ARM: orion: always use MULTI_IRQ_HANDLER

As a preparation for multiplatform support, this enables
the MULTI_IRQ_HANDLER code unconditionally on dove and
orion5x, and introduces the respective code on mv78xx0,
which did not have it so far. The classic entry-macro.S
files are removed as they are now obsolete.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>

2 files changed, 33 insertions, 41 deletions

diff --git a/arch/arm/mach-mv78xx0/include/mach/entry-macro.S b/arch/arm/mach-mv78xx0/include/mach/entry-macro.S
deleted file mode 100644
index 6b1f088e0597..000000000000
--- a/arch/arm/mach-mv78xx0/include/mach/entry-macro.S
+++ /dev/null
@@ -1,41 +0,0 @@
-/*
- * arch/arm/mach-mv78xx0/include/mach/entry-macro.S
- *
- * Low-level IRQ helper macros for Marvell MV78xx0 platforms
- *
- * 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/bridge-regs.h>
-
-	.macro  get_irqnr_preamble, base, tmp
-	ldr	\base, =IRQ_VIRT_BASE
-	.endm
-
-	.macro  get_irqnr_and_base, irqnr, irqstat, base, tmp
-	@ check low interrupts
-	ldr	\irqstat, [\base, #IRQ_CAUSE_LOW_OFF]
-	ldr	\tmp, [\base, #IRQ_MASK_LOW_OFF]
-	mov	\irqnr, #31
-	ands	\irqstat, \irqstat, \tmp
-	bne	1001f
-
-	@ if no low interrupts set, check high interrupts
-	ldr	\irqstat, [\base, #IRQ_CAUSE_HIGH_OFF]
-	ldr	\tmp, [\base, #IRQ_MASK_HIGH_OFF]
-	mov	\irqnr, #63
-	ands	\irqstat, \irqstat, \tmp
-	bne	1001f
-
-	@ if no high interrupts set, check error interrupts
-	ldr	\irqstat, [\base, #IRQ_CAUSE_ERR_OFF]
-	ldr	\tmp, [\base, #IRQ_MASK_ERR_OFF]
-	mov	\irqnr, #95
-	ands	\irqstat, \irqstat, \tmp
-
-	@ find first active interrupt source
-1001:	clzne	\irqstat, \irqstat
-	subne	\irqnr, \irqnr, \irqstat
-	.endm
diff --git a/arch/arm/mach-mv78xx0/irq.c b/arch/arm/mach-mv78xx0/irq.c
index 32073444024b..2453c33faccf 100644
--- a/arch/arm/mach-mv78xx0/irq.c
+++ b/arch/arm/mach-mv78xx0/irq.c
@@ -11,6 +11,7 @@
 #include <linux/kernel.h>
 #include <linux/irq.h>
 #include <linux/io.h>
+#include <asm/exception.h>
 #include <mach/bridge-regs.h>
 #include <plat/orion-gpio.h>
 #include <plat/irq.h>
@@ -23,12 +24,44 @@ static int __initdata gpio0_irqs[4] = {
 	IRQ_MV78XX0_GPIO_24_31,
 };
 
+static void __iomem *mv78xx0_irq_base = IRQ_VIRT_BASE;
+
+static asmlinkage void
+__exception_irq_entry mv78xx0_legacy_handle_irq(struct pt_regs *regs)
+{
+	u32 stat;
+
+	stat = readl_relaxed(mv78xx0_irq_base + IRQ_CAUSE_LOW_OFF);
+	stat &= readl_relaxed(mv78xx0_irq_base + IRQ_MASK_LOW_OFF);
+	if (stat) {
+		unsigned int hwirq = __fls(stat);
+		handle_IRQ(hwirq, regs);
+		return;
+	}
+	stat = readl_relaxed(mv78xx0_irq_base + IRQ_CAUSE_HIGH_OFF);
+	stat &= readl_relaxed(mv78xx0_irq_base + IRQ_MASK_HIGH_OFF);
+	if (stat) {
+		unsigned int hwirq = 32 + __fls(stat);
+		handle_IRQ(hwirq, regs);
+		return;
+	}
+	stat = readl_relaxed(mv78xx0_irq_base + IRQ_CAUSE_ERR_OFF);
+	stat &= readl_relaxed(mv78xx0_irq_base + IRQ_MASK_ERR_OFF);
+	if (stat) {
+		unsigned int hwirq = 64 + __fls(stat);
+		handle_IRQ(hwirq, regs);
+		return;
+	}
+}
+
 void __init mv78xx0_init_irq(void)
 {
 	orion_irq_init(0, IRQ_VIRT_BASE + IRQ_MASK_LOW_OFF);
 	orion_irq_init(32, IRQ_VIRT_BASE + IRQ_MASK_HIGH_OFF);
 	orion_irq_init(64, IRQ_VIRT_BASE + IRQ_MASK_ERR_OFF);
 
+	set_handle_irq(mv78xx0_legacy_handle_irq);
+
 	/*
 	 * Initialize gpiolib for GPIOs 0-31.  (The GPIO interrupt mask
 	 * registers for core #1 are at an offset of 0x18 from those of