| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #ifndef _ALPHA_HARDIRQ_H |
| 2 | #define _ALPHA_HARDIRQ_H |
| 3 | |
| 4 | #include <linux/config.h> |
| 5 | #include <linux/threads.h> |
| 6 | #include <linux/cache.h> |
| 7 | |
| 8 | |
| 9 | /* entry.S is sensitive to the offsets of these fields */ |
| 10 | typedef struct { |
| 11 | unsigned long __softirq_pending; |
| 12 | } ____cacheline_aligned irq_cpustat_t; |
| 13 | |
| 14 | #include <linux/irq_cpustat.h> /* Standard mappings for irq_cpustat_t above */ |
| 15 | |
| 16 | #define HARDIRQ_BITS 12 |
| 17 | |
| 18 | /* |
| 19 | * The hardirq mask has to be large enough to have |
| 20 | * space for potentially nestable IRQ sources in the system |
| 21 | * to nest on a single CPU. On Alpha, interrupts are masked at the CPU |
| 22 | * by IPL as well as at the system level. We only have 8 IPLs (UNIX PALcode) |
| 23 | * so we really only have 8 nestable IRQs, but allow some overhead |
| 24 | */ |
| 25 | #if (1 << HARDIRQ_BITS) < 16 |
| 26 | #error HARDIRQ_BITS is too low! |
| 27 | #endif |
| 28 | |
| 29 | #endif /* _ALPHA_HARDIRQ_H */ |