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