diff options
| author | Stephen Boyd <sboyd@codeaurora.org> | 2013-10-30 18:21:09 -0700 |
|---|---|---|
| committer | Kumar Gala <galak@codeaurora.org> | 2014-02-11 15:00:37 -0600 |
| commit | 6c3ff8b11a16ec69199ab85b74a5fae6d9c59db7 (patch) | |
| tree | 79bf0dffed2a312578dd2a75048f6d65d21a6e8d /include/asm-generic | |
| parent | cf1e8f0cd665e2a9966d2bee4e11ecc0938ff166 (diff) | |
ARM: Introduce CPU_METHOD_OF_DECLARE() for cpu hotplug/smp
The goal of multi-platform kernels is to remove the need for mach
directories and machine descriptors. To further that goal,
introduce CPU_METHOD_OF_DECLARE() to allow cpu hotplug/smp
support to be separated from the machine descriptors.
Implementers should specify an enable-method property in their
cpus node and then implement a matching set of smp_ops in their
hotplug/smp code, wiring it up with the CPU_METHOD_OF_DECLARE()
macro. When the kernel is compiled we'll collect all the
enable-method smp_ops into one section for use at boot.
At boot time we'll look for an enable-method in each cpu node and
try to match that against all known CPU enable methods in the
kernel. If there are no enable-methods in the cpu nodes we
fallback to the cpus node and try to use any enable-method found
there. If that doesn't work we fall back to the old way of using
the machine descriptor.
Acked-by: Mark Rutland <mark.rutland@arm.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: <devicetree@vger.kernel.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Kumar Gala <galak@codeaurora.org>
Diffstat (limited to 'include/asm-generic')
| -rw-r--r-- | include/asm-generic/vmlinux.lds.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h index bc2121fa913..bd02ca7a1d5 100644 --- a/include/asm-generic/vmlinux.lds.h +++ b/include/asm-generic/vmlinux.lds.h @@ -167,6 +167,15 @@ #define CLK_OF_TABLES() #endif +#ifdef CONFIG_SMP +#define CPU_METHOD_OF_TABLES() . = ALIGN(8); \ + VMLINUX_SYMBOL(__cpu_method_of_table_begin) = .; \ + *(__cpu_method_of_table) \ + VMLINUX_SYMBOL(__cpu_method_of_table_end) = .; +#else +#define CPU_METHOD_OF_TABLES() +#endif + #define KERNEL_DTB() \ STRUCT_ALIGN(); \ VMLINUX_SYMBOL(__dtb_start) = .; \ @@ -491,6 +500,7 @@ MEM_DISCARD(init.rodata) \ CLK_OF_TABLES() \ CLKSRC_OF_TABLES() \ + CPU_METHOD_OF_TABLES() \ KERNEL_DTB() \ IRQCHIP_OF_MATCH_TABLE() |