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README.irq @ 762fa62

Last change on this file since 762fa62 was 8f8ccee, checked in by Sebastian Huber <sebastian.huber@…>, on 04/23/18 at 07:50:39

bsps: Move interrupt controller support to bsps

This patch is a part of the BSP source reorganization.

Update #3285.

File size: 810 bytes

Line
1	README.irq : Shuchen Kate Feng <feng1@bnl.gov>, Sept. 2, 2007
2
3	As per implementation in shared PPC code,
4	the BSPirqPrioTable[96] listed in irq_init.c is where the
5	software developers can change the levels of priority
6	for all the interrupts based on the need of their
7	applications. The IRQs can be eanbled dynamically via the
8	BSP_enable_pic_irq(), or disbaled dynamically via the
9	BSP_disable_pic_irq().
10
11
12	Support for run-time priority setup could be
13	added easily, but there is no action taken yet due to concerns
14	over computer security at VME CPU level.
15
16
17	The software developers are forbidden to setup picIsrTable[],
18	as it is a powerful engine for the BSP to find the pending
19	highest priority IRQ at run time. It ensures the fastest/faster
20	interrupt service to the highest/higher priority IRQ, if pending.

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