Thread (55 messages) 55 messages, 8 authors, 2007-10-19

Re: [PATCH 5/15] bootwrapper: occuppied memory ranges

From: David Gibson <hidden>
Date: 2007-09-24 03:09:37

On Fri, Sep 21, 2007 at 06:04:18PM -0500, Milton Miller wrote:
Add a set of library routines to manage gross memory allocations.

This code uses an array in bss to store upto 32 entrys with merging
representing a range of memory below rma_end (aka end of real mode
memory at 0).

To use this code, a platform would set rma_end (find_rma_end), mark
memory ranges occupied (add_known_ranges et al), initialize malloc in
the spaces between (ranges_init_malloc), and optionally use the supplied
vmlinux_alloc may be used.

Signed-off-by: Milton Miller <redacted>
--- 
vs 12172
rename rmo_end to rma_end (real mode area, as used in papr)
removed section labels (now in ops.h)
rediff ops.h, Makefile
moved find_rma_end here (from kexec.c in a later patch)
find_rma_end searches by node type for "memory", checks that
	the parent is the root node, then looks for a reg property
	with the first address/size pair starting at 0.
Urg.  It's an awful lot of code for the bootwrapper.  Am I right in
understanding that the only reason to use the ranges code is for the
ranges based malloc() and vmlinux_alloc() you get out of it?

-- 
David Gibson			| I'll have my music baroque, and my code
david AT gibson.dropbear.id.au	| minimalist, thank you.  NOT _the_ _other_
				| _way_ _around_!
http://www.ozlabs.org/~dgibson
Keyboard shortcuts
hback out one level
jnext message in thread
kprevious message in thread
ldrill in
Escclose help / fold thread tree
?toggle this help