[PATCH] tty_io.c balance tty_ldisc_ref()
[linux/fpc-iii.git] / include / asm-arm / arch-h720x / entry-macro.S
blob8f165648e2af0718a5d21e9fbc40ceea6987be00
1 /*
2  * include/asm-arm/arch-h720x/entry-macro.S
3  *
4  * Low-level IRQ helper macros for Hynix HMS720x 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  */
11                 .macro  disable_fiq
12                 .endm
14                 .macro  get_irqnr_and_base, irqnr, irqstat, base, tmp
15 #if defined (CONFIG_CPU_H7201) || defined (CONFIG_CPU_H7202)
16                 @ we could use the id register on H7202, but this is not
17                 @ properly updated when we come back from asm_do_irq
18                 @ without a previous return from interrupt
19                 @ (see loops below in irq_svc, irq_usr)
20                 @ We see unmasked pending ints only, as the masked pending ints
21                 @ are not visible here
23                 mov     \base, #0xf0000000             @ base register
24                 orr     \base, \base, #0x24000         @ irqbase
25                 ldr     \irqstat, [\base, #0x04]        @ get interrupt status
26 #if defined (CONFIG_CPU_H7201)
27                 ldr     \tmp, =0x001fffff
28 #else
29                 mvn     \tmp, #0xc0000000
30 #endif
31                 and     \irqstat, \irqstat, \tmp        @ mask out unused ints
32                 mov     \irqnr, #0
34                 mov     \tmp, #0xff00
35                 orr     \tmp, \tmp, #0xff
36                 tst     \irqstat, \tmp
37                 addeq   \irqnr, \irqnr, #16
38                 moveq   \irqstat, \irqstat, lsr #16
39                 tst     \irqstat, #255
40                 addeq   \irqnr, \irqnr, #8
41                 moveq   \irqstat, \irqstat, lsr #8
42                 tst     \irqstat, #15
43                 addeq   \irqnr, \irqnr, #4
44                 moveq   \irqstat, \irqstat, lsr #4
45                 tst     \irqstat, #3
46                 addeq   \irqnr, \irqnr, #2
47                 moveq   \irqstat, \irqstat, lsr #2
48                 tst     \irqstat, #1
49                 addeq   \irqnr, \irqnr, #1
50                 moveq   \irqstat, \irqstat, lsr #1
51                 tst     \irqstat, #1                   @ bit 0 should be set
52                 .endm
54                 .macro  irq_prio_table
55                 .endm
57 #else
58 #error hynix processor selection missmatch
59 #endif