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| author | Jarkko Sakkinen <jarkko.sakkinen@intel.com> | 2012-05-08 21:22:43 +0300 |
|---|---|---|
| committer | H. Peter Anvin <hpa@linux.intel.com> | 2012-05-08 11:48:45 -0700 |
| commit | f37240f16bec91f15ce564515f70a6ca9715ce96 (patch) | |
| tree | d1e98241650bfed0d87f60e3e71a8ad716782f6d /arch/x86/realmode/rm/trampoline_common.S | |
| parent | c4845474a01f699966272536e8416222e3f2d2cb (diff) | |
| download | linux-stable-f37240f16bec91f15ce564515f70a6ca9715ce96.tar.gz linux-stable-f37240f16bec91f15ce564515f70a6ca9715ce96.tar.bz2 linux-stable-f37240f16bec91f15ce564515f70a6ca9715ce96.zip | |
x86, realmode: header for trampoline code
Added header for trampoline code that can be used to supply
input data to it. This makes interface between real mode code
and kernel cleaner and simpler. Replaced two confusing pointers
to level4 pgt in trampoline_64.S with a single pointer to the
beginning of the page table.
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@intel.com>
Link: http://lkml.kernel.org/r/1336501366-28617-21-git-send-email-jarkko.sakkinen@intel.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Diffstat (limited to 'arch/x86/realmode/rm/trampoline_common.S')
| -rw-r--r-- | arch/x86/realmode/rm/trampoline_common.S | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/arch/x86/realmode/rm/trampoline_common.S b/arch/x86/realmode/rm/trampoline_common.S new file mode 100644 index 000000000000..c3f951c468c5 --- /dev/null +++ b/arch/x86/realmode/rm/trampoline_common.S @@ -0,0 +1,23 @@ + .section ".rodata","a" + + .balign 4 +tr_idt: .fill 1, 6, 0 + + .bss + + .balign 4 +GLOBAL(trampoline_status) .space 4 + +GLOBAL(trampoline_header) +#ifdef CONFIG_X86_32 + tr_start: .space 4 + tr_gdt: .space 6 +#else + tr_start: .space 8 +#endif +END(trampoline_header) + +#ifdef CONFIG_X86_64 + .balign PAGE_SIZE +GLOBAL(trampoline_pgd) .space PAGE_SIZE +#endif |