diff --git a/sys/riscv/riscv/pmap.c b/sys/riscv/riscv/pmap.c --- a/sys/riscv/riscv/pmap.c +++ b/sys/riscv/riscv/pmap.c @@ -112,6 +112,7 @@ * and to when physical maps must be made correct. */ +#include "opt_ddb.h" #include "opt_pmap.h" #include @@ -136,6 +137,10 @@ #include #include #include +#ifdef DDB +#include +#include +#endif #include #include @@ -5596,3 +5601,59 @@ CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE | CTLFLAG_SKIP, NULL, 0, sysctl_kmaps, "A", "Dump kernel address layout"); + +#ifdef DDB +DB_SHOW_COMMAND(pte, pmap_print_pte) +{ + pd_entry_t *l0, l0e, *l1, l1e; + pt_entry_t *l2, l2e, *l3, l3e; + vm_offset_t va; + pmap_t pmap; + + if (!have_addr) { + db_printf("show pte addr\n"); + return; + } + + va = (vm_offset_t)addr; + if (!VIRT_IS_VALID(va)) { + db_printf("malformed virtual address %#lx\n", va); + return; + } + + if (kdb_thread != NULL) + pmap = vmspace_pmap(kdb_thread->td_proc->p_vmspace); + else + pmap = PCPU_GET(curpmap); + + db_printf("VA 0x%016lx", va); + if (pmap_mode == PMAP_MODE_SV48) { + l0 = pmap_l0(pmap, va); + l0e = pmap_load(l0); + db_printf(" l0e@0x%016lx 0x%016lx", (uint64_t)l0, l0e); + } + l1 = pmap_l1(pmap, va); + if (l1 == NULL) { + db_printf("\n"); + return; + } + l1e = pmap_load(l1); + db_printf(" l1e@0x%016lx 0x%016lx", (uint64_t)l1, l1e); + + l2 = pmap_l2(pmap, va); + if (l2 == NULL) { + db_printf("\n"); + return; + } + l2e = pmap_load(l2); + db_printf(" l2e@0x%016lx 0x%016lx", (uint64_t)l2, l2e); + + l3 = pmap_l3(pmap, va); + if (l3 == NULL) { + db_printf("\n"); + return; + } + l3e = pmap_load(l3); + db_printf(" l3e@0x%016lx 0x%016lx\n", (uint64_t)l3, l3e); +} +#endif