[src/trunk]: src/external/cddl/osnet/dev/fbt/aarch64 Switch from db_write_byt...

[riastradh <riastradh%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/8f6ea67b1168
branches:  trunk
changeset: 744750:8f6ea67b1168
user:      riastradh <riastradh%NetBSD.org@localhost>
date:      Wed Feb 12 06:05:31 2020 +0000

description:
Switch from db_write_bytes to using direct-mapping.

This way there's no dependency on ddb.

diffstat:

 external/cddl/osnet/dev/fbt/aarch64/fbt_isa.c |  13 ++++++++++---
 1 files changed, 10 insertions(+), 3 deletions(-)

diffs (31 lines):

diff -r bee022498d2e -r 8f6ea67b1168 external/cddl/osnet/dev/fbt/aarch64/fbt_isa.c
--- a/external/cddl/osnet/dev/fbt/aarch64/fbt_isa.c     Wed Feb 12 06:05:23 2020 +0000
+++ b/external/cddl/osnet/dev/fbt/aarch64/fbt_isa.c     Wed Feb 12 06:05:31 2020 +0000
@@ -37,7 +37,9 @@
 #include <sys/module.h>
 #include <sys/kmem.h>
 
-#include <ddb/ddb.h>
+#include <uvm/uvm_extern.h>
+
+#include <dev/mm.h>
 
 #include <machine/cpufunc.h>
 
@@ -92,9 +94,14 @@
 void
 fbt_patch_tracepoint(fbt_probe_t *fbt, fbt_patchval_t val)
 {
+       paddr_t pa;
+       vaddr_t va;
 
-       db_write_bytes((db_addr_t)fbt->fbtp_patchpoint, sizeof(val),
-           (const void *)&val);
+       if (!pmap_extract(pmap_kernel(), (vaddr_t)fbt->fbtp_patchpoint, &pa))
+               return;
+       if (!mm_md_direct_mapped_phys(pa, &va))
+               return;
+       *(fbt_patchval_t *)va = val;
        cpu_icache_sync_range((vm_offset_t)fbt->fbtp_patchpoint, sizeof(val));
 }