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author | Linus Torvalds <torvalds@linux-foundation.org> | 2012-05-29 20:14:53 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-05-29 20:14:53 -0700 |
commit | 731a7378b81c2f5fa88ca1ae20b83d548d5613dc (patch) | |
tree | fce6b4b5373466ddd87944ffd1021f444ce1dff5 /arch/x86/realmode/rm/header.S | |
parent | 87a5af24e54857e7b15c1f1b0468512ee65c94e3 (diff) | |
parent | 61f5446169046c217a5479517edac3a890c3bee7 (diff) | |
download | linux-731a7378b81c2f5fa88ca1ae20b83d548d5613dc.tar.gz linux-731a7378b81c2f5fa88ca1ae20b83d548d5613dc.tar.xz linux-731a7378b81c2f5fa88ca1ae20b83d548d5613dc.zip |
Merge branch 'x86-trampoline-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 trampoline rework from H. Peter Anvin:
"This code reworks all the "trampoline"/"realmode" code (various bits
that need to live in the first megabyte of memory, most but not all of
which runs in real mode at some point) in the kernel into a single
object. The main reason for doing this is that it eliminates the last
place in the kernel where we needed pages to be mapped RWX. This code
separates all that code into proper R/RW/RX pages."
Fix up conflicts in arch/x86/kernel/Makefile (mca removed next to reboot
code), and arch/x86/kernel/reboot.c (reboot code moved around in one
branch, modified in this one), and arch/x86/tools/relocs.c (mostly same
code came in earlier due to working around the ld bugs just before the
3.4 release).
Also remove stale x86-relocs entry from scripts/.gitignore as per Peter
Anvin.
* commit '61f5446169046c217a5479517edac3a890c3bee7': (36 commits)
x86, realmode: Move end signature into header.S
x86, relocs: When printing an error, say relative or absolute
x86, relocs: More relocations which may end up as absolute
x86, relocs: Workaround for binutils 2.22.52.0.1 section bug
xen-acpi-processor: Add missing #include <xen/xen.h>
acpi, bgrd: Add missing <linux/io.h> to drivers/acpi/bgrt.c
x86, realmode: Change EFER to a single u64 field
x86, realmode: Move kernel/realmode.c to realmode/init.c
x86, realmode: Move not-common bits out of trampoline_common.S
x86, realmode: Mask out EFER.LMA when saving trampoline EFER
x86, realmode: Fix no cache bits test in reboot_32.S
x86, realmode: Make sure all generated files are listed in targets
x86, realmode: build fix: remove duplicate build
x86, realmode: read cr4 and EFER from kernel for 64-bit trampoline
x86, realmode: fixes compilation issue in tboot.c
x86, realmode: move relocs from scripts/ to arch/x86/tools
x86, realmode: header for trampoline code
x86, realmode: flattened rm hierachy
x86, realmode: don't copy real_mode_header
x86, realmode: fix 64-bit wakeup sequence
...
Diffstat (limited to 'arch/x86/realmode/rm/header.S')
-rw-r--r-- | arch/x86/realmode/rm/header.S | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/arch/x86/realmode/rm/header.S b/arch/x86/realmode/rm/header.S new file mode 100644 index 000000000000..fadf48378ada --- /dev/null +++ b/arch/x86/realmode/rm/header.S @@ -0,0 +1,41 @@ +/* + * Real-mode blob header; this should match realmode.h and be + * readonly; for mutable data instead add pointers into the .data + * or .bss sections as appropriate. + */ + +#include <linux/linkage.h> +#include <asm/page_types.h> + +#include "realmode.h" + + .section ".header", "a" + + .balign 16 +GLOBAL(real_mode_header) + .long pa_text_start + .long pa_ro_end + /* SMP trampoline */ + .long pa_trampoline_start + .long pa_trampoline_status + .long pa_trampoline_header +#ifdef CONFIG_X86_64 + .long pa_trampoline_pgd; +#endif + /* ACPI S3 wakeup */ +#ifdef CONFIG_ACPI_SLEEP + .long pa_wakeup_start + .long pa_wakeup_header +#endif + /* APM/BIOS reboot */ +#ifdef CONFIG_X86_32 + .long pa_machine_real_restart_asm +#endif +END(real_mode_header) + + /* End signature, used to verify integrity */ + .section ".signature","a" + .balign 4 +GLOBAL(end_signature) + .long REALMODE_END_SIGNATURE +END(end_signature) |