Scott Long 5193a34646 Implement bus_dmamem_alloc_size() and bus_dmamem_free_size() as ... counterparts to bus_dmamem_alloc() and bus_dmamem_free(). This allows the caller to specify the size of the allocation instead of it defaulting to the max_size field of the busdma tag. This is intended to aid in converting drivers to busdma. Lots of hardware cannot understand scatter/gather lists, which forces the driver to copy the i/o buffers to a single contiguous region before sending it to the hardware. Without these new methods, this would require a new busdma tag for each operation, or a complex internal allocator/cache for each driver. Allocations greater than PAGE_SIZE are rounded up to the next PAGE_SIZE by contigmalloc(), so this is not suitable for multiple static allocations that would be better served by a single fixed-length subdivided allocation. Reviewed by: jake (sparc64)		2003-01-29 07:25:27 +00:00
..
pc	use __packed.	2002-09-23 18:54:32 +00:00
_inttypes.h	Since printf(3) now supports the `j' conversion specifier, use that	2002-06-30 05:48:03 +00:00
_limits.h	MB_LEN_MAX is not MD, move it to the MI limits.h.	2002-12-22 06:38:45 +00:00
_stdint.h	Create a new header <machine/_stdint.h> for storing MD parts of	2002-07-29 17:41:23 +00:00
_types.h	Move several MI types from <machine/_types.h> to <sys/_types.h>.	2002-08-23 16:49:06 +00:00
alpha_cpu.h	Use the newer "+" modifier on output contraints when a register or	2002-10-25 20:22:12 +00:00
asm.h	Protect against multiple inclusions.	2003-01-18 23:43:12 +00:00
atomic.h	Remove extranious memory barriers, and correct the placement of a few others.	2002-10-30 01:41:44 +00:00
bootinfo.h
bus_memio.h
bus_pio.h
bus.h	Implement bus_dmamem_alloc_size() and bus_dmamem_free_size() as	2003-01-29 07:25:27 +00:00
bwx.h
chipset.h
clock.h
clockvar.h
cpu.h	Add getcontext, setcontext, and swapcontext as system calls.	2002-11-16 06:35:53 +00:00
cpuconf.h
cpufunc.h	Stage-2 commit of the critical*() code. This re-inlines cpu_critical_enter()	2002-04-01 23:51:23 +00:00
critical.h	Stage-2 commit of the critical*() code. This re-inlines cpu_critical_enter()	2002-04-01 23:51:23 +00:00
db_machdep.h
elf.h	Move the definition of ElfN_Hashelt to common headers. The only platform	2002-05-30 08:32:18 +00:00
endian.h	Be careful not to define GCC-specific optimizations in the non-GCC	2002-09-23 04:32:17 +00:00
exec.h
float.h
floatingpoint.h
fpu.h	Add getcontext, setcontext, and swapcontext as system calls.	2002-11-16 06:35:53 +00:00
frame.h
ieee.h
ieeefp.h
in_cksum.h
inst.h
intr.h
intrcnt.h
ioctl_bt848.h
ioctl_meteor.h
kse.h	Add files that are new for KSE.	2002-06-29 07:04:59 +00:00
limits.h	MB_LEN_MAX is not MD, move it to the MI limits.h.	2002-12-22 06:38:45 +00:00
md_var.h	Split 4.x and 5.x signal handling so that we can keep 4.x signal	2002-10-25 19:10:58 +00:00
mutex.h
pal.h
param.h	Initiate deorbit burn for the i386-only a.out related support. Moves are	2002-09-17 01:49:00 +00:00
pcb.h	The a.out md_coredump stuff isn't referenced anywhere anymore, and	2002-10-15 00:02:50 +00:00
pcpu.h
pmap.h	o Introduce pmap_page_is_mapped(). Its purpose is to obsolete	2002-08-07 18:03:00 +00:00
proc.h	- Split the unaligned access check flags out of md_flags in struct mdthread	2002-07-31 19:37:03 +00:00
profile.h
prom.h
pte.h
ptrace.h
reg.h	Renamed poorly named setregs to exec_setregs. Moved its prototype to	2002-08-29 06:17:48 +00:00
reloc.h
resource.h
rpb.h
runq.h	Move the "- 1" into the RQB_FFS(mask) macro itself so that	2002-06-20 06:21:20 +00:00
setjmp.h	Fix namespace issues by using visibility conditionals from	2002-10-05 05:47:56 +00:00
sgmap.h
sigframe.h	Split 4.x and 5.x signal handling so that we can keep 4.x signal	2002-10-25 19:10:58 +00:00
signal.h	Add getcontext, setcontext, and swapcontext as system calls.	2002-11-16 06:35:53 +00:00
smp.h
stdarg.h	o Add conditionals to allow va_list to be defined in other headers.	2002-10-06 22:01:07 +00:00
swiz.h
sysarch.h
ucontext.h	Add getcontext, setcontext, and swapcontext as system calls.	2002-11-16 06:35:53 +00:00
varargs.h	Add conditionals to allow va_list to be defined in other headers.	2002-10-06 22:02:06 +00:00
vmparam.h	- Enable the use of UMA_MD_PAGE_ALLOC on alpha.	2002-11-01 03:34:51 +00:00