diff options
Diffstat (limited to 'sys/arch/i386/i386/machdep.c')
| -rw-r--r-- | sys/arch/i386/i386/machdep.c | 43 |
1 files changed, 42 insertions, 1 deletions
diff --git a/sys/arch/i386/i386/machdep.c b/sys/arch/i386/i386/machdep.c index 5ad884d0cff..7b48e132b45 100644 --- a/sys/arch/i386/i386/machdep.c +++ b/sys/arch/i386/i386/machdep.c @@ -1,4 +1,4 @@ -/* $OpenBSD: machdep.c,v 1.290 2004/04/19 22:26:22 tom Exp $ */ +/* $OpenBSD: machdep.c,v 1.291 2004/05/04 17:06:33 grange Exp $ */ /* $NetBSD: machdep.c,v 1.214 1996/11/10 03:16:17 thorpej Exp $ */ /*- @@ -3257,6 +3257,47 @@ ok: } } +void +_bus_space_unmap(bus_space_tag_t t, bus_space_handle_t bsh, bus_size_t size, + bus_addr_t *adrp) +{ + u_long va, endva; + bus_addr_t bpa; + + /* + * Find the correct bus physical address. + */ + if (t == I386_BUS_SPACE_IO) { + bpa = bsh; + } else if (t == I386_BUS_SPACE_MEM) { + bpa = (bus_addr_t)ISA_PHYSADDR(bsh); + if (IOM_BEGIN <= bpa && bpa <= IOM_END) + goto ok; + + va = i386_trunc_page(bsh); + endva = i386_round_page(bsh + size); + +#ifdef DIAGNOSTIC + if (endva <= va) + panic("_bus_space_unmap: overflow"); +#endif + + (void) pmap_extract(pmap_kernel(), va, &bpa); + bpa += (bsh & PGOFSET); + + /* + * Free the kernel virtual mapping. + */ + uvm_km_free(kernel_map, va, endva - va); + } else + panic("bus_space_unmap: bad bus space tag"); + +ok: + if (adrp != NULL) { + *adrp = bpa; + } +} + void bus_space_free(t, bsh, size) bus_space_tag_t t; |