1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * (C) Copyright 2002
4 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
5 * Alex Zuepke <azu@sysgo.de>
6 *
7 * Copyright (C) 2011 Andes Technology Corporation
8 * Shawn Lin, Andes Technology Corporation <nobuhiro@andestech.com>
9 * Macpaul Lin, Andes Technology Corporation <macpaul@andestech.com>
10 */
11
12 #include <common.h>
13 #include <irq_func.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
GIE_STATUS(void)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
interrupt_init(void)38 int interrupt_init(void)
39 {
40 return 0;
41 }
42 /* enable interrupts */
enable_interrupts(void)43 void enable_interrupts(void)
44 {
45 local_irq_restore(int_flag);
46 }
47
48 /*
49 * disable interrupts
50 * Return true if GIE is enabled before we disable it.
51 */
disable_interrupts(void)52 int disable_interrupts(void)
53 {
54
55 int gie_ori_status;
56
57 gie_ori_status = GIE_STATUS();
58
59 local_irq_save(int_flag);
60
61 return gie_ori_status;
62 }
63 #endif
64
bad_mode(void)65 void bad_mode(void)
66 {
67 panic("Resetting CPU ...\n");
68 reset_cpu(0);
69 }
70
show_regs(struct pt_regs * regs)71 void show_regs(struct pt_regs *regs)
72 {
73 const char *processor_modes[] = {"USER", "SuperUser" , "HyperVisor"};
74
75 printf("\n");
76 printf("pc : [<%08lx>] sp: [<%08lx>]\n"
77 "lp : %08lx gp : %08lx fp : %08lx\n",
78 regs->ipc, regs->sp, regs->lp, regs->gp, regs->fp);
79 printf("D1H: %08lx D1L: %08lx D0H: %08lx D0L: %08lx\n",
80 regs->d1hi, regs->d1lo, regs->d0hi, regs->d0lo);
81 printf("r27: %08lx r26: %08lx r25: %08lx r24: %08lx\n",
82 regs->p1, regs->p0, regs->r[25], regs->r[24]);
83 printf("r23: %08lx r22: %08lx r21: %08lx r20: %08lx\n",
84 regs->r[23], regs->r[22], regs->r[21], regs->r[20]);
85 printf("r19: %08lx r18: %08lx r17: %08lx r16: %08lx\n",
86 regs->r[19], regs->r[18], regs->r[17], regs->r[16]);
87 printf("r15: %08lx r14: %08lx r13: %08lx r12: %08lx\n",
88 regs->r[15], regs->r[14], regs->r[13], regs->r[12]);
89 printf("r11: %08lx r10: %08lx r9 : %08lx r8 : %08lx\n",
90 regs->r[11], regs->r[10], regs->r[9], regs->r[8]);
91 printf("r7 : %08lx r6 : %08lx r5 : %08lx r4 : %08lx\n",
92 regs->r[7], regs->r[6], regs->r[5], regs->r[4]);
93 printf("r3 : %08lx r2 : %08lx r1 : %08lx r0 : %08lx\n",
94 regs->r[3], regs->r[2], regs->r[1], regs->r[0]);
95 printf(" Interrupts %s Mode %s\n",
96 interrupts_enabled(regs) ? "on" : "off",
97 processor_modes[processor_mode(regs)]);
98 }
99
do_interruption(struct pt_regs * pt_regs,int EVIC_num)100 void do_interruption(struct pt_regs *pt_regs, int EVIC_num)
101 {
102 const char *interruption_type[] = {
103 "Reset",
104 "TLB Fill",
105 "TLB Not Present",
106 "TLB Misc",
107 "VLPT Miss",
108 "Cache Parity Error",
109 "Debug",
110 "General Exception",
111 "External Interrupt"
112 };
113
114 printf("%s\n", interruption_type[EVIC_num]);
115 show_regs(pt_regs);
116 bad_mode();
117 }
118