @@
#include <mach/hardware.h>
#include <mach/io.h>
#include <mach/irqs.h>
+#include <asm/hardware/gic.h>
#if defined(CONFIG_ARCH_OMAP1)
@@ -56,15 +60,21 @@
.endm
#endif
-#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
+#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) || \
+ defined(CONFIG_ARCH_OMAP4)
-#if defined(CONFIG_ARCH_OMAP24XX)
#include <mach/omap24xx.h>
-#endif
-#if defined(CONFIG_ARCH_OMAP34XX)
#include <mach/omap34xx.h>
-#endif
+/* REVISIT: This should be set dynamically if CONFIG_MULTI_OMAP2 is selected */
+#if defined(CONFIG_ARCH_OMAP2420) || defined(CONFIG_ARCH_OMAP2430)
+#define OMAP2_VA_IC_BASE IO_ADDRESS(OMAP24XX_IC_BASE)
+#elif defined(CONFIG_ARCH_OMAP34XX)
+#define OMAP2_VA_IC_BASE IO_ADDRESS(OMAP34XX_IC_BASE)
+#endif
+#if defined(CONFIG_ARCH_OMAP4)
+#include <mach/omap44xx.h>
+#endif
#define INTCPS_SIR_IRQ_OFFSET 0x0040 /* Active interrupt offset */
#define ACTIVEIRQ_MASK 0x7f /* Active interrupt bits */
@@ -77,6 +87,7 @@
.macro arch_ret_to_user, tmp1, tmp2
.endm
+#ifndef CONFIG_ARCH_OMAP4
.macro get_irqnr_and_base, irqnr, irqstat, base, tmp
ldr \base, =OMAP2_VA_IC_BASE
ldr \irqnr, [\base, #0x98] /* IRQ pending reg 1 */
@@ -92,6 +103,68 @@
and \irqnr, \irqnr, #ACTIVEIRQ_MASK /* Clear spurious bits */
.endm
+#else
+ /*
+ * The interrupt numbering scheme is defined in the
+ * interrupt controller spec. To wit:
+ *
+ * Interrupts 0-15 are IPI
+ * 16-28 are reserved
+ * 29-31 are local. We allow 30 to be used for the watchdog.
+ * 32-1020 are global
+ * 1021-1022 are reserved
+ * 1023 is "spurious" (no interrupt)
+ *
+ * For now, we ignore all local interrupts so only return an
+ * interrupt if it's between 30 and 1020. The test_for_ipi
+ * routine below will pick up on IPIs.
+ * A simple read from the controller will tell us the number
+ * of the highest priority enabled interrupt.
+ * We then just need to check whether it is in the
+ * valid range for an IRQ (30-1020 inclusive).
+ */
+ .macro get_irqnr_and_base, irqnr, irqstat, base, tmp
+ ldr \base, =OMAP44XX_VA_GIC_CPU_BASE
+ ldr \irqstat, [\base, #GIC_CPU_INTACK]
+
+ ldr \tmp, =1021
+
+ bic \irqnr, \irqstat, #0x1c00
+
+ cmp \irqnr, #29
+ cmpcc \irqnr, \irqnr
+ cmpne \irqnr, \tmp
+ cmpcs \irqnr, \irqnr
+ .endm
+
+ /* We assume that irqstat (the raw value of the IRQ acknowledge
+ * register) is preserved from the macro above.
+ * If there is an IPI, we immediately signal end of interrupt
+ * on the controller, since this requires the original irqstat
+ * value which we won't easily be able to recreate later.
+ */
+
+ .macro test_for_ipi, irqnr, irqstat, base, tmp
+ bic \irqnr, \irqstat, #0x1c00
+ cmp \irqnr, #16
+ it cc
+ strcc \irqstat, [\base, #GIC_CPU_EOI]
+ it cs
+ cmpcs \irqnr, \irqnr
+ .endm
+
+ /* As above, this assumes that irqstat and base are preserved */
+
+ .macro test_for_ltirq, irqnr, irqstat, base, tmp
+ bic \irqnr, \irqstat, #0x1c00
+ mov \tmp, #0
+ cmp \irqnr, #29
+ itt eq
+ moveq \tmp, #1
+ streq \irqstat, [\base, #GIC_CPU_EOI]
+ cmp \tmp, #0
+ .endm
+#endif
.macro irq_prio_table
.endm