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| author | Luca Dariz <luca@orpolo.org> | 2023-02-12 18:28:14 +0100 |
|---|---|---|
| committer | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2023-02-12 18:54:38 +0100 |
| commit | 5c2f82deeba84394c621b2d98ce7d73489c88ac3 (patch) | |
| tree | a27049ee1acdc1037c02bfa56051c631b1fa8682 /i386/intel/pmap.h | |
| parent | fccebe66ff8cbcae6e30f6c1cfbff34d9e2a151e (diff) | |
| download | gnumach-5c2f82deeba84394c621b2d98ce7d73489c88ac3.tar.gz gnumach-5c2f82deeba84394c621b2d98ce7d73489c88ac3.tar.bz2 gnumach-5c2f82deeba84394c621b2d98ce7d73489c88ac3.zip | |
use L4 page table directly on x86_64 instead of short-circuiting to pdpbase
This is a preparation to run the kernel on high addresses, where the
user vm region and the kernel vm region will use different L3 page
tables.
* i386/intel/pmap.c: on x86_64, retrieve the value of pdpbase from the
L4 table, and add the pmap_pdp() helper (useful also for PAE).
* i386/intel/pmap.h: remove pdpbase on x86_64.
Message-Id: <20230212172818.1511405-6-luca@orpolo.org>
Diffstat (limited to 'i386/intel/pmap.h')
| -rw-r--r-- | i386/intel/pmap.h | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/i386/intel/pmap.h b/i386/intel/pmap.h index 92247faa..1c6a0d30 100644 --- a/i386/intel/pmap.h +++ b/i386/intel/pmap.h @@ -182,16 +182,17 @@ typedef volatile long cpu_set; /* set of CPUs - must be <= 32 */ struct pmap { #if ! PAE pt_entry_t *dirbase; /* page directory table */ -#else - pt_entry_t *pdpbase; /* page directory pointer table */ -#endif /* ! PAE */ +#else /* PAE */ #ifdef __x86_64__ pt_entry_t *l4base; /* l4 table */ #ifdef MACH_HYP pt_entry_t *user_l4base; /* Userland l4 table */ pt_entry_t *user_pdpbase; /* Userland l4 table */ #endif /* MACH_HYP */ +#else /* x86_64 */ + pt_entry_t *pdpbase; /* page directory pointer table */ #endif /* x86_64 */ +#endif /* PAE */ int ref_count; /* reference count */ decl_simple_lock_data(,lock) /* lock on map */ |