[linux-2.6-block.git] / arch / cris / include / arch-v32 / arch / processor.h

/* SPDX-License-Identifier: GPL-2.0 */
#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)

#define INIT_THREAD { }

#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 */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
51533b61 MS	2	#ifndef _ASM_CRIS_ARCH_PROCESSOR_H
	3	#define _ASM_CRIS_ARCH_PROCESSOR_H
	4
51533b61 MS	5
	6	/* Return current instruction pointer. */
	7	#define current_text_addr() \
	8	({void *pc; __asm__ __volatile__ ("lapcq .,%0" : "=rm" (pc)); pc;})
	9
	10	/*
	11	* Since CRIS doesn't do hardware task-switching this hasn't really anything to
	12	* do with the proccessor itself, it's just here for legacy reasons. This is
	13	* used when task-switching using _resume defined in entry.S. The offsets here
	14	* are hardcoded into _resume, so if this struct is changed, entry.S needs to be
	15	* changed as well.
	16	*/
	17	struct thread_struct {
	18	unsigned long ksp; /* Kernel stack pointer. */
	19	unsigned long usp; /* User stack pointer. */
	20	unsigned long ccs; /* Saved flags register. */
	21	};
	22
	23	/*
	24	* User-space process size. This is hardcoded into a few places, so don't
d75d806c	25	* change it unless everything's clear!
51533b61	26	*/
51533b61	27	#define TASK_SIZE (0xB0000000UL)
51533b61	28
06aca924	29	#define INIT_THREAD { }
51533b61 MS	30
	31	#define KSTK_EIP(tsk) \
	32	({ \
	33	unsigned long eip = 0; \
cfa0f29b	34	unsigned long regs = (unsigned long)task_pt_regs(tsk); \
51533b61 MS	35	if (regs > PAGE_SIZE && virt_addr_valid(regs)) \
	36	eip = ((struct pt_regs *)regs)->erp; \
	37	eip; \
	38	})
	39
	40	/*
	41	* Give the thread a program location, set user-mode and switch user
	42	* stackpointer.
	43	*/
	44	#define start_thread(regs, ip, usp) \
	45	do { \
51533b61 MS	46	regs->erp = ip; \
	47	regs->ccs \|= 1 << (U_CCS_BITNR + CCS_SHIFT); \
	48	wrusp(usp); \
	49	} while(0)
	50
	51	/* Nothing special to do for v32 when handling a kernel bus fault fixup. */
	52	#define arch_fixup(regs) {};
	53
	54	#endif /* _ASM_CRIS_ARCH_PROCESSOR_H */