Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 99a5b287 authored by Sonic Zhang's avatar Sonic Zhang Committed by Mike Frysinger
Browse files

Blackfin: add new cacheflush syscall 



Flushing caches sometimes requires anomaly workarounds which require
supervisor-only insns.  Normally we don't need to flush caches from
userspace so this isn't a problem, but when gcc generates trampolines
on the stack, we do.

So add a new syscall for gcc to use modeled after the mips version.

Signed-off-by: default avatarSonic Zhang <sonic.zhang@analog.com>
Signed-off-by: default avatarMike Frysinger <vapier@gentoo.org>
parent 73775b89

arch/blackfin/include/asm/Kbuild

+1 −0
Original line number Diff line number Diff line 
include include/asm-generic/Kbuild.asm



header-y += bfin_sport.h

header-y += cachectl.h

header-y += fixed_code.h

arch/blackfin/include/asm/cachectl.h

0 → 100644
+20 −0
Original line number Diff line number Diff line 
/*

 * based on the mips/cachectl.h

 *

 * Copyright 2010 Analog Devices Inc.

 * Copyright (C) 1994, 1995, 1996 by Ralf Baechle

 *

 * Licensed under the GPL-2 or later.

 */



#ifndef	_ASM_CACHECTL

#define	_ASM_CACHECTL



/*

 * Options for cacheflush system call

 */

#define	ICACHE	(1<<0)		/* flush instruction cache        */

#define	DCACHE	(1<<1)		/* writeback and flush data cache */

#define	BCACHE	(ICACHE|DCACHE)	/* flush both caches              */



#endif	/* _ASM_CACHECTL */

arch/blackfin/include/asm/ptrace.h

+3 −0
Original line number Diff line number Diff line
@@ -113,6 +113,9 @@ extern void user_disable_single_step(struct task_struct *child); 
/* common code demands this function */

#define ptrace_disable(child) user_disable_single_step(child)



extern int is_user_addr_valid(struct task_struct *child,

			      unsigned long start, unsigned long len);



/*

 * Get the address of the live pt_regs for the specified task.

 * These are saved onto the top kernel stack when the process

arch/blackfin/include/asm/unistd.h

+2 −1
Original line number Diff line number Diff line
@@ -392,8 +392,9 @@ 
#define __NR_fanotify_init	371

#define __NR_fanotify_mark	372

#define __NR_prlimit64		373

#define __NR_cacheflush		374



#define __NR_syscall		374

#define __NR_syscall		375

#define NR_syscalls		__NR_syscall



/* Old optional stuff no one actually uses */

arch/blackfin/kernel/ptrace.c

+2 −2
Original line number Diff line number Diff line
@@ -114,8 +114,8 @@ put_reg(struct task_struct *task, long regno, unsigned long data) 
/*

 * check that an address falls within the bounds of the target process's memory mappings

 */

static inline int is_user_addr_valid(struct task_struct *child,

				     unsigned long start, unsigned long len)

int

is_user_addr_valid(struct task_struct *child, unsigned long start, unsigned long len)

{

	struct vm_area_struct *vma;

	struct sram_list_struct *sraml;