Split of architecture-dependent and -independent functions for i386,
mainly in the kernel and headers. This split based on work by
Ingmar Alting <iaalting@cs.vu.nl> done for his Minix PowerPC architecture
port.
. kernel does not program the interrupt controller directly, do any
other architecture-dependent operations, or contain assembly any more,
but uses architecture-dependent functions in arch/$(ARCH)/.
. architecture-dependent constants and types defined in arch/$(ARCH)/include.
. <ibm/portio.h> moved to <minix/portio.h>, as they have become, for now,
architecture-independent functions.
. int86, sdevio, readbios, and iopenable are now i386-specific kernel calls
and live in arch/i386/do_* now.
. i386 arch now supports even less 86 code; e.g. mpx86.s and klib86.s have
gone, and 'machine.protected' is gone (and always taken to be 1 in i386).
If 86 support is to return, it should be a new architecture.
. prototypes for the architecture-dependent functions defined in
kernel/arch/$(ARCH)/*.c but used in kernel/ are in kernel/proto.h
. /etc/make.conf included in makefiles and shell scripts that need to
know the building architecture; it defines ARCH=<arch>, currently only
i386.
. some basic per-architecture build support outside of the kernel (lib)
. in clock.c, only dequeue a process if it was ready
. fixes for new include files
files deleted:
. mpx/klib.s - only for choosing between mpx/klib86 and -386
. klib86.s - only for 86
i386-specific files files moved (or arch-dependent stuff moved) to arch/i386/:
. mpx386.s (entry point)
. klib386.s
. sconst.h
. exception.c
. protect.c
. protect.h
. i8269.c
2006-12-22 16:22:27 +01:00
|
|
|
/* This file contains routines for initializing the 8259 interrupt controller:
|
|
|
|
* put_irq_handler: register an interrupt handler
|
|
|
|
* rm_irq_handler: deregister an interrupt handler
|
|
|
|
* intr_handle: handle a hardware interrupt
|
|
|
|
* intr_init: initialize the interrupt controller(s)
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include "../../kernel.h"
|
|
|
|
#include "../../proc.h"
|
|
|
|
#include "proto.h"
|
|
|
|
#include <minix/com.h>
|
|
|
|
#include <minix/portio.h>
|
|
|
|
#include <ibm/cpu.h>
|
|
|
|
|
|
|
|
#define ICW1_AT 0x11 /* edge triggered, cascade, need ICW4 */
|
|
|
|
#define ICW1_PC 0x13 /* edge triggered, no cascade, need ICW4 */
|
|
|
|
#define ICW1_PS 0x19 /* level triggered, cascade, need ICW4 */
|
|
|
|
#define ICW4_AT_SLAVE 0x01 /* not SFNM, not buffered, normal EOI, 8086 */
|
|
|
|
#define ICW4_AT_MASTER 0x05 /* not SFNM, not buffered, normal EOI, 8086 */
|
|
|
|
#define ICW4_PC_SLAVE 0x09 /* not SFNM, buffered, normal EOI, 8086 */
|
|
|
|
#define ICW4_PC_MASTER 0x0D /* not SFNM, buffered, normal EOI, 8086 */
|
2009-11-16 22:41:44 +01:00
|
|
|
#define ICW4_AT_AEOI_SLAVE 0x03 /* not SFNM, not buffered, auto EOI, 8086 */
|
|
|
|
#define ICW4_AT_AEOI_MASTER 0x07 /* not SFNM, not buffered, auto EOI, 8086 */
|
|
|
|
#define ICW4_PC_AEOI_SLAVE 0x0B /* not SFNM, buffered, auto EOI, 8086 */
|
|
|
|
#define ICW4_PC_AEOI_MASTER 0x0F /* not SFNM, buffered, auto EOI, 8086 */
|
Split of architecture-dependent and -independent functions for i386,
mainly in the kernel and headers. This split based on work by
Ingmar Alting <iaalting@cs.vu.nl> done for his Minix PowerPC architecture
port.
. kernel does not program the interrupt controller directly, do any
other architecture-dependent operations, or contain assembly any more,
but uses architecture-dependent functions in arch/$(ARCH)/.
. architecture-dependent constants and types defined in arch/$(ARCH)/include.
. <ibm/portio.h> moved to <minix/portio.h>, as they have become, for now,
architecture-independent functions.
. int86, sdevio, readbios, and iopenable are now i386-specific kernel calls
and live in arch/i386/do_* now.
. i386 arch now supports even less 86 code; e.g. mpx86.s and klib86.s have
gone, and 'machine.protected' is gone (and always taken to be 1 in i386).
If 86 support is to return, it should be a new architecture.
. prototypes for the architecture-dependent functions defined in
kernel/arch/$(ARCH)/*.c but used in kernel/ are in kernel/proto.h
. /etc/make.conf included in makefiles and shell scripts that need to
know the building architecture; it defines ARCH=<arch>, currently only
i386.
. some basic per-architecture build support outside of the kernel (lib)
. in clock.c, only dequeue a process if it was ready
. fixes for new include files
files deleted:
. mpx/klib.s - only for choosing between mpx/klib86 and -386
. klib86.s - only for 86
i386-specific files files moved (or arch-dependent stuff moved) to arch/i386/:
. mpx386.s (entry point)
. klib386.s
. sconst.h
. exception.c
. protect.c
. protect.h
. i8269.c
2006-12-22 16:22:27 +01:00
|
|
|
|
|
|
|
#define set_vec(nr, addr) ((void)0)
|
|
|
|
|
|
|
|
/*===========================================================================*
|
|
|
|
* intr_init *
|
|
|
|
*===========================================================================*/
|
2009-11-16 22:41:44 +01:00
|
|
|
PUBLIC int intr_init(int mine, int auto_eoi)
|
Split of architecture-dependent and -independent functions for i386,
mainly in the kernel and headers. This split based on work by
Ingmar Alting <iaalting@cs.vu.nl> done for his Minix PowerPC architecture
port.
. kernel does not program the interrupt controller directly, do any
other architecture-dependent operations, or contain assembly any more,
but uses architecture-dependent functions in arch/$(ARCH)/.
. architecture-dependent constants and types defined in arch/$(ARCH)/include.
. <ibm/portio.h> moved to <minix/portio.h>, as they have become, for now,
architecture-independent functions.
. int86, sdevio, readbios, and iopenable are now i386-specific kernel calls
and live in arch/i386/do_* now.
. i386 arch now supports even less 86 code; e.g. mpx86.s and klib86.s have
gone, and 'machine.protected' is gone (and always taken to be 1 in i386).
If 86 support is to return, it should be a new architecture.
. prototypes for the architecture-dependent functions defined in
kernel/arch/$(ARCH)/*.c but used in kernel/ are in kernel/proto.h
. /etc/make.conf included in makefiles and shell scripts that need to
know the building architecture; it defines ARCH=<arch>, currently only
i386.
. some basic per-architecture build support outside of the kernel (lib)
. in clock.c, only dequeue a process if it was ready
. fixes for new include files
files deleted:
. mpx/klib.s - only for choosing between mpx/klib86 and -386
. klib86.s - only for 86
i386-specific files files moved (or arch-dependent stuff moved) to arch/i386/:
. mpx386.s (entry point)
. klib386.s
. sconst.h
. exception.c
. protect.c
. protect.h
. i8269.c
2006-12-22 16:22:27 +01:00
|
|
|
{
|
|
|
|
/* Initialize the 8259s, finishing with all interrupts disabled. This is
|
|
|
|
* only done in protected mode, in real mode we don't touch the 8259s, but
|
|
|
|
* use the BIOS locations instead. The flag "mine" is set if the 8259s are
|
|
|
|
* to be programmed for MINIX, or to be reset to what the BIOS expects.
|
|
|
|
*/
|
|
|
|
int i;
|
|
|
|
|
2009-11-16 22:41:44 +01:00
|
|
|
if (!intr_disabled())
|
|
|
|
intr_disable();
|
Split of architecture-dependent and -independent functions for i386,
mainly in the kernel and headers. This split based on work by
Ingmar Alting <iaalting@cs.vu.nl> done for his Minix PowerPC architecture
port.
. kernel does not program the interrupt controller directly, do any
other architecture-dependent operations, or contain assembly any more,
but uses architecture-dependent functions in arch/$(ARCH)/.
. architecture-dependent constants and types defined in arch/$(ARCH)/include.
. <ibm/portio.h> moved to <minix/portio.h>, as they have become, for now,
architecture-independent functions.
. int86, sdevio, readbios, and iopenable are now i386-specific kernel calls
and live in arch/i386/do_* now.
. i386 arch now supports even less 86 code; e.g. mpx86.s and klib86.s have
gone, and 'machine.protected' is gone (and always taken to be 1 in i386).
If 86 support is to return, it should be a new architecture.
. prototypes for the architecture-dependent functions defined in
kernel/arch/$(ARCH)/*.c but used in kernel/ are in kernel/proto.h
. /etc/make.conf included in makefiles and shell scripts that need to
know the building architecture; it defines ARCH=<arch>, currently only
i386.
. some basic per-architecture build support outside of the kernel (lib)
. in clock.c, only dequeue a process if it was ready
. fixes for new include files
files deleted:
. mpx/klib.s - only for choosing between mpx/klib86 and -386
. klib86.s - only for 86
i386-specific files files moved (or arch-dependent stuff moved) to arch/i386/:
. mpx386.s (entry point)
. klib386.s
. sconst.h
. exception.c
. protect.c
. protect.h
. i8269.c
2006-12-22 16:22:27 +01:00
|
|
|
|
|
|
|
/* The AT and newer PS/2 have two interrupt controllers, one master,
|
|
|
|
* one slaved at IRQ 2. (We don't have to deal with the PC that
|
|
|
|
* has just one controller, because it must run in real mode.)
|
|
|
|
*/
|
|
|
|
outb( INT_CTL, machine.ps_mca ? ICW1_PS : ICW1_AT);
|
2009-11-16 22:41:44 +01:00
|
|
|
outb( INT_CTLMASK, mine == INTS_MINIX ? IRQ0_VECTOR : BIOS_IRQ0_VEC);
|
Split of architecture-dependent and -independent functions for i386,
mainly in the kernel and headers. This split based on work by
Ingmar Alting <iaalting@cs.vu.nl> done for his Minix PowerPC architecture
port.
. kernel does not program the interrupt controller directly, do any
other architecture-dependent operations, or contain assembly any more,
but uses architecture-dependent functions in arch/$(ARCH)/.
. architecture-dependent constants and types defined in arch/$(ARCH)/include.
. <ibm/portio.h> moved to <minix/portio.h>, as they have become, for now,
architecture-independent functions.
. int86, sdevio, readbios, and iopenable are now i386-specific kernel calls
and live in arch/i386/do_* now.
. i386 arch now supports even less 86 code; e.g. mpx86.s and klib86.s have
gone, and 'machine.protected' is gone (and always taken to be 1 in i386).
If 86 support is to return, it should be a new architecture.
. prototypes for the architecture-dependent functions defined in
kernel/arch/$(ARCH)/*.c but used in kernel/ are in kernel/proto.h
. /etc/make.conf included in makefiles and shell scripts that need to
know the building architecture; it defines ARCH=<arch>, currently only
i386.
. some basic per-architecture build support outside of the kernel (lib)
. in clock.c, only dequeue a process if it was ready
. fixes for new include files
files deleted:
. mpx/klib.s - only for choosing between mpx/klib86 and -386
. klib86.s - only for 86
i386-specific files files moved (or arch-dependent stuff moved) to arch/i386/:
. mpx386.s (entry point)
. klib386.s
. sconst.h
. exception.c
. protect.c
. protect.h
. i8269.c
2006-12-22 16:22:27 +01:00
|
|
|
/* ICW2 for master */
|
|
|
|
outb( INT_CTLMASK, (1 << CASCADE_IRQ));
|
|
|
|
/* ICW3 tells slaves */
|
2009-11-16 22:41:44 +01:00
|
|
|
if (auto_eoi)
|
|
|
|
outb( INT_CTLMASK, ICW4_AT_AEOI_MASTER);
|
|
|
|
else
|
|
|
|
outb( INT_CTLMASK, ICW4_AT_MASTER);
|
Split of architecture-dependent and -independent functions for i386,
mainly in the kernel and headers. This split based on work by
Ingmar Alting <iaalting@cs.vu.nl> done for his Minix PowerPC architecture
port.
. kernel does not program the interrupt controller directly, do any
other architecture-dependent operations, or contain assembly any more,
but uses architecture-dependent functions in arch/$(ARCH)/.
. architecture-dependent constants and types defined in arch/$(ARCH)/include.
. <ibm/portio.h> moved to <minix/portio.h>, as they have become, for now,
architecture-independent functions.
. int86, sdevio, readbios, and iopenable are now i386-specific kernel calls
and live in arch/i386/do_* now.
. i386 arch now supports even less 86 code; e.g. mpx86.s and klib86.s have
gone, and 'machine.protected' is gone (and always taken to be 1 in i386).
If 86 support is to return, it should be a new architecture.
. prototypes for the architecture-dependent functions defined in
kernel/arch/$(ARCH)/*.c but used in kernel/ are in kernel/proto.h
. /etc/make.conf included in makefiles and shell scripts that need to
know the building architecture; it defines ARCH=<arch>, currently only
i386.
. some basic per-architecture build support outside of the kernel (lib)
. in clock.c, only dequeue a process if it was ready
. fixes for new include files
files deleted:
. mpx/klib.s - only for choosing between mpx/klib86 and -386
. klib86.s - only for 86
i386-specific files files moved (or arch-dependent stuff moved) to arch/i386/:
. mpx386.s (entry point)
. klib386.s
. sconst.h
. exception.c
. protect.c
. protect.h
. i8269.c
2006-12-22 16:22:27 +01:00
|
|
|
outb( INT_CTLMASK, ~(1 << CASCADE_IRQ)); /* IRQ 0-7 mask */
|
|
|
|
outb( INT2_CTL, machine.ps_mca ? ICW1_PS : ICW1_AT);
|
2009-11-16 22:41:44 +01:00
|
|
|
outb( INT2_CTLMASK, mine == INTS_MINIX ? IRQ8_VECTOR : BIOS_IRQ8_VEC);
|
Split of architecture-dependent and -independent functions for i386,
mainly in the kernel and headers. This split based on work by
Ingmar Alting <iaalting@cs.vu.nl> done for his Minix PowerPC architecture
port.
. kernel does not program the interrupt controller directly, do any
other architecture-dependent operations, or contain assembly any more,
but uses architecture-dependent functions in arch/$(ARCH)/.
. architecture-dependent constants and types defined in arch/$(ARCH)/include.
. <ibm/portio.h> moved to <minix/portio.h>, as they have become, for now,
architecture-independent functions.
. int86, sdevio, readbios, and iopenable are now i386-specific kernel calls
and live in arch/i386/do_* now.
. i386 arch now supports even less 86 code; e.g. mpx86.s and klib86.s have
gone, and 'machine.protected' is gone (and always taken to be 1 in i386).
If 86 support is to return, it should be a new architecture.
. prototypes for the architecture-dependent functions defined in
kernel/arch/$(ARCH)/*.c but used in kernel/ are in kernel/proto.h
. /etc/make.conf included in makefiles and shell scripts that need to
know the building architecture; it defines ARCH=<arch>, currently only
i386.
. some basic per-architecture build support outside of the kernel (lib)
. in clock.c, only dequeue a process if it was ready
. fixes for new include files
files deleted:
. mpx/klib.s - only for choosing between mpx/klib86 and -386
. klib86.s - only for 86
i386-specific files files moved (or arch-dependent stuff moved) to arch/i386/:
. mpx386.s (entry point)
. klib386.s
. sconst.h
. exception.c
. protect.c
. protect.h
. i8269.c
2006-12-22 16:22:27 +01:00
|
|
|
/* ICW2 for slave */
|
|
|
|
outb( INT2_CTLMASK, CASCADE_IRQ); /* ICW3 is slave nr */
|
2009-11-16 22:41:44 +01:00
|
|
|
if (auto_eoi)
|
|
|
|
outb( INT2_CTLMASK, ICW4_AT_AEOI_SLAVE);
|
|
|
|
else
|
|
|
|
outb( INT2_CTLMASK, ICW4_AT_SLAVE);
|
Split of architecture-dependent and -independent functions for i386,
mainly in the kernel and headers. This split based on work by
Ingmar Alting <iaalting@cs.vu.nl> done for his Minix PowerPC architecture
port.
. kernel does not program the interrupt controller directly, do any
other architecture-dependent operations, or contain assembly any more,
but uses architecture-dependent functions in arch/$(ARCH)/.
. architecture-dependent constants and types defined in arch/$(ARCH)/include.
. <ibm/portio.h> moved to <minix/portio.h>, as they have become, for now,
architecture-independent functions.
. int86, sdevio, readbios, and iopenable are now i386-specific kernel calls
and live in arch/i386/do_* now.
. i386 arch now supports even less 86 code; e.g. mpx86.s and klib86.s have
gone, and 'machine.protected' is gone (and always taken to be 1 in i386).
If 86 support is to return, it should be a new architecture.
. prototypes for the architecture-dependent functions defined in
kernel/arch/$(ARCH)/*.c but used in kernel/ are in kernel/proto.h
. /etc/make.conf included in makefiles and shell scripts that need to
know the building architecture; it defines ARCH=<arch>, currently only
i386.
. some basic per-architecture build support outside of the kernel (lib)
. in clock.c, only dequeue a process if it was ready
. fixes for new include files
files deleted:
. mpx/klib.s - only for choosing between mpx/klib86 and -386
. klib86.s - only for 86
i386-specific files files moved (or arch-dependent stuff moved) to arch/i386/:
. mpx386.s (entry point)
. klib386.s
. sconst.h
. exception.c
. protect.c
. protect.h
. i8269.c
2006-12-22 16:22:27 +01:00
|
|
|
outb( INT2_CTLMASK, ~0); /* IRQ 8-15 mask */
|
|
|
|
|
|
|
|
/* Copy the BIOS vectors from the BIOS to the Minix location, so we
|
|
|
|
* can still make BIOS calls without reprogramming the i8259s.
|
|
|
|
*/
|
|
|
|
#if IRQ0_VECTOR != BIOS_IRQ0_VEC
|
|
|
|
phys_copy(BIOS_VECTOR(0) * 4L, VECTOR(0) * 4L, 8 * 4L);
|
|
|
|
#endif
|
|
|
|
#if IRQ8_VECTOR != BIOS_IRQ8_VEC
|
|
|
|
phys_copy(BIOS_VECTOR(8) * 4L, VECTOR(8) * 4L, 8 * 4L);
|
|
|
|
#endif
|
|
|
|
|
|
|
|
return OK;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*===========================================================================*
|
|
|
|
* intr_disabled *
|
|
|
|
*===========================================================================*/
|
|
|
|
PUBLIC int intr_disabled(void)
|
|
|
|
{
|
|
|
|
if(!(read_cpu_flags() & X86_FLAG_I))
|
|
|
|
return 1;
|
|
|
|
return 0;
|
|
|
|
}
|
2009-11-04 14:24:56 +01:00
|
|
|
|
|
|
|
PUBLIC void irq_8259_unmask(int irq)
|
|
|
|
{
|
|
|
|
unsigned ctl_mask = irq < 8 ? INT_CTLMASK : INT2_CTLMASK;
|
|
|
|
outb(ctl_mask, inb(ctl_mask) & ~(1 << (irq & 0x7)));
|
|
|
|
}
|
|
|
|
|
|
|
|
PUBLIC void irq_8259_mask(int irq)
|
|
|
|
{
|
|
|
|
unsigned ctl_mask = irq < 8 ? INT_CTLMASK : INT2_CTLMASK;
|
|
|
|
outb(ctl_mask, inb(ctl_mask) | (1 << (irq & 0x7)));
|
|
|
|
}
|
2009-11-16 22:41:44 +01:00
|
|
|
|
|
|
|
/* Disable 8259 - write 0xFF in OCW1 master and slave. */
|
|
|
|
PUBLIC void i8259_disable(void)
|
|
|
|
{
|
|
|
|
outb(INT2_CTLMASK, 0xFF);
|
|
|
|
outb(INT_CTLMASK, 0xFF);
|
|
|
|
inb(INT_CTLMASK);
|
|
|
|
}
|
|
|
|
|