[src/trunk]: src/sys/arch/arm/footbridge Use devmap if available

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

details:   https://anonhg.NetBSD.org/src/rev/14ac70b3a6d7
branches:  trunk
changeset: 824661:14ac70b3a6d7
user:      skrll <skrll%NetBSD.org@localhost>
date:      Tue Jun 13 15:23:17 2017 +0000

description:
Use devmap if available

diffstat:

 sys/arch/arm/footbridge/footbridge_io.c |  17 ++++++++++++-----
 1 files changed, 12 insertions(+), 5 deletions(-)

diffs (50 lines):

diff -r 9a5f229ee6e2 -r 14ac70b3a6d7 sys/arch/arm/footbridge/footbridge_io.c
--- a/sys/arch/arm/footbridge/footbridge_io.c   Tue Jun 13 14:05:47 2017 +0000
+++ b/sys/arch/arm/footbridge/footbridge_io.c   Tue Jun 13 15:23:17 2017 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: footbridge_io.c,v 1.22 2014/02/22 20:33:00 matt Exp $  */
+/*     $NetBSD: footbridge_io.c,v 1.23 2017/06/13 15:23:17 skrll Exp $ */
 
 /*
  * Copyright (c) 1997 Causality Limited
@@ -39,7 +39,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: footbridge_io.c,v 1.22 2014/02/22 20:33:00 matt Exp $");
+__KERNEL_RCSID(0, "$NetBSD: footbridge_io.c,v 1.23 2017/06/13 15:23:17 skrll Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -182,8 +182,8 @@
 footbridge_mem_bs_map(void *t, bus_addr_t bpa, bus_size_t size, int flags,
     bus_space_handle_t *bshp)
 {
-       bus_addr_t startpa, endpa, pa;
-       vaddr_t va;
+       paddr_t startpa, endpa, pa;
+       const struct pmap_devmap *pd;
 
        /* Round the allocation to page boundries */
        startpa = trunc_page(bpa);
@@ -200,12 +200,19 @@
                return 0;
        }
 
+       pa = bpa;
+       if ((pd = pmap_devmap_find_pa(pa, size)) != NULL) {
+               /* Device was statically mapped. */
+               *bshp = pd->pd_va + (pa - pd->pd_pa);
+               return 0;
+       }
+
        /*
         * Eventually this function will do the mapping check for overlapping / 
         * multiple mappings
         */
 
-       va = uvm_km_alloc(kernel_map, endpa - startpa, 0,
+       vaddr_t va = uvm_km_alloc(kernel_map, endpa - startpa, 0,
            UVM_KMF_VAONLY | UVM_KMF_NOWAIT);
        if (va == 0)
                return ENOMEM;