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Added sparse address support, required by the macio ATA device

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Approved by: benno
This commit is contained in:
Peter Grehan 2002-09-19 04:44:04 +00:00
parent 6e1073f023
commit 6dfada4cca
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=103611
1 changed files with 9 additions and 4 deletions
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13
sys/powerpc/include/bus.h
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@ -91,11 +91,16 @@
/*
* Values for the ppc bus space tag, not to be used directly by MI code.
* Low byte contains the shift value
*/
#define PPC_BUS_SPACE_MEM 1 /* space is mem space */
#define PPC_BUS_SPACE_MEM 0x100 /* space is mem space */
#define PPC_BUS_MEM_MASK 0x0ff
#define __BA(t, h, o) ((void *)((h) + (o)))
/*
* Flags for bus_resource_alloc(MEM|IOPORT). XXX this is very bad: it's
* assumed that this won't conflict with resource flags :-(
*/
#define PPC_BUS_SPARSE4 0x800000 /* shift offset left 4 bits */
/*
* Bus address and size types
@ -112,7 +117,7 @@ typedef u_int32_t bus_space_handle_t;
static __inline void *
__ppc_ba(bus_space_tag_t tag, bus_space_handle_t handle, bus_size_t offset)
{
return ((void *)(handle + offset));
return ((void *)(handle + (offset << (tag & PPC_BUS_MEM_MASK))));
}