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authorLinus Torvalds <torvalds@linux-foundation.org>2009-12-08 08:15:29 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2009-12-08 08:15:29 -0800
commit1c496784a0d317535f846ddb2c93a08ba936266b (patch)
tree6d0225860032f263b6d95a3e55c364a1a5f55ec1 /arch/arm/mach-omap2/include/mach/entry-macro.S
parentadf9904dc774f23f04a5425f0198483ea61f878b (diff)
parent9a01609e1885b827b979d6d9dd86f43208a9e5fc (diff)
Merge branch 'omap-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6
* 'omap-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6: (149 commits) arm: omap: Add omap3_defconfig AM35xx: Defconfig for AM3517 EVM board AM35xx: Add support for AM3517 EVM board omap: 3630sdp: defconfig creation omap: 3630sdp: introduce 3630 sdp board support omap3: Add defconfig for IGEP v2 board omap3: Add minimal IGEP v2 support omap3: Add CompuLab CM-T35 defconfig omap3: Add CompuLab CM-T35 board support omap3: rx51: Add wl1251 wlan driver support omap3: rx51: Add SDRAM init omap1: Add default kernel configuration for Herald omap1: Add board support and LCD for HTC Herald omap: zoom2: update defconfig for LL_DEBUG_NONE omap: zoom3: defconfig creation omap3: zoom: Introduce zoom3 board support omap3: zoom: Drop i2c-1 speed to 2400 omap3: zoom: rename zoom2 name to generic zoom omap3: zoom: split board file for software reuse omap3evm: MIgrate to smsc911x ethernet driver ... Fix trivial conflict (two unrelated config options added next to each other) in arch/arm/mach-omap2/Makefile
Diffstat (limited to 'arch/arm/mach-omap2/include/mach/entry-macro.S')
-rw-r--r--arch/arm/mach-omap2/include/mach/entry-macro.S124
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diff --git a/arch/arm/mach-omap2/include/mach/entry-macro.S b/arch/arm/mach-omap2/include/mach/entry-macro.S
new file mode 100644
index 00000000000..c7f1720bf28
--- /dev/null
+++ b/arch/arm/mach-omap2/include/mach/entry-macro.S
@@ -0,0 +1,124 @@
+/*
+ * arch/arm/plat-omap/include/mach/entry-macro.S
+ *
+ * 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.
+ */
+#include <mach/hardware.h>
+#include <mach/io.h>
+#include <mach/irqs.h>
+#include <asm/hardware/gic.h>
+
+#include <plat/omap24xx.h>
+#include <plat/omap34xx.h>
+
+/* 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 OMAP2_L4_IO_ADDRESS(OMAP24XX_IC_BASE)
+#elif defined(CONFIG_ARCH_OMAP34XX)
+#define OMAP2_VA_IC_BASE OMAP2_L4_IO_ADDRESS(OMAP34XX_IC_BASE)
+#endif
+#if defined(CONFIG_ARCH_OMAP4)
+#include <plat/omap44xx.h>
+#endif
+#define INTCPS_SIR_IRQ_OFFSET 0x0040 /* Active interrupt offset */
+#define ACTIVEIRQ_MASK 0x7f /* Active interrupt bits */
+
+ .macro disable_fiq
+ .endm
+
+ .macro get_irqnr_preamble, base, tmp
+ .endm
+
+ .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 */
+ cmp \irqnr, #0x0
+ bne 2222f
+ ldr \irqnr, [\base, #0xb8] /* IRQ pending reg 2 */
+ cmp \irqnr, #0x0
+ bne 2222f
+ ldr \irqnr, [\base, #0xd8] /* IRQ pending reg 3 */
+ cmp \irqnr, #0x0
+2222:
+ ldrne \irqnr, [\base, #INTCPS_SIR_IRQ_OFFSET]
+ and \irqnr, \irqnr, #ACTIVEIRQ_MASK /* Clear spurious bits */
+
+ .endm
+#else
+#define OMAP44XX_VA_GIC_CPU_BASE OMAP2_L4_IO_ADDRESS(OMAP44XX_GIC_CPU_BASE)
+
+ /*
+ * 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