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1da177e4 LT |
1 | /* |
2 | * include/asm-ppc/ppc4xx_pic.h | |
3 | * | |
4 | * Interrupt controller driver for PowerPC 4xx-based processors. | |
5 | * | |
6 | * Copyright (c) 1999 Grant Erickson <grant@lcse.umn.edu> | |
7 | * | |
8 | * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net> | |
9 | * Copyright (c) 2004 Zultys Technologies | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or modify it | |
12 | * under the terms of the GNU General Public License as published by the | |
13 | * Free Software Foundation; either version 2 of the License, or (at your | |
14 | * option) any later version. | |
15 | */ | |
16 | ||
17 | #ifndef __PPC4XX_PIC_H__ | |
18 | #define __PPC4XX_PIC_H__ | |
19 | ||
1da177e4 LT |
20 | #include <linux/types.h> |
21 | #include <linux/irq.h> | |
22 | ||
23 | /* "Fixed" UIC settings (they are chip, not board specific), | |
24 | * e.g. polarity/triggerring for internal interrupt sources. | |
25 | * | |
26 | * Platform port should provide NR_UICS-sized array named ppc4xx_core_uic_cfg | |
27 | * with these "fixed" settings: .polarity contains exact value which will | |
28 | * be written (masked with "ext_irq_mask") into UICx_PR register, | |
29 | * .triggering - to UICx_TR. | |
30 | * | |
31 | * Settings for external IRQs can be specified separately by the | |
32 | * board support code. In this case properly sized array of unsigned | |
33 | * char named ppc4xx_uic_ext_irq_cfg should be filled with correct | |
34 | * values using IRQ_SENSE_XXXXX and IRQ_POLARITY_XXXXXXX defines. | |
35 | * | |
36 | * If these arrays aren't provided, UIC initialization code keeps firmware | |
37 | * configuration. Also, ppc4xx_uic_ext_irq_cfg implies ppc4xx_core_uic_cfg | |
38 | * is defined. | |
39 | * | |
40 | * Both ppc4xx_core_uic_cfg and ppc4xx_uic_ext_irq_cfg are declared as | |
41 | * "weak" symbols in ppc4xx_pic.c | |
42 | * | |
43 | */ | |
44 | struct ppc4xx_uic_settings { | |
45 | u32 polarity; | |
46 | u32 triggering; | |
47 | u32 ext_irq_mask; | |
48 | }; | |
49 | ||
50 | extern void ppc4xx_pic_init(void); | |
51 | ||
52 | #endif /* __PPC4XX_PIC_H__ */ |