[ARM] 4185/2: entry: introduce get_irqnr_preamble and arch_ret_to_user
[linux-2.6] / include / asm-arm / arch-pxa / entry-macro.S
1 /*
2  * include/asm-arm/arch-pxa/entry-macro.S
3  *
4  * Low-level IRQ helper macros for PXA-based 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/arch/irqs.h>
12
13                 .macro  disable_fiq
14                 .endm
15
16                 .macro  get_irqnr_preamble, base, tmp
17                 .endm
18
19                 .macro  arch_ret_to_user, tmp1, tmp2
20                 .endm
21
22                 .macro  get_irqnr_and_base, irqnr, irqstat, base, tmp
23 #ifdef CONFIG_PXA27x
24                 mrc     p6, 0, \irqstat, c0, c0, 0              @ ICIP
25                 mrc     p6, 0, \irqnr, c1, c0, 0                @ ICMR
26 #else
27                 mov     \base, #io_p2v(0x40000000)      @ IIR Ctl = 0x40d00000
28                 add     \base, \base, #0x00d00000
29                 ldr     \irqstat, [\base, #0]           @ ICIP
30                 ldr     \irqnr, [\base, #4]             @ ICMR
31 #endif
32                 ands    \irqnr, \irqstat, \irqnr
33                 beq     1001f
34                 rsb     \irqstat, \irqnr, #0
35                 and     \irqstat, \irqstat, \irqnr
36                 clz     \irqnr, \irqstat
37                 rsb     \irqnr, \irqnr, #(31 - PXA_IRQ_SKIP)
38 1001:
39                 .endm