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#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
* change it unless everything's clear!
*/
#define TASK_SIZE (0xB0000000UL)
/* 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 { \
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 */