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ARM: no need for nommu to jump through the hoops that mmu does

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nommu can jump directly to __mmap_switched without the absolute
address branching which the mmuful kernel does.

Acked-by: Greg Ungerer <gerg@uclinux.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King 2010-10-01 15:42:02 +01:00
parent 2bfc96a127
commit f131a0800e
1 changed files with 1 additions and 4 deletions
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5
arch/arm/kernel/head-nommu.S
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@ -48,8 +48,6 @@ ENTRY(stext)
movs r8, r5 @ invalid machine (r5=0)? movs r8, r5 @ invalid machine (r5=0)?
beq __error_a @ yes, error 'a' beq __error_a @ yes, error 'a'
ldr r13, __switch_data @ address to jump to after
@ the initialization is done
adr lr, BSYM(__after_proc_init) @ return (PIC) address adr lr, BSYM(__after_proc_init) @ return (PIC) address
ARM( add pc, r10, #PROCINFO_INITFUNC ) ARM( add pc, r10, #PROCINFO_INITFUNC )
THUMB( add r12, r10, #PROCINFO_INITFUNC ) THUMB( add r12, r10, #PROCINFO_INITFUNC )
@ -87,8 +85,7 @@ __after_proc_init:
mcr p15, 0, r0, c1, c0, 0 @ write control reg mcr p15, 0, r0, c1, c0, 0 @ write control reg
#endif /* CONFIG_CPU_CP15 */ #endif /* CONFIG_CPU_CP15 */
mov r3, r13 b __mmap_switched @ clear the BSS and jump
mov pc, r3 @ clear the BSS and jump
@ to start_kernel @ to start_kernel
ENDPROC(__after_proc_init) ENDPROC(__after_proc_init)
.ltorg .ltorg