atj213x: Simple test exploring irq handling

This test software setups timer T0 periodic interrupt.
In ISR it changes backlight level. The interrupt handler
does not support nesting and the whole ISR is run in interrupt
context. Exceptions are not handled yet.

Change-Id: Idc5d622991c7257b4577448d8be08ddd1c24c745

1 files changed, 41 insertions, 0 deletions

diff --git a/utils/atj2137/adfuload/test_binary/timer_irq/system-atj213x.c b/utils/atj2137/adfuload/test_binary/timer_irq/system-atj213x.c
new file mode 100644
index 0000000000..b93262579e
--- /dev/null
+++ b/utils/atj2137/adfuload/test_binary/timer_irq/system-atj213x.c
@@ -0,0 +1,41 @@
+#define default_interrupt(name) \
+  extern __attribute__((weak,alias("UIRQ"))) void name (void)
+
+default_interrupt(INT_MCA);
+default_interrupt(INT_SD);
+default_interrupt(INT_MHA);
+/* default_interrupt(INT_USB); seems wrong */
+default_interrupt(INT_DSP);
+default_interrupt(INT_PCNT);
+default_interrupt(INT_WD);
+default_interrupt(INT_T1);
+default_interrupt(INT_T0);
+default_interrupt(INT_RTC);
+default_interrupt(INT_DMA);
+default_interrupt(INT_KEY);
+default_interrupt(INT_EXT);
+default_interrupt(INT_IIC2);
+default_interrupt(INT_IIC1);
+default_interrupt(INT_ADC);
+default_interrupt(INT_DAC);
+default_interrupt(INT_NAND);
+default_interrupt(INT_YUV);
+
+/* this will be panicf() on regular rockbox fw */
+static void UIRQ(void)
+{
+    while(1);
+}
+
+/* TRICK ALERT !!!!
+ * The table is organized in reversed order so
+ * clz on INTC_PD returns the index in this table
+ */
+void (* const irqvector[])(void) __attribute__((used)) =
+{
+    UIRQ, UIRQ, UIRQ, UIRQ, UIRQ, INT_YUV, UIRQ, INT_NAND,
+    UIRQ, INT_DAC, INT_ADC, UIRQ, UIRQ, INT_IIC1, INT_IIC2, UIRQ,
+    UIRQ, INT_EXT, INT_KEY, INT_DMA, INT_RTC, INT_T0, INT_T1, INT_WD,
+    INT_PCNT, UIRQ, INT_DSP, UIRQ, INT_MHA, INT_SD, UIRQ, INT_MCA
+};
+