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author | 2015-08-04 12:17:53 -0700 | |
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committer | 2015-08-04 15:44:42 -0700 | |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/arch/m68k/include/asm/mcfmmu.h | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/arch/m68k/include/asm/mcfmmu.h')
-rw-r--r-- | kernel/arch/m68k/include/asm/mcfmmu.h | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/kernel/arch/m68k/include/asm/mcfmmu.h b/kernel/arch/m68k/include/asm/mcfmmu.h new file mode 100644 index 000000000..26cc3d5a6 --- /dev/null +++ b/kernel/arch/m68k/include/asm/mcfmmu.h @@ -0,0 +1,112 @@ +/* + * mcfmmu.h -- definitions for the ColdFire v4e MMU + * + * (C) Copyright 2011, Greg Ungerer <gerg@uclinux.org> + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file COPYING in the main directory of this archive + * for more details. + */ + +#ifndef MCFMMU_H +#define MCFMMU_H + +/* + * The MMU support registers are mapped into the address space using + * the processor MMUBASE register. We used a fixed address for mapping, + * there doesn't seem any need to make this configurable yet. + */ +#define MMUBASE 0xfe000000 + +/* + * The support registers of the MMU. Names are the sames as those + * used in the Freescale v4e documentation. + */ +#define MMUCR (MMUBASE + 0x00) /* Control register */ +#define MMUOR (MMUBASE + 0x04) /* Operation register */ +#define MMUSR (MMUBASE + 0x08) /* Status register */ +#define MMUAR (MMUBASE + 0x10) /* TLB Address register */ +#define MMUTR (MMUBASE + 0x14) /* TLB Tag register */ +#define MMUDR (MMUBASE + 0x18) /* TLB Data register */ + +/* + * MMU Control register bit flags + */ +#define MMUCR_EN 0x00000001 /* Virtual mode enable */ +#define MMUCR_ASM 0x00000002 /* Address space mode */ + +/* + * MMU Operation register. + */ +#define MMUOR_UAA 0x00000001 /* Update allocatiom address */ +#define MMUOR_ACC 0x00000002 /* TLB access */ +#define MMUOR_RD 0x00000004 /* TLB access read */ +#define MMUOR_WR 0x00000000 /* TLB access write */ +#define MMUOR_ADR 0x00000008 /* TLB address select */ +#define MMUOR_ITLB 0x00000010 /* ITLB operation */ +#define MMUOR_CAS 0x00000020 /* Clear non-locked ASID TLBs */ +#define MMUOR_CNL 0x00000040 /* Clear non-locked TLBs */ +#define MMUOR_CA 0x00000080 /* Clear all TLBs */ +#define MMUOR_STLB 0x00000100 /* Search TLBs */ +#define MMUOR_AAN 16 /* TLB allocation address */ +#define MMUOR_AAMASK 0xffff0000 /* AA mask */ + +/* + * MMU Status register. + */ +#define MMUSR_HIT 0x00000002 /* Search TLB hit */ +#define MMUSR_WF 0x00000008 /* Write access fault */ +#define MMUSR_RF 0x00000010 /* Read access fault */ +#define MMUSR_SPF 0x00000020 /* Supervisor protect fault */ + +/* + * MMU Read/Write Tag register. + */ +#define MMUTR_V 0x00000001 /* Valid */ +#define MMUTR_SG 0x00000002 /* Shared global */ +#define MMUTR_IDN 2 /* Address Space ID */ +#define MMUTR_IDMASK 0x000003fc /* ASID mask */ +#define MMUTR_VAN 10 /* Virtual Address */ +#define MMUTR_VAMASK 0xfffffc00 /* VA mask */ + +/* + * MMU Read/Write Data register. + */ +#define MMUDR_LK 0x00000002 /* Lock entry */ +#define MMUDR_X 0x00000004 /* Execute access enable */ +#define MMUDR_W 0x00000008 /* Write access enable */ +#define MMUDR_R 0x00000010 /* Read access enable */ +#define MMUDR_SP 0x00000020 /* Supervisor access enable */ +#define MMUDR_CM_CWT 0x00000000 /* Cachable write thru */ +#define MMUDR_CM_CCB 0x00000040 /* Cachable copy back */ +#define MMUDR_CM_NCP 0x00000080 /* Non-cachable precise */ +#define MMUDR_CM_NCI 0x000000c0 /* Non-cachable imprecise */ +#define MMUDR_SZ_1MB 0x00000000 /* 1MB page size */ +#define MMUDR_SZ_4KB 0x00000100 /* 4kB page size */ +#define MMUDR_SZ_8KB 0x00000200 /* 8kB page size */ +#define MMUDR_SZ_1KB 0x00000300 /* 1kB page size */ +#define MMUDR_PAN 10 /* Physical address */ +#define MMUDR_PAMASK 0xfffffc00 /* PA mask */ + +#ifndef __ASSEMBLY__ + +/* + * Simple access functions for the MMU registers. Nothing fancy + * currently required, just simple 32bit access. + */ +static inline u32 mmu_read(u32 a) +{ + return *((volatile u32 *) a); +} + +static inline void mmu_write(u32 a, u32 v) +{ + *((volatile u32 *) a) = v; + __asm__ __volatile__ ("nop"); +} + +int cf_tlb_miss(struct pt_regs *regs, int write, int dtlb, int extension_word); + +#endif + +#endif /* MCFMMU_H */ |