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Do not use pv_kva on ARMv6/v7 and save some space on each vm_page. It's only

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relevant for older ARM variants (with virtual cache).

Submitted by:	Zbigniew Bodek <zbb@semihalf.com>
Reviewed by:	gber
Sponsored by:	The FreeBSD Foundation, Semihalf
This commit is contained in:
Rafal Jaworowski 2013-08-19 16:16:49 +00:00
parent ec34d19b9d
commit 836f82ff43
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=254536
2 changed files with 3 additions and 1 deletions
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2
sys/arm/arm/pmap-v6.c
View File

@ -4365,6 +4365,6 @@ pmap_page_set_memattr(vm_page_t m, vm_memattr_t ma)
* uncacheable, being careful to sync caches and PTEs (and maybe
* invalidate TLB?) for any current mapping it modifies.
*/
if (m->md.pv_kva != 0 || TAILQ_FIRST(&m->md.pv_list) != NULL)
if (TAILQ_FIRST(&m->md.pv_list) != NULL)
panic("Can't change memattr on page with existing mappings");
}

2
sys/arm/include/pmap.h
View File

@ -121,7 +121,9 @@ struct pv_chunk;
struct md_page {
int pvh_attrs;
vm_memattr_t pv_memattr;
#if (ARM_MMU_V6 + ARM_MMU_V7) == 0
vm_offset_t pv_kva; /* first kernel VA mapping */
#endif
TAILQ_HEAD(,pv_entry) pv_list;
};