1 /* 2 * linux/arch/unicore32/include/asm/processor.h 3 * 4 * Code specific to PKUnity SoC and UniCore ISA 5 * 6 * Copyright (C) 2001-2010 GUAN Xue-tao 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License version 2 as 10 * published by the Free Software Foundation. 11 */ 12 13 #ifndef __UNICORE_PROCESSOR_H__ 14 #define __UNICORE_PROCESSOR_H__ 15 16 /* 17 * Default implementation of macro that returns current 18 * instruction pointer ("program counter"). 19 */ 20 #define current_text_addr() ({ __label__ _l; _l: &&_l; }) 21 22 #ifdef __KERNEL__ 23 24 #include <asm/ptrace.h> 25 #include <asm/types.h> 26 27 #ifdef __KERNEL__ 28 #define STACK_TOP TASK_SIZE 29 #define STACK_TOP_MAX TASK_SIZE 30 #endif 31 32 struct debug_entry { 33 u32 address; 34 u32 insn; 35 }; 36 37 struct debug_info { 38 int nsaved; 39 struct debug_entry bp[2]; 40 }; 41 42 struct thread_struct { 43 /* fault info */ 44 unsigned long address; 45 unsigned long trap_no; 46 unsigned long error_code; 47 /* debugging */ 48 struct debug_info debug; 49 }; 50 51 #define INIT_THREAD { } 52 53 #define start_thread(regs, pc, sp) \ 54 ({ \ 55 unsigned long *stack = (unsigned long *)sp; \ 56 memset(regs->uregs, 0, sizeof(regs->uregs)); \ 57 regs->UCreg_asr = USER_MODE; \ 58 regs->UCreg_pc = pc & ~1; /* pc */ \ 59 regs->UCreg_sp = sp; /* sp */ \ 60 regs->UCreg_02 = stack[2]; /* r2 (envp) */ \ 61 regs->UCreg_01 = stack[1]; /* r1 (argv) */ \ 62 regs->UCreg_00 = stack[0]; /* r0 (argc) */ \ 63 }) 64 65 /* Forward declaration, a strange C thing */ 66 struct task_struct; 67 68 /* Free all resources held by a thread. */ 69 extern void release_thread(struct task_struct *); 70 71 unsigned long get_wchan(struct task_struct *p); 72 73 #define cpu_relax() barrier() 74 #define cpu_relax_lowlatency() cpu_relax() 75 76 #define task_pt_regs(p) \ 77 ((struct pt_regs *)(THREAD_START_SP + task_stack_page(p)) - 1) 78 79 #define KSTK_EIP(tsk) (task_pt_regs(tsk)->UCreg_pc) 80 #define KSTK_ESP(tsk) (task_pt_regs(tsk)->UCreg_sp) 81 82 #endif 83 84 #endif /* __UNICORE_PROCESSOR_H__ */ 85