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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/include | |
| 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/include')
| -rw-r--r-- | sys/ia64/include/vmparam.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/sys/ia64/include/vmparam.h b/sys/ia64/include/vmparam.h index 69480a3..07fd4fb 100644 --- a/sys/ia64/include/vmparam.h +++ b/sys/ia64/include/vmparam.h @@ -134,6 +134,17 @@ #define IA64_PHYS_TO_RR7(x) ((x) | IA64_RR_BASE(7)) /* + * Page size of the identity mappings in region 7. + */ +#ifndef LOG2_ID_PAGE_SIZE +#define LOG2_ID_PAGE_SIZE 28 /* 256M */ +#endif + +#define IA64_ID_PAGE_SHIFT (LOG2_ID_PAGE_SIZE) +#define IA64_ID_PAGE_SIZE (1<<(LOG2_ID_PAGE_SIZE)) +#define IA64_ID_PAGE_MASK (IA64_ID_PAGE_SIZE-1) + +/* * Mach derived constants */ |
