physalloc, physfree, phystag, physinit, physallocdump - kernel buddy allocator for physical addresses

..
B
void physinit(uintmem pa, u64int size)
B
uintmem physalloc(u64int size, int *colorp, void *tag)
B
void* phystag(uintmem pa)
B
void physfree(uintmem pa, u64int size)
B
char* seprintphysstats(char *s, char *e)
 DESCRIPTION
The kernel contains a buddy allocator to hand out large chunks of
memory outside the kernel heap. The buddy allocator does not
assign virtual addresses. The map is populated by one or more calls to
 physinit .  Physalloc allocates a region of the given color with the given tag. If the color
is -1, then any memory color may be used, otherwise only memory
of the given color will be allocated. The
 tag is user-defined. Calls to
 phystag map addresses in the allocation back to
 tag . Allocated regions are freed with
 physfree . Stats may be put in a buffer with
 seprintstats , which takes a pointer to a buffer and its end as
 seprint . 
 SOURCE
 /sys/src/9k/k10/physalloc.c 
 "SEE ALSO"
 qmalloc (9k),