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#include "femto.h"
#ifdef __riscv
#include "arch/riscv/csr.h"
#include "arch/riscv/trap.h"
#include "arch/riscv/encoding.h"
#include "arch/riscv/machine.h"
#define MCAUSE_UNSET 0xabbaabba
static volatile uintptr_t save_mcause;
static void trap_save_cause(uintptr_t* regs, uintptr_t mcause, uintptr_t mepc)
{
save_mcause = mcause;
write_csr(mepc, mepc + 4);
}
static const char* isa_string(char *buf, size_t bufsz)
{
static const char *ext = "iemafdqlcbjtpvnsu";
const char *p = ext;
char *q = buf + snprintf(buf, bufsz, "rv%d", xlen());
do {
if (has_ext(*p)) {
*q++ = *p;
}
} while (*++p);
*q = '\0';
return buf;
}
static void probe_all_csrs()
{
int *csrenum = csr_enum_array();
const char **csrnames = csr_name_array();
const char* ws = " ";
set_trap_fn(trap_save_cause);
while (*csrenum != csr_none) {
save_mcause = MCAUSE_UNSET;
long value = read_csr_enum(*csrenum);
const char* csrname = csrnames[*csrenum];
if (save_mcause != MCAUSE_UNSET) {
int async = save_mcause < 0;
int cause = save_mcause & (((uintptr_t)-1) >> async);
printf("csr: %s%s %s cause=%ld mtval=0x%lx\n",
csrname, ws + strlen(csrname), cause < 16
? (async ? riscv_intr_names : riscv_excp_names)[cause]
: "(unknown)", save_mcause, read_csr_enum(csr_mtval));
} else {
printf("csr: %s%s 0x%lx\n",
csrname, ws + strlen(csrname), value);
}
csrenum++;
}
}
#endif
int main(int argc, char **argv)
{
#ifdef __riscv
char buf[32];
printf("isa: %s\n", isa_string(buf, sizeof(buf)));
probe_all_csrs();
printf("\n");
#else
puts("architecture-not-supported");
#endif
}
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