This commit was manufactured by cvs2svn to create branch 'vserver'.
[linux-2.6.git] / include / asm-arm / arch-pnx4008 / entry-macro.S
1 /*
2  * include/asm-arm/arch-pnx4008/entry-macro.S
3  *
4  * Low-level IRQ helper macros for PNX4008-based platforms
5  *
6  * 2005-2006 (c) MontaVista Software, Inc.
7  * Author: Vitaly Wool <vwool@ru.mvista.com>
8  * This file is licensed under  the terms of the GNU General Public
9  * License version 2. This program is licensed "as is" without any
10  * warranty of any kind, whether express or implied.
11  */
12
13 #include "platform.h"
14
15 #define IO_BASE         0xF0000000
16 #define IO_ADDRESS(x)  (((((x) & 0xff000000) >> 4) | ((x) & 0xfffff)) | IO_BASE)
17
18 #define INTRC_MASK                      0x00
19 #define INTRC_RAW_STAT                  0x04
20 #define INTRC_STAT                      0x08
21 #define INTRC_POLAR                     0x0C
22 #define INTRC_ACT_TYPE                  0x10
23 #define INTRC_TYPE                      0x14
24
25 #define SIC1_BASE_INT   32
26 #define SIC2_BASE_INT   64
27
28                 .macro  disable_fiq
29                 .endm
30
31                 .macro  get_irqnr_and_base, irqnr, irqstat, base, tmp
32 /* decode the MIC interrupt numbers */
33                 ldr     \base, =IO_ADDRESS(PNX4008_INTCTRLMIC_BASE)
34                 ldr     \irqstat, [\base, #INTRC_STAT]
35
36                 cmp     \irqstat,#1<<16
37                 movhs   \irqnr,#16
38                 movlo   \irqnr,#0
39                 movhs   \irqstat,\irqstat,lsr#16
40                 cmp     \irqstat,#1<<8
41                 addhs   \irqnr,\irqnr,#8
42                 movhs   \irqstat,\irqstat,lsr#8
43                 cmp     \irqstat,#1<<4
44                 addhs   \irqnr,\irqnr,#4
45                 movhs   \irqstat,\irqstat,lsr#4
46                 cmp     \irqstat,#1<<2
47                 addhs   \irqnr,\irqnr,#2
48                 movhs   \irqstat,\irqstat,lsr#2
49                 cmp     \irqstat,#1<<1
50                 addhs   \irqnr,\irqnr,#1
51
52 /* was there an interrupt ? if not then drop out with EQ status */
53                 teq     \irqstat,#0
54                 beq     1003f
55
56 /* and now check for extended IRQ reasons */
57                 cmp     \irqnr,#1
58                 bls     1003f
59                 cmp     \irqnr,#30
60                 blo     1002f
61
62 /* IRQ 31,30  : High priority cascade IRQ handle */
63 /* read the correct SIC */
64 /* decoding status after compare : eq is 30 (SIC1) , ne is 31 (SIC2) */
65 /* set the base IRQ number */
66                 ldreq   \base, =IO_ADDRESS(PNX4008_INTCTRLSIC1_BASE)
67                 moveq  \irqnr,#SIC1_BASE_INT
68                 ldrne   \base, =IO_ADDRESS(PNX4008_INTCTRLSIC2_BASE)
69                 movne   \irqnr,#SIC2_BASE_INT
70                 ldr     \irqstat, [\base, #INTRC_STAT]
71                 ldr     \tmp,     [\base, #INTRC_TYPE]
72 /* and with inverted mask : low priority interrupts  */
73                 and     \irqstat,\irqstat,\tmp
74                 b       1004f
75
76 1003:
77 /* IRQ 1,0  : Low priority cascade IRQ handle */
78 /* read the correct SIC */
79 /* decoding status after compare : eq is 1 (SIC2) , ne is 0 (SIC1)*/
80 /* read the correct SIC */
81 /* set the base IRQ number  */
82                 ldrne   \base, =IO_ADDRESS(PNX4008_INTCTRLSIC1_BASE)
83                 movne   \irqnr,#SIC1_BASE_INT
84                 ldreq   \base, =IO_ADDRESS(PNX4008_INTCTRLSIC2_BASE)
85                 moveq   \irqnr,#SIC2_BASE_INT
86                 ldr     \irqstat, [\base, #INTRC_STAT]
87                 ldr     \tmp,     [\base, #INTRC_TYPE]
88 /* and with inverted mask : low priority interrupts  */
89                 bic     \irqstat,\irqstat,\tmp
90
91 1004:
92
93                 cmp     \irqstat,#1<<16
94                 addhs   \irqnr,\irqnr,#16
95                 movhs   \irqstat,\irqstat,lsr#16
96                 cmp     \irqstat,#1<<8
97                 addhs   \irqnr,\irqnr,#8
98                 movhs   \irqstat,\irqstat,lsr#8
99                 cmp     \irqstat,#1<<4
100                 addhs   \irqnr,\irqnr,#4
101                 movhs   \irqstat,\irqstat,lsr#4
102                 cmp     \irqstat,#1<<2
103                 addhs   \irqnr,\irqnr,#2
104                 movhs   \irqstat,\irqstat,lsr#2
105                 cmp     \irqstat,#1<<1
106                 addhs   \irqnr,\irqnr,#1
107
108
109 /* is irqstat not zero */
110
111 1002:
112 /* we assert that irqstat is not equal to zero and return ne status if true*/
113                 teq     \irqstat,#0
114 1003:
115                 .endm
116
117
118                 .macro  irq_prio_table
119                 .endm
120
121