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as3525v2: Move codec into iram freeing 1MB for the audio buffer and also a small decoding speedup (iram seems to be 50% faster than dram when boosted and the same when unboosed). 32k is still reserved for the core and can be readjusted if needed. Codecs don't appear to ever need the 1MB (usually <350k only).

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@25491 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Thomas Martitz 2010-04-05 19:18:15 +00:00
parent 527a2e64ab
commit 02afc271c9
6 changed files with 18 additions and 14 deletions
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12
firmware/target/arm/as3525/app.lds
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@ -23,8 +23,10 @@ STARTUP(target/arm/crt0.o)
/* End of the audio buffer, where the codec buffer starts */
#define ENDAUDIOADDR (DRAMORIG + DRAMSIZE)
#define CODEC_BUFFER_FILLS_IRAM defined(AMS_LOWMEM) || (CONFIG_CPU == AS3525v2)
#ifdef AMS_LOWMEM
#if CODEC_BUFFER_FILLS_IRAM
/* Entire codec buffer in IRAM */
#define DRAMSIZE (DRAM_SIZE - STUBOFFSET - PLUGINSIZE - TTB_SIZE)
#define CODECORIG (IRAMORIG + (IRAM_SIZE - CODEC_SIZE))
#define IRAMSIZE (IRAM_SIZE - CODEC_SIZE)
@ -36,7 +38,7 @@ STARTUP(target/arm/crt0.o)
/* Where the codec buffer ends, and the plugin buffer starts */
#ifdef AMS_LOWMEM
#if CODEC_BUFFER_FILLS_IRAM
#define ENDADDR (ENDAUDIOADDR)
#else
#define ENDADDR (ENDAUDIOADDR + CODECSIZE)
@ -44,7 +46,7 @@ STARTUP(target/arm/crt0.o)
MEMORY
{
#ifdef AMS_LOWMEM
#if CODEC_BUFFER_FILLS_IRAM
CODEC_IRAM : ORIGIN = CODECORIG, LENGTH = CODEC_SIZE
#endif
IRAM : ORIGIN = IRAMORIG, LENGTH = IRAMSIZE
@ -110,7 +112,7 @@ SECTIONS
_iend = .;
} > IRAM
.init CODECORIG :
.init ENDADDR :
{
. = ALIGN(4);
_initstart = .;
@ -154,7 +156,7 @@ SECTIONS
{
codecbuf = .;
_codecbuf = .;
#ifdef AMS_LOWMEM
#if CODEC_BUFFER_FILLS_IRAM
} > CODEC_IRAM
#else
} > DRAM