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| author | marcel <marcel@FreeBSD.org> | 2003-09-09 05:59:09 +0000 |
|---|---|---|
| committer | marcel <marcel@FreeBSD.org> | 2003-09-09 05:59:09 +0000 |
| commit | bdbd90ef2b540a88abed9f54f7c409d2573f0066 (patch) | |
| tree | ecf9512c5b26488d4f80d4d1784faa6261154a75 /sys/ia64/conf | |
| parent | 53db1769f397482da865abe9484dd6a84689d7cf (diff) | |
| download | FreeBSD-src-bdbd90ef2b540a88abed9f54f7c409d2573f0066.zip FreeBSD-src-bdbd90ef2b540a88abed9f54f7c409d2573f0066.tar.gz | |
Introduce IA64_ID_PAGE_{MASK|SHIFT|SIZE} and LOG2_ID_PAGE_SIZE. The
latter is a kernel option for IA64_ID_PAGE_SHIFT, which in turn
determines IA64_ID_PAGE_MASK and IA64_ID_PAGE_SIZE.
The constants are used instead of the literal hardcoding (in its
various forms) of the size of the direct mappings created in region
6 and 7. The default and probably only workable size is still 256M,
but for kicks we use 128M for LINT.
Diffstat (limited to 'sys/ia64/conf')
| -rw-r--r-- | sys/ia64/conf/NOTES | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/sys/ia64/conf/NOTES b/sys/ia64/conf/NOTES index 544f662..7c05afc 100644 --- a/sys/ia64/conf/NOTES +++ b/sys/ia64/conf/NOTES @@ -23,6 +23,11 @@ cpu ITANIUM2 # ia64. It is based on the ia32 emulation in the processor. options IA32 +# option: LOG2_ID_PAGE_SIZE +# Specify the log2 size of the identity (direct) mappings in regions 6 and 7 +# of the virtual address space. +options LOG2_ID_PAGE_SIZE=27 # 128M + # option: LOG2_PAGE_SIZE # Specify the log2 size of the page to be used for virtual memory management. # The page size being equal to 1<<LOG2_PAGE_SIZE. |
