1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
30 lines
869 B
ArmAsm
30 lines
869 B
ArmAsm
/*
|
|
* 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.
|
|
*/
|
|
.macro disable_fiq
|
|
.endm
|
|
#define AITC_NIVECSR 0x40
|
|
.macro get_irqnr_and_base, irqnr, irqstat, base, tmp
|
|
ldr \irqstat, =IO_ADDRESS(IMX_AITC_BASE)
|
|
@ Load offset & priority of the highest priority
|
|
@ interrupt pending.
|
|
ldr \irqnr, [\irqstat, #AITC_NIVECSR]
|
|
@ Shift off the priority leaving the offset or
|
|
@ "interrupt number"
|
|
mov \irqnr, \irqnr, lsr #16
|
|
ldr \irqstat, =1 @ dummy compare
|
|
ldr \base, =0xFFFF // invalid interrupt
|
|
cmp \irqnr, \base
|
|
bne 1001f
|
|
ldr \irqstat, =0
|
|
1001:
|
|
tst \irqstat, #1 @ to make the condition code = TRUE
|
|
.endm
|
|
|