linux-kernel - [PATCH 04/07] ARM: Use shared GIC entry macros on Tegra

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Date:	Fri, 12 Nov 2010 17:21:41 +0900
From:	Magnus Damm <magnus.damm@...il.com>
To:	linux@....linux.org.uk
Cc:	kgene.kim@...sung.com, kmpark@...radead.org, konkers@...roid.com,
	tony@...mide.com, adharmap@...eaurora.org, avorontsov@...sta.com,
	linux-kernel@...r.kernel.org, srinidhikasagar@...il.com,
	dwalker@...eaurora.org, santosh.shilimkar@...com,
	ccross@...roid.com, olof@...om.net,
	Magnus Damm <magnus.damm@...il.com>,
	linux-arm-kernel@...ts.infradead.org
Subject: [PATCH 04/07] ARM: Use shared GIC entry macros on Tegra

From: Magnus Damm <damm@...nsource.se>

Use the GIC demux code in asm/hardware/entry-macro-gic.S
on the Tegra subarchitecture.

Signed-off-by: Magnus Damm <damm@...nsource.se>
---

 arch/arm/mach-tegra/include/mach/entry-macro.S |   64 ------------------------
 1 file changed, 1 insertion(+), 63 deletions(-)

--- 0001/arch/arm/mach-tegra/include/mach/entry-macro.S
+++ work/arch/arm/mach-tegra/include/mach/entry-macro.S	2010-11-12 16:01:47.000000000 +0900
@@ -17,7 +17,7 @@
 
 #if defined(CONFIG_ARM_GIC)
 
-#include <asm/hardware/gic.h>
+#include <asm/hardware/entry-macro-gic.S>
 
 	/* Uses the GIC interrupt controller built into the cpu */
 #define ICTRL_BASE (IO_CPU_VIRT + 0x100)
@@ -32,68 +32,6 @@
 
 	.macro  arch_ret_to_user, tmp1, tmp2
 	.endm
-
-	/*
-	 * 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
-
-	/* bits 12-10 = src CPU, 9-0 = int # */
-	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
-	strcc	\irqstat, [\base, #GIC_CPU_EOI]
-	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
-	moveq	\tmp, #1
-	streq	\irqstat, [\base, #GIC_CPU_EOI]
-	cmp	\tmp, #0
-	.endm
-
 #else
 	/* legacy interrupt controller for AP16 */
 	.macro	disable_fiq
--
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