[src/trunk]: src/sys/arch/arm/apple apple: provide a non-posted bs tag by def...

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

details:   https://anonhg.NetBSD.org/src/rev/18dfc942ebcf
branches:  trunk
changeset: 1023545:18dfc942ebcf
user:      jmcneill <jmcneill%NetBSD.org@localhost>
date:      Mon Sep 13 23:30:52 2021 +0000

description:
apple: provide a non-posted bs tag by default

This tag is still used for early console attachment.

diffstat:

 sys/arch/arm/apple/apple_platform.c |  22 +++++++++++++++++++---
 1 files changed, 19 insertions(+), 3 deletions(-)

diffs (62 lines):

diff -r 181a231aee6d -r 18dfc942ebcf sys/arch/arm/apple/apple_platform.c
--- a/sys/arch/arm/apple/apple_platform.c       Mon Sep 13 23:30:05 2021 +0000
+++ b/sys/arch/arm/apple/apple_platform.c       Mon Sep 13 23:30:52 2021 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: apple_platform.c,v 1.3 2021/09/02 20:57:57 jmcneill Exp $ */
+/* $NetBSD: apple_platform.c,v 1.4 2021/09/13 23:30:52 jmcneill Exp $ */
 
 /*-
  * Copyright (c) 2021 Jared McNeill <jmcneill%invisible.ca@localhost>
@@ -27,7 +27,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: apple_platform.c,v 1.3 2021/09/02 20:57:57 jmcneill Exp $");
+__KERNEL_RCSID(0, "$NetBSD: apple_platform.c,v 1.4 2021/09/13 23:30:52 jmcneill Exp $");
 
 #include <sys/param.h>
 #include <sys/bus.h>
@@ -60,6 +60,8 @@
 
 extern struct bus_space arm_generic_bs_tag;
 
+static struct bus_space apple_nonposted_bs_tag;
+
 struct arm32_bus_dma_tag apple_coherent_dma_tag;
 static struct arm32_dma_range apple_coherent_ranges[] = {
        [0] = {
@@ -70,11 +72,25 @@
        }
 };
 
+static int
+apple_nonposted_bs_map(void *t, bus_addr_t bpa, bus_size_t size, int flag,
+    bus_space_handle_t *bshp)
+{
+       if (flag == 0) {
+               flag |= _ARM_BUS_SPACE_MAP_STRONGLY_ORDERED;
+       }
+
+       return bus_space_map(&arm_generic_bs_tag, bpa, size, flag, bshp);
+}
+
 static void
 apple_platform_bootstrap(void)
 {
        extern struct arm32_bus_dma_tag arm_generic_dma_tag;
 
+       apple_nonposted_bs_tag = arm_generic_bs_tag;
+       apple_nonposted_bs_tag.bs_map = apple_nonposted_bs_map;
+
        apple_coherent_dma_tag = arm_generic_dma_tag;
        apple_coherent_dma_tag._ranges = apple_coherent_ranges;
        apple_coherent_dma_tag._nranges = __arraycount(apple_coherent_ranges);
@@ -85,7 +101,7 @@
 static void
 apple_platform_init_attach_args(struct fdt_attach_args *faa)
 {
-       faa->faa_bst = &arm_generic_bs_tag;
+       faa->faa_bst = &apple_nonposted_bs_tag;
        faa->faa_dmat = &apple_coherent_dma_tag;
 }