47ef6a5146
bus_space_handle_t now holds an address and two ASIs, one for normal accesses and one for streaming accesses. This allows to map individual handles different ways, so some can use MMU bypass accesses and others use virtual addresses. bus_space_map() will now create handles that use bypass accesses unles BUS_SPACE_MAP_LINEAR is passed in. So only pass in BUS_SPACE_MAP_LINEAR if you absolutely *need* to use bus_space_vaddr(). This removes at least one extra level of indirection and should reduce TLB misses. 32-bit kernels have problems accessing 64-bit addresses, so they always use virtual addresses. |
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