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Linux/arch/arm/kernel/fiqasm.S

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Diff markup

Differences between /arch/arm/kernel/fiqasm.S (Architecture m68k) and /arch/mips/kernel/fiqasm.S (Architecture mips)


  1 /*                                                
  2  *  linux/arch/arm/kernel/fiqasm.S                
  3  *                                                
  4  *  Derived from code originally in linux/arch    
  5  *                                                
  6  *  Copyright (C) 1998 Russell King               
  7  *  Copyright (C) 1998, 1999 Phil Blundell        
  8  *  Copyright (C) 2011, Linaro Limited            
  9  *                                                
 10  *  FIQ support written by Philip Blundell <phi    
 11  *                                                
 12  *  FIQ support re-written by Russell King to     
 13  *                                                
 14  *  v7/Thumb-2 compatibility modifications by     
 15  */                                               
 16                                                   
 17 #include <linux/linkage.h>                        
 18 #include <asm/assembler.h>                        
 19                                                   
 20 /*                                                
 21  * Taking an interrupt in FIQ mode is death, s    
 22  * disable irqs for the duration.                 
 23  */                                               
 24                                                   
 25 ENTRY(__set_fiq_regs)                             
 26         mov     r2, #PSR_I_BIT | PSR_F_BIT | F    
 27         mrs     r1, cpsr                          
 28         msr     cpsr_c, r2      @ select FIQ m    
 29         mov     r0, r0          @ avoid hazard    
 30         ldmia   r0!, {r8 - r12}                   
 31         ldr     sp, [r0], #4                      
 32         ldr     lr, [r0]                          
 33         msr     cpsr_c, r1      @ return to SV    
 34         mov     r0, r0          @ avoid hazard    
 35         ret     lr                                
 36 ENDPROC(__set_fiq_regs)                           
 37                                                   
 38 ENTRY(__get_fiq_regs)                             
 39         mov     r2, #PSR_I_BIT | PSR_F_BIT | F    
 40         mrs     r1, cpsr                          
 41         msr     cpsr_c, r2      @ select FIQ m    
 42         mov     r0, r0          @ avoid hazard    
 43         stmia   r0!, {r8 - r12}                   
 44         str     sp, [r0], #4                      
 45         str     lr, [r0]                          
 46         msr     cpsr_c, r1      @ return to SV    
 47         mov     r0, r0          @ avoid hazard    
 48         ret     lr                                
 49 ENDPROC(__get_fiq_regs)                           
                                                      

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