diff options
Diffstat (limited to 'nuttx/arch/sh/src/common/up_doirq.c')
| -rw-r--r-- | nuttx/arch/sh/src/common/up_doirq.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/nuttx/arch/sh/src/common/up_doirq.c b/nuttx/arch/sh/src/common/up_doirq.c index 717196682..185fa9684 100644 --- a/nuttx/arch/sh/src/common/up_doirq.c +++ b/nuttx/arch/sh/src/common/up_doirq.c @@ -79,6 +79,15 @@ uint32_t *up_doirq(int irq, uint32_t* regs) { uint32_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. |