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arch\arm\kernel\head.S
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ENTRY(stext)
 ARM( msr cpsr_c, #PSR_F_BIT | PSR_I_BIT | SVC_MODE ) @ ensure svc mode
 THUMB( mov r9, #PSR_F_BIT | PSR_I_BIT | SVC_MODE )
 THUMB( msr cpsr_c, r9 ) @ ensure svc mode
@ and irqs disabled
mrc p15, 0, r9, c0, c0 @ get processor id
bl __lookup_processor_type @ r5=procinfo r9=cpuid
movs r10, r5 @ invalid processor (r5=0)?
beq __error_p @ yes, error 'p'
bl __lookup_machine_type @ r5=machinfo
movs r8, r5 @ invalid machine (r5=0)?
beq __error_a @ yes, error 'a'
bl __vet_atags
bl __create_page_tables
/*
* The following calls CPU specific code in a position independent
* manner.  See arch/arm/mm/proc-*.S for details.  r10 = base of
* xxx_proc_info structure selected by __lookup_machine_type
* above.  On return, the CPU will be ready for the MMU to be
* turned on, and r0 will hold the CPU control register value.
*/
ldr r13, __switch_data @ address to jump to after
@ mmu has been enabled
badr lr, __enable_mmu @ return (PIC) address
 ARM( add pc, r10, #PROCINFO_INITFUNC )
 THUMB( add r12, r10, #PROCINFO_INITFUNC )
 THUMB( mov pc, r12 )
ENDPROC(stext)
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