mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-15 00:04:15 +08:00
18cb3faf6f
The non-mmu 68000 specific code is inconsistently placed under a directory named "platform". Move it to arch/m68k/ along with the other platform and machine directories. Signed-off-by: Greg Ungerer <gerg@uclinux.org> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
187 lines
4.2 KiB
C
187 lines
4.2 KiB
C
/*
|
|
* ints.c - Generic interrupt controller support
|
|
*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file COPYING in the main directory of this archive
|
|
* for more details.
|
|
*
|
|
* Copyright 1996 Roman Zippel
|
|
* Copyright 1999 D. Jeff Dionne <jeff@rt-control.com>
|
|
*/
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/irq.h>
|
|
#include <asm/traps.h>
|
|
#include <asm/io.h>
|
|
#include <asm/machdep.h>
|
|
|
|
#if defined(CONFIG_M68328)
|
|
#include <asm/MC68328.h>
|
|
#elif defined(CONFIG_M68EZ328)
|
|
#include <asm/MC68EZ328.h>
|
|
#elif defined(CONFIG_M68VZ328)
|
|
#include <asm/MC68VZ328.h>
|
|
#endif
|
|
|
|
/* assembler routines */
|
|
asmlinkage void system_call(void);
|
|
asmlinkage void buserr(void);
|
|
asmlinkage void trap(void);
|
|
asmlinkage void trap3(void);
|
|
asmlinkage void trap4(void);
|
|
asmlinkage void trap5(void);
|
|
asmlinkage void trap6(void);
|
|
asmlinkage void trap7(void);
|
|
asmlinkage void trap8(void);
|
|
asmlinkage void trap9(void);
|
|
asmlinkage void trap10(void);
|
|
asmlinkage void trap11(void);
|
|
asmlinkage void trap12(void);
|
|
asmlinkage void trap13(void);
|
|
asmlinkage void trap14(void);
|
|
asmlinkage void trap15(void);
|
|
asmlinkage void trap33(void);
|
|
asmlinkage void trap34(void);
|
|
asmlinkage void trap35(void);
|
|
asmlinkage void trap36(void);
|
|
asmlinkage void trap37(void);
|
|
asmlinkage void trap38(void);
|
|
asmlinkage void trap39(void);
|
|
asmlinkage void trap40(void);
|
|
asmlinkage void trap41(void);
|
|
asmlinkage void trap42(void);
|
|
asmlinkage void trap43(void);
|
|
asmlinkage void trap44(void);
|
|
asmlinkage void trap45(void);
|
|
asmlinkage void trap46(void);
|
|
asmlinkage void trap47(void);
|
|
asmlinkage irqreturn_t bad_interrupt(int, void *);
|
|
asmlinkage irqreturn_t inthandler(void);
|
|
asmlinkage irqreturn_t inthandler1(void);
|
|
asmlinkage irqreturn_t inthandler2(void);
|
|
asmlinkage irqreturn_t inthandler3(void);
|
|
asmlinkage irqreturn_t inthandler4(void);
|
|
asmlinkage irqreturn_t inthandler5(void);
|
|
asmlinkage irqreturn_t inthandler6(void);
|
|
asmlinkage irqreturn_t inthandler7(void);
|
|
|
|
/* The 68k family did not have a good way to determine the source
|
|
* of interrupts until later in the family. The EC000 core does
|
|
* not provide the vector number on the stack, we vector everything
|
|
* into one vector and look in the blasted mask register...
|
|
* This code is designed to be fast, almost constant time, not clean!
|
|
*/
|
|
void process_int(int vec, struct pt_regs *fp)
|
|
{
|
|
int irq;
|
|
int mask;
|
|
|
|
unsigned long pend = ISR;
|
|
|
|
while (pend) {
|
|
if (pend & 0x0000ffff) {
|
|
if (pend & 0x000000ff) {
|
|
if (pend & 0x0000000f) {
|
|
mask = 0x00000001;
|
|
irq = 0;
|
|
} else {
|
|
mask = 0x00000010;
|
|
irq = 4;
|
|
}
|
|
} else {
|
|
if (pend & 0x00000f00) {
|
|
mask = 0x00000100;
|
|
irq = 8;
|
|
} else {
|
|
mask = 0x00001000;
|
|
irq = 12;
|
|
}
|
|
}
|
|
} else {
|
|
if (pend & 0x00ff0000) {
|
|
if (pend & 0x000f0000) {
|
|
mask = 0x00010000;
|
|
irq = 16;
|
|
} else {
|
|
mask = 0x00100000;
|
|
irq = 20;
|
|
}
|
|
} else {
|
|
if (pend & 0x0f000000) {
|
|
mask = 0x01000000;
|
|
irq = 24;
|
|
} else {
|
|
mask = 0x10000000;
|
|
irq = 28;
|
|
}
|
|
}
|
|
}
|
|
|
|
while (! (mask & pend)) {
|
|
mask <<=1;
|
|
irq++;
|
|
}
|
|
|
|
do_IRQ(irq, fp);
|
|
pend &= ~mask;
|
|
}
|
|
}
|
|
|
|
static void intc_irq_unmask(struct irq_data *d)
|
|
{
|
|
IMR &= ~(1 << d->irq);
|
|
}
|
|
|
|
static void intc_irq_mask(struct irq_data *d)
|
|
{
|
|
IMR |= (1 << d->irq);
|
|
}
|
|
|
|
static struct irq_chip intc_irq_chip = {
|
|
.name = "M68K-INTC",
|
|
.irq_mask = intc_irq_mask,
|
|
.irq_unmask = intc_irq_unmask,
|
|
};
|
|
|
|
/*
|
|
* This function should be called during kernel startup to initialize
|
|
* the machine vector table.
|
|
*/
|
|
void __init trap_init(void)
|
|
{
|
|
int i;
|
|
|
|
/* set up the vectors */
|
|
for (i = 72; i < 256; ++i)
|
|
_ramvec[i] = (e_vector) bad_interrupt;
|
|
|
|
_ramvec[32] = system_call;
|
|
|
|
_ramvec[65] = (e_vector) inthandler1;
|
|
_ramvec[66] = (e_vector) inthandler2;
|
|
_ramvec[67] = (e_vector) inthandler3;
|
|
_ramvec[68] = (e_vector) inthandler4;
|
|
_ramvec[69] = (e_vector) inthandler5;
|
|
_ramvec[70] = (e_vector) inthandler6;
|
|
_ramvec[71] = (e_vector) inthandler7;
|
|
}
|
|
|
|
void __init init_IRQ(void)
|
|
{
|
|
int i;
|
|
|
|
IVR = 0x40; /* Set DragonBall IVR (interrupt base) to 64 */
|
|
|
|
/* turn off all interrupts */
|
|
IMR = ~0;
|
|
|
|
for (i = 0; (i < NR_IRQS); i++) {
|
|
irq_set_chip(i, &intc_irq_chip);
|
|
irq_set_handler(i, handle_level_irq);
|
|
}
|
|
}
|
|
|