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Implement bus_space_mmap().

This commit is contained in:
thorpej 2001-09-04 06:57:26 +00:00
parent c91e08563f
commit a08af3853a
2 changed files with 36 additions and 3 deletions
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24
sys/arch/arc/arc/bus_space.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: bus_space.c,v 1.3 2000/11/09 06:05:40 thorpej Exp $ */
/* $NetBSD: bus_space.c,v 1.4 2001/09/04 06:57:26 thorpej Exp $ */
/* NetBSD: bus_machdep.c,v 1.1 2000/01/26 18:48:00 drochner Exp */
/*-
@ -68,6 +68,7 @@ arc_bus_space_init(bst, name, paddr, vaddr, start, size)
bst->bs_map = arc_bus_space_map;
bst->bs_unmap = arc_bus_space_unmap;
bst->bs_subregion = arc_bus_space_subregion;
bst->bs_mmap = arc_bus_space_mmap;
bst->bs_alloc = arc_bus_space_alloc;
bst->bs_free = arc_bus_space_free;
bst->bs_aux = NULL;
@ -252,6 +253,27 @@ arc_bus_space_subregion(bst, bsh, offset, size, nbshp)
return (0);
}
paddr_t
arc_bus_space_mmap(bst, addr, off, prot, flags)
bus_space_tag_t bst;
bus_addr_t addr;
off_t off;
int prot;
int flags;
{
/*
* XXX We do not disallow mmap'ing of EISA/PCI I/O space here,
* XXX which we should be doing.
*/
if (addr < bst->bs_start ||
(addr + off) >= (bst->bs_start + bst->bs_size))
return (-1);
return (mips_btop(bst->bs_pbase + (addr - bst->bs_start) + off));
}
int
arc_bus_space_alloc(bst, start, end, size, align, boundary, flags, addrp, bshp)
bus_space_tag_t bst;

15
sys/arch/arc/include/bus.h
View File

@ -1,4 +1,4 @@
/* $NetBSD: bus.h,v 1.11 2001/07/19 15:32:11 thorpej Exp $ */
/* $NetBSD: bus.h,v 1.12 2001/09/04 06:57:27 thorpej Exp $ */
/* NetBSD: bus.h,v 1.27 2000/03/15 16:44:50 drochner Exp */
/* $OpenBSD: bus.h,v 1.15 1999/08/11 23:15:21 niklas Exp $ */
@ -158,6 +158,7 @@ struct arc_bus_space {
bus_size_t));
int (*bs_subregion) __P((bus_space_tag_t, bus_space_handle_t,
bus_size_t, bus_size_t, bus_space_handle_t *));
paddr_t (*bs_mmap) __P((bus_space_tag_t, bus_addr_t, off_t, int, int));
/* allocation/deallocation */
int (*bs_alloc) __P((bus_space_tag_t, bus_addr_t, bus_addr_t,
@ -208,6 +209,7 @@ void arc_bus_space_unmap __P((bus_space_tag_t, bus_space_handle_t,
bus_size_t));
int arc_bus_space_subregion __P((bus_space_tag_t, bus_space_handle_t,
bus_size_t, bus_size_t, bus_space_handle_t *));
paddr_t arc_bus_space_mmap __P((bus_space_tag_t, bus_addr_t, off_t, int, int));
int arc_bus_space_alloc __P((bus_space_tag_t, bus_addr_t, bus_addr_t,
bus_size_t, bus_size_t, bus_size_t, int, bus_addr_t *,
bus_space_handle_t *));
@ -242,7 +244,7 @@ int arc_bus_space_alloc __P((bus_space_tag_t, bus_addr_t, bus_addr_t,
* MACHINE DEPENDENT, NOT PORTABLE INTERFACE:
* (cannot be implemented on e.g. I/O space on i386, non-linear space on alpha)
* Return physical address of a region.
* A helper function for device mmap entry.
* A helper function for machine-dependent device mmap entry.
*/
#define bus_space_paddr(bst, bsh, pap) \
(*(bst)->bs_paddr)(bst, bsh, pap)
@ -257,6 +259,15 @@ int arc_bus_space_alloc __P((bus_space_tag_t, bus_addr_t, bus_addr_t,
#define bus_space_vaddr(bst, bsh) \
((void *)(bsh))
/*
* paddr_t bus_space_mmap __P((bus_space_tag_t, bus_addr_t, off_t,
* int, int));
*
* Mmap bus space on behalf of the user.
*/
#define bus_space_mmap(bst, addr, off, prot, flags) \
(*(bst)->bs_mmap)((bst), (addr), (off), (prot), (flags))
/*
* int bus_space_map __P((bus_space_tag_t t, bus_addr_t addr,
* bus_size_t size, int flags, bus_space_handle_t *bshp));