[ARM] 4818/1: RealView: Add core-tile detection

This patch adds the core-tile detection and only enables devices if the
corresponding tile is present. It currently detects the ARM11MPCore via
the core_tile_eb11mp() macro.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/mach-realview/platsmp.c

@@ -18,6 +18,7 @@
 #include <asm/hardware/arm_scu.h>
 #include <asm/hardware.h>
 #include <asm/io.h>
+#include <asm/mach-types.h>
 
 extern void realview_secondary_startup(void);
 
@@ -31,9 +32,13 @@ static unsigned int __init get_core_count(void)
 {
 	unsigned int ncores;
 
-	ncores = __raw_readl(__io_address(REALVIEW_EB11MP_SCU_BASE) + SCU_CONFIG);
+	if (machine_is_realview_eb() && core_tile_eb11mp()) {
+		ncores = __raw_readl(__io_address(REALVIEW_EB11MP_SCU_BASE) + SCU_CONFIG);
+		ncores = (ncores & 0x03) + 1;
+	} else
+		ncores = 1;
 
-	return (ncores & 0x03) + 1;
+	return ncores;
 }
 
 static DEFINE_SPINLOCK(boot_lock);
@@ -193,7 +198,8 @@ void __init smp_prepare_cpus(unsigned int max_cpus)
 	 * dummy (!CONFIG_LOCAL_TIMERS), it was already registers in
 	 * realview_timer_init
 	 */
-	local_timer_setup(cpu);
+	if (machine_is_realview_eb() && core_tile_eb11mp())
+		local_timer_setup(cpu);
 #endif
 
 	/*

arch/arm/mach-realview/realview_eb.c

@@ -59,26 +59,7 @@ static struct map_desc realview_eb_io_desc[] __initdata = {
 		.pfn		= __phys_to_pfn(REALVIEW_GIC_DIST_BASE),
 		.length		= SZ_4K,
 		.type		= MT_DEVICE,
-	},
-#ifdef CONFIG_REALVIEW_MPCORE
-	{
-		.virtual	= IO_ADDRESS(REALVIEW_GIC1_CPU_BASE),
-		.pfn		= __phys_to_pfn(REALVIEW_GIC1_CPU_BASE),
-		.length		= SZ_4K,
-		.type		= MT_DEVICE,
 	}, {
-		.virtual	= IO_ADDRESS(REALVIEW_GIC1_DIST_BASE),
-		.pfn		= __phys_to_pfn(REALVIEW_GIC1_DIST_BASE),
-		.length		= SZ_4K,
-		.type		= MT_DEVICE,
-	}, {
-		.virtual	= IO_ADDRESS(REALVIEW_MPCORE_L220_BASE),
-		.pfn		= __phys_to_pfn(REALVIEW_MPCORE_L220_BASE),
-		.length		= SZ_8K,
-		.type		= MT_DEVICE,
-	},
-#endif
-	{
 		.virtual	= IO_ADDRESS(REALVIEW_SCTL_BASE),
 		.pfn		= __phys_to_pfn(REALVIEW_SCTL_BASE),
 		.length		= SZ_4K,
@@ -104,9 +85,30 @@ static struct map_desc realview_eb_io_desc[] __initdata = {
 #endif
 };
 
+static struct map_desc realview_eb11mp_io_desc[] __initdata = {
+	{
+		.virtual	= IO_ADDRESS(REALVIEW_EB11MP_GIC_CPU_BASE),
+		.pfn		= __phys_to_pfn(REALVIEW_EB11MP_GIC_CPU_BASE),
+		.length		= SZ_4K,
+		.type		= MT_DEVICE,
+	}, {
+		.virtual	= IO_ADDRESS(REALVIEW_EB11MP_GIC_DIST_BASE),
+		.pfn		= __phys_to_pfn(REALVIEW_EB11MP_GIC_DIST_BASE),
+		.length		= SZ_4K,
+		.type		= MT_DEVICE,
+	}, {
+		.virtual	= IO_ADDRESS(REALVIEW_EB11MP_L220_BASE),
+		.pfn		= __phys_to_pfn(REALVIEW_EB11MP_L220_BASE),
+		.length		= SZ_8K,
+		.type		= MT_DEVICE,
+	}
+};
+
 static void __init realview_eb_map_io(void)
 {
 	iotable_init(realview_eb_io_desc, ARRAY_SIZE(realview_eb_io_desc));
+	if (core_tile_eb11mp())
+		iotable_init(realview_eb11mp_io_desc, ARRAY_SIZE(realview_eb11mp_io_desc));
 }
 
 /*
@@ -243,24 +245,33 @@ static struct platform_device realview_eb_smc91x_device = {
 
 static void __init gic_init_irq(void)
 {
-#ifdef CONFIG_REALVIEW_MPCORE
-	unsigned int pldctrl;
-	writel(0x0000a05f, __io_address(REALVIEW_SYS_LOCK));
-	pldctrl = readl(__io_address(REALVIEW_SYS_BASE)	+ REALVIEW_MPCORE_SYS_PLD_CTRL1);
-	pldctrl |= 0x00800000;	/* New irq mode */
-	writel(pldctrl, __io_address(REALVIEW_SYS_BASE) + REALVIEW_MPCORE_SYS_PLD_CTRL1);
-	writel(0x00000000, __io_address(REALVIEW_SYS_LOCK));
-#endif
-	gic_dist_init(0, __io_address(REALVIEW_GIC_DIST_BASE), 29);
-	gic_cpu_init(0, __io_address(REALVIEW_GIC_CPU_BASE));
-#if defined(CONFIG_REALVIEW_MPCORE) && !defined(CONFIG_REALVIEW_MPCORE_REVB)
-	gic_dist_init(1, __io_address(REALVIEW_GIC1_DIST_BASE), 64);
-	gic_cpu_init(1, __io_address(REALVIEW_GIC1_CPU_BASE));
-	gic_cascade_irq(1, IRQ_EB_IRQ1);
+	if (core_tile_eb11mp()) {
+		unsigned int pldctrl;
+
+		/* new irq mode */
+		writel(0x0000a05f, __io_address(REALVIEW_SYS_LOCK));
+		pldctrl = readl(__io_address(REALVIEW_SYS_BASE)	+ REALVIEW_EB11MP_SYS_PLD_CTRL1);
+		pldctrl |= 0x00800000;
+		writel(pldctrl, __io_address(REALVIEW_SYS_BASE) + REALVIEW_EB11MP_SYS_PLD_CTRL1);
+		writel(0x00000000, __io_address(REALVIEW_SYS_LOCK));
+
+		/* core tile GIC, primary */
+		gic_dist_init(0, __io_address(REALVIEW_EB11MP_GIC_DIST_BASE), 29);
+		gic_cpu_init(0, __io_address(REALVIEW_EB11MP_GIC_CPU_BASE));
+
+#ifndef CONFIG_REALVIEW_MPCORE_REVB
+		/* board GIC, secondary */
+		gic_dist_init(1, __io_address(REALVIEW_GIC_DIST_BASE), 64);
+		gic_cpu_init(1, __io_address(REALVIEW_GIC_CPU_BASE));
+		gic_cascade_irq(1, IRQ_EB11MP_EB_IRQ1);
 #endif
+	} else {
+		/* board GIC, primary */
+		gic_dist_init(0, __io_address(REALVIEW_GIC_DIST_BASE), 29);
+		gic_cpu_init(0, __io_address(REALVIEW_GIC_CPU_BASE));
+	}
 }
 
-#ifdef CONFIG_REALVIEW_MPCORE
 /*
  * Fix up the IRQ numbers for the RealView EB/ARM11MPCore tile
  */
@@ -290,19 +301,19 @@ static void realview_eb11mp_fixup(void)
 	realview_eb_smc91x_resources[1].start	= IRQ_EB11MP_ETH;
 	realview_eb_smc91x_resources[1].end	= IRQ_EB11MP_ETH;
 }
-#endif
 
 static void __init realview_eb_init(void)
 {
 	int i;
 
-#ifdef CONFIG_REALVIEW_MPCORE
-	realview_eb11mp_fixup();
+	if (core_tile_eb11mp()) {
+		realview_eb11mp_fixup();
+
+		/* 1MB (128KB/way), 8-way associativity, evmon/parity/share enabled
+		 * Bits:  .... ...0 0111 1001 0000 .... .... .... */
+		l2x0_init(__io_address(REALVIEW_EB11MP_L220_BASE), 0x00790000, 0xfe000fff);
+	}
 
-	/* 1MB (128KB/way), 8-way associativity, evmon/parity/share enabled
-	 * Bits:  .... ...0 0111 1001 0000 .... .... .... */
-	l2x0_init(__io_address(REALVIEW_MPCORE_L220_BASE), 0x00790000, 0xfe000fff);
-#endif
 	clk_register(&realview_clcd_clk);
 
 	platform_device_register(&realview_flash_device);

include/asm-arm/arch-realview/board-eb.h

@@ -149,4 +149,23 @@
 #define MAX_GIC_NR		NR_GIC_EB11MP
 #endif
 
+/*
+ * Core tile identification (REALVIEW_SYS_PROCID)
+ */
+#define REALVIEW_EB_PROC_MASK		0xFF000000
+#define REALVIEW_EB_PROC_ARM7TDMI	0x00000000
+#define REALVIEW_EB_PROC_ARM9		0x02000000
+#define REALVIEW_EB_PROC_ARM11		0x04000000
+#define REALVIEW_EB_PROC_ARM11MP	0x06000000
+
+#define check_eb_proc(proc_type)						\
+	((readl(__io_address(REALVIEW_SYS_PROCID)) & REALVIEW_EB_PROC_MASK)	\
+	 == proc_type)
+
+#ifdef CONFIG_REALVIEW_MPCORE
+#define core_tile_eb11mp()	check_eb_proc(REALVIEW_EB_PROC_ARM11MP)
+#else
+#define core_tile_eb11mp()	0
+#endif
+
 #endif	/* __ASM_ARCH_BOARD_EB_H */