diff options
Diffstat (limited to 'init.c')
| -rw-r--r-- | init.c | 27 |
1 files changed, 27 insertions, 0 deletions
@@ -22,6 +22,7 @@ #include <stddef.h> #include "hwrpb.h" #include "osf.h" +#include "ioport.h" #include "uart.h" #include "protos.h" #include SYSTEM_H @@ -230,6 +231,30 @@ init_pcb (void) pcb.flags = 1; /* FEN */ } +static void +init_i8259 (void) +{ + /* Initialize the slave PIC. */ + outb(0x11, PORT_PIC2_CMD); /* ICW1: edge trigger, cascade, ICW4 req */ + outb(0x08, PORT_PIC2_DATA); /* ICW2: irq offset = 8 */ + outb(0x02, PORT_PIC2_DATA); /* ICW3: slave ID 2 */ + outb(0x01, PORT_PIC2_DATA); /* ICW4: not special nested, normal eoi */ + + /* Initialize the master PIC. */ + outb(0x11, PORT_PIC1_CMD); /* ICW1 */ + outb(0x00, PORT_PIC1_DATA); /* ICW2: irq offset = 0 */ + outb(0x04, PORT_PIC1_DATA); /* ICW3: slave control INTC2 */ + outb(0x01, PORT_PIC1_DATA); /* ICW4 */ + + /* Disable all interrupts. */ + outb(0xff, PORT_PIC2_DATA); + outb(0xff, PORT_PIC1_DATA); + + /* Non-specific EOI, clearing anything the might be pending. */ + outb(0x20, PORT_PIC2_CMD); + outb(0x20, PORT_PIC1_CMD); +} + void do_start(unsigned long memsize, void (*kernel_entry)(void), long cpus) { @@ -238,7 +263,9 @@ do_start(unsigned long memsize, void (*kernel_entry)(void), long cpus) init_page_table(); init_hwrpb(memsize); init_pcb(); + init_i8259(); uart_init(); + ps2port_setup(); { register int variant __asm__("$16") = 2; /* OSF/1 PALcode */ |