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Diffstat (limited to '')
-rw-r--r-- | c/src/lib/libcpu/i960/i960ca/cpu_install_raw_isr.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/c/src/lib/libcpu/i960/i960ca/cpu_install_raw_isr.c b/c/src/lib/libcpu/i960/i960ca/cpu_install_raw_isr.c new file mode 100644 index 0000000000..6e5f13952b --- /dev/null +++ b/c/src/lib/libcpu/i960/i960ca/cpu_install_raw_isr.c @@ -0,0 +1,38 @@ +/* + * Install raw interrupt vector for i960ca + * + * $Id$ + */ + +#include <rtems.h> +#include <libcpu/i960CA.h> + +#define i960_vector_caching_enabled( _prcb ) \ + ((_prcb)->control_tbl->icon & 0x2000) + +extern i960_PRCB *Prcb; + +void _CPU_ISR_install_raw_handler( + unsigned32 vector, + proc_ptr new_handler, + proc_ptr *old_handler +) +{ + i960_PRCB *prcb = Prcb; + proc_ptr *cached_intr_tbl = NULL; + + /* The i80960CA does not support vectors 0-7. The first 9 entries + * in the Interrupt Table are used to manage pending interrupts. + * Thus vector 8, the first valid vector number, is actually in + * slot 9 in the table. + */ + + *old_handler = prcb->intr_tbl[ vector + 1 ]; + + prcb->intr_tbl[ vector + 1 ] = new_handler; + + if ( i960_vector_caching_enabled( prcb ) ) + if ( (vector & 0xf) == 0x2 ) /* cacheable? */ + cached_intr_tbl[ vector >> 4 ] = new_handler; +} + |