5 #include <linux/config.h>
6 #include <asm/machdep.h> /* ppc_md */
7 #include <asm/atomic.h>
9 extern void disable_irq(unsigned int);
10 extern void disable_irq_nosync(unsigned int);
11 extern void enable_irq(unsigned int);
14 * These constants are used for passing information about interrupt
15 * signal polarity and level/edge sensing to the low-level PIC chip
18 #define IRQ_SENSE_MASK 0x1
19 #define IRQ_SENSE_LEVEL 0x1 /* interrupt on active level */
20 #define IRQ_SENSE_EDGE 0x0 /* interrupt triggered by edge */
22 #define IRQ_POLARITY_MASK 0x2
23 #define IRQ_POLARITY_POSITIVE 0x2 /* high level or low->high edge */
24 #define IRQ_POLARITY_NEGATIVE 0x0 /* low level or high->low edge */
26 #if defined(CONFIG_40x)
27 #include <asm/ibm4xx.h>
30 #define NR_BOARD_IRQS 0
33 #ifndef UIC_WIDTH /* Number of interrupts per device */
37 #ifndef NR_UICS /* number of UIC devices */
41 #if defined (CONFIG_403)
43 * The PowerPC 403 cores' Asynchronous Interrupt Controller (AIC) has
44 * 32 possible interrupts, a majority of which are not implemented on
45 * all cores. There are six configurable, external interrupt pins and
46 * there are eight internal interrupts for the on-chip serial port
47 * (SPU), DMA controller, and JTAG controller.
51 #define NR_AIC_IRQS 32
52 #define NR_IRQS (NR_AIC_IRQS + NR_BOARD_IRQS)
54 #elif !defined (CONFIG_403)
57 * The PowerPC 405 cores' Universal Interrupt Controller (UIC) has 32
58 * possible interrupts as well. There are seven, configurable external
59 * interrupt pins and there are 17 internal interrupts for the on-chip
60 * serial port, DMA controller, on-chip Ethernet controller, PCI, etc.
65 #define NR_UIC_IRQS UIC_WIDTH
66 #define NR_IRQS ((NR_UIC_IRQS * NR_UICS) + NR_BOARD_IRQS)
69 irq_canonicalize(int irq)
74 #elif defined(CONFIG_44x)
75 #include <asm/ibm44x.h>
77 #define NR_UIC_IRQS 32
78 #define NR_IRQS ((NR_UIC_IRQS * NR_UICS) + NR_BOARD_IRQS)
81 irq_canonicalize(int irq)
86 #elif defined(CONFIG_8xx)
88 /* The MPC8xx cores have 16 possible interrupts. There are eight
89 * possible level sensitive interrupts assigned and generated internally
90 * from such devices as CPM, PCMCIA, RTC, PIT, TimeBase and Decrementer.
91 * There are eight external interrupts (IRQs) that can be configured
92 * as either level or edge sensitive.
94 * On some implementations, there is also the possibility of an 8259
95 * through the PCI and PCI-ISA bridges.
97 #define NR_SIU_INTS 16
99 #define NR_IRQS (NR_SIU_INTS + NR_8259_INTS)
101 /* These values must be zero-based and map 1:1 with the SIU configuration.
102 * They are used throughout the 8xx I/O subsystem to generate
103 * interrupt masks, flags, and other control patterns. This is why the
104 * current kernel assumption of the 8259 as the base controller is such
105 * a pain in the butt.
107 #define SIU_IRQ0 (0) /* Highest priority */
108 #define SIU_LEVEL0 (1)
110 #define SIU_LEVEL1 (3)
112 #define SIU_LEVEL2 (5)
114 #define SIU_LEVEL3 (7)
116 #define SIU_LEVEL4 (9)
117 #define SIU_IRQ5 (10)
118 #define SIU_LEVEL5 (11)
119 #define SIU_IRQ6 (12)
120 #define SIU_LEVEL6 (13)
121 #define SIU_IRQ7 (14)
122 #define SIU_LEVEL7 (15)
124 /* Now include the board configuration specific associations.
126 #include <asm/mpc8xx.h>
128 /* The internal interrupts we can configure as we see fit.
129 * My personal preference is CPM at level 2, which puts it above the
130 * MBX PCI/ISA/IDE interrupts.
132 #ifndef PIT_INTERRUPT
133 #define PIT_INTERRUPT SIU_LEVEL0
135 #ifndef CPM_INTERRUPT
136 #define CPM_INTERRUPT SIU_LEVEL2
138 #ifndef PCMCIA_INTERRUPT
139 #define PCMCIA_INTERRUPT SIU_LEVEL6
141 #ifndef DEC_INTERRUPT
142 #define DEC_INTERRUPT SIU_LEVEL7
145 /* Some internal interrupt registers use an 8-bit mask for the interrupt
146 * level instead of a number.
148 #define mk_int_int_mask(IL) (1 << (7 - (IL/2)))
150 /* always the same on 8xx -- Cort */
151 static __inline__ int irq_canonicalize(int irq)
156 #else /* CONFIG_40x + CONFIG_8xx */
158 * this is the # irq's for all ppc arch's (pmac/chrp/prep)
159 * so it is the max of them all
165 #define NUM_8259_INTERRUPTS 16
167 #else /* CONFIG_8260 */
169 /* The 8260 has an internal interrupt controller with a maximum of
170 * 64 IRQs. We will use NR_IRQs from above since it is large enough.
171 * Don't be confused by the 8260 documentation where they list an
172 * "interrupt number" and "interrupt vector". We are only interested
173 * in the interrupt vector. There are "reserved" holes where the
174 * vector number increases, but the interrupt number in the table does not.
175 * (Document errata updates have fixed this...make sure you have up to
176 * date processor documentation -- Dan).
178 #define NR_SIU_INTS 64
180 /* There are many more than these, we will add them as we need them.
182 #define SIU_INT_SMC1 ((uint)0x04)
183 #define SIU_INT_SMC2 ((uint)0x05)
184 #define SIU_INT_FCC1 ((uint)0x20)
185 #define SIU_INT_FCC2 ((uint)0x21)
186 #define SIU_INT_FCC3 ((uint)0x22)
187 #define SIU_INT_SCC1 ((uint)0x28)
188 #define SIU_INT_SCC2 ((uint)0x29)
189 #define SIU_INT_SCC3 ((uint)0x2a)
190 #define SIU_INT_SCC4 ((uint)0x2b)
192 #endif /* CONFIG_8260 */
195 * This gets called from serial.c, which is now used on
196 * powermacs as well as prep/chrp boxes.
197 * Prep and chrp both have cascaded 8259 PICs.
199 static __inline__ int irq_canonicalize(int irq)
201 if (ppc_md.irq_canonicalize)
202 return ppc_md.irq_canonicalize(irq);
208 #define NR_MASK_WORDS ((NR_IRQS + 31) / 32)
209 /* pedantic: these are long because they are used with set_bit --RR */
210 extern unsigned long ppc_cached_irq_mask[NR_MASK_WORDS];
211 extern unsigned long ppc_lost_interrupts[NR_MASK_WORDS];
212 extern atomic_t ppc_n_lost_interrupts;
216 int handle_IRQ_event(unsigned int, struct pt_regs *, struct irqaction *);
218 #endif /* _ASM_IRQ_H */
219 #endif /* __KERNEL__ */