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Linux/arch/arm64/kernel/cpu-reset.S

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Diff markup

Differences between /arch/arm64/kernel/cpu-reset.S (Version linux-6.12-rc7) and /arch/i386/kernel/cpu-reset.S (Version linux-6.2.16)


  1 /* SPDX-License-Identifier: GPL-2.0-only */       
  2 /*                                                
  3  * CPU reset routines                             
  4  *                                                
  5  * Copyright (C) 2001 Deep Blue Solutions Ltd.    
  6  * Copyright (C) 2012 ARM Ltd.                    
  7  * Copyright (C) 2015 Huawei Futurewei Technol    
  8  */                                               
  9                                                   
 10 #include <linux/linkage.h>                        
 11 #include <linux/cfi_types.h>                      
 12 #include <asm/assembler.h>                        
 13 #include <asm/sysreg.h>                           
 14 #include <asm/virt.h>                             
 15                                                   
 16 .text                                             
 17 .pushsection    .idmap.text, "a"                  
 18                                                   
 19 /*                                                
 20  * cpu_soft_restart(el2_switch, entry, arg0, a    
 21  *                                                
 22  * @el2_switch: Flag to indicate a switch to E    
 23  * @entry: Location to jump to for soft reset.    
 24  * arg0: First argument passed to @entry. (rel    
 25  * arg1: Second argument passed to @entry.(phy    
 26  * arg2: Third argument passed to @entry. (phy    
 27  *                                                
 28  * Put the CPU into the same state as it would    
 29  * branch to what would be the reset vector. I    
 30  * flat identity mapping.                         
 31  */                                               
 32 SYM_TYPED_FUNC_START(cpu_soft_restart)            
 33         mov_q   x12, INIT_SCTLR_EL1_MMU_OFF       
 34         pre_disable_mmu_workaround                
 35         /*                                        
 36          * either disable EL1&0 translation re    
 37          * regime if HCR_EL2.E2H == 1             
 38          */                                       
 39         msr     sctlr_el1, x12                    
 40         isb                                       
 41                                                   
 42         cbz     x0, 1f                            
 43         mov     x0, #HVC_SOFT_RESTART             
 44         hvc     #0                                
 45                                                   
 46 1:      mov     x8, x1                            
 47         mov     x0, x2                            
 48         mov     x1, x3                            
 49         mov     x2, x4                            
 50         br      x8                                
 51 SYM_FUNC_END(cpu_soft_restart)                    
 52                                                   
 53 .popsection                                       
                                                      

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