linux/include/asm-arm/arch-ebsa110/entry-macro.S
Linus Torvalds 1da177e4c3 Linux-2.6.12-rc2
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!
2005-04-16 15:20:36 -07:00

33 lines
756 B
ArmAsm

/*
* include/asm-arm/arch-ebsa110/entry-macro.S
*
* Low-level IRQ helper macros for ebsa110 platform.
*
* 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.
*/
#define IRQ_STAT 0xff000000 /* read */
.macro disable_fiq
.endm
.macro get_irqnr_and_base, irqnr, stat, base, tmp
mov \base, #IRQ_STAT
ldrb \stat, [\base] @ get interrupts
mov \irqnr, #0
tst \stat, #15
addeq \irqnr, \irqnr, #4
moveq \stat, \stat, lsr #4
tst \stat, #3
addeq \irqnr, \irqnr, #2
moveq \stat, \stat, lsr #2
tst \stat, #1
addeq \irqnr, \irqnr, #1
moveq \stat, \stat, lsr #1
tst \stat, #1 @ bit 0 should be set
.endm