diff options
Diffstat (limited to 'sys/i386/isa/intr_machdep.c')
| -rw-r--r-- | sys/i386/isa/intr_machdep.c | 27 |
1 files changed, 26 insertions, 1 deletions
diff --git a/sys/i386/isa/intr_machdep.c b/sys/i386/isa/intr_machdep.c index 503163f..48555d3 100644 --- a/sys/i386/isa/intr_machdep.c +++ b/sys/i386/isa/intr_machdep.c @@ -135,6 +135,7 @@ static driver_intr_t isa_strayintr; static void ithds_init(void *dummy); static void ithread_enable(int vector); static void ithread_disable(int vector); +static void init_i8259(void); #ifdef PC98 #define NMI_PARITY 0x04 @@ -282,6 +283,22 @@ isa_nmi(cd) } /* + * ICU reinitialize when ICU configuration has lost. + */ +void icu_reinit() +{ + int i; + u_int32_t eflags; + eflags = read_eflags(); + disable_intr(); + init_i8259(); + for(i=0;i<ICU_LEN;i++) + if(intr_handler[i] != isa_strayintr) + INTREN(1<<i); + write_eflags(eflags); +} + +/* * Create a default interrupt table to avoid problems caused by * spurious interrupts during configuration of kernel, then setup * interrupt control unit. @@ -294,8 +311,16 @@ isa_defaultirq() /* icu vectors */ for (i = 0; i < ICU_LEN; i++) icu_unset(i, (driver_intr_t *)NULL); + init_i8259(); +} + + +/* + *initialize 8259's + */ +static void init_i8259() +{ - /* initialize 8259's */ #ifdef DEV_MCA if (MCA_system) outb(IO_ICU1, 0x19); /* reset; program device, four bytes */ |
