1 #ifndef _MPC8XX_IRQ_H 2 #define _MPC8XX_IRQ_H 3 4 /* The MPC8xx cores have 16 possible interrupts. There are eight 5 * possible level sensitive interrupts assigned and generated internally 6 * from such devices as CPM, PCMCIA, RTC, PIT, TimeBase and Decrementer. 7 * There are eight external interrupts (IRQs) that can be configured 8 * as either level or edge sensitive. 9 * 10 * On some implementations, there is also the possibility of an 8259 11 * through the PCI and PCI-ISA bridges. 12 * 13 * We don't support the 8259 (yet). 14 */ 15 #define NR_SIU_INTS 16 16 #define NR_8259_INTS 0 17 18 #define NR_IRQS (NR_SIU_INTS + NR_8259_INTS) 19 20 /* These values must be zero-based and map 1:1 with the SIU configuration. 21 * They are used throughout the 8xx I/O subsystem to generate 22 * interrupt masks, flags, and other control patterns. This is why the 23 * current kernel assumption of the 8259 as the base controller is such 24 * a pain in the butt. 25 */ 26 #define SIU_IRQ0 (0) /* Highest priority */ 27 #define SIU_LEVEL0 (1) 28 #define SIU_IRQ1 (2) 29 #define SIU_LEVEL1 (3) 30 #define SIU_IRQ2 (4) 31 #define SIU_LEVEL2 (5) 32 #define SIU_IRQ3 (6) 33 #define SIU_LEVEL3 (7) 34 #define SIU_IRQ4 (8) 35 #define SIU_LEVEL4 (9) 36 #define SIU_IRQ5 (10) 37 #define SIU_LEVEL5 (11) 38 #define SIU_IRQ6 (12) 39 #define SIU_LEVEL6 (13) 40 #define SIU_IRQ7 (14) 41 #define SIU_LEVEL7 (15) 42 43 /* The internal interrupts we can configure as we see fit. 44 * My personal preference is CPM at level 2, which puts it above the 45 * MBX PCI/ISA/IDE interrupts. 46 */ 47 48 #ifdef CONFIG_SYS_CPM_INTERRUPT 49 # define CPM_INTERRUPT CONFIG_SYS_CPM_INTERRUPT 50 #else 51 # define CPM_INTERRUPT SIU_LEVEL2 52 #endif 53 54 /* Some internal interrupt registers use an 8-bit mask for the interrupt 55 * level instead of a number. 56 */ 57 #define mk_int_int_mask(IL) (1 << (7 - (IL/2))) 58 59 #endif /* _MPC8XX_IRQ_H */ 60