1991/0731/pc/trap.c (diff list | history)

1991/0727/sys/src/9/pc/trap.c:10,15 – 1991/0731/sys/src/9/pc/trap.c:10,26 (short | long | prev | next)
1991/0720		void noted(Ureg*, ulong); void notify(Ureg*);
1991/0731		void intr0(void), intr1(void), intr2(void), intr3(void); void intr4(void), intr5(void), intr6(void), intr7(void); void intr8(void), intr9(void), intr10(void), intr11(void); void intr12(void), intr13(void), intr14(void), intr15(void); void intr16(void), intr17(void), intr18(void), intr19(void); void intr20(void), intr21(void), intr22(void), intr23(void); void intr24(void), intr25(void), intr26(void), intr27(void); void intr28(void), intr29(void), intr30(void), intr31(void); void intr64(void); void intrbad(void);
1991/0613		/*
1991/0709		* 8259 interrupt controllers */
1991/0727/sys/src/9/pc/trap.c:23,30 – 1991/0731/sys/src/9/pc/trap.c:34,41
1991/0709		EOI= 0x20, /* non-specific end of interrupt */ }; int int0mask = 7; /* interrupts enabled for first 8259 */ int int1mask = 7; /* interrupts enabled for second 8259 */
1991/0731		int int0mask = 0xff; /* interrupts enabled for first 8259 */ int int1mask = 0xff; /* interrupts enabled for second 8259 */
1991/0709		/*
1991/0614		* trap/interrupt gates
1991/0727/sys/src/9/pc/trap.c:50,55 – 1991/0731/sys/src/9/pc/trap.c:61,69
1991/0709		if((v&~0x7) == Int0vec){ int0mask &= ~(1<<(v&7)); outb(Int0aux, int0mask);
1991/0731		} else if((v&~0x7) == Int1vec){ int1mask &= ~(1<<(v&7)); outb(Int1aux, int1mask);
1991/0709		}
1991/0703		}
1991/0727/sys/src/9/pc/trap.c:62,67 – 1991/0731/sys/src/9/pc/trap.c:76,87
1991/0703		int i;
1991/0614
1991/0703		/*
1991/0731		* set all interrupts to panics */ for(i = 32; i < 256; i++) sethvec(i, intrbad, SEGIG, 0); /*
1991/0703		* set the standard traps */
1991/0719		sethvec(0, intr0, SEGIG, 0);
1991/0727/sys/src/9/pc/trap.c:80,85 – 1991/0731/sys/src/9/pc/trap.c:100,109
1991/0719		sethvec(13, intr13, SEGIG, 0); sethvec(14, intr14, SEGIG, 0); sethvec(15, intr15, SEGIG, 0);
1991/0731		/* * set the standard devices */
1991/0719		sethvec(16, intr16, SEGIG, 0); sethvec(17, intr17, SEGIG, 0); sethvec(18, intr18, SEGIG, 0);
1991/0727/sys/src/9/pc/trap.c:88,101 – 1991/0731/sys/src/9/pc/trap.c:112,127
1991/0719		sethvec(21, intr21, SEGIG, 0); sethvec(22, intr22, SEGIG, 0); sethvec(23, intr23, SEGIG, 0);
1991/0731		sethvec(24, intr24, SEGIG, 0); sethvec(25, intr25, SEGIG, 0); sethvec(26, intr26, SEGIG, 0); sethvec(27, intr27, SEGIG, 0); sethvec(28, intr28, SEGIG, 0); sethvec(29, intr29, SEGIG, 0); sethvec(30, intr30, SEGIG, 0); sethvec(31, intr31, SEGIG, 0);
1991/0703		/*
1991/0718		* set all others to unknown interrupts
1991/0703		*/
1991/0706		for(i = 24; i < 256; i++)
1991/0710		sethvec(i, intrbad, SEGIG, 0);
1991/0703		/*
1991/0710		* system calls */ sethvec(64, intr64, SEGTG, 3);
1991/0727/sys/src/9/pc/trap.c:115,122 – 1991/0731/sys/src/9/pc/trap.c:141,166
1991/0709		outb(Int0ctl, 0x11); /* ICW1 - edge triggered, master, ICW4 will be sent */ outb(Int0aux, Int0vec); /* ICW2 - interrupt vector offset */
1991/0705		outb(Int0aux, 0x04); /* ICW3 - master level 2 */
1991/0731		outb(Int0aux, 0x04); /* ICW3 - have slave on level 2 */
1991/0709		outb(Int0aux, 0x01); /* ICW4 - 8086 mode, not buffered */
1991/0731		/* * Set up the second 8259 interrupt processor. * Make 8259 interrupts start at CPU vector Int0vec. * Set the 8259 as master with edge triggered * input with fully nested interrupts. */ outb(Int1ctl, 0x11); /* ICW1 - edge triggered, master, ICW4 will be sent */ outb(Int1aux, Int1vec); /* ICW2 - interrupt vector offset */ outb(Int1aux, 0x02); /* ICW3 - I am a slave on level 2 */ outb(Int1aux, 0x01); /* ICW4 - 8086 mode, not buffered */ /* * pass #2 8259 interrupts to #1 */ int0mask &= ~0x04; outb(Int0aux, int0mask);
1991/0703		}
1991/0614		/*
1991/0727/sys/src/9/pc/trap.c:125,143 – 1991/0731/sys/src/9/pc/trap.c:169,196
1991/0710		void
1991/0703		trap(Ureg *ur)
1991/0614		{
1991/0703		if(ur->trap>=256 || ivec[ur->trap] == 0)
1991/0711		panic("bad trap type %d %lux\n", ur->trap, ur->pc);
1991/0731		int v; int c;
1991/0703
1991/0731		v = ur->trap; if(v>=256 || ivec[v] == 0) panic("bad trap type %d %lux\n", v, ur->pc);
1991/0709		/* * call the trap routine */
1991/0703		(*ivec[ur->trap])(ur);
1991/0731		(*ivec[v])(ur);
1991/0709		/* * tell the 8259 that we're done with the * highest level interrupt */ outb(Int0ctl, EOI);
1991/0731		c = v&~0x7; if(c==Int0vec || c==Int1vec){ outb(Int0ctl, EOI); if(c == Int1vec) outb(Int1ctl, EOI); }
1991/0710		} /*
1991/0727/sys/src/9/pc/trap.c:173,220 – 1991/0731/sys/src/9/pc/trap.c:226,232
1991/0718		/*
1991/0710		* system calls */
1991/0720		#undef CHDIR /* BUG */ #include "/sys/src/libc/9syscall/sys.h"                  typedef long Syscall(ulong*); Syscall sysr1, sysfork, sysexec, sysgetpid, syssleep, sysexits, sysdeath, syswait; Syscall sysopen, sysclose, sysread, syswrite, sysseek, syserrstr, sysaccess, sysstat, sysfstat; Syscall sysdup, syschdir, sysforkpgrp, sysbind, sysmount, syspipe, syscreate; Syscall sysbrk_, sysremove, syswstat, sysfwstat, sysnotify, sysnoted, sysalarm;                  Syscall *systab[]={ sysr1, syserrstr, sysbind, syschdir, sysclose, sysdup, sysalarm, sysexec, sysexits, sysfork, sysforkpgrp, sysfstat, sysdeath, sysmount, sysopen, sysread, sysseek, syssleep, sysstat, syswait, syswrite, syspipe, syscreate, sysdeath, sysbrk_, sysremove, syswstat, sysfwstat, sysnotify, sysnoted, sysdeath, /* sysfilsys */ };
1991/0731		#include "../port/systab.h"
1991/0720
1991/0710		long syscall(Ureg *ur)