From: Russell King <rmk@dyn-67.arm.linux.org.uk>
Date: Sat, 21 May 2005 17:16:44 +0000 (+0100)
Subject: [PATCH] ARM SMP: add IPI support
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=791be9b976ba621b21745c30a7fca225fada9110;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

[PATCH] ARM SMP: add IPI support

Add support for inter-processor interrupts to the main IRQ
handling code.

Signed-off-by: Russell King <rmk@arm.linux.org.uk>
---

diff --git a/arch/arm/kernel/entry-armv.S b/arch/arm/kernel/entry-armv.S
index 8ff82bc75eb1..a99e686c0b83 100644
--- a/arch/arm/kernel/entry-armv.S
+++ b/arch/arm/kernel/entry-armv.S
@@ -34,6 +34,20 @@
 	@
 	adrne	lr, 1b
 	bne	asm_do_IRQ
+
+#ifdef CONFIG_SMP
+	/*
+	 * XXX
+	 *
+	 * this macro assumes that irqstat (r6) and base (r5) are
+	 * preserved from get_irqnr_and_base above
+	 */
+	test_for_ipi r0, r6, r5, lr
+	movne	r0, sp
+	adrne	lr, 1b
+	bne	do_IPI
+#endif
+
 	.endm
 
 /*