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author | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-02-14 12:46:06 -0500 |
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committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-02-14 12:46:06 -0500 |
commit | 414f827c46973ba39320cfb43feb55a0eeb9b4e8 (patch) | |
tree | 45e860974ef698e71370a0ebdddcff4f14fbdf9e /Documentation/x86_64/mm.txt | |
parent | 86a71dbd3e81e8870d0f0e56b87875f57e58222b (diff) | |
parent | 126b1922367fbe5513daa675a2abd13ed3917f4e (diff) |
Merge branch 'for-linus' of git://one.firstfloor.org/home/andi/git/linux-2.6
* 'for-linus' of git://one.firstfloor.org/home/andi/git/linux-2.6: (94 commits)
[PATCH] x86-64: Remove mk_pte_phys()
[PATCH] i386: Fix broken CONFIG_COMPAT_VDSO on i386
[PATCH] i386: fix 32-bit ioctls on x64_32
[PATCH] x86: Unify pcspeaker platform device code between i386/x86-64
[PATCH] i386: Remove extern declaration from mm/discontig.c, put in header.
[PATCH] i386: Rename cpu_gdt_descr and remove extern declaration from smpboot.c
[PATCH] i386: Move mce_disabled to asm/mce.h
[PATCH] i386: paravirt unhandled fallthrough
[PATCH] x86_64: Wire up compat epoll_pwait
[PATCH] x86: Don't require the vDSO for handling a.out signals
[PATCH] i386: Fix Cyrix MediaGX detection
[PATCH] i386: Fix warning in cpu initialization
[PATCH] i386: Fix warning in microcode.c
[PATCH] x86: Enable NMI watchdog for AMD Family 0x10 CPUs
[PATCH] x86: Add new CPUID bits for AMD Family 10 CPUs in /proc/cpuinfo
[PATCH] i386: Remove fastcall in paravirt.[ch]
[PATCH] x86-64: Fix wrong gcc check in bitops.h
[PATCH] x86-64: survive having no irq mapping for a vector
[PATCH] i386: geode configuration fixes
[PATCH] i386: add option to show more code in oops reports
...
Diffstat (limited to 'Documentation/x86_64/mm.txt')
-rw-r--r-- | Documentation/x86_64/mm.txt | 22 |
1 files changed, 11 insertions, 11 deletions
diff --git a/Documentation/x86_64/mm.txt b/Documentation/x86_64/mm.txt index 133561b9cb0c..f42798ed1c54 100644 --- a/Documentation/x86_64/mm.txt +++ b/Documentation/x86_64/mm.txt | |||
@@ -3,26 +3,26 @@ | |||
3 | 3 | ||
4 | Virtual memory map with 4 level page tables: | 4 | Virtual memory map with 4 level page tables: |
5 | 5 | ||
6 | 0000000000000000 - 00007fffffffffff (=47bits) user space, different per mm | 6 | 0000000000000000 - 00007fffffffffff (=47 bits) user space, different per mm |
7 | hole caused by [48:63] sign extension | 7 | hole caused by [48:63] sign extension |
8 | ffff800000000000 - ffff80ffffffffff (=40bits) guard hole | 8 | ffff800000000000 - ffff80ffffffffff (=40 bits) guard hole |
9 | ffff810000000000 - ffffc0ffffffffff (=46bits) direct mapping of all phys. memory | 9 | ffff810000000000 - ffffc0ffffffffff (=46 bits) direct mapping of all phys. memory |
10 | ffffc10000000000 - ffffc1ffffffffff (=40bits) hole | 10 | ffffc10000000000 - ffffc1ffffffffff (=40 bits) hole |
11 | ffffc20000000000 - ffffe1ffffffffff (=45bits) vmalloc/ioremap space | 11 | ffffc20000000000 - ffffe1ffffffffff (=45 bits) vmalloc/ioremap space |
12 | ... unused hole ... | 12 | ... unused hole ... |
13 | ffffffff80000000 - ffffffff82800000 (=40MB) kernel text mapping, from phys 0 | 13 | ffffffff80000000 - ffffffff82800000 (=40 MB) kernel text mapping, from phys 0 |
14 | ... unused hole ... | 14 | ... unused hole ... |
15 | ffffffff88000000 - fffffffffff00000 (=1919MB) module mapping space | 15 | ffffffff88000000 - fffffffffff00000 (=1919 MB) module mapping space |
16 | 16 | ||
17 | The direct mapping covers all memory in the system upto the highest | 17 | The direct mapping covers all memory in the system up to the highest |
18 | memory address (this means in some cases it can also include PCI memory | 18 | memory address (this means in some cases it can also include PCI memory |
19 | holes) | 19 | holes). |
20 | 20 | ||
21 | vmalloc space is lazily synchronized into the different PML4 pages of | 21 | vmalloc space is lazily synchronized into the different PML4 pages of |
22 | the processes using the page fault handler, with init_level4_pgt as | 22 | the processes using the page fault handler, with init_level4_pgt as |
23 | reference. | 23 | reference. |
24 | 24 | ||
25 | Current X86-64 implementations only support 40 bit of address space, | 25 | Current X86-64 implementations only support 40 bits of address space, |
26 | but we support upto 46bits. This expands into MBZ space in the page tables. | 26 | but we support up to 46 bits. This expands into MBZ space in the page tables. |
27 | 27 | ||
28 | -Andi Kleen, Jul 2004 | 28 | -Andi Kleen, Jul 2004 |