Author: imp
Date: Fri Jan 31 23:28:18 2014
New Revision: 261337
URL: http://svnweb.freebsd.org/changeset/base/261337
Log:
Minor cleanup of comments.
Modified:
head/sys/arm/at91/at91_machdep.c
Modified: head/sys/arm/at91/at91_machdep.c
==============================================================================
--- head/sys/arm/at91/at91_machdep.c Fri Jan 31 23:18:30 2014
(r261336)
+++ head/sys/arm/at91/at91_machdep.c Fri Jan 31 23:28:18 2014
(r261337)
@@ -131,15 +131,12 @@ struct pv_addr kernelstack;
/* Static device mappings. */
const struct arm_devmap_entry at91_devmap[] = {
/*
- * Map the on-board devices VA == PA so that we can access them
- * with the MMU on or off.
+ * Map the critical on-board devices. The interrupt vector at
+ * 0xffff0000 makes it impossible to map them PA == VA, so we map all
+ * 0xfffxxxxx addresses to 0xdffxxxxx. This covers all critical devices
+ * on all members of the AT91SAM9 and AT91RM9200 families.
*/
{
- /*
- * This at least maps the interrupt controller, the UART
- * and the timer. Other devices should use newbus to
- * map their memory anyway.
- */
0xdff00000,
0xfff00000,
0x00100000,
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