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| author | zbb <zbb@FreeBSD.org> | 2016-02-18 13:00:04 +0000 |
|---|---|---|
| committer | zbb <zbb@FreeBSD.org> | 2016-02-18 13:00:04 +0000 |
| commit | d2a1177be6963874bcf8d15330e4ea74c36d6823 (patch) | |
| tree | 2affdba8f0124a43a93eb47db8afb77ab54cfd50 /sys/powerpc | |
| parent | d520d79a17fed19e354e59fe3a6046fa89bcf8e3 (diff) | |
| download | FreeBSD-src-d2a1177be6963874bcf8d15330e4ea74c36d6823.zip FreeBSD-src-d2a1177be6963874bcf8d15330e4ea74c36d6823.tar.gz | |
Introduce bus_get_bus_tag() method
Provide bus_get_bus_tag() for sparc64, powerpc, arm, arm64 and mips
nexus and its children in order to return a platform specific default tag.
This is required to ensure generic correctness of the bus_space tag.
It is especially needed for arches where child bus tag does not match
the parent bus tag. This solves the problem with ppc architecture
where the PCI bus tag differs from parent bus tag which is big-endian.
This commit is a part of the following patch:
https://reviews.freebsd.org/D4879
Submitted by: Marcin Mazurek <mma@semihalf.com>
Obtained from: Semihalf
Sponsored by: Annapurna Labs
Reviewed by: jhibbits, mmel
Differential Revision: https://reviews.freebsd.org/D4879
Diffstat (limited to 'sys/powerpc')
| -rw-r--r-- | sys/powerpc/powerpc/nexus.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/sys/powerpc/powerpc/nexus.c b/sys/powerpc/powerpc/nexus.c index dff21f8..1ad118c 100644 --- a/sys/powerpc/powerpc/nexus.c +++ b/sys/powerpc/powerpc/nexus.c @@ -66,6 +66,7 @@ static bus_setup_intr_t nexus_setup_intr; static bus_teardown_intr_t nexus_teardown_intr; static bus_activate_resource_t nexus_activate_resource; static bus_deactivate_resource_t nexus_deactivate_resource; +static bus_space_tag_t nexus_get_bus_tag(device_t, device_t); #ifdef SMP static bus_bind_intr_t nexus_bind_intr; #endif @@ -87,6 +88,7 @@ static device_method_t nexus_methods[] = { DEVMETHOD(bus_bind_intr, nexus_bind_intr), #endif DEVMETHOD(bus_config_intr, nexus_config_intr), + DEVMETHOD(bus_get_bus_tag, nexus_get_bus_tag), /* ofw_bus interface */ DEVMETHOD(ofw_bus_map_intr, nexus_ofw_map_intr), @@ -155,6 +157,13 @@ nexus_teardown_intr(device_t bus __unused, device_t child __unused, return (powerpc_teardown_intr(ih)); } +static bus_space_tag_t +nexus_get_bus_tag(device_t bus __unused, device_t child __unused) +{ + + return(&bs_be_tag); +} + #ifdef SMP static int nexus_bind_intr(device_t bus __unused, device_t child __unused, |
