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21#include <common.h>
22#include <cpu_func.h>
23#include <efi_loader.h>
24#include <irq_func.h>
25#include <asm/proc-armv/ptrace.h>
26#include <asm/ptrace.h>
27#include <asm/u-boot-arm.h>
28
29DECLARE_GLOBAL_DATA_PTR;
30
31int interrupt_init(void)
32{
33
34
35
36 IRQ_STACK_START_IN = gd->irq_sp + 8;
37
38 enable_interrupts();
39
40 return 0;
41}
42
43void enable_interrupts(void)
44{
45 return;
46}
47int disable_interrupts(void)
48{
49 return 0;
50}
51
52void bad_mode (void)
53{
54 panic ("Resetting CPU ...\n");
55 reset_cpu(0);
56}
57
58static void show_efi_loaded_images(struct pt_regs *regs)
59{
60 efi_print_image_infos((void *)instruction_pointer(regs));
61}
62
63static void dump_instr(struct pt_regs *regs)
64{
65 unsigned long addr = instruction_pointer(regs);
66 const int thumb = thumb_mode(regs);
67 const int width = thumb ? 4 : 8;
68 int i;
69
70 if (thumb)
71 addr &= ~1L;
72 else
73 addr &= ~3L;
74 printf("Code: ");
75 for (i = -4; i < 1 + !!thumb; i++) {
76 unsigned int val;
77
78 if (thumb)
79 val = ((u16 *)addr)[i];
80 else
81 val = ((u32 *)addr)[i];
82 printf(i == 0 ? "(%0*x) " : "%0*x ", width, val);
83 }
84 printf("\n");
85}
86
87void show_regs (struct pt_regs *regs)
88{
89 unsigned long __maybe_unused flags;
90 const char __maybe_unused *processor_modes[] = {
91 "USER_26", "FIQ_26", "IRQ_26", "SVC_26",
92 "UK4_26", "UK5_26", "UK6_26", "UK7_26",
93 "UK8_26", "UK9_26", "UK10_26", "UK11_26",
94 "UK12_26", "UK13_26", "UK14_26", "UK15_26",
95 "USER_32", "FIQ_32", "IRQ_32", "SVC_32",
96 "UK4_32", "UK5_32", "UK6_32", "ABT_32",
97 "UK8_32", "UK9_32", "HYP_32", "UND_32",
98 "UK12_32", "UK13_32", "UK14_32", "SYS_32",
99 };
100
101 flags = condition_codes (regs);
102
103 printf("pc : [<%08lx>] lr : [<%08lx>]\n",
104 instruction_pointer(regs), regs->ARM_lr);
105 if (gd->flags & GD_FLG_RELOC) {
106 printf("reloc pc : [<%08lx>] lr : [<%08lx>]\n",
107 instruction_pointer(regs) - gd->reloc_off,
108 regs->ARM_lr - gd->reloc_off);
109 }
110 printf("sp : %08lx ip : %08lx fp : %08lx\n",
111 regs->ARM_sp, regs->ARM_ip, regs->ARM_fp);
112 printf ("r10: %08lx r9 : %08lx r8 : %08lx\n",
113 regs->ARM_r10, regs->ARM_r9, regs->ARM_r8);
114 printf ("r7 : %08lx r6 : %08lx r5 : %08lx r4 : %08lx\n",
115 regs->ARM_r7, regs->ARM_r6, regs->ARM_r5, regs->ARM_r4);
116 printf ("r3 : %08lx r2 : %08lx r1 : %08lx r0 : %08lx\n",
117 regs->ARM_r3, regs->ARM_r2, regs->ARM_r1, regs->ARM_r0);
118 printf ("Flags: %c%c%c%c",
119 flags & CC_N_BIT ? 'N' : 'n',
120 flags & CC_Z_BIT ? 'Z' : 'z',
121 flags & CC_C_BIT ? 'C' : 'c', flags & CC_V_BIT ? 'V' : 'v');
122 printf (" IRQs %s FIQs %s Mode %s%s\n",
123 interrupts_enabled (regs) ? "on" : "off",
124 fast_interrupts_enabled (regs) ? "on" : "off",
125 processor_modes[processor_mode (regs)],
126 thumb_mode (regs) ? " (T)" : "");
127 dump_instr(regs);
128}
129
130
131static inline void fixup_pc(struct pt_regs *regs, int offset)
132{
133 uint32_t pc = instruction_pointer(regs) + offset;
134 regs->ARM_pc = pc | (regs->ARM_pc & PCMASK);
135}
136
137void do_undefined_instruction (struct pt_regs *pt_regs)
138{
139 efi_restore_gd();
140 printf ("undefined instruction\n");
141 fixup_pc(pt_regs, -4);
142 show_regs (pt_regs);
143 show_efi_loaded_images(pt_regs);
144 bad_mode ();
145}
146
147void do_software_interrupt (struct pt_regs *pt_regs)
148{
149 efi_restore_gd();
150 printf ("software interrupt\n");
151 fixup_pc(pt_regs, -4);
152 show_regs (pt_regs);
153 show_efi_loaded_images(pt_regs);
154 bad_mode ();
155}
156
157void do_prefetch_abort (struct pt_regs *pt_regs)
158{
159 efi_restore_gd();
160 printf ("prefetch abort\n");
161 fixup_pc(pt_regs, -8);
162 show_regs (pt_regs);
163 show_efi_loaded_images(pt_regs);
164 bad_mode ();
165}
166
167void do_data_abort (struct pt_regs *pt_regs)
168{
169 efi_restore_gd();
170 printf ("data abort\n");
171 fixup_pc(pt_regs, -8);
172 show_regs (pt_regs);
173 show_efi_loaded_images(pt_regs);
174 bad_mode ();
175}
176
177void do_not_used (struct pt_regs *pt_regs)
178{
179 efi_restore_gd();
180 printf ("not used\n");
181 fixup_pc(pt_regs, -8);
182 show_regs (pt_regs);
183 show_efi_loaded_images(pt_regs);
184 bad_mode ();
185}
186
187void do_fiq (struct pt_regs *pt_regs)
188{
189 efi_restore_gd();
190 printf ("fast interrupt request\n");
191 fixup_pc(pt_regs, -8);
192 show_regs (pt_regs);
193 show_efi_loaded_images(pt_regs);
194 bad_mode ();
195}
196
197void do_irq (struct pt_regs *pt_regs)
198{
199 efi_restore_gd();
200 printf ("interrupt request\n");
201 fixup_pc(pt_regs, -8);
202 show_regs (pt_regs);
203 show_efi_loaded_images(pt_regs);
204 bad_mode ();
205}
206
