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

11 files changed, 25 insertions, 20 deletions

diff --git a/apps/plugins/plugin.lds b/apps/plugins/plugin.lds
index aea44e7d40..7037496be4 100644
--- a/apps/plugins/plugin.lds
+++ b/apps/plugins/plugin.lds
@@ -159,9 +159,10 @@ OUTPUT_FORMAT(elf32-littlemips)
 
 #elif CONFIG_CPU==S5L8702
 /* S5L8702 have 256KB of IRAM */
+/* IRAM1 (2nd 128KB block) is not used because it is slower than DRAM */
 #define DRAMORIG 0x08000000
-#define IRAMORIG (0x00000000 + (56*1024))
-#define IRAMSIZE (200*1024)
+#define IRAMORIG (0x00000000 + (48*1024))
+#define IRAMSIZE (80*1024)
 
 #elif CONFIG_CPU == JZ4732 || CONFIG_CPU == JZ4760B
 #undef STUBOFFSET
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)
diff --git a/firmware/target/arm/s5l8702/pcm-s5l8702.c b/firmware/target/arm/s5l8702/pcm-s5l8702.c
index e053b309b7..86a0edd54a 100644
--- a/firmware/target/arm/s5l8702/pcm-s5l8702.c
+++ b/firmware/target/arm/s5l8702/pcm-s5l8702.c
@@ -207,7 +207,6 @@ void pcm_dma_apply_settings(void)
 
 void pcm_play_dma_init(void)
 {
-    PWRCON(0) &= ~(1 << 4);
     PWRCON(1) &= ~(1 << 7);
 
     dmac_ch_init(&dma_play_ch, &dma_play_ch_cfg);
@@ -406,7 +405,6 @@ void pcm_rec_dma_init(void)
     if (pcm_rec_initialized)
         return;
 
-    PWRCON(0) &= ~(1 << 4);
     PWRCON(1) &= ~(1 << 7);
 
     dmac_ch_init(&dma_rec_ch, &dma_rec_ch_cfg);
diff --git a/firmware/target/arm/s5l8702/system-s5l8702.c b/firmware/target/arm/s5l8702/system-s5l8702.c
index 459f4c36c6..9257aff85a 100644
--- a/firmware/target/arm/s5l8702/system-s5l8702.c
+++ b/firmware/target/arm/s5l8702/system-s5l8702.c
@@ -199,6 +199,9 @@ enum {
 
 void system_init(void)
 {
+    /* disable IRAM1 (not used because it is slower than DRAM) */
+    clockgate_enable(CLOCKGATE_SM1, false);
+
     clocking_init(clk_modes, 0);
 #ifndef BOOTLOADER
     gpio_preinit();
diff --git a/lib/rbcodec/codecs/libcook/cook.h b/lib/rbcodec/codecs/libcook/cook.h
index fcb437a0e1..c2a5357c98 100644
--- a/lib/rbcodec/codecs/libcook/cook.h
+++ b/lib/rbcodec/codecs/libcook/cook.h
@@ -29,15 +29,16 @@
 
 #include "codeclib.h"
 
-#if (CONFIG_CPU == PP5022) || (CONFIG_CPU == PP5024) || (CONFIG_CPU == MCF5250)
-/* PP5022/24, MCF5250 have large IRAM */
+#if (CONFIG_CPU == PP5022) || (CONFIG_CPU == PP5024) || \
+    (CONFIG_CPU == MCF5250) || (CONFIG_CPU == S5L8702)
+/* PP5022/24, S5L8702, MCF5250 have large IRAM */
 #define IBSS_ATTR_COOK_LARGE_IRAM    IBSS_ATTR
 #define ICODE_ATTR_COOK_LARGE_IRAM   ICODE_ATTR
 #define ICONST_ATTR_COOK_LARGE_IRAM  ICONST_ATTR
 #define IBSS_ATTR_COOK_VLCBUF
 #define ICODE_ATTR_COOK_DECODE
 
-#elif defined(CPU_S5L870X)
+#elif (CONFIG_CPU == S5L8700) || (CONFIG_CPU == S5L8701)
 /* S5L870X have even larger IRAM and it is faster to use ICODE_ATTR. */
 #define IBSS_ATTR_COOK_LARGE_IRAM    IBSS_ATTR
 #define ICODE_ATTR_COOK_LARGE_IRAM   ICODE_ATTR
diff --git a/lib/rbcodec/codecs/libfaad/common.h b/lib/rbcodec/codecs/libfaad/common.h
index 720042b4aa..c5eaa0aa51 100644
--- a/lib/rbcodec/codecs/libfaad/common.h
+++ b/lib/rbcodec/codecs/libfaad/common.h
@@ -58,14 +58,14 @@ extern struct codec_api* ci;
 #define ICONST_ATTR_FAAD_LARGE_IRAM ICONST_ATTR
 #define IBSS_ATTR_FAAD_XLR
 
-#elif (CONFIG_CPU == PP5022) || (CONFIG_CPU == PP5024)
+#elif (CONFIG_CPU == PP5022) || (CONFIG_CPU == PP5024) || (CONFIG_CPU == S5L8702)
 /* Enough IRAM to move additional data and code to it. */
 #define IBSS_ATTR_FAAD_LARGE_IRAM   IBSS_ATTR
 #define ICODE_ATTR_FAAD_LARGE_IRAM  ICODE_ATTR
 #define ICONST_ATTR_FAAD_LARGE_IRAM ICONST_ATTR
 #define IBSS_ATTR_FAAD_XLR
 
-#elif defined(CPU_S5L870X)
+#elif (CONFIG_CPU == S5L8700) || (CONFIG_CPU == S5L8701)
 /* Very large IRAM. Move even more data to it. */
 #define IBSS_ATTR_FAAD_LARGE_IRAM   IBSS_ATTR
 #define ICODE_ATTR_FAAD_LARGE_IRAM  ICODE_ATTR
diff --git a/lib/rbcodec/codecs/libffmpegFLAC/bitstream.h b/lib/rbcodec/codecs/libffmpegFLAC/bitstream.h
index 2ec54c42fa..cd9589de40 100644
--- a/lib/rbcodec/codecs/libffmpegFLAC/bitstream.h
+++ b/lib/rbcodec/codecs/libffmpegFLAC/bitstream.h
@@ -18,14 +18,15 @@
   #define ICODE_ATTR
 #endif
 
-#if (CONFIG_CPU == MCF5250) || (CONFIG_CPU == PP5022) || (CONFIG_CPU == PP5024)
+#if (CONFIG_CPU == MCF5250) || (CONFIG_CPU == PP5022) || \
+    (CONFIG_CPU == PP5024) || (CONFIG_CPU == S5L8702)
 #define ICODE_ATTR_FLAC ICODE_ATTR
 #define IBSS_ATTR_FLAC  IBSS_ATTR
 /* Enough IRAM to move additional data to it. */
 #define IBSS_ATTR_FLAC_LARGE_IRAM   IBSS_ATTR
 #define IBSS_ATTR_FLAC_XLARGE_IRAM
 
-#elif defined(CPU_S5L870X)
+#elif (CONFIG_CPU == S5L8700) || (CONFIG_CPU == S5L8701)
 #define ICODE_ATTR_FLAC ICODE_ATTR
 #define IBSS_ATTR_FLAC  IBSS_ATTR
 /* Enough IRAM to move even more additional data to it. */
diff --git a/lib/rbcodec/codecs/libmusepack/mpcdec.h b/lib/rbcodec/codecs/libmusepack/mpcdec.h
index 02003cb01b..24c06bc4a0 100644
--- a/lib/rbcodec/codecs/libmusepack/mpcdec.h
+++ b/lib/rbcodec/codecs/libmusepack/mpcdec.h
@@ -58,7 +58,7 @@ extern "C" {
 /* Keep the data arrays of bitsreadr.c in IRAM. */
 #define ICONST_ATTR_MPC_BITSREADER ICONST_ATTR
 
-#elif (CONFIG_CPU == PP5022) || (CONFIG_CPU == PP5024)
+#elif (CONFIG_CPU == PP5022) || (CONFIG_CPU == PP5024) || (CONFIG_CPU == S5L8702)
 /* Enough IRAM to move additional data and code to it. */
 #define IBSS_ATTR_MPC_LARGE_IRAM   IBSS_ATTR
 #define ICODE_ATTR_MPC_LARGE_IRAM  ICODE_ATTR
@@ -70,7 +70,7 @@ extern "C" {
  * sv7/sv8 bitstream demuxing into IRAM. This config is faster. */
 #define ICONST_ATTR_MPC_BITSREADER
 
-#elif defined(CPU_S5L870X)
+#elif (CONFIG_CPU == S5L8700) || (CONFIG_CPU == S5L8701)
 /* Enough IRAM to move additional data and code to it. */
 #define IBSS_ATTR_MPC_LARGE_IRAM   IBSS_ATTR
 #define ICODE_ATTR_MPC_LARGE_IRAM  ICODE_ATTR
diff --git a/lib/rbcodec/codecs/libspc/spc_codec.h b/lib/rbcodec/codecs/libspc/spc_codec.h
index 446690f726..75c344474e 100644
--- a/lib/rbcodec/codecs/libspc/spc_codec.h
+++ b/lib/rbcodec/codecs/libspc/spc_codec.h
@@ -95,7 +95,7 @@
 /* Not enough IRAM available to move further data to it. */
 #define IBSS_ATTR_SPC_LARGE_IRAM
 
-#elif (CONFIG_CPU == PP5022) || (CONFIG_CPU == PP5024)
+#elif (CONFIG_CPU == PP5022) || (CONFIG_CPU == PP5024) || (CONFIG_CPU == S5L8702)
 #define IBSS_ATTR_SPC               IBSS_ATTR
 #define ICODE_ATTR_SPC              ICODE_ATTR
 #define ICONST_ATTR_SPC             ICONST_ATTR
@@ -103,7 +103,7 @@
 /* Not enough IRAM available to move further data to it. */
 #define IBSS_ATTR_SPC_LARGE_IRAM
 
-#elif defined(CPU_S5L870X)
+#elif (CONFIG_CPU == S5L8700) || (CONFIG_CPU == S5L8701)
 #define IBSS_ATTR_SPC               IBSS_ATTR
 #define ICODE_ATTR_SPC              ICODE_ATTR
 #define ICONST_ATTR_SPC             ICONST_ATTR
diff --git a/lib/rbcodec/codecs/libwma/wmadec.h b/lib/rbcodec/codecs/libwma/wmadec.h
index 76429dede1..b3bca4f452 100644
--- a/lib/rbcodec/codecs/libwma/wmadec.h
+++ b/lib/rbcodec/codecs/libwma/wmadec.h
@@ -52,13 +52,14 @@
 #define LSP_POW_BITS 7
 
 
-#if (CONFIG_CPU == PP5022) || (CONFIG_CPU == PP5024) || (CONFIG_CPU == MCF5250)
+#if (CONFIG_CPU == PP5022) || (CONFIG_CPU == PP5024) || \
+    (CONFIG_CPU == MCF5250) || (CONFIG_CPU == S5L8702)
 /* PP5022/24 and MCF5250 have 128KB of IRAM. 80KB are allocated for codecs */
 #define IBSS_ATTR_WMA_LARGE_IRAM IBSS_ATTR
 #define IBSS_ATTR_WMA_XL_IRAM
 #define ICONST_ATTR_WMA_XL_IRAM
 
-#elif defined(CPU_S5L870X)
+#elif (CONFIG_CPU == S5L8700) || (CONFIG_CPU == S5L8701)
 /* S5L870x has even more IRAM. Use it. */
 #define IBSS_ATTR_WMA_LARGE_IRAM IBSS_ATTR
 #define IBSS_ATTR_WMA_XL_IRAM    IBSS_ATTR
diff --git a/lib/rbcodec/codecs/libwmapro/wmaprodec.h b/lib/rbcodec/codecs/libwmapro/wmaprodec.h
index d8398fc9f1..46b4770f46 100644
--- a/lib/rbcodec/codecs/libwmapro/wmaprodec.h
+++ b/lib/rbcodec/codecs/libwmapro/wmaprodec.h
@@ -10,7 +10,7 @@
 #define IBSS_ATTR_WMAPRO_VLC_TABLES
 #define ICONST_ATTR_WMAPRO_WIN_VS_TMP
 
-#elif (CONFIG_CPU == PP5022) || (CONFIG_CPU == PP5024)
+#elif (CONFIG_CPU == PP5022) || (CONFIG_CPU == PP5024) || (CONFIG_CPU == S5L8702)
 /* Enough IRAM to move additional data and code to it. */
 #define IBSS_ATTR_WMAPRO_LARGE_IRAM   IBSS_ATTR
 #define ICODE_ATTR_WMAPRO_LARGE_IRAM  ICODE_ATTR
@@ -18,7 +18,7 @@
 #define IBSS_ATTR_WMAPRO_VLC_TABLES
 #define ICONST_ATTR_WMAPRO_WIN_VS_TMP
 
-#elif defined(CPU_S5L870X)
+#elif (CONFIG_CPU == S5L8700) || (CONFIG_CPU == S5L8701)
 /* Enough IRAM to move additional data and code to it. */
 #define IBSS_ATTR_WMAPRO_LARGE_IRAM   IBSS_ATTR
 #define ICODE_ATTR_WMAPRO_LARGE_IRAM  ICODE_ATTR