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Linux/arch/arc/include/asm/processor.h

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Diff markup

Differences between /arch/arc/include/asm/processor.h (Version linux-6.3-rc3) and /arch/alpha/include/asm-alpha/processor.h (Version linux-4.15.18)


  1 /* SPDX-License-Identifier: GPL-2.0-only */         1 
  2 /*                                                
  3  * Copyright (C) 2004, 2007-2010, 2011-2012 Sy    
  4  *                                                
  5  * vineetg: March 2009                            
  6  *  -Implemented task_pt_regs( )                  
  7  *                                                
  8  * Amit Bhor, Sameer Dhavale, Ashwin Chaugule:    
  9  */                                               
 10                                                   
 11 #ifndef __ASM_ARC_PROCESSOR_H                     
 12 #define __ASM_ARC_PROCESSOR_H                     
 13                                                   
 14 #ifndef __ASSEMBLY__                              
 15                                                   
 16 #include <asm/ptrace.h>                           
 17 #include <asm/dsp.h>                              
 18 #include <asm/fpu.h>                              
 19                                                   
 20 /* Arch specific stuff which needs to be saved    
 21  * However these items are not so important so    
 22  * struct thread_info                             
 23  */                                               
 24 struct thread_struct {                            
 25         unsigned long ksp;      /* kernel mode    
 26         unsigned long callee_reg;       /* poi    
 27         unsigned long fault_address;    /* dbl    
 28 #ifdef CONFIG_ARC_DSP_SAVE_RESTORE_REGS           
 29         struct dsp_callee_regs dsp;               
 30 #endif                                            
 31 #ifdef CONFIG_ARC_FPU_SAVE_RESTORE                
 32         struct arc_fpu fpu;                       
 33 #endif                                            
 34 };                                                
 35                                                   
 36 #define INIT_THREAD  {                            
 37         .ksp = sizeof(init_stack) + (unsigned     
 38 }                                                 
 39                                                   
 40 /* Forward declaration, a strange C thing */      
 41 struct task_struct;                               
 42                                                   
 43 #define task_pt_regs(p) \                         
 44         ((struct pt_regs *)(THREAD_SIZE + (voi    
 45                                                   
 46 /*                                                
 47  * A lot of busy-wait loops in SMP are based o    
 48  * get optimised away by gcc                      
 49  */                                               
 50 #define cpu_relax()             barrier()         
 51                                                   
 52 #define KSTK_EIP(tsk)   (task_pt_regs(tsk)->re    
 53 #define KSTK_ESP(tsk)   (task_pt_regs(tsk)->sp    
 54                                                   
 55 /*                                                
 56  * Where about of Task's sp, fp, blink when it    
 57  * Look in process.c for details of kernel sta    
 58  */                                               
 59 #define TSK_K_ESP(tsk)          (tsk->thread.k    
 60                                                   
 61 #define TSK_K_REG(tsk, off)     (*((unsigned l    
 62                                         sizeof    
 63                                                   
 64 #define TSK_K_BLINK(tsk)        TSK_K_REG(tsk,    
 65 #define TSK_K_FP(tsk)           TSK_K_REG(tsk,    
 66                                                   
 67 extern void start_thread(struct pt_regs * regs    
 68                          unsigned long usp);      
 69                                                   
 70 extern unsigned int __get_wchan(struct task_st    
 71                                                   
 72 #endif /* !__ASSEMBLY__ */                        
 73                                                   
 74 /*                                                
 75  * Default System Memory Map on ARC               
 76  *                                                
 77  * ---------------------------- (lower 2G, Tra    
 78  * 0x0000_0000          0x5FFF_FFFF     (user     
 79  * 0x6000_0000          0x6FFF_FFFF     (reser    
 80  * 0x7000_0000          0x7FFF_FFFF     (kvadd    
 81  *                                                
 82  * PAGE_OFFSET ---------------- (Upper 2G, Unt    
 83  * 0x8000_0000          0xBFFF_FFFF     (kerne    
 84  * 0xC000_0000          0xFFFF_FFFF     (perip    
 85  * -------------------------------------------    
 86  */                                               
 87                                                   
 88 #define TASK_SIZE       0x60000000                
 89                                                   
 90 #define VMALLOC_START   (PAGE_OFFSET - (CONFIG    
 91                                                   
 92 /* 1 PGDIR_SIZE each for fixmap/pkmap, 2 PGDIR    
 93 #define VMALLOC_SIZE    ((CONFIG_ARC_KVADDR_SI    
 94                                                   
 95 #define VMALLOC_END     (VMALLOC_START + VMALL    
 96                                                   
 97 #define USER_KERNEL_GUTTER    (VMALLOC_START -    
 98                                                   
 99 #define STACK_TOP       TASK_SIZE                 
100 #define STACK_TOP_MAX   STACK_TOP                 
101                                                   
102 /* This decides where the kernel will search f    
103  * space during mmap's.                           
104  */                                               
105 #define TASK_UNMAPPED_BASE      (TASK_SIZE / 3    
106                                                   
107 #endif /* __ASM_ARC_PROCESSOR_H */                
108                                                   

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