You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
32 lines
891 B
32 lines
891 B
/*
|
|
* include/asm-arm/arch-imx/entry-macro.S
|
|
*
|
|
* Low-level IRQ helper macros for iMX-based 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>
|
|
|
|
.macro disable_fiq
|
|
.endm
|
|
|
|
.macro get_irqnr_preamble, base, tmp
|
|
.endm
|
|
|
|
.macro arch_ret_to_user, tmp1, tmp2
|
|
.endm
|
|
|
|
#define AITC_NIVECSR 0x40
|
|
.macro get_irqnr_and_base, irqnr, irqstat, base, tmp
|
|
ldr \base, =IO_ADDRESS(IMX_AITC_BASE)
|
|
@ Load offset & priority of the highest priority
|
|
@ interrupt pending.
|
|
ldr \irqstat, [\base, #AITC_NIVECSR]
|
|
@ Shift off the priority leaving the offset or
|
|
@ "interrupt number", use arithmetic shift to
|
|
@ transform illegal source (0xffff) as -1
|
|
mov \irqnr, \irqstat, asr #16
|
|
adds \tmp, \irqnr, #1
|
|
.endm
|
|
|