mmu.h

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/*
 * Copyright (C) 2005 Jakub Jermar
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef __sparc64_MMU_H__
#define __sparc64_MMU_H__

#include <arch/asm.h>
#include <arch/barrier.h>
#include <arch/types.h>
#include <typedefs.h>

#define ASI_LSU_CONTROL_REG             0x45    
#define ASI_IMMU                        0x50
#define ASI_IMMU_TSB_8KB_PTR_REG        0x51    
#define ASI_IMMU_TSB_64KB_PTR_REG       0x52
#define ASI_ITLB_DATA_IN_REG            0x54
#define ASI_ITLB_DATA_ACCESS_REG        0x55
#define ASI_ITLB_TAG_READ_REG           0x56
#define ASI_IMMU_DEMAP                  0x57

#define VA_IMMU_TAG_TARGET              0x0     
#define VA_IMMU_SFSR                    0x18    
#define VA_IMMU_TSB_BASE                0x28    
#define VA_IMMU_TAG_ACCESS              0x30    
#define ASI_DMMU                        0x58
#define ASI_DMMU_TSB_8KB_PTR_REG        0x59    
#define ASI_DMMU_TSB_64KB_PTR_REG       0x5a
#define ASI_DMMU_TSB_DIRECT_PTR_REG     0x5b
#define ASI_DTLB_DATA_IN_REG            0x5c
#define ASI_DTLB_DATA_ACCESS_REG        0x5d
#define ASI_DTLB_TAG_READ_REG           0x5e
#define ASI_DMMU_DEMAP                  0x5f

#define VA_DMMU_TAG_TARGET              0x0     
#define VA_PRIMARY_CONTEXT_REG          0x8     
#define VA_SECONDARY_CONTEXT_REG        0x10    
#define VA_DMMU_SFSR                    0x18    
#define VA_DMMU_SFAR                    0x20    
#define VA_DMMU_TSB_BASE                0x28    
#define VA_DMMU_TAG_ACCESS              0x30    
#define VA_DMMU_VA_WATCHPOINT_REG       0x38    
#define VA_DMMU_PA_WATCHPOINT_REG       0x40    
union lsu_cr_reg {
        __u64 value;
        struct {
                unsigned : 23;
                unsigned pm : 8;
                unsigned vm : 8;
                unsigned pr : 1;
                unsigned pw : 1;
                unsigned vr : 1;
                unsigned vw : 1;
                unsigned : 1;
                unsigned fm : 16;       
                unsigned dm : 1;        
                unsigned im : 1;        
                unsigned dc : 1;        
                unsigned ic : 1;        
        } __attribute__ ((packed));
};
typedef union lsu_cr_reg lsu_cr_reg_t;


#define immu_enable()   immu_set(true)
#define immu_disable()  immu_set(false)
#define dmmu_enable()   dmmu_set(true)
#define dmmu_disable()  dmmu_set(false)

static inline void immu_set(bool enable)
{
        lsu_cr_reg_t cr;
        
        cr.value = asi_u64_read(ASI_LSU_CONTROL_REG, 0);
        cr.im = enable;
        asi_u64_write(ASI_LSU_CONTROL_REG, 0, cr.value);
        membar();
}

static inline void dmmu_set(bool enable)
{
        lsu_cr_reg_t cr;
        
        cr.value = asi_u64_read(ASI_LSU_CONTROL_REG, 0);
        cr.dm = enable;
        asi_u64_write(ASI_LSU_CONTROL_REG, 0, cr.value);
        membar();
}

#endif

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