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60 lines
1.7 KiB
C
60 lines
1.7 KiB
C
#ifndef _MPC8XX_IRQ_H
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#define _MPC8XX_IRQ_H
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/* The MPC8xx cores have 16 possible interrupts. There are eight
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* possible level sensitive interrupts assigned and generated internally
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* from such devices as CPM, PCMCIA, RTC, PIT, TimeBase and Decrementer.
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* There are eight external interrupts (IRQs) that can be configured
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* as either level or edge sensitive.
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*
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* On some implementations, there is also the possibility of an 8259
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* through the PCI and PCI-ISA bridges.
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*
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* We don't support the 8259 (yet).
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*/
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#define NR_SIU_INTS 16
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#define NR_8259_INTS 0
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#define NR_IRQS (NR_SIU_INTS + NR_8259_INTS)
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/* These values must be zero-based and map 1:1 with the SIU configuration.
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* They are used throughout the 8xx I/O subsystem to generate
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* interrupt masks, flags, and other control patterns. This is why the
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* current kernel assumption of the 8259 as the base controller is such
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* a pain in the butt.
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*/
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#define SIU_IRQ0 (0) /* Highest priority */
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#define SIU_LEVEL0 (1)
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#define SIU_IRQ1 (2)
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#define SIU_LEVEL1 (3)
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#define SIU_IRQ2 (4)
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#define SIU_LEVEL2 (5)
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#define SIU_IRQ3 (6)
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#define SIU_LEVEL3 (7)
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#define SIU_IRQ4 (8)
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#define SIU_LEVEL4 (9)
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#define SIU_IRQ5 (10)
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#define SIU_LEVEL5 (11)
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#define SIU_IRQ6 (12)
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#define SIU_LEVEL6 (13)
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#define SIU_IRQ7 (14)
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#define SIU_LEVEL7 (15)
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/* The internal interrupts we can configure as we see fit.
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* My personal preference is CPM at level 2, which puts it above the
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* MBX PCI/ISA/IDE interrupts.
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*/
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#ifdef CONFIG_SYS_CPM_INTERRUPT
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# define CPM_INTERRUPT CONFIG_SYS_CPM_INTERRUPT
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#else
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# define CPM_INTERRUPT SIU_LEVEL2
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#endif
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/* Some internal interrupt registers use an 8-bit mask for the interrupt
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* level instead of a number.
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*/
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#define mk_int_int_mask(IL) (1 << (7 - (IL/2)))
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#endif /* _MPC8XX_IRQ_H */
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