1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * (C) Copyright 2003
4 * Texas Instruments <www.ti.com>
5 *
6 * (C) Copyright 2002
7 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
8 * Marius Groeger <mgroeger@sysgo.de>
9 *
10 * (C) Copyright 2002
11 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
12 * Alex Zuepke <azu@sysgo.de>
13 *
14 * (C) Copyright 2002-2004
15 * Gary Jennejohn, DENX Software Engineering, <garyj@denx.de>
16 *
17 * (C) Copyright 2004
18 * Philippe Robin, ARM Ltd. <philippe.robin@arm.com>
19 */
20
21 #include <common.h>
22 #include <efi_loader.h>
23 #include <asm/proc-armv/ptrace.h>
24 #include <asm/u-boot-arm.h>
25
26 DECLARE_GLOBAL_DATA_PTR;
27
interrupt_init(void)28 int interrupt_init (void)
29 {
30 /*
31 * setup up stacks if necessary
32 */
33 IRQ_STACK_START_IN = gd->irq_sp + 8;
34
35 return 0;
36 }
37
enable_interrupts(void)38 void enable_interrupts (void)
39 {
40 return;
41 }
disable_interrupts(void)42 int disable_interrupts (void)
43 {
44 return 0;
45 }
46
bad_mode(void)47 void bad_mode (void)
48 {
49 panic ("Resetting CPU ...\n");
50 reset_cpu (0);
51 }
52
show_efi_loaded_images(struct pt_regs * regs)53 static void show_efi_loaded_images(struct pt_regs *regs)
54 {
55 efi_print_image_infos((void *)instruction_pointer(regs));
56 }
57
dump_instr(struct pt_regs * regs)58 static void dump_instr(struct pt_regs *regs)
59 {
60 unsigned long addr = instruction_pointer(regs);
61 const int thumb = thumb_mode(regs);
62 const int width = thumb ? 4 : 8;
63 int i;
64
65 if (thumb)
66 addr &= ~1L;
67 else
68 addr &= ~3L;
69 printf("Code: ");
70 for (i = -4; i < 1 + !!thumb; i++) {
71 unsigned int val;
72
73 if (thumb)
74 val = ((u16 *)addr)[i];
75 else
76 val = ((u32 *)addr)[i];
77 printf(i == 0 ? "(%0*x) " : "%0*x ", width, val);
78 }
79 printf("\n");
80 }
81
show_regs(struct pt_regs * regs)82 void show_regs (struct pt_regs *regs)
83 {
84 unsigned long __maybe_unused flags;
85 const char __maybe_unused *processor_modes[] = {
86 "USER_26", "FIQ_26", "IRQ_26", "SVC_26",
87 "UK4_26", "UK5_26", "UK6_26", "UK7_26",
88 "UK8_26", "UK9_26", "UK10_26", "UK11_26",
89 "UK12_26", "UK13_26", "UK14_26", "UK15_26",
90 "USER_32", "FIQ_32", "IRQ_32", "SVC_32",
91 "UK4_32", "UK5_32", "UK6_32", "ABT_32",
92 "UK8_32", "UK9_32", "HYP_32", "UND_32",
93 "UK12_32", "UK13_32", "UK14_32", "SYS_32",
94 };
95
96 flags = condition_codes (regs);
97
98 printf("pc : [<%08lx>] lr : [<%08lx>]\n",
99 instruction_pointer(regs), regs->ARM_lr);
100 if (gd->flags & GD_FLG_RELOC) {
101 printf("reloc pc : [<%08lx>] lr : [<%08lx>]\n",
102 instruction_pointer(regs) - gd->reloc_off,
103 regs->ARM_lr - gd->reloc_off);
104 }
105 printf("sp : %08lx ip : %08lx fp : %08lx\n",
106 regs->ARM_sp, regs->ARM_ip, regs->ARM_fp);
107 printf ("r10: %08lx r9 : %08lx r8 : %08lx\n",
108 regs->ARM_r10, regs->ARM_r9, regs->ARM_r8);
109 printf ("r7 : %08lx r6 : %08lx r5 : %08lx r4 : %08lx\n",
110 regs->ARM_r7, regs->ARM_r6, regs->ARM_r5, regs->ARM_r4);
111 printf ("r3 : %08lx r2 : %08lx r1 : %08lx r0 : %08lx\n",
112 regs->ARM_r3, regs->ARM_r2, regs->ARM_r1, regs->ARM_r0);
113 printf ("Flags: %c%c%c%c",
114 flags & CC_N_BIT ? 'N' : 'n',
115 flags & CC_Z_BIT ? 'Z' : 'z',
116 flags & CC_C_BIT ? 'C' : 'c', flags & CC_V_BIT ? 'V' : 'v');
117 printf (" IRQs %s FIQs %s Mode %s%s\n",
118 interrupts_enabled (regs) ? "on" : "off",
119 fast_interrupts_enabled (regs) ? "on" : "off",
120 processor_modes[processor_mode (regs)],
121 thumb_mode (regs) ? " (T)" : "");
122 dump_instr(regs);
123 }
124
125 /* fixup PC to point to the instruction leading to the exception */
fixup_pc(struct pt_regs * regs,int offset)126 static inline void fixup_pc(struct pt_regs *regs, int offset)
127 {
128 uint32_t pc = instruction_pointer(regs) + offset;
129 regs->ARM_pc = pc | (regs->ARM_pc & PCMASK);
130 }
131
do_undefined_instruction(struct pt_regs * pt_regs)132 void do_undefined_instruction (struct pt_regs *pt_regs)
133 {
134 efi_restore_gd();
135 printf ("undefined instruction\n");
136 fixup_pc(pt_regs, -4);
137 show_regs (pt_regs);
138 show_efi_loaded_images(pt_regs);
139 bad_mode ();
140 }
141
do_software_interrupt(struct pt_regs * pt_regs)142 void do_software_interrupt (struct pt_regs *pt_regs)
143 {
144 efi_restore_gd();
145 printf ("software interrupt\n");
146 fixup_pc(pt_regs, -4);
147 show_regs (pt_regs);
148 show_efi_loaded_images(pt_regs);
149 bad_mode ();
150 }
151
do_prefetch_abort(struct pt_regs * pt_regs)152 void do_prefetch_abort (struct pt_regs *pt_regs)
153 {
154 efi_restore_gd();
155 printf ("prefetch abort\n");
156 fixup_pc(pt_regs, -8);
157 show_regs (pt_regs);
158 show_efi_loaded_images(pt_regs);
159 bad_mode ();
160 }
161
do_data_abort(struct pt_regs * pt_regs)162 void do_data_abort (struct pt_regs *pt_regs)
163 {
164 efi_restore_gd();
165 printf ("data abort\n");
166 fixup_pc(pt_regs, -8);
167 show_regs (pt_regs);
168 show_efi_loaded_images(pt_regs);
169 bad_mode ();
170 }
171
do_not_used(struct pt_regs * pt_regs)172 void do_not_used (struct pt_regs *pt_regs)
173 {
174 efi_restore_gd();
175 printf ("not used\n");
176 fixup_pc(pt_regs, -8);
177 show_regs (pt_regs);
178 show_efi_loaded_images(pt_regs);
179 bad_mode ();
180 }
181
do_fiq(struct pt_regs * pt_regs)182 void do_fiq (struct pt_regs *pt_regs)
183 {
184 efi_restore_gd();
185 printf ("fast interrupt request\n");
186 fixup_pc(pt_regs, -8);
187 show_regs (pt_regs);
188 show_efi_loaded_images(pt_regs);
189 bad_mode ();
190 }
191
do_irq(struct pt_regs * pt_regs)192 void do_irq (struct pt_regs *pt_regs)
193 {
194 efi_restore_gd();
195 printf ("interrupt request\n");
196 fixup_pc(pt_regs, -8);
197 show_regs (pt_regs);
198 show_efi_loaded_images(pt_regs);
199 bad_mode ();
200 }
201