Merge branch 'master'
[linux-2.6] / include / asm-arm / arch-versatile / entry-macro.S
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 #include <asm/hardware.h>
11 #include <asm/hardware/vic.h>
12
13                 .macro  disable_fiq
14                 .endm
15
16                 .macro  get_irqnr_and_base, irqnr, irqstat, base, tmp
17                 ldr     \base, =IO_ADDRESS(VERSATILE_VIC_BASE)
18                 ldr     \irqstat, [\base, #VIC_IRQ_STATUS]      @ get masked status
19                 mov     \irqnr, #0
20                 teq     \irqstat, #0
21                 beq     1003f
22
23 1001:           tst     \irqstat, #15
24                 bne     1002f
25                 add     \irqnr, \irqnr, #4
26                 movs    \irqstat, \irqstat, lsr #4
27                 bne     1001b
28 1002:           tst     \irqstat, #1
29                 bne     1003f
30                 add     \irqnr, \irqnr, #1
31                 movs    \irqstat, \irqstat, lsr #1
32                 bne     1002b
33 1003:           /* EQ will be set if no irqs pending */
34
35 @               clz     \irqnr, \irqstat
36 @1003:          /* EQ will be set if we reach MAXIRQNUM */
37                 .endm
38