diff options
Diffstat (limited to 'sys/arch/amd64')
| -rw-r--r-- | sys/arch/amd64/pci/agp_machdep.c | 55 |
1 files changed, 54 insertions, 1 deletions
diff --git a/sys/arch/amd64/pci/agp_machdep.c b/sys/arch/amd64/pci/agp_machdep.c index 5e320e95293..94a94d5fdb7 100644 --- a/sys/arch/amd64/pci/agp_machdep.c +++ b/sys/arch/amd64/pci/agp_machdep.c @@ -1,4 +1,4 @@ -/* $OpenBSD: agp_machdep.c,v 1.5 2010/04/08 01:26:44 oga Exp $ */ +/* $OpenBSD: agp_machdep.c,v 1.6 2010/05/10 22:06:04 oga Exp $ */ /* * Copyright (c) 2008 - 2009 Owain G. Ainsworth <oga@openbsd.org> @@ -174,6 +174,59 @@ agp_bus_dma_set_alignment(bus_dma_tag_t tag, bus_dmamap_t dmam, sg_dmamap_set_alignment(tag, dmam, alignment); } +struct agp_map { + bus_space_tag_t bst; + bus_space_handle_t bsh; + bus_size_t size; +}; + +int +agp_init_map(bus_space_tag_t tag, bus_addr_t address, bus_size_t size, + int flags, struct agp_map **mapp) +{ + struct agp_map *map; + int err; + + map = malloc(sizeof(*map), M_AGP, M_WAITOK | M_CANFAIL); + if (map == NULL) + return (ENOMEM); + + map->bst = tag; + map->size = size; + + if ((err = bus_space_map(tag, address, size, flags, &map->bsh)) != 0) { + free(map, M_AGP); + return (err); + } + *mapp = map; + return (0); +} + +void +agp_destroy_map(struct agp_map *map) +{ + bus_space_unmap(map->bst, map->bsh, map->size); + free(map, M_AGP); +} + + +int +agp_map_subregion(struct agp_map *map, bus_size_t offset, bus_size_t size, + bus_space_handle_t *bshp) +{ + if (offset > map->size || size > map->size || offset + size > map->size) + return (EINVAL); + return (bus_space_subregion(map->bst, map->bsh, offset, size, bshp)); + +} + +void +agp_unmap_subregion(struct agp_map *map, bus_space_handle_t bsh, + bus_size_t size) +{ + /* subregion doesn't need unmapping, do nothing */ +} + /* * ick ick ick. However, the rest of this driver is supposedly MI (though * they only exist on x86), so this can't be in dev/pci. |