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author | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2012-01-04 00:14:45 +0000 |
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committer | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2012-01-04 00:14:45 +0000 |
commit | 10b9a1fa0c8d68bb7f2c6fac7176669052831401 (patch) | |
tree | 7b8e16865ed3a998f215f9fc53a0db979b4f3b97 /nuttx/Documentation | |
parent | 6ab3a2a10626f28693ff0b7db7c41e5b9e760131 (diff) | |
download | px4-nuttx-10b9a1fa0c8d68bb7f2c6fac7176669052831401.tar.gz px4-nuttx-10b9a1fa0c8d68bb7f2c6fac7176669052831401.tar.bz2 px4-nuttx-10b9a1fa0c8d68bb7f2c6fac7176669052831401.zip |
Fix an issue for architectures where interrupt numbers and vector numbers do not match 1-to-1
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4258 42af7a65-404d-4744-a932-0658087f49c3
Diffstat (limited to 'nuttx/Documentation')
-rw-r--r-- | nuttx/Documentation/NuttxPortingGuide.html | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/nuttx/Documentation/NuttxPortingGuide.html b/nuttx/Documentation/NuttxPortingGuide.html index b0a7a243c..7ef4e522a 100644 --- a/nuttx/Documentation/NuttxPortingGuide.html +++ b/nuttx/Documentation/NuttxPortingGuide.html @@ -3554,6 +3554,15 @@ void (*notify)(FAR struct pm_callback_s *cb, enum pm_state_e pmstate); <li><code>CONFIG_ARCH_NOINTC</code>: Define if the architecture does not support an interrupt controller or otherwise cannot support APIs like up_enable_irq() and up_disable_irq().</li> + <li><code>CONFIG_ARCH_VECNOTIRQ</code>: + Usually the interrupt vector number provided to interfaces like <code>irq_attach()</code> + and <code>irq_detach</code> are the same as IRQ numbers that are provied to IRQ + management functions like <code>up_enable_irq()</code> and <code>up_disable_irq()</code>. + But that is not true for all interrupt controller implementations. For example, the + PIC32MX interrupt controller manages interrupt sources that have a many-to-one + relationship to interrupt vectors. + In such cases, <code>CONFIG_ARCH_VECNOTIRQ</code> must defined so that the OS logic + will know not to assume it can use a vector number to enable or disable interrupts. <li><code>CONFIG_ARCH_IRQPRIO</code>: Define if the architecture supports prioritization of interrupts and the up_prioritize_irq() API.</li> |