blob: ece7cbffc6dd2ea0b0b87cf811a889fbb1c1cc0f [file] [log] [blame]
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2023, Ventana Micro Systems Inc., Andrew Jones <ajones@ventanamicro.com>
*/
#include <libcflat.h>
#include <asm/csr.h>
#include <asm/isa.h>
#include <asm/processor.h>
#include <asm/setup.h>
extern unsigned long ImageBase;
void show_regs(struct pt_regs *regs)
{
struct thread_info *info = current_thread_info();
uintptr_t loadaddr = (uintptr_t)&ImageBase;
unsigned int w = __riscv_xlen / 4;
printf("Load address: %" PRIxPTR "\n", loadaddr);
printf("CPU%3d : hartid=%lx\n", info->cpu, info->hartid);
printf("status : %.*lx\n", w, regs->status);
printf("cause : %.*lx\n", w, regs->cause);
printf("badaddr: %.*lx\n", w, regs->badaddr);
printf("pc: %.*lx (%lx) ra: %.*lx (%lx)\n", w, regs->epc, regs->epc - loadaddr, w, regs->ra, regs->ra - loadaddr);
printf("sp: %.*lx gp: %.*lx tp : %.*lx\n", w, regs->sp, w, regs->gp, w, regs->tp);
printf("a0: %.*lx a1: %.*lx a2 : %.*lx a3 : %.*lx\n", w, regs->a0, w, regs->a1, w, regs->a2, w, regs->a3);
printf("a4: %.*lx a5: %.*lx a6 : %.*lx a7 : %.*lx\n", w, regs->a4, w, regs->a5, w, regs->a6, w, regs->a7);
printf("t0: %.*lx t1: %.*lx t2 : %.*lx t3 : %.*lx\n", w, regs->t0, w, regs->t1, w, regs->t2, w, regs->t3);
printf("t4: %.*lx t5: %.*lx t6 : %.*lx\n", w, regs->t4, w, regs->t5, w, regs->t6);
printf("s0: %.*lx s1: %.*lx s2 : %.*lx s3 : %.*lx\n", w, regs->s0, w, regs->s1, w, regs->s2, w, regs->s3);
printf("s4: %.*lx s5: %.*lx s6 : %.*lx s7 : %.*lx\n", w, regs->s4, w, regs->s5, w, regs->s6, w, regs->s7);
printf("s8: %.*lx s9: %.*lx s10: %.*lx s11: %.*lx\n", w, regs->s8, w, regs->s9, w, regs->s10, w, regs->s11);
}
void do_handle_exception(struct pt_regs *regs)
{
struct thread_info *info = current_thread_info();
assert(regs->cause < EXCEPTION_CAUSE_MAX);
if (info->exception_handlers[regs->cause]) {
info->exception_handlers[regs->cause](regs);
return;
}
show_regs(regs);
dump_frame_stack((void *)regs->epc, (void *)regs->s0);
abort();
}
void install_exception_handler(unsigned long cause, void (*handler)(struct pt_regs *))
{
struct thread_info *info = current_thread_info();
assert(cause < EXCEPTION_CAUSE_MAX);
info->exception_handlers[cause] = handler;
}
void thread_info_init(void)
{
unsigned long hartid = csr_read(CSR_SSCRATCH);
int cpu = hartid_to_cpu(hartid);
isa_init(&cpus[cpu]);
csr_write(CSR_SSCRATCH, &cpus[cpu]);
}