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x86, realmode: Remove indirect jumps in trampoline_64.S 

Remove indirect jumps in trampoline_64.S which are no longer
necessary: the realmode code can relocate the absolute jumps
correctly from the start.

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Link: http://lkml.kernel.org/r/1336501366-28617-13-git-send-email-jarkko.sakkinen@intel.com
This commit is contained in:
H. Peter Anvin 2012-05-08 21:22:35 +03:00
parent f7436a9da9
commit 056a43a6d3
1 changed files with 2 additions and 13 deletions
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15
arch/x86/realmode/rm/trampoline_64.S
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@ -73,7 +73,7 @@ ENTRY(trampoline_data)
lmsw %ax # into protected mode
# flush prefetch and jump to startup_32
ljmpl *(startup_32_vector)
ljmpl $__KERNEL32_CS, $pa_startup_32
no_longmode:
hlt
@ -113,7 +113,7 @@ ENTRY(startup_32)
* EFER.LMA = 1). Now we want to jump in 64bit mode, to do that we use
* the new gdt/idt that has __KERNEL_CS with CS.L = 1.
*/
ljmpl *(pa_startup_64_vector)
ljmpl $__KERNEL_CS, $pa_startup_64
.section ".text64","ax"
.code64
@ -144,17 +144,6 @@ tgdt:
.quad 0x00cf93000000ffff # __KERNEL_DS
tgdt_end:
.balign 4
startup_32_vector:
.long pa_startup_32
.word __KERNEL32_CS, 0
.balign 4
.globl startup_64_vector
startup_64_vector:
.long pa_startup_64
.word __KERNEL_CS, 0
.data
.balign 4
GLOBAL(trampoline_status)