[PATCH] ARM SMP: Add support for startup of secondary processors
Create a temporary page table to startup secondary processors. This
page table must have a 1:1 virtual/physical mapping for the kernel
in addition to the standard mappings to ensure that the secondary
CPU can enable its MMU safely.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/include/asm-arm/smp.h b/include/asm-arm/smp.h
index f21fd8f..bd44f89 100644
--- a/include/asm-arm/smp.h
+++ b/include/asm-arm/smp.h
@@ -55,4 +55,18 @@
*/
extern int boot_secondary(unsigned int cpu, struct task_struct *);
+/*
+ * Perform platform specific initialisation of the specified CPU.
+ */
+extern void platform_secondary_init(unsigned int cpu);
+
+/*
+ * Initial data for bringing up a secondary CPU.
+ */
+struct secondary_data {
+ unsigned long pgdir;
+ void *stack;
+};
+extern struct secondary_data secondary_data;
+
#endif /* ifndef __ASM_ARM_SMP_H */