diff options
Diffstat (limited to 'nuttx/arch/z16/src/common/up_doirq.c')
| -rw-r--r-- | nuttx/arch/z16/src/common/up_doirq.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/nuttx/arch/z16/src/common/up_doirq.c b/nuttx/arch/z16/src/common/up_doirq.c index 670e6985d..9964f4432 100644 --- a/nuttx/arch/z16/src/common/up_doirq.c +++ b/nuttx/arch/z16/src/common/up_doirq.c @@ -90,6 +90,15 @@ FAR chipreg_t *up_doirq(int irq, FAR chipreg_t *regs) { FAR chipreg_t *savestate; + /* Nested interrupts are not supported in this implementation. If + * you want to implement nested interrupts, you would have to (1) change + * the way that current_regs is handled and (2) the design associated + * with CONFIG_ARCH_INTERRUPTSTACK. The savestate variable will not + * work for that purpose as implemented here because only the outermost + * nested interrupt can result in a context switch (it can probably be + * deleted). + */ + /* Current regs non-zero indicates that we are processing * an interrupt; current_regs is also used to manage * interrupt level context switches. |