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- add CHIP_WRONG_ENDIAN for things like PCI buses behind endianness 

converting hardware that can't be turned off, like MACE PCI found in
  the SGI O2
- when using CHIP_ACCESS_SIZE on a bus with CHIP_ALIGN_STRIDE > 0 make
  sure we apply the stride when shifting data around
ok matt@ and my gdium still works
This commit is contained in:
macallan 2015-02-08 15:22:33 +00:00
parent 3934378a65
commit 21afea1618
1 changed files with 24 additions and 10 deletions
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34
sys/arch/mips/mips/bus_space_alignstride_chipdep.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: bus_space_alignstride_chipdep.c,v 1.19 2012/01/27 18:52:58 para Exp $ */
/* $NetBSD: bus_space_alignstride_chipdep.c,v 1.20 2015/02/08 15:22:33 macallan Exp $ */
/*-
* Copyright (c) 1998, 2000, 2001 The NetBSD Foundation, Inc.
@ -74,6 +74,11 @@
* for the memory or I/O memory space extent.
* CHIP_LITTLE_ENDIAN | CHIP_BIG_ENDIAN
* For endian-specific busses, like PCI (little).
* CHIP_WRONG_ENDIAN
* For things like PCI bridges with endian conversion that
* can't be turned off, so we need to switch address bits
* for 8 and 16bit accesses.
* Example: MACE PCI bridge in SGI O2
* CHIP_ACCESS_SIZE
* Size (in bytes) of minimum bus access, e.g. 4
* to indicate all bus cycles are 32-bits. Defaults
@ -81,7 +86,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: bus_space_alignstride_chipdep.c,v 1.19 2012/01/27 18:52:58 para Exp $");
__KERNEL_RCSID(0, "$NetBSD: bus_space_alignstride_chipdep.c,v 1.20 2015/02/08 15:22:33 macallan Exp $");
#ifdef CHIP_EXTENT
#include <sys/extent.h>
@ -194,17 +199,25 @@ static long
#define CHIP_ALIGN_STRIDE 0
#endif
#ifdef CHIP_WRONG_ENDIAN
#define CHIP_OFF8(o) ((o) ^ 3)
#else
#if CHIP_ALIGN_STRIDE > 0
#define CHIP_OFF8(o) ((o) << (CHIP_ALIGN_STRIDE))
#else
#define CHIP_OFF8(o) (o)
#endif
#endif
#ifdef CHIP_WRONG_ENDIAN
#define CHIP_OFF16(o) ((o) ^ 2)
#else
#if CHIP_ALIGN_STRIDE > 1
#define CHIP_OFF16(o) ((o) << (CHIP_ALIGN_STRIDE - 1))
#else
#define CHIP_OFF16(o) (o)
#endif
#endif
#if CHIP_ALIGN_STRIDE > 2
#define CHIP_OFF32(o) ((o) << (CHIP_ALIGN_STRIDE - 2))
@ -662,7 +675,8 @@ __BS(read_1)(void *v, bus_space_handle_t h, bus_size_t off)
int shift;
h += CHIP_OFF8(off);
shift = (off & (CHIP_ACCESS_SIZE - 1)) * 8;
shift = (h & (CHIP_ACCESS_SIZE - 1)) * 8;
ptr = (void *)(h & ~((bus_space_handle_t)(CHIP_ACCESS_SIZE - 1)));
r = (uint8_t)(CHIP_SWAP_ACCESS(*ptr) >> shift);
@ -682,7 +696,7 @@ __BS(read_2)(void *v, bus_space_handle_t h, bus_size_t off)
KASSERT((off & 1) == 0);
h += CHIP_OFF16(off);
shift = (off & (CHIP_ACCESS_SIZE - 1)) * 8;
shift = (h & (CHIP_ACCESS_SIZE - 1)) * 8;
ptr = (void *)(h & ~((bus_space_handle_t)(CHIP_ACCESS_SIZE - 1)));
r = (uint16_t)CHIP_SWAP16(*ptr >> shift);
@ -702,7 +716,7 @@ __BS(read_4)(void *v, bus_space_handle_t h, bus_size_t off)
KASSERT((off & 3) == 0);
h += CHIP_OFF32(off);
shift = (off & (CHIP_ACCESS_SIZE - 1)) * 8;
shift = (h & (CHIP_ACCESS_SIZE - 1)) * 8;
ptr = (void *)(h & ~((bus_space_handle_t)(CHIP_ACCESS_SIZE - 1)));
r = (uint32_t)CHIP_SWAP32(*ptr >> shift);
@ -718,7 +732,7 @@ __BS(read_8)(void *v, bus_space_handle_t h, bus_size_t off)
KASSERT((off & 7) == 0);
h += CHIP_OFF64(off);
shift = (off & (CHIP_ACCESS_SIZE - 1)) * 8;
shift = (h & (CHIP_ACCESS_SIZE - 1)) * 8;
ptr = (void *)(h & ~((bus_space_handle_t)(CHIP_ACCESS_SIZE - 1)));
r = CHIP_SWAP64(*ptr >> shift);
@ -771,7 +785,7 @@ __BS(write_1)(void *v, bus_space_handle_t h, bus_size_t off, uint8_t val)
int shift;
h += CHIP_OFF8(off);
shift = (off & (CHIP_ACCESS_SIZE - 1)) * 8;
shift = (h & (CHIP_ACCESS_SIZE - 1)) * 8;
ptr = (void *)(h & ~((bus_space_handle_t)(CHIP_ACCESS_SIZE - 1)));
*ptr = CHIP_SWAP_ACCESS(((CHIP_TYPE)val) << shift);
}
@ -788,7 +802,7 @@ __BS(write_2)(void *v, bus_space_handle_t h, bus_size_t off, uint16_t val)
KASSERT((off & 1) == 0);
h += CHIP_OFF16(off);
shift = (off & (CHIP_ACCESS_SIZE - 1)) * 8;
shift = (h & (CHIP_ACCESS_SIZE - 1)) * 8;
ptr = (void *)(h & ~((bus_space_handle_t)(CHIP_ACCESS_SIZE - 1)));
if (CHIP_ACCESS_SIZE > 2)
*ptr = (CHIP_TYPE)(CHIP_SWAP16(val)) << shift;
@ -808,7 +822,7 @@ __BS(write_4)(void *v, bus_space_handle_t h, bus_size_t off, uint32_t val)
KASSERT((off & 3) == 0);
h += CHIP_OFF32(off);
shift = (off & (CHIP_ACCESS_SIZE - 1)) * 8;
shift = (h & (CHIP_ACCESS_SIZE - 1)) * 8;
ptr = (void *)(h & ~((bus_space_handle_t)(CHIP_ACCESS_SIZE - 1)));
if (CHIP_ACCESS_SIZE > 4)
*ptr = (CHIP_TYPE)(CHIP_SWAP32(val)) << shift;
@ -824,7 +838,7 @@ __BS(write_8)(void *v, bus_space_handle_t h, bus_size_t off, uint64_t val)
KASSERT((off & 7) == 0);
h += CHIP_OFF64(off);
shift = (off & (CHIP_ACCESS_SIZE - 1)) * 8;
shift = (h & (CHIP_ACCESS_SIZE - 1)) * 8;
ptr = (void *)(h & ~((bus_space_handle_t)(CHIP_ACCESS_SIZE - 1)));
*ptr = CHIP_SWAP64(val) << shift;
}