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Reclaim .iram areas in DRAM by overlapping their load addresses with the uninitialized data sections. I did what I could test out-- not any flash image linker scripts or other target processors. Move any .iram copies in crt0.S's to be the first operation even if not _strictly_ necessary to be emphatic (aka. 'beware').

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@20061 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Michael Sevakis 2009-02-20 02:33:40 +00:00
parent 07ae1e4fb9
commit ec67912b63
11 changed files with 76 additions and 65 deletions
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21
firmware/target/coldfire/crt0.S
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@ -234,15 +234,8 @@ start:
movec.l %d0,%acr1
#ifndef BOOTLOADER
/* zero out .ibss */
lea _iedata,%a2
lea _iend,%a4
bra.b .iedatastart
.iedataloop:
clr.l (%a2)+
.iedatastart:
cmp.l %a2,%a4
bhi.b .iedataloop
/* .iram copy is done first since it is reclaimed for other
* uninitialized sections */
/* copy the .iram section */
lea _iramcopy,%a2
@ -254,6 +247,16 @@ start:
.iramstart:
cmp.l %a3,%a4
bhi.b .iramloop
/* zero out .ibss */
lea _iedata,%a2
lea _iend,%a4
bra.b .iedatastart
.iedataloop:
clr.l (%a2)+
.iedatastart:
cmp.l %a2,%a4
bhi.b .iedataloop
#endif /* !BOOTLOADER */
#ifdef IRIVER_H300_SERIES