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Diffstat (limited to 'arch/blackfin/include/asm/system.h')
| -rw-r--r-- | arch/blackfin/include/asm/system.h | 177 |
1 files changed, 0 insertions, 177 deletions
diff --git a/arch/blackfin/include/asm/system.h b/arch/blackfin/include/asm/system.h deleted file mode 100644 index f11dd4ebf1..0000000000 --- a/arch/blackfin/include/asm/system.h +++ /dev/null @@ -1,177 +0,0 @@ -/* - * barebox - system.h - * - * Copyright (c) 2005 blackfin.uclinux.org - * - * See file CREDITS for list of people who contributed to this - * project. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation; either version 2 of - * the License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - */ - -#ifndef _BLACKFIN_SYSTEM_H -#define _BLACKFIN_SYSTEM_H - -#include <linux/linkage.h> -#include <asm/blackfin.h> -#include <asm/segment.h> -#include <asm/entry.h> - -#define prepare_to_switch() do { } while(0) - -/* - * switch_to(n) should switch tasks to task ptr, first checking that - * ptr isn't the current task, in which case it does nothing. This - * also clears the TS-flag if the task we switched to has used the - * math co-processor latest. - * - * 05/25/01 - Tony Kou (tonyko@lineo.ca) - * - * Adapted for BlackFin (ADI) by Ted Ma, Metrowerks, and Motorola GSG - * Copyright (c) 2002 Arcturus Networks Inc. (www.arcturusnetworks.com) - * Copyright (c) 2003 Metrowerks (www.metrowerks.com) - */ - -asmlinkage void resume(void); - -#define switch_to(prev,next,last) { \ - void *_last; \ - __asm__ __volatile__( \ - "r0 = %1;\n\t" \ - "r1 = %2;\n\t" \ - "call resume;\n\t" \ - "%0 = r0;\n\t" \ - : "=d" (_last) \ - : "d" (prev), \ - "d" (next) \ - : "CC", "R0", "R1", "R2", "R3", "R4", "R5", "P0", "P1");\ - (last) = _last; \ -} - -/* Force kerenl switch to user mode -- Steven Chen */ -#define switch_to_user_mode() { \ - __asm__ __volatile__( \ - "call kernel_to_user_mode;\n\t" \ - :: \ - : "CC", "R0", "R1", "R2", "R3", "R4", "R5", "P0", "P1");\ -} - -/* - * Interrupt configuring macros. - */ - -extern int irq_flags; - -#define __sti() { \ - __asm__ __volatile__ ( \ - "r3 = %0;" \ - "sti r3;" \ - ::"m"(irq_flags):"R3"); \ -} - -#define __cli() { \ - __asm__ __volatile__ ( \ - "cli r3;" \ - :::"R3"); \ -} - -#define __save_flags(x) { \ - __asm__ __volatile__ ( \ - "cli r3;" \ - "%0 = r3;" \ - "sti r3;" \ - ::"m"(x):"R3"); \ -} - -#define __save_and_cli(x) { \ - __asm__ __volatile__ ( \ - "cli r3;" \ - "%0 = r3;" \ - ::"m"(x):"R3"); \ -} - -#define __restore_flags(x) { \ - __asm__ __volatile__ ( \ - "r3 = %0;" \ - "sti r3;" \ - ::"m"(x):"R3"); \ -} - -/* For spinlocks etc */ -#define local_irq_save(x) __save_and_cli(x) -#define local_irq_restore(x) __restore_flags(x) -#define local_irq_disable() __cli() -#define local_irq_enable() __sti() - -#define cli() __cli() -#define sti() __sti() -#define save_flags(x) __save_flags(x) -#define restore_flags(x) __restore_flags(x) -#define save_and_cli(x) __save_and_cli(x) - -/* - * Force strict CPU ordering. - */ -#define nop() asm volatile ("nop;\n\t"::) -#define mb() asm volatile ("" : : :"memory") -#define rmb() asm volatile ("" : : :"memory") -#define wmb() asm volatile ("" : : :"memory") -#define set_rmb(var, value) do { xchg(&var, value); } while (0) -#define set_mb(var, value) set_rmb(var, value) -#define set_wmb(var, value) do { var = value; wmb(); } while (0) - -#ifdef CONFIG_SMP -#define smp_mb() mb() -#define smp_rmb() rmb() -#define smp_wmb() wmb() -#else -#define smp_mb() barrier() -#define smp_rmb() barrier() -#define smp_wmb() barrier() -#endif - -#define xchg(ptr,x) ((__typeof__(*(ptr)))__xchg((unsigned long)(x),(ptr),sizeof(*(ptr)))) -#define tas(ptr) (xchg((ptr),1)) - -struct __xchg_dummy { - unsigned long a[100]; -}; -#define __xg(x) ((volatile struct __xchg_dummy *)(x)) - -static inline unsigned long __xchg(unsigned long x, volatile void *ptr, - int size) -{ - unsigned long tmp; - unsigned long flags = 0; - - save_and_cli(flags); - - switch (size) { - case 1: - __asm__ __volatile__("%0 = %2;\n\t" "%2 = %1;\n\t": "=&d"(tmp): "d"(x), "m"(*__xg(ptr)):"memory"); - break; - case 2: - __asm__ __volatile__("%0 = %2;\n\t" "%2 = %1;\n\t": "=&d"(tmp): "d"(x), "m"(*__xg(ptr)):"memory"); - break; - case 4: - __asm__ __volatile__("%0 = %2;\n\t" "%2 = %1;\n\t": "=&d"(tmp): "d"(x), "m"(*__xg(ptr)):"memory"); - break; - } - restore_flags(flags); - return tmp; -} - -/* Depend on whether Blackfin has hard reset function */ -/* YES it does, but it is tricky to implement - FIXME later ...MaTed--- */ -#define HARD_RESET_NOW() ({}) - -#endif /* _BLACKFIN_SYSTEM_H */ |