aboutsummaryrefslogtreecommitdiffstats
path: root/arch/arm/mach-omap2/include/mach/entry-macro.S
blob: 06e64e1fc28a7e18957ff0bb9fe620e7487f7284 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
/*
 * arch/arm/plat-omap/include/mach/entry-macro.S
 *
 * Low-level IRQ helper macros for OMAP-based platforms
 *
 * Copyright (C) 2009 Texas Instruments
 * Added OMAP4 support - Santosh Shilimkar <santosh.shilimkar@ti.com>
 *
 * This file is licensed under  the terms of the GNU General Public
 * License version 2. This program is licensed "as is" without any
 * warranty of any kind, whether express or implied.
 */
#include <mach/hardware.h>
#include <mach/io.h>
#include <mach/irqs.h>
#include <asm/hardware/gic.h>

#include <plat/omap24xx.h>
#include <plat/omap34xx.h>
#include <plat/omap44xx.h>

#include <plat/multi.h>

#define OMAP2_IRQ_BASE		OMAP2_L4_IO_ADDRESS(OMAP24XX_IC_BASE)
#define OMAP3_IRQ_BASE		OMAP2_L4_IO_ADDRESS(OMAP34XX_IC_BASE)
#define OMAP4_IRQ_BASE		OMAP2_L4_IO_ADDRESS(OMAP44XX_GIC_CPU_BASE)
#define INTCPS_SIR_IRQ_OFFSET	0x0040	/* omap2/3 active interrupt offset */
#define	ACTIVEIRQ_MASK		0x7f	/* omap2/3 active interrupt bits */

		.macro	disable_fiq
		.endm

		.macro  arch_ret_to_user, tmp1, tmp2
		.endm

/*
 * Unoptimized irq functions for multi-omap2, 3 and 4
 */

#ifdef MULTI_OMAP2
		.pushsection .data
omap_irq_base:	.word	0
		.popsection

		/* Configure the interrupt base on the first interrupt */
		.macro  get_irqnr_preamble, base, tmp
9:
		ldr	\base, =omap_irq_base	@ irq base address
		ldr	\base, [\base, #0]	@ irq base value
		cmp	\base, #0		@ already configured?
		bne	9997f			@ nothing to do

		mrc	p15, 0, \tmp, c0, c0, 0	@ get processor revision
		and	\tmp, \tmp, #0x000f0000	@ only check architecture
		cmp	\tmp, #0x00070000	@ is v6?
		beq	2400f			@ found v6 so it's omap24xx
		mrc	p15, 0, \tmp, c0, c0, 0	@ get processor revision
		and	\tmp, \tmp, #0x000000f0	@ check cortex 8 or 9
		cmp	\tmp, #0x00000080	@ cortex A-8?
		beq	3400f			@ found A-8 so it's omap34xx
		cmp	\tmp, #0x00000090	@ cortex A-9?
		beq	4400f			@ found A-9 so it's omap44xx
2400:		ldr	\base, =OMAP2_IRQ_BASE
		ldr	\tmp, =omap_irq_base
		str	\base, [\tmp, #0]
		b	9b
3400:		ldr	\base, =OMAP3_IRQ_BASE
		ldr	\tmp, =omap_irq_base
		str	\base, [\tmp, #0]
		b	9b
4400:		ldr	\base, =OMAP4_IRQ_BASE
		ldr	\tmp, =omap_irq_base
		str	\base, [\tmp, #0]
		b	9b
9997:
		.endm

		/* Check the pending interrupts. Note that base already set */
		.macro	get_irqnr_and_base, irqnr, irqstat, base, tmp
		tst	\base, #0x100		@ gic address?
		bne	4401f			@ found gic

		/* Handle omap2 and omap3 */
		ldr	\irqnr, [\base, #0x98] /* IRQ pending reg 1 */
		cmp	\irqnr, #0x0
		bne	9998f
		ldr	\irqnr, [\base, #0xb8] /* IRQ pending reg 2 */
		cmp	\irqnr, #0x0
		bne	9998f
		ldr	\irqnr, [\base, #0xd8] /* IRQ pending reg 3 */
		cmp	\irqnr, #0x0
9998:
		ldrne	\irqnr, [\base, #INTCPS_SIR_IRQ_OFFSET]
		and	\irqnr, \irqnr, #ACTIVEIRQ_MASK /* Clear spurious bits */
		b	9999f

		/* Handle omap4 */
4401:		ldr     \irqstat, [\base, #GIC_CPU_INTACK]
		ldr     \tmp, =1021
		bic     \irqnr, \irqstat, #0x1c00
		cmp     \irqnr, #29
		cmpcc   \irqnr, \irqnr
		cmpne   \irqnr, \tmp
		cmpcs   \irqnr, \irqnr
9999:
		.endm


#else	/* MULTI_OMAP2 */


/*
 * Optimized irq functions for omap2, 3 and 4
 */

#if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
		.macro  get_irqnr_preamble, base, tmp
#ifdef CONFIG_ARCH_OMAP2
		ldr	\base, =OMAP2_IRQ_BASE
#else
		ldr	\base, =OMAP3_IRQ_BASE
#endif
		.endm

		/* Check the pending interrupts. Note that base already set */
		.macro	get_irqnr_and_base, irqnr, irqstat, base, tmp
		ldr	\irqnr, [\base, #0x98] /* IRQ pending reg 1 */
		cmp	\irqnr, #0x0
		bne	9999f
		ldr	\irqnr, [\base, #0xb8] /* IRQ pending reg 2 */
		cmp	\irqnr, #0x0
		bne	9999f
		ldr	\irqnr, [\base, #0xd8] /* IRQ pending reg 3 */
		cmp	\irqnr, #0x0
9999:
		ldrne	\irqnr, [\base, #INTCPS_SIR_IRQ_OFFSET]
		and	\irqnr, \irqnr, #ACTIVEIRQ_MASK /* Clear spurious bits */

		.endm
#endif


#ifdef CONFIG_ARCH_OMAP4

		.macro  get_irqnr_preamble, base, tmp
		ldr     \base, =OMAP4_IRQ_BASE
		.endm

		/*
		 * The interrupt numbering scheme is defined in the
		 * interrupt controller spec.  To wit:
		 *
		 * Interrupts 0-15 are IPI
		 * 16-28 are reserved
		 * 29-31 are local.  We allow 30 to be used for the watchdog.
		 * 32-1020 are global
		 * 1021-1022 are reserved
		 * 1023 is "spurious" (no interrupt)
		 *
		 * For now, we ignore all local interrupts so only return an
		 * interrupt if it's between 30 and 1020.  The test_for_ipi
		 * routine below will pick up on IPIs.
		 * A simple read from the controller will tell us the number
		 * of the highest priority enabled interrupt.
		 * We then just need to check whether it is in the
		 * valid range for an IRQ (30-1020 inclusive).
		 */
		.macro  get_irqnr_and_base, irqnr, irqstat, base, tmp
		ldr     \irqstat, [\base, #GIC_CPU_INTACK]

		ldr     \tmp, =1021

		bic     \irqnr, \irqstat, #0x1c00

		cmp     \irqnr, #29
		cmpcc   \irqnr, \irqnr
		cmpne   \irqnr, \tmp
		cmpcs   \irqnr, \irqnr
		.endm
#endif
#endif	/* MULTI_OMAP2 */

#ifdef CONFIG_SMP
		/* We assume that irqstat (the raw value of the IRQ acknowledge
		 * register) is preserved from the macro above.
		 * If there is an IPI, we immediately signal end of interrupt
		 * on the controller, since this requires the original irqstat
		 * value which we won't easily be able to recreate later.
		 */

		.macro test_for_ipi, irqnr, irqstat, base, tmp
		bic	\irqnr, \irqstat, #0x1c00
		cmp	\irqnr, #16
		it	cc
		strcc	\irqstat, [\base, #GIC_CPU_EOI]
		it	cs
		cmpcs	\irqnr, \irqnr
		.endm

		/* As above, this assumes that irqstat and base are preserved */

		.macro test_for_ltirq, irqnr, irqstat, base, tmp
		bic	\irqnr, \irqstat, #0x1c00
		mov 	\tmp, #0
		cmp	\irqnr, #29
		itt	eq
		moveq	\tmp, #1
		streq	\irqstat, [\base, #GIC_CPU_EOI]
		cmp	\tmp, #0
		.endm
#endif	/* CONFIG_SMP */

		.macro	irq_prio_table
		.endm