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/* 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 */

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Name Type Size Permission Actions
hwregs Folder 0755
bitops.h File 1.29 KB 0644
bug.h File 1008 B 0644
cache.h File 601 B 0644
checksum.h File 807 B 0644
cryptocop.h File 4.25 KB 0644
delay.h File 649 B 0644
dma.h File 22 B 0644
intmem.h File 339 B 0644
irq.h File 3.55 KB 0644
irqflags.h File 1 KB 0644
memmap.h File 25 B 0644
mmu.h File 4.07 KB 0644
offset.h File 1.29 KB 0644
page.h File 660 B 0644
pgtable.h File 483 B 0644
processor.h File 1.52 KB 0644
swab.h File 517 B 0644
system.h File 803 B 0644
thread_info.h File 363 B 0644
timex.h File 852 B 0644
tlb.h File 453 B 0644
uaccess.h File 18.38 KB 0644
unistd.h File 4.58 KB 0644