cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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sun3ints.c (2145B)

      1 /*
      2 * linux/arch/m68k/sun3/sun3ints.c -- Sun-3(x) Linux interrupt handling code
      3 *
      4 * This file is subject to the terms and conditions of the GNU General Public
      5 * License.  See the file COPYING in the main directory of this archive
      6 * for more details.
      7 */
      8
      9#include <linux/types.h>
     10#include <linux/kernel.h>
     11#include <linux/sched.h>
     12#include <linux/kernel_stat.h>
     13#include <linux/interrupt.h>
     14#include <asm/intersil.h>
     15#include <asm/oplib.h>
     16#include <asm/sun3ints.h>
     17#include <asm/irq_regs.h>
     18#include <linux/seq_file.h>
     19
     20extern void sun3_leds (unsigned char);
     21
     22void sun3_disable_interrupts(void)
     23{
     24	sun3_disable_irq(0);
     25}
     26
     27void sun3_enable_interrupts(void)
     28{
     29	sun3_enable_irq(0);
     30}
     31
     32static int led_pattern[8] = {
     33       ~(0x80), ~(0x01),
     34       ~(0x40), ~(0x02),
     35       ~(0x20), ~(0x04),
     36       ~(0x10), ~(0x08)
     37};
     38
     39volatile unsigned char* sun3_intreg;
     40
     41void sun3_enable_irq(unsigned int irq)
     42{
     43	*sun3_intreg |=  (1 << irq);
     44}
     45
     46void sun3_disable_irq(unsigned int irq)
     47{
     48	*sun3_intreg &= ~(1 << irq);
     49}
     50
     51static irqreturn_t sun3_int7(int irq, void *dev_id)
     52{
     53	unsigned int cnt;
     54
     55	cnt = kstat_irqs_cpu(irq, 0);
     56	if (!(cnt % 2000))
     57		sun3_leds(led_pattern[cnt % 16000 / 2000]);
     58	return IRQ_HANDLED;
     59}
     60
     61static irqreturn_t sun3_int5(int irq, void *dev_id)
     62{
     63	unsigned long flags;
     64	unsigned int cnt;
     65
     66	local_irq_save(flags);
     67#ifdef CONFIG_SUN3
     68	intersil_clear();
     69#endif
     70	sun3_disable_irq(5);
     71	sun3_enable_irq(5);
     72#ifdef CONFIG_SUN3
     73	intersil_clear();
     74#endif
     75	legacy_timer_tick(1);
     76	cnt = kstat_irqs_cpu(irq, 0);
     77	if (!(cnt % 20))
     78		sun3_leds(led_pattern[cnt % 160 / 20]);
     79	local_irq_restore(flags);
     80	return IRQ_HANDLED;
     81}
     82
     83static irqreturn_t sun3_vec255(int irq, void *dev_id)
     84{
     85	return IRQ_HANDLED;
     86}
     87
     88void __init sun3_init_IRQ(void)
     89{
     90	*sun3_intreg = 1;
     91
     92	m68k_setup_user_interrupt(VEC_USER, 128);
     93
     94	if (request_irq(IRQ_AUTO_5, sun3_int5, 0, "clock", NULL))
     95		pr_err("Couldn't register %s interrupt\n", "int5");
     96	if (request_irq(IRQ_AUTO_7, sun3_int7, 0, "nmi", NULL))
     97		pr_err("Couldn't register %s interrupt\n", "int7");
     98	if (request_irq(IRQ_USER+127, sun3_vec255, 0, "vec255", NULL))
     99		pr_err("Couldn't register %s interrupt\n", "vec255");
    100}