diff options
| author | Owain Ainsworth <oga@cvs.openbsd.org> | 2009-04-20 00:42:07 +0000 |
|---|---|---|
| committer | Owain Ainsworth <oga@cvs.openbsd.org> | 2009-04-20 00:42:07 +0000 |
| commit | b5396dca6504168d952b238075ba34f507a94e0b (patch) | |
| tree | 39015d7d9f61a69ff36284c190932f40b1bc8834 /sys/arch/hppa | |
| parent | 7720807a1d9f91f5c0f47d6b1be219d913aef6ac (diff) | |
Add a BUS_DMA_ZERO flag for bus_dmamem_alloc() to return zeroed memory.
Saves every damned driver calling bzero(), and continues the M_ZERO,
PR_ZERO symmetry.
Diffstat (limited to 'sys/arch/hppa')
| -rw-r--r-- | sys/arch/hppa/hppa/mainbus.c | 4 | ||||
| -rw-r--r-- | sys/arch/hppa/include/bus.h | 27 |
2 files changed, 17 insertions, 14 deletions
diff --git a/sys/arch/hppa/hppa/mainbus.c b/sys/arch/hppa/hppa/mainbus.c index 72cb94111dc..0df5a4bf850 100644 --- a/sys/arch/hppa/hppa/mainbus.c +++ b/sys/arch/hppa/hppa/mainbus.c @@ -1,4 +1,4 @@ -/* $OpenBSD: mainbus.c,v 1.73 2009/04/14 16:01:04 oga Exp $ */ +/* $OpenBSD: mainbus.c,v 1.74 2009/04/20 00:42:06 oga Exp $ */ /* * Copyright (c) 1998-2004 Michael Shalayeff @@ -942,6 +942,8 @@ mbus_dmamem_alloc(void *v, bus_size_t size, bus_size_t alignment, size = round_page(size); plaflag = flags & BUS_DMA_NOWAIT ? UVM_PLA_NOWAIT : UVM_PLA_WAITOK; + if (flags & BUS_DMA_ZERO) + plaflag |= UVM_PLA_ZERO; TAILQ_INIT(&pglist); if (uvm_pglistalloc(size, 0, -1, alignment, boundary, diff --git a/sys/arch/hppa/include/bus.h b/sys/arch/hppa/include/bus.h index 68810683dbd..61f29bef8f8 100644 --- a/sys/arch/hppa/include/bus.h +++ b/sys/arch/hppa/include/bus.h @@ -1,4 +1,4 @@ -/* $OpenBSD: bus.h,v 1.25 2007/05/23 18:07:19 kettenis Exp $ */ +/* $OpenBSD: bus.h,v 1.26 2009/04/20 00:42:06 oga Exp $ */ /* * Copyright (c) 1998-2004 Michael Shalayeff @@ -291,18 +291,19 @@ extern const struct hppa_bus_space_tag hppa_bustag; #define bus_space_vaddr(t,h) \ ((t)->hbt_vaddr((t)->hbt_cookie, (h))) -#define BUS_DMA_WAITOK 0x000 /* safe to sleep (pseudo-flag) */ -#define BUS_DMA_NOWAIT 0x001 /* not safe to sleep */ -#define BUS_DMA_ALLOCNOW 0x002 /* perform resource allocation now */ -#define BUS_DMA_COHERENT 0x004 /* hint: map memory DMA coherent */ -#define BUS_DMAMEM_NOSYNC 0x010 -#define BUS_DMA_BUS1 0x020 /* placeholders for bus functions... */ -#define BUS_DMA_BUS2 0x040 -#define BUS_DMA_BUS3 0x080 -#define BUS_DMA_BUS4 0x100 -#define BUS_DMA_STREAMING 0x200 /* hint: sequential, unidirectional */ -#define BUS_DMA_READ 0x400 /* mapping is device -> memory only */ -#define BUS_DMA_WRITE 0x800 /* mapping is memory -> device only */ +#define BUS_DMA_WAITOK 0x0000 /* safe to sleep (pseudo-flag) */ +#define BUS_DMA_NOWAIT 0x0001 /* not safe to sleep */ +#define BUS_DMA_ALLOCNOW 0x0002 /* perform resource allocation now */ +#define BUS_DMA_COHERENT 0x0004 /* hint: map memory DMA coherent */ +#define BUS_DMAMEM_NOSYNC 0x0010 +#define BUS_DMA_BUS1 0x0020 /* placeholders for bus functions... */ +#define BUS_DMA_BUS2 0x0040 +#define BUS_DMA_BUS3 0x0080 +#define BUS_DMA_BUS4 0x0100 +#define BUS_DMA_STREAMING 0x0200 /* hint: sequential, unidirectional */ +#define BUS_DMA_READ 0x0400 /* mapping is device -> memory only */ +#define BUS_DMA_WRITE 0x0800 /* mapping is memory -> device only */ +#define BUS_DMA_ZERO 0x1000 /* zero memory in dmamem_alloc */ /* Forwards needed by prototypes below. */ struct mbuf; |