omap1: Use asm_irq_flags for entry-macro.S

Initialize asm_irq_flags in omap_init_irq and use it in
get_irqnr_and_base to detect between omap7xx and omap15xx/16xx.

Note that both INT_1510_IH2_IRQ and INT_1510_IH2_IRQ are defined
as 0, so use INT_1510_IH2_IRQ for both of them.
Tested-by: Janusz Krzysztofik <jkrzyszt@tis.icnet.pl>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/mach-omap1/include/mach/entry-macro.S

@@ -14,18 +14,17 @@
 #include <mach/irqs.h>
 #include <asm/hardware/gic.h>
 
-#if (defined(CONFIG_ARCH_OMAP730)||defined(CONFIG_ARCH_OMAP850)) && \
-	(defined(CONFIG_ARCH_OMAP15XX) || defined(CONFIG_ARCH_OMAP16XX))
-#error "FIXME: OMAP7XX doesn't support multiple-OMAP"
-#elif defined(CONFIG_ARCH_OMAP730) || defined(CONFIG_ARCH_OMAP850)
-#define INT_IH2_IRQ		INT_7XX_IH2_IRQ
-#elif defined(CONFIG_ARCH_OMAP15XX)
-#define INT_IH2_IRQ		INT_1510_IH2_IRQ
-#elif defined(CONFIG_ARCH_OMAP16XX)
-#define INT_IH2_IRQ		INT_1610_IH2_IRQ
-#else
-#warning "IH2 IRQ defaulted"
-#define INT_IH2_IRQ		INT_1510_IH2_IRQ
+/*
+ * We use __glue to avoid errors with multiple definitions of
+ * .globl omap_irq_flags as it's included from entry-armv.S but not
+ * from entry-common.S.
+ */
+#ifdef __glue
+		.pushsection .data
+		.globl	omap_irq_flags
+omap_irq_flags:
+		.word	0
+		.popsection
 #endif
 
  		.macro	disable_fiq
@@ -47,9 +46,11 @@
 		beq	1510f
 
 		ldr	\irqnr, [\base, #IRQ_SIR_FIQ_REG_OFFSET]
+		ldr	\tmp, =omap_irq_flags	@ irq flags address
+		ldr	\tmp, [\tmp, #0]	@ irq flags value
 		cmp	\irqnr, #0
 		ldreq	\irqnr, [\base, #IRQ_SIR_IRQ_REG_OFFSET]
-		cmpeq	\irqnr, #INT_IH2_IRQ
+		cmpeq	\irqnr, \tmp
 		ldreq	\base, =OMAP1_IO_ADDRESS(OMAP_IH2_BASE)
 		ldreq	\irqnr, [\base, #IRQ_SIR_IRQ_REG_OFFSET]
 		addeqs	\irqnr, \irqnr, #32

arch/arm/mach-omap1/irq.c

@@ -176,26 +176,31 @@ static struct irq_chip omap_irq_chip = {
 
 void __init omap_init_irq(void)
 {
+	extern unsigned int omap_irq_flags;
 	int i, j;
 
 #if defined(CONFIG_ARCH_OMAP730) || defined(CONFIG_ARCH_OMAP850)
 	if (cpu_is_omap7xx()) {
+		omap_irq_flags = INT_7XX_IH2_IRQ;
 		irq_banks = omap7xx_irq_banks;
 		irq_bank_count = ARRAY_SIZE(omap7xx_irq_banks);
 	}
 #endif
 #ifdef CONFIG_ARCH_OMAP15XX
 	if (cpu_is_omap1510()) {
+		omap_irq_flags = INT_1510_IH2_IRQ;
 		irq_banks = omap1510_irq_banks;
 		irq_bank_count = ARRAY_SIZE(omap1510_irq_banks);
 	}
 	if (cpu_is_omap310()) {
+		omap_irq_flags = INT_1510_IH2_IRQ;
 		irq_banks = omap310_irq_banks;
 		irq_bank_count = ARRAY_SIZE(omap310_irq_banks);
 	}
 #endif
 #if defined(CONFIG_ARCH_OMAP16XX)
 	if (cpu_is_omap16xx()) {
+		omap_irq_flags = INT_1510_IH2_IRQ;
 		irq_banks = omap1610_irq_banks;
 		irq_bank_count = ARRAY_SIZE(omap1610_irq_banks);
 	}

arch/arm/plat-omap/include/plat/irqs.h

@@ -77,7 +77,7 @@
 /*
  * OMAP-1610 specific IRQ numbers for interrupt handler 1
  */
-#define INT_1610_IH2_IRQ	0
+#define INT_1610_IH2_IRQ	INT_1510_IH2_IRQ
 #define INT_1610_IH2_FIQ	2
 #define INT_1610_McBSP2_TX	4
 #define INT_1610_McBSP2_RX	5