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[Bug 1001572] New: Separate FIQ and IRQ management
- From: bugzilla-daemon at bugs dot ecos dot sourceware dot org
- To: unassigned at bugs dot ecos dot sourceware dot org
- Date: Mon, 23 Apr 2012 17:22:13 +0100
- Subject: [Bug 1001572] New: Separate FIQ and IRQ management
- Auto-submitted: auto-generated
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Summary: Separate FIQ and IRQ management
Product: eCos
Version: CVS
Platform: All
OS/Version: ARM
Status: NEW
Severity: enhancement
Priority: low
Component: HAL
AssignedTo: unassigned@bugs.ecos.sourceware.org
ReportedBy: nickg@ecoscentric.com
CC: ecos-bugs@ecos.sourceware.org
Class: Advice Request
Created an attachment (id=1712)
--> (http://bugs.ecos.sourceware.org/attachment.cgi?id=1712)
FIQ patch
This patch implements the separation of FIQ and IRQ in eCos critical sections.
The default is to continue disabling both FIQ and IRQ as at present. If
CYGOPT_HAL_ARM_FIQ_DISABLE is switched off then eCos will only manipulate IRQs
in HAL_DISABLE|ENABLE|RESTORE_INTERRUPTS FIQs will be untouched. This puts FIQs
entirely outside eCos, they cannot interact with the kernel through standard
means, and any FIQ handler must be written to run directly from the VSR, it
cannot be installed via the usual interrupt API.
To make FIQs easy to control, if FIQ and IRQ are separated, a set of FIQ
control macros, HAL_DISABLE|ENABLE|RESTORE|QUERY_FIQ, are enabled.
I'll check this in in a few days if nobody has any objections.
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