| 123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960 |
- #ifndef _ASM_CRIS_ARCH_PROCESSOR_H
- #define _ASM_CRIS_ARCH_PROCESSOR_H
- #include <linux/config.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)user_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 */
|
