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Commit c4d8c80f authored by Magnus Damm's avatar Magnus Damm Committed by Russell King
Browse files

ARM: 6477/1: Use shared GIC entry macros on Realview 



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

Signed-off-by: default avatarMagnus Damm <damm@opensource.se>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent 960351fb

arch/arm/mach-realview/include/mach/entry-macro.S

+1 −59
Original line number Diff line number Diff line
@@ -8,7 +8,7 @@ 
 * warranty of any kind, whether express or implied.

 */

#include <mach/hardware.h>

#include <asm/hardware/gic.h>

#include <asm/hardware/entry-macro-gic.S>



		.macro	disable_fiq

		.endm
@@ -21,61 +21,3 @@ 
		.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



		ldr     \irqstat, [\base, #GIC_CPU_INTACK] /* bits 12-10 = src CPU, 9-0 = int # */



		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