#ifndef __ASM_BFIN_PROCESSOR_H #define __ASM_BFIN_PROCESSOR_H /* * Default implementation of macro that returns current * instruction pointer ("program counter"). */ #define current_text_addr() ({ __label__ _l; _l: &&_l;}) #include <asm/blackfin.h> #include <asm/segment.h> #include <linux/compiler.h> static inline unsigned long rdusp(void) { unsigned long usp; __asm__ __volatile__("%0 = usp;\n\t":"=da"(usp)); return usp; } static inline void wrusp(unsigned long usp) { __asm__ __volatile__("usp = %0;\n\t"::"da"(usp)); } /* * User space process size: 1st byte beyond user address space. */ extern unsigned long memory_end; #define TASK_SIZE (memory_end) #ifdef __KERNEL__ #define STACK_TOP TASK_SIZE #endif #define TASK_UNMAPPED_BASE 0 struct thread_struct { unsigned long ksp; /* kernel stack pointer */ unsigned long usp; /* user stack pointer */ unsigned short seqstat; /* saved status register */ unsigned long esp0; /* points to SR of stack frame pt_regs */ unsigned long pc; /* instruction pointer */ void * debuggerinfo; }; #define INIT_THREAD { \ sizeof(init_stack) + (unsigned long) init_stack, 0, \ PS_S, 0, 0 \ } /* * Do necessary setup to start up a newly executed thread. * * pass the data segment into user programs if it exists, * it can't hurt anything as far as I can tell */ #define start_thread(_regs, _pc, _usp) \ do { \ set_fs(USER_DS); \ (_regs)->pc = (_pc); \ if (current->mm) \ (_regs)->p5 = current->mm->start_data; \ task_thread_info(current)->l1_task_info.stack_start \ = (void *)current->mm->context.stack_start; \ task_thread_info(current)->l1_task_info.lowest_sp = (void *)(_usp); \ memcpy(L1_SCRATCH_TASK_INFO, &task_thread_info(current)->l1_task_info, \ sizeof(*L1_SCRATCH_TASK_INFO)); \ wrusp(_usp); \ } while(0) /* Forward declaration, a strange C thing */ struct task_struct; /* Free all resources held by a thread. */ static inline void release_thread(struct task_struct *dead_task) { } #define prepare_to_copy(tsk) do { } while (0) extern int kernel_thread(int (*fn) (void *), void *arg, unsigned long flags); /* * Free current thread data structures etc.. */ static inline void exit_thread(void) { } /* * Return saved PC of a blocked thread. */ #define thread_saved_pc(tsk) (tsk->thread.pc) unsigned long get_wchan(struct task_struct *p); #define KSTK_EIP(tsk) \ ({ \ unsigned long eip = 0; \ if ((tsk)->thread.esp0 > PAGE_SIZE && \ MAP_NR((tsk)->thread.esp0) < max_mapnr) \ eip = ((struct pt_regs *) (tsk)->thread.esp0)->pc; \ eip; }) #define KSTK_ESP(tsk) ((tsk) == current ? rdusp() : (tsk)->thread.usp) #define cpu_relax() barrier() /* Get the Silicon Revision of the chip */ static inline uint32_t __pure bfin_revid(void) { /* stored in the upper 4 bits */ return bfin_read_CHIPID() >> 28; } static inline uint32_t __pure bfin_compiled_revid(void) { #if defined(CONFIG_BF_REV_0_0) return 0; #elif defined(CONFIG_BF_REV_0_1) return 1; #elif defined(CONFIG_BF_REV_0_2) return 2; #elif defined(CONFIG_BF_REV_0_3) return 3; #elif defined(CONFIG_BF_REV_0_4) return 4; #elif defined(CONFIG_BF_REV_0_5) return 5; #elif defined(CONFIG_BF_REV_ANY) return 0xffff; #else return -1; #endif } #endif