arch/hexagon/kernel/vm_events.c

   1 /*
   2  * Mostly IRQ support for Hexagon
   3  *
   4  * Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 and
   8  * only version 2 as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  18  * 02110-1301, USA.
  19  */
  20
  21 #include <linux/kernel.h>
  22 #include <asm/registers.h>
  23 #include <linux/irq.h>
  24 #include <linux/hardirq.h>
  25 #include <asm/system.h>
  26
  27 /*
  28  * show_regs - print pt_regs structure
  29  * @regs: pointer to pt_regs
  30  *
  31  * To-do:  add all the accessor definitions to registers.h
  32  *
  33  * Will make this routine a lot easier to write.
  34  */
  35 void show_regs(struct pt_regs *regs)
  36 {
  37         printk(KERN_EMERG "restart_r0: \t0x%08lx   syscall_nr: %ld\n",
  38                regs->restart_r0, regs->syscall_nr);
  39         printk(KERN_EMERG "preds: \t\t0x%08lx\n", regs->preds);
  40         printk(KERN_EMERG "lc0: \t0x%08lx   sa0: 0x%08lx   m0:  0x%08lx\n",
  41                regs->lc0, regs->sa0, regs->m0);
  42         printk(KERN_EMERG "lc1: \t0x%08lx   sa1: 0x%08lx   m1:  0x%08lx\n",
  43                regs->lc1, regs->sa1, regs->m1);
  44         printk(KERN_EMERG "gp: \t0x%08lx   ugp: 0x%08lx   usr: 0x%08lx\n",
  45                regs->gp, regs->ugp, regs->usr);
  46         printk(KERN_EMERG "r0: \t0x%08lx %08lx %08lx %08lx\n", regs->r00,
  47                 regs->r01,
  48                 regs->r02,
  49                 regs->r03);
  50         printk(KERN_EMERG "r4:  \t0x%08lx %08lx %08lx %08lx\n", regs->r04,
  51                 regs->r05,
  52                 regs->r06,
  53                 regs->r07);
  54         printk(KERN_EMERG "r8:  \t0x%08lx %08lx %08lx %08lx\n", regs->r08,
  55                 regs->r09,
  56                 regs->r10,
  57                 regs->r11);
  58         printk(KERN_EMERG "r12: \t0x%08lx %08lx %08lx %08lx\n", regs->r12,
  59                 regs->r13,
  60                 regs->r14,
  61                 regs->r15);
  62         printk(KERN_EMERG "r16: \t0x%08lx %08lx %08lx %08lx\n", regs->r16,
  63                 regs->r17,
  64                 regs->r18,
  65                 regs->r19);
  66         printk(KERN_EMERG "r20: \t0x%08lx %08lx %08lx %08lx\n", regs->r20,
  67                 regs->r21,
  68                 regs->r22,
  69                 regs->r23);
  70         printk(KERN_EMERG "r24: \t0x%08lx %08lx %08lx %08lx\n", regs->r24,
  71                 regs->r25,
  72                 regs->r26,
  73                 regs->r27);
  74         printk(KERN_EMERG "r28: \t0x%08lx %08lx %08lx %08lx\n", regs->r28,
  75                 regs->r29,
  76                 regs->r30,
  77                 regs->r31);
  78
  79         printk(KERN_EMERG "elr: \t0x%08lx   cause: 0x%08lx   user_mode: %d\n",
  80                 pt_elr(regs), pt_cause(regs), user_mode(regs));
  81         printk(KERN_EMERG "psp: \t0x%08lx   badva: 0x%08lx   int_enabled: %d\n",
  82                 pt_psp(regs), pt_badva(regs), ints_enabled(regs));
  83 }
  84
  85 void dummy_handler(struct pt_regs *regs)
  86 {
  87         unsigned int elr = pt_elr(regs);
  88         printk(KERN_ERR "Unimplemented handler; ELR=0x%08x\n", elr);
  89 }
  90
  91
  92 void arch_do_IRQ(struct pt_regs *regs)
  93 {
  94         int irq = pt_cause(regs);
  95         struct pt_regs *old_regs = set_irq_regs(regs);
  96
  97         irq_enter();
  98         generic_handle_irq(irq);
  99         irq_exit();
 100         set_irq_regs(old_regs);
 101 }