From 744274220833e017f3cc3f1b61abd0fc7c3885ec Mon Sep 17 00:00:00 2001 From: Cástor Muñoz Date: Fri, 13 Jan 2017 20:51:07 +0100 Subject: iPod Classic: disable IRAM1 On Classic, IRAM1 (second 128Kb of a total of 256KB available IRAM) is slower than DRAM. Codecs that actually are using regions of IRAM1 runs faster when DRAM is used, so IRAM1 is disabled and only IRAM0 remains enabled: 48KB for core and 80KB for codecs/plugins. The next test_codec results shows how decode time is decreased: file boosted unboosted *.ra ~1.5% ~0.5% *.mpc ~21% ~4.5% *.ogg ~0.5% ~0% nero_he*.m4a ~8% ~1% nero*.m4a ~25% ~7% wmapro*.wma ~4.5% ~0% wma*.wma ~25% ~7% In addition there is a small power save when IRAM1 HW is disabled. Change-Id: I102adee11458e82037f23076d5d5956e23235de8 --- firmware/target/arm/s5l8702/app.lds | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'firmware/target/arm/s5l8702/app.lds') diff --git a/firmware/target/arm/s5l8702/app.lds b/firmware/target/arm/s5l8702/app.lds index 60ecdc6738..fceb732e4f 100644 --- a/firmware/target/arm/s5l8702/app.lds +++ b/firmware/target/arm/s5l8702/app.lds @@ -19,7 +19,7 @@ STARTUP(target/arm/s5l8702/crt0.o) #define DRAMSIZE (DRAM_SIZE - PLUGINSIZE - CODECSIZE - TTB_SIZE) #define CODECORIG (ENDAUDIOADDR) -#define IRAMSIZE (56*1024) /* 256KB total - 56KB for core, 200KB for codecs */ +#define IRAMSIZE (48*1024) /* 256KB total - 48KB for core, 200KB for codecs */ /* Where the codec buffer ends, and the plugin buffer starts */ #define ENDADDR (ENDAUDIOADDR + CODECSIZE) -- cgit v1.2.3