[ARM] 4185/2: entry: introduce get_irqnr_preamble and arch_ret_to_user

get_irqnr_preamble allows machines to take some action before entering the
get_irqnr_and_base loop.  On iop we enable cp6 access.

arch_ret_to_user is added to the userspace return path to allow individual
architectures to take actions, like disabling coprocessor access, before
the final return to userspace.

Per Nicolas Pitre's note, there is no need to cp_wait on the return to user
as the latency to return is sufficient.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

This commit is contained in:

Dan Williams

2007-02-16 22:16:32 +01:00

committed by

Russell King

parent 588ef76935

commit f80dff9da0

30 changed files with 219 additions and 26 deletions

									
										arch/arm/kernel/entry-armv.S
									
		+1
		
												View File
												
				@@ -27,6 +27,7 @@

				 * Interrupt handling.  Preserves r7, r8, r9

				 */

					.macro	irq_handler

					get_irqnr_preamble r5, lr

				1:	get_irqnr_and_base r0, r6, r5, lr

					movne	r1, sp

					@