ARM: 6771/1: vexpress: add support for multiple core tiles

The current Versatile Express BSP defines the MACHINE_START macro
in the core tile code.

This patch moves this into the generic board code and introduces a
method for determining the current tile at runtime, allowing the
Kernel to have support for multiple tiles compiled in. Tile-specific
functions are executed via a descriptor struct containing the correct
implementations for the current tile.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 22 insertions, 0 deletions

diff --git a/arch/arm/mach-vexpress/include/mach/motherboard.h b/arch/arm/mach-vexpress/include/mach/motherboard.h
index 98a8ded055bf..0a3a37518405 100644
--- a/arch/arm/mach-vexpress/include/mach/motherboard.h
+++ b/arch/arm/mach-vexpress/include/mach/motherboard.h
@@ -118,4 +118,26 @@
 int v2m_cfg_write(u32 devfn, u32 data);
 int v2m_cfg_read(u32 devfn, u32 *data);
 
+/*
+ * Core tile IDs
+ */
+#define V2M_CT_ID_CA9           0x0c000191
+#define V2M_CT_ID_UNSUPPORTED   0xff000191
+#define V2M_CT_ID_MASK          0xff000fff
+
+struct ct_desc {
+        u32                     id;
+        const char              *name;
+        void                    (*map_io)(void);
+        void                    (*init_early)(void);
+        void                    (*init_irq)(void);
+        void                    (*init_tile)(void);
+#ifdef CONFIG_SMP
+        void                    (*init_cpu_map)(void);
+        void                    (*smp_enable)(unsigned int);
+#endif
+};
+
+extern struct ct_desc *ct_desc;
+
 #endif