android_kernel_motorola_sm6225/include/asm-arm/arch-versatile/entry-macro.S
Russell King fa0fe48fcc [ARM] Separate VIC (vectored interrupt controller) support from Versatile
Other machines may wish to make use of the VIC support code, so
move it to arch/arm/common.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-01-13 21:30:48 +00:00

38 lines
948 B
ArmAsm

/*
* include/asm-arm/arch-versatile/entry-macro.S
*
* Low-level IRQ helper macros for Versatile platforms
*
* This file is licensed under the terms of the GNU General Public
* License version 2. This program is licensed "as is" without any
* warranty of any kind, whether express or implied.
*/
#include <asm/hardware.h>
#include <asm/hardware/vic.h>
.macro disable_fiq
.endm
.macro get_irqnr_and_base, irqnr, irqstat, base, tmp
ldr \base, =IO_ADDRESS(VERSATILE_VIC_BASE)
ldr \irqstat, [\base, #VIC_IRQ_STATUS] @ get masked status
mov \irqnr, #0
teq \irqstat, #0
beq 1003f
1001: tst \irqstat, #15
bne 1002f
add \irqnr, \irqnr, #4
movs \irqstat, \irqstat, lsr #4
bne 1001b
1002: tst \irqstat, #1
bne 1003f
add \irqnr, \irqnr, #1
movs \irqstat, \irqstat, lsr #1
bne 1002b
1003: /* EQ will be set if no irqs pending */
@ clz \irqnr, \irqstat
@1003: /* EQ will be set if we reach MAXIRQNUM */
.endm