diff options
| author | Marc Gauthier <marc@tensilica.com> | 2013-01-05 04:57:17 +0400 |
|---|---|---|
| committer | Chris Zankel <chris@zankel.net> | 2013-02-23 19:12:52 -0800 |
| commit | 2d1c645cc50b8f5a718b24bad9eb3931e7105d12 (patch) | |
| tree | c385e5064cee10f79b9c359ddd99bd5d1b9f838a /arch/xtensa/kernel/head.S | |
| parent | d0b73b488c55df905ea8faaad079f8535629ed26 (diff) | |
xtensa: dispatch medium-priority interrupts
Add support for dispatching medium-priority interrupts, that is,
interrupts of priority levels 2 to EXCM_LEVEL. IRQ handling may be
preempted by higher priority IRQ.
Signed-off-by: Marc Gauthier <marc@tensilica.com>
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Chris Zankel <chris@zankel.net>
Diffstat (limited to 'arch/xtensa/kernel/head.S')
| -rw-r--r-- | arch/xtensa/kernel/head.S | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/arch/xtensa/kernel/head.S b/arch/xtensa/kernel/head.S index 91d9095284de..df88f98737f4 100644 --- a/arch/xtensa/kernel/head.S +++ b/arch/xtensa/kernel/head.S @@ -7,7 +7,7 @@ * License. See the file "COPYING" in the main directory of this archive * for more details. * - * Copyright (C) 2001 - 2005 Tensilica Inc. + * Copyright (C) 2001 - 2008 Tensilica Inc. * * Chris Zankel <chris@zankel.net> * Marc Gauthier <marc@tensilica.com, marc@alumni.uwaterloo.ca> @@ -128,14 +128,14 @@ ENTRY(_startup) wsr a0, cpenable #endif - /* Set PS.INTLEVEL=1, PS.WOE=0, kernel stack, PS.EXCM=0 + /* Set PS.INTLEVEL=LOCKLEVEL, PS.WOE=0, kernel stack, PS.EXCM=0 * * Note: PS.EXCM must be cleared before using any loop * instructions; otherwise, they are silently disabled, and * at most one iteration of the loop is executed. */ - movi a1, 1 + movi a1, LOCKLEVEL wsr a1, ps rsync @@ -211,7 +211,8 @@ ENTRY(_startup) movi a1, init_thread_union addi a1, a1, KERNEL_STACK_SIZE - movi a2, 0x00040001 # WOE=1, INTLEVEL=1, UM=0 + movi a2, (1 << PS_WOE_BIT) | LOCKLEVEL + # WOE=1, INTLEVEL=LOCKLEVEL, UM=0 wsr a2, ps # (enable reg-windows; progmode stack) rsync |