| #ifndef _ASM_CRIS_ARCH_PROCESSOR_H | |
| #define _ASM_CRIS_ARCH_PROCESSOR_H | |
| /* Return current instruction pointer. */ | |
| #define current_text_addr() \ | |
| ({void *pc; __asm__ __volatile__ ("lapcq .,%0" : "=rm" (pc)); pc;}) | |
| /* | |
| * Since CRIS doesn't do hardware task-switching this hasn't really anything to | |
| * do with the proccessor itself, it's just here for legacy reasons. This is | |
| * used when task-switching using _resume defined in entry.S. The offsets here | |
| * are hardcoded into _resume, so if this struct is changed, entry.S needs to be | |
| * changed as well. | |
| */ | |
| struct thread_struct { | |
| unsigned long ksp; /* Kernel stack pointer. */ | |
| unsigned long usp; /* User stack pointer. */ | |
| unsigned long ccs; /* Saved flags register. */ | |
| }; | |
| /* | |
| * User-space process size. This is hardcoded into a few places, so don't | |
| * changed it unless everything's clear! | |
| */ | |
| #ifndef CONFIG_ETRAXFS_SIM | |
| #define TASK_SIZE (0xB0000000UL) | |
| #else | |
| #define TASK_SIZE (0xA0000000UL) | |
| #endif | |
| /* CCS I=1, enable interrupts. */ | |
| #define INIT_THREAD { 0, 0, (1 << I_CCS_BITNR) } | |
| #define KSTK_EIP(tsk) \ | |
| ({ \ | |
| unsigned long eip = 0; \ | |
| unsigned long regs = (unsigned long)task_pt_regs(tsk); \ | |
| if (regs > PAGE_SIZE && virt_addr_valid(regs)) \ | |
| eip = ((struct pt_regs *)regs)->erp; \ | |
| eip; \ | |
| }) | |
| /* | |
| * Give the thread a program location, set user-mode and switch user | |
| * stackpointer. | |
| */ | |
| #define start_thread(regs, ip, usp) \ | |
| do { \ | |
| set_fs(USER_DS); \ | |
| regs->erp = ip; \ | |
| regs->ccs |= 1 << (U_CCS_BITNR + CCS_SHIFT); \ | |
| wrusp(usp); \ | |
| } while(0) | |
| /* Nothing special to do for v32 when handling a kernel bus fault fixup. */ | |
| #define arch_fixup(regs) {}; | |
| #endif /* _ASM_CRIS_ARCH_PROCESSOR_H */ |