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/*
* (C) Copyright 2015
* Kamil Lulko, <kamil.lulko@gmail.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
/*
* Upon exception entry ARMv7-M processors automatically save stack
* frames containing some registers. For simplicity initial
* implementation uses only this auto-saved stack frame.
* This does not contain complete register set dump,
* only R0-R3, R12, LR, PC and xPSR are saved.
*/
struct autosave_regs {
long uregs[8];
};
#define ARM_XPSR uregs[7]
#define ARM_PC uregs[6]
#define ARM_LR uregs[5]
#define ARM_R12 uregs[4]
#define ARM_R3 uregs[3]
#define ARM_R2 uregs[2]
#define ARM_R1 uregs[1]
#define ARM_R0 uregs[0]
int interrupt_init(void)
{
return 0;
}
void enable_interrupts(void)
{
return;
}
int disable_interrupts(void)
{
return 0;
}
void dump_regs(struct autosave_regs *regs)
{
printf("pc : %08lx lr : %08lx xPSR : %08lx\n",
regs->ARM_PC, regs->ARM_LR, regs->ARM_XPSR);
printf("r12 : %08lx r3 : %08lx r2 : %08lx\n"
"r1 : %08lx r0 : %08lx\n",
regs->ARM_R12, regs->ARM_R3, regs->ARM_R2,
regs->ARM_R1, regs->ARM_R0);
}
void bad_mode(void)
{
panic("Resetting CPU ...\n");
reset_cpu(0);
}
void do_hard_fault(struct autosave_regs *autosave_regs)
{
printf("Hard fault\n");
dump_regs(autosave_regs);
bad_mode();
}
void do_mm_fault(struct autosave_regs *autosave_regs)
{
printf("Memory management fault\n");
dump_regs(autosave_regs);
bad_mode();
}
void do_bus_fault(struct autosave_regs *autosave_regs)
{
printf("Bus fault\n");
dump_regs(autosave_regs);
bad_mode();
}
void do_usage_fault(struct autosave_regs *autosave_regs)
{
printf("Usage fault\n");
dump_regs(autosave_regs);
bad_mode();
}
void do_invalid_entry(struct autosave_regs *autosave_regs)
{
printf("Exception\n");
dump_regs(autosave_regs);
bad_mode();
}
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