diff options
| author | Jimi Xenidis | 2011-09-29 12:55:12 +0200 |
|---|---|---|
| committer | Benjamin Herrenschmidt | 2011-11-25 04:11:27 +0100 |
| commit | 9d670280908013004f173b2b86414d9b6918511b (patch) | |
| tree | bd7a7483ae7455cb481c72df907a3b4362e121c2 /arch/powerpc/mm/icswx.h | |
| parent | perf/powerpc: Fix build for PowerPC with uclibc toolchains (diff) | |
| download | kernel-qcow2-linux-9d670280908013004f173b2b86414d9b6918511b.tar.gz kernel-qcow2-linux-9d670280908013004f173b2b86414d9b6918511b.tar.xz kernel-qcow2-linux-9d670280908013004f173b2b86414d9b6918511b.zip | |
powerpc: Split ICSWX ACOP and PID processing
Some processors, like embedded, that already have a PID register that
is managed by the system. This patch separates the ACOP and PID
processing into separate files so that the ACOP code can be shared.
Signed-off-by: Jimi Xenidis <jimix@pobox.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/mm/icswx.h')
| -rw-r--r-- | arch/powerpc/mm/icswx.h | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/arch/powerpc/mm/icswx.h b/arch/powerpc/mm/icswx.h new file mode 100644 index 000000000000..07514e49498e --- /dev/null +++ b/arch/powerpc/mm/icswx.h @@ -0,0 +1,39 @@ +#ifndef _ARCH_POWERPC_MM_ICSWX_H_ +#define _ARCH_POWERPC_MM_ICSWX_H_ + +/* + * ICSWX and ACOP Management + * + * Copyright (C) 2011 Anton Blanchard, IBM Corp. <anton@samba.org> + * + * 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. + * + */ + +#include <asm/mmu_context.h> + +/* also used to denote that PIDs are not used */ +#define COP_PID_NONE 0 + +static inline void sync_cop(void *arg) +{ + struct mm_struct *mm = arg; + + if (mm == current->active_mm) + switch_cop(current->active_mm); +} + +#ifdef CONFIG_PPC_ICSWX_PID +extern int get_cop_pid(struct mm_struct *mm); +extern int disable_cop_pid(struct mm_struct *mm); +extern void free_cop_pid(int free_pid); +#else +#define get_cop_pid(m) (COP_PID_NONE) +#define disable_cop_pid(m) (COP_PID_NONE) +#define free_cop_pid(p) +#endif + +#endif /* !_ARCH_POWERPC_MM_ICSWX_H_ */ |