linux-stable.git/arch/xtensa/kernel/setup.c, branch v3.15.2

xtensa: handle memmap kernel option

2014-04-01T21:35:54+00:00

This option is useful for reserving memory regions for secondary cores
in AMP configurations.

Implement the following memmap variants:
- memmap=nn[KMG]@ss[KMG]: force usage of a specific region of memory;
- memmap=nn[KMG]$ss[KMG]: mark specified memory as reserved;
- memmap=nn[KMG]: set end of memory.

Signed-off-by: Max Filippov

xtensa: keep sysmem banks ordered in mem_reserve

2014-04-01T21:35:53+00:00

Rewrite mem_reserve so that it keeps bank order.
Also make its return code more traditional.

Signed-off-by: Max Filippov

xtensa: split bootparam and kernel meminfo

2014-04-01T21:35:51+00:00

Bootparam meminfo is a bootloader ABI, kernel meminfo is for the kernel
bookkeeping, keep them separate. Kernel doesn't care of memory region
types, so drop the type field and don't pass it to add_sysmem_bank.
Move kernel sysmem structures and prototypes to asm/sysmem.h and sysmem
variable and add_sysmem_bank to mm/init.c

Signed-off-by: Max Filippov

xtensa: support common clock framework

2014-02-21T17:33:42+00:00

Signed-off-by: Max Filippov

xtensa: remap io area defined in device tree

2014-01-14T20:25:14+00:00

Use the simple-bus node to discover the io area, and remap the cached and
bypass io ranges. The parent-bus-address value of the first triplet in the
"ranges" property is used. This value is rounded down to the nearest 256MB
boundary. The length of the io area is fixed at 256MB; the "ranges" property
length value is ignored.

Other limitations: (1) only the first simple-bus node is considered, and (2)
only the first triplet of the "ranges" property is considered.

See ePAPR 1.1 §6.5 for the simple-bus node description, and §2.3.8 for the
"ranges" property description.

Signed-off-by: Baruch Siach 
Signed-off-by: Max Filippov

xtensa: support default device tree buses

2014-01-14T20:24:12+00:00

This currently includes simple-bus.

Signed-off-by: Baruch Siach 
Signed-off-by: Max Filippov

xtensa: implement CPU hotplug

2014-01-14T18:19:59+00:00

Signed-off-by: Max Filippov 
Signed-off-by: Chris Zankel

xtensa: add SMP support

2014-01-14T18:19:58+00:00

This is largely based on SMP code from the xtensa-2.6.29-smp tree by
Piet Delaney, Marc Gauthier, Joe Taylor, Christian Zankel (and possibly
other Tensilica folks).

Signed-off-by: Max Filippov 
Signed-off-by: Chris Zankel

xtensa: move init_mmu declaration to mmu_context.h

2014-01-14T18:19:56+00:00

Secondary CPUs need this declaration to initialize their MMUs.

Signed-off-by: Max Filippov 
Signed-off-by: Chris Zankel

xtensa: call check_s32c1i after trap_init

2014-01-14T18:19:55+00:00

Otherwise exceptions may occur prior to exception handling mechanism
initialization, resulting in silently dead system.

Signed-off-by: Max Filippov 
Signed-off-by: Chris Zankel