SWCODEC/IRAM: Save voice IRAM when a plugin initializes its IRAM. Defines two macros for declaring and initializing IRAM. Plugins should use these instead. See mp3_encoder, doom, etc. for details. Further tweaks in buffer restoration after other use. Hiding of some interfaces that should only be used by buffer management.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@11544 a1c6a512-1295-4272-9138-f99709370657

2 files changed, 8 insertions, 0 deletions

diff --git a/firmware/export/audio.h b/firmware/export/audio.h
index 42d94a9158..573252e938 100644
--- a/firmware/export/audio.h
+++ b/firmware/export/audio.h
@@ -101,7 +101,12 @@ void audio_error_clear(void);
 int audio_get_file_pos(void);
 void audio_beep(int duration);
 void audio_init_playback(void);
+/* Required call when audio buffer is require for some other purpose */
 unsigned char *audio_get_buffer(bool talk_buf, size_t *buffer_size);
+#ifdef USE_IRAM
+/* Required call when codec IRAM is needed for some other purpose */
+void audio_iram_steal(void);
+#endif
 
 /* channel modes */
 enum rec_channel_modes
diff --git a/firmware/export/config.h b/firmware/export/config.h
index 440c0faef3..74c7e924ff 100644
--- a/firmware/export/config.h
+++ b/firmware/export/config.h
@@ -283,6 +283,9 @@
 #define IDATA_ATTR      __attribute__ ((section(".idata")))
 #define IBSS_ATTR       __attribute__ ((section(".ibss")))
 #define USE_IRAM
+#if CONFIG_CPU != SH7034
+#define IRAM_STEAL
+#endif
 #else
 #define ICODE_ATTR
 #define ICONST_ATTR