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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/asm-arm/arch-versatile/entry-macro.S
Linux-2.6.12-rc2v2.6.12-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!
Diffstat (limited to 'include/asm-arm/arch-versatile/entry-macro.S')
-rw-r--r--include/asm-arm/arch-versatile/entry-macro.S35
1 files changed, 35 insertions, 0 deletions
diff --git a/include/asm-arm/arch-versatile/entry-macro.S b/include/asm-arm/arch-versatile/entry-macro.S
new file mode 100644
index 000000000000..90e4e970d253
--- /dev/null
+++ b/include/asm-arm/arch-versatile/entry-macro.S
@@ -0,0 +1,35 @@
1/*
2 * include/asm-arm/arch-versatile/entry-macro.S
3 *
4 * Low-level IRQ helper macros for Versatile platforms
5 *
6 * This file is licensed under the terms of the GNU General Public
7 * License version 2. This program is licensed "as is" without any
8 * warranty of any kind, whether express or implied.
9 */
10 .macro disable_fiq
11 .endm
12
13 .macro get_irqnr_and_base, irqnr, irqstat, base, tmp
14 ldr \base, =IO_ADDRESS(VERSATILE_VIC_BASE)
15 ldr \irqstat, [\base, #VIC_IRQ_STATUS] @ get masked status
16 mov \irqnr, #0
17 teq \irqstat, #0
18 beq 1003f
19
201001: tst \irqstat, #15
21 bne 1002f
22 add \irqnr, \irqnr, #4
23 movs \irqstat, \irqstat, lsr #4
24 bne 1001b
251002: tst \irqstat, #1
26 bne 1003f
27 add \irqnr, \irqnr, #1
28 movs \irqstat, \irqstat, lsr #1
29 bne 1002b
301003: /* EQ will be set if no irqs pending */
31
32@ clz \irqnr, \irqstat
33@1003: /* EQ will be set if we reach MAXIRQNUM */
34 .endm
35