[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>

3 files changed, 80 insertions, 44 deletions

diff --git a/arch/arm/mach-realview/platsmp.c b/arch/arm/mach-realview/platsmp.c
index 0186c80c9040..de2b7159557d 100644
--- a/arch/arm/mach-realview/platsmp.c
+++ b/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
 
         /*
diff --git a/arch/arm/mach-realview/realview_eb.c b/arch/arm/mach-realview/realview_eb.c
index afcf27ceac57..e42ac56e4db5 100644
--- a/arch/arm/mach-realview/realview_eb.c
+++ b/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);
diff --git a/include/asm-arm/arch-realview/board-eb.h b/include/asm-arm/arch-realview/board-eb.h
index 943efc5de4eb..9e76b236b529 100644
--- a/include/asm-arm/arch-realview/board-eb.h
+++ b/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 */