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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/sparc64 | |
| 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/sparc64')
| -rw-r--r-- | sys/sparc64/sparc64/nexus.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/sys/sparc64/sparc64/nexus.c b/sys/sparc64/sparc64/nexus.c index 7082220..67a954b 100644 --- a/sys/sparc64/sparc64/nexus.c +++ b/sys/sparc64/sparc64/nexus.c @@ -98,6 +98,7 @@ static bus_bind_intr_t nexus_bind_intr; #endif static bus_describe_intr_t nexus_describe_intr; static bus_get_dma_tag_t nexus_get_dma_tag; +static bus_get_bus_tag_t nexus_get_bus_tag; static ofw_bus_get_devinfo_t nexus_get_devinfo; static int nexus_inlist(const char *, const char *const *); @@ -135,6 +136,7 @@ static device_method_t nexus_methods[] = { #endif DEVMETHOD(bus_describe_intr, nexus_describe_intr), DEVMETHOD(bus_get_dma_tag, nexus_get_dma_tag), + DEVMETHOD(bus_get_bus_tag, nexus_get_bus_tag), /* ofw_bus interface */ DEVMETHOD(ofw_bus_get_devinfo, nexus_get_devinfo), @@ -502,6 +504,13 @@ nexus_get_dma_tag(device_t bus __unused, device_t child __unused) return (&nexus_dmatag); } +static bus_space_tag_t +nexus_get_bus_tag(device_t bus __unused, device_t child __unused) +{ + + return (&nexus_bustag); +} + static const struct ofw_bus_devinfo * nexus_get_devinfo(device_t bus __unused, device_t child) { |
