arch/nds32/lib/interrupts.c

   1 /*
   2  * (C) Copyright 2002
   3  * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
   4  * Alex Zuepke <azu@sysgo.de>
   5  *
   6  * Copyright (C) 2011 Andes Technology Corporation
   7  * Shawn Lin, Andes Technology Corporation <nobuhiro@andestech.com>
   8  * Macpaul Lin, Andes Technology Corporation <macpaul@andestech.com>
   9  *
  10  * SPDX-License-Identifier:     GPL-2.0+
  11  */
  12
  13 #include <common.h>
  14 #include <asm/ptrace.h>
  15 #include <asm/system.h>
  16 #undef INTERRUPT_MODE
  17
  18 static int int_flag;
  19
  20 int irq_flags;          /* needed by asm-nds32/system.h */
  21
  22 int GIE_STATUS(void)
  23 {
  24         int ret;
  25
  26         __asm__ __volatile__ (
  27                 "mfsr   $p0, $psw\n\t"
  28                 "andi   %0, %0, 0x1\n\t"
  29                 : "=r" (ret)
  30                 :
  31                 : "memory"
  32         );
  33         return ret;
  34 }
  35
  36 #ifdef CONFIG_USE_INTERRUPT
  37
  38 /* enable interrupts */
  39 void enable_interrupts(void)
  40 {
  41         local_irq_restore(int_flag);
  42 }
  43
  44 /*
  45  * disable interrupts
  46  * Return true if GIE is enabled before we disable it.
  47  */
  48 int disable_interrupts(void)
  49 {
  50
  51         int gie_ori_status;
  52
  53         gie_ori_status = GIE_STATUS();
  54
  55         local_irq_save(int_flag);
  56
  57         return gie_ori_status;
  58 }
  59 #endif
  60
  61 void bad_mode(void)
  62 {
  63         panic("Resetting CPU ...\n");
  64         reset_cpu(0);
  65 }
  66
  67 void show_regs(struct pt_regs *regs)
  68 {
  69         const char *processor_modes[] = {"USER", "SuperUser" , "HyperVisor"};
  70
  71         printf("\n");
  72         printf("pc : [<%08lx>]  sp: [<%08lx>]\n"
  73                 "lp : %08lx  gp : %08lx  fp : %08lx\n",
  74                 regs->ipc, regs->sp, regs->lp, regs->gp, regs->fp);
  75         printf("D1H: %08lx  D1L: %08lx  D0H: %08lx  D0L: %08lx\n",
  76                 regs->d1hi, regs->d1lo, regs->d0hi, regs->d0lo);
  77         printf("r27: %08lx  r26: %08lx  r25: %08lx  r24: %08lx\n",
  78                 regs->p1, regs->p0, regs->r[25], regs->r[24]);
  79         printf("r23: %08lx  r22: %08lx  r21: %08lx  r20: %08lx\n",
  80                 regs->r[23], regs->r[22], regs->r[21], regs->r[20]);
  81         printf("r19: %08lx  r18: %08lx  r17: %08lx  r16: %08lx\n",
  82                 regs->r[19], regs->r[18], regs->r[17], regs->r[16]);
  83         printf("r15: %08lx  r14: %08lx  r13: %08lx  r12: %08lx\n",
  84                 regs->r[15], regs->r[14], regs->r[13], regs->r[12]);
  85         printf("r11: %08lx  r10: %08lx  r9 : %08lx  r8 : %08lx\n",
  86                 regs->r[11], regs->r[10], regs->r[9], regs->r[8]);
  87         printf("r7 : %08lx  r6 : %08lx  r5 : %08lx  r4 : %08lx\n",
  88                 regs->r[7], regs->r[6], regs->r[5], regs->r[4]);
  89         printf("r3 : %08lx  r2 : %08lx  r1 : %08lx  r0 : %08lx\n",
  90                 regs->r[3], regs->r[2], regs->r[1], regs->r[0]);
  91         printf("  Interrupts %s  Mode %s\n",
  92                 interrupts_enabled(regs) ? "on" : "off",
  93                 processor_modes[processor_mode(regs)]);
  94 }
  95
  96 void do_interruption(struct pt_regs *pt_regs, int EVIC_num)
  97 {
  98         const char *interruption_type[] = {
  99                 "Reset",
 100                 "TLB Fill",
 101                 "TLB Not Present",
 102                 "TLB Misc",
 103                 "VLPT Miss",
 104                 "Cache Parity Error",
 105                 "Debug",
 106                 "General Exception",
 107                 "External Interrupt"
 108         };
 109
 110         printf("%s\n", interruption_type[EVIC_num]);
 111         show_regs(pt_regs);
 112         bad_mode();
 113 }