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authorThomas Martitz <kugel@rockbox.org>2012-01-04 18:07:21 +0100
committerThomas Martitz <kugel@rockbox.org>2012-01-22 18:46:44 +0100
commit991ae1e39553172a7dd6cd8c634aebfce892e261 (patch)
tree672a4583af663def399c4fefdbad060605397fbc /firmware/target/mips/ingenic_jz47xx
parenteaa83bd64775b87e943d345e2810deed44408776 (diff)
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Create fimrware/asm directory for assembly optimized stuff.
This dir is suitable for stuff that doesn't fit the target tree, e.g. because it also builds on hosted or otherwise. It also has a generic subfolder for fallback C implementations so that not all archs need to provide asm files. SOURCES should only contain "foo.c" where foo.c includes the specific <arch>/foo.c files from the subdirs using the preprocessor. This way automatic selection of asm versions or generic C verion is possible. For the start, the thread support files are moved, since ASM threads can be used on hosted platforms as well. Since core_sleep() remains platform specific it's moved to the corresponding system.h headers. Change-Id: Iebff272f3407a6eaafeb7656ceb0ae9eca3f7cb9
Diffstat (limited to 'firmware/target/mips/ingenic_jz47xx')
-rw-r--r--firmware/target/mips/ingenic_jz47xx/system-target.h24
1 files changed, 24 insertions, 0 deletions
diff --git a/firmware/target/mips/ingenic_jz47xx/system-target.h b/firmware/target/mips/ingenic_jz47xx/system-target.h
index caf1733158..1c2e7d7173 100644
--- a/firmware/target/mips/ingenic_jz47xx/system-target.h
+++ b/firmware/target/mips/ingenic_jz47xx/system-target.h
@@ -97,4 +97,28 @@ void dma_disable(void);
#define DMA_IRQ(n) (IRQ_DMA_0 + (n))
#define GPIO_IRQ(n) (IRQ_GPIO_0 + (n))
+/*---------------------------------------------------------------------------
+ * Put core in a power-saving state.
+ *---------------------------------------------------------------------------
+ */
+static inline void core_sleep(void)
+{
+#if CONFIG_CPU == JZ4732
+ __cpm_idle_mode();
+#endif
+ asm volatile(".set mips32r2 \n"
+ "mfc0 $8, $12 \n" /* mfc t0, $12 */
+ "move $9, $8 \n" /* move t1, t0 */
+ "la $10, 0x8000000 \n" /* la t2, 0x8000000 */
+ "or $8, $8, $10 \n" /* Enable reduced power mode */
+ "mtc0 $8, $12 \n" /* mtc t0, $12 */
+ "wait \n"
+ "mtc0 $9, $12 \n" /* mtc t1, $12 */
+ ".set mips0 \n"
+ ::: "t0", "t1", "t2"
+ );
+ enable_irq();
+}
+
+
#endif /* __SYSTEM_TARGET_H_ */