diff options
author | H. Peter Anvin <hpa@linux.intel.com> | 2012-05-08 14:22:35 -0400 |
---|---|---|
committer | H. Peter Anvin <hpa@linux.intel.com> | 2012-05-08 14:48:03 -0400 |
commit | 056a43a6d3ab903a798d8ee4435ad67d6fccc3e6 (patch) | |
tree | e7af15979dd52981873a676351ed45307bfe4a6e | |
parent | f7436a9da902922a48cccc208099763b87d6171f (diff) |
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
-rw-r--r-- | arch/x86/realmode/rm/trampoline_64.S | 15 |
1 files changed, 2 insertions, 13 deletions
diff --git a/arch/x86/realmode/rm/trampoline_64.S b/arch/x86/realmode/rm/trampoline_64.S index 66c58cf15503..77b72b45d705 100644 --- a/arch/x86/realmode/rm/trampoline_64.S +++ b/arch/x86/realmode/rm/trampoline_64.S | |||
@@ -73,7 +73,7 @@ ENTRY(trampoline_data) | |||
73 | lmsw %ax # into protected mode | 73 | lmsw %ax # into protected mode |
74 | 74 | ||
75 | # flush prefetch and jump to startup_32 | 75 | # flush prefetch and jump to startup_32 |
76 | ljmpl *(startup_32_vector) | 76 | ljmpl $__KERNEL32_CS, $pa_startup_32 |
77 | 77 | ||
78 | no_longmode: | 78 | no_longmode: |
79 | hlt | 79 | hlt |
@@ -113,7 +113,7 @@ ENTRY(startup_32) | |||
113 | * EFER.LMA = 1). Now we want to jump in 64bit mode, to do that we use | 113 | * EFER.LMA = 1). Now we want to jump in 64bit mode, to do that we use |
114 | * the new gdt/idt that has __KERNEL_CS with CS.L = 1. | 114 | * the new gdt/idt that has __KERNEL_CS with CS.L = 1. |
115 | */ | 115 | */ |
116 | ljmpl *(pa_startup_64_vector) | 116 | ljmpl $__KERNEL_CS, $pa_startup_64 |
117 | 117 | ||
118 | .section ".text64","ax" | 118 | .section ".text64","ax" |
119 | .code64 | 119 | .code64 |
@@ -144,17 +144,6 @@ tgdt: | |||
144 | .quad 0x00cf93000000ffff # __KERNEL_DS | 144 | .quad 0x00cf93000000ffff # __KERNEL_DS |
145 | tgdt_end: | 145 | tgdt_end: |
146 | 146 | ||
147 | .balign 4 | ||
148 | startup_32_vector: | ||
149 | .long pa_startup_32 | ||
150 | .word __KERNEL32_CS, 0 | ||
151 | |||
152 | .balign 4 | ||
153 | .globl startup_64_vector | ||
154 | startup_64_vector: | ||
155 | .long pa_startup_64 | ||
156 | .word __KERNEL_CS, 0 | ||
157 | |||
158 | .data | 147 | .data |
159 | .balign 4 | 148 | .balign 4 |
160 | GLOBAL(trampoline_status) | 149 | GLOBAL(trampoline_status) |