linux/arch/arm/include
Lorenzo Pieralisi a0ae024050 ARM: kernel: add device tree init map function
When booting through a device tree, the kernel cpu logical id map can be
initialized using device tree data passed by FW or through an embedded blob.

This patch adds a function that parses device tree "cpu" nodes and
retrieves the corresponding CPUs hardware identifiers (MPIDR).
It sets the possible cpus and the cpu logical map values according to
the number of CPUs defined in the device tree and respective properties.

The device tree HW identifiers are considered valid if all CPU nodes contain
a "reg" property, there are no duplicate "reg" entries and the DT defines a
CPU node whose "reg" property matches the MPIDR[23:0] of the boot CPU.

The primary CPU is assigned cpu logical number 0 to keep the current convention
valid.

Current bindings documentation is included in the patch:

Documentation/devicetree/bindings/arm/cpus.txt

Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Nicolas Pitre <nico@linaro.org>
2012-11-19 15:44:33 +00:00
..
asm ARM: kernel: add device tree init map function 2012-11-19 15:44:33 +00:00
debug ARM: socfpga: Fix socfpga compilation with early_printk() enabled 2012-10-25 16:52:53 +02:00
uapi/asm ARM: 7566/1: vfp: fix save and restore when running on pre-VFPv3 and CONFIG_VFPv3 set 2012-10-29 10:04:05 +00:00