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author | jhb <jhb@FreeBSD.org> | 2000-10-18 10:30:12 +0000 |
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committer | jhb <jhb@FreeBSD.org> | 2000-10-18 10:30:12 +0000 |
commit | a4104b417ea985c653c0668f77ffee40394327a6 (patch) | |
tree | 65f9ce24ef1b9657dabe0c1eb26b1faa5882ec1c /sys/alpha | |
parent | 8aa01908ad19f43c27b74c89bcd456610e34b435 (diff) | |
download | FreeBSD-src-a4104b417ea985c653c0668f77ffee40394327a6.zip FreeBSD-src-a4104b417ea985c653c0668f77ffee40394327a6.tar.gz |
Add in a simple API for memory barriers to machine/bus.h:
- barrier_read() enforces a memory read barrier
- barrier_write() enforces a memory write barrier
- barrier_rw() enforces a memory read/write barrier
Diffstat (limited to 'sys/alpha')
-rw-r--r-- | sys/alpha/include/bus.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/sys/alpha/include/bus.h b/sys/alpha/include/bus.h index 7fe2726..1810c4b 100644 --- a/sys/alpha/include/bus.h +++ b/sys/alpha/include/bus.h @@ -364,6 +364,18 @@ void busspace_generic_barrier(struct alpha_busspace *space, #define bus_space_barrier(t, h, o, l, f) \ (t)->ab_ops->abo_barrier(t, (h)+(o), l, f) +#define barrier_read \ + bus_space_barrier(busspace_isa_mem, 0, BUS_SPACE_UNRESTRICTED, \ + BUS_SPACE_BARRIER_READ) + +#define barrier_write \ + bus_space_barrier(busspace_isa_mem, 0, BUS_SPACE_UNRESTRICTED, \ + BUS_SPACE_BARRIER_WRITE) + +#define barrier_rw \ + bus_space_barrier(busspace_isa_mem, 0, BUS_SPACE_UNRESTRICTED, \ + BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE) + /* * Flags used in various bus DMA methods. */ |