/*
* 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_TLB_H__
#define __sparc64_TLB_H__
#include <arch/mm/tte.h>
#include <arch/mm/mmu.h>
#include <arch/mm/page.h>
#include <arch/asm.h>
#include <arch/barrier.h>
#include <arch/types.h>
#include <typedefs.h>
#define ITLB_ENTRY_COUNT 64
#define DTLB_ENTRY_COUNT 64
/** Page sizes. */
#define PAGESIZE_8K 0
#define PAGESIZE_64K 1
#define PAGESIZE_512K 2
#define PAGESIZE_4M 3
union tlb_context_reg {
__u64 v;
struct {
unsigned long : 51;
unsigned context : 13; /**< Context/ASID. */
} __attribute__ ((packed));
};
typedef union tlb_context_reg tlb_context_reg_t;
/** I-/D-TLB Data In/Access Register type. */
typedef tte_data_t tlb_data_t;
/** I-/D-TLB Data Access Address in Alternate Space. */
union tlb_data_access_addr {
__u64 value;
struct {
__u64 : 55;
unsigned tlb_entry : 6;
unsigned : 3;
} __attribute__ ((packed));
};
typedef union tlb_data_access_addr tlb_data_access_addr_t;
typedef union tlb_data_access_addr tlb_tag_read_addr_t;
/** I-/D-TLB Tag Read Register. */
union tlb_tag_read_reg {
__u64 value;
struct {
__u64 vpn : 51; /**< Virtual Address bits 63:13. */
unsigned context : 13; /**< Context identifier. */
} __attribute__ ((packed));
};
typedef union tlb_tag_read_reg tlb_tag_read_reg_t;
typedef union tlb_tag_read_reg tlb_tag_access_reg_t;
/** TLB Demap Operation types. */
#define TLB_DEMAP_PAGE 0
#define TLB_DEMAP_CONTEXT 1
/** TLB Demap Operation Context register encodings. */
#define TLB_DEMAP_PRIMARY 0
#define TLB_DEMAP_SECONDARY 1
#define TLB_DEMAP_NUCLEUS 2
/** TLB Demap Operation Address. */
union tlb_demap_addr {
__u64 value;
struct {
__u64 vpn: 51; /**< Virtual Address bits 63:13. */
unsigned : 6; /**< Ignored. */
unsigned type : 1; /**< The type of demap operation. */
unsigned context : 2; /**< Context register selection. */
unsigned : 4; /**< Zero. */
} __attribute__ ((packed));
};
typedef union tlb_demap_addr tlb_demap_addr_t;
/** TLB Synchronous Fault Status Register. */
union tlb_sfsr_reg {
__u64 value;
struct {
unsigned long : 39; /**< Implementation dependent. */
unsigned nf : 1; /**< Nonfaulting load. */
unsigned asi : 8; /**< ASI. */
unsigned tm : 1; /**< TLB miss. */
unsigned : 3;
unsigned ft : 5; /**< Fault type. */
unsigned e : 1; /**< Side-effect bit. */
unsigned ct : 2; /**< Context Register selection. */
unsigned pr : 1; /**< Privilege bit. */
unsigned w : 1; /**< Write bit. */
unsigned ow : 1; /**< Overwrite bit. */
unsigned fv : 1; /**< Fayult Valid bit. */
} __attribute__ ((packed));
};
typedef union tlb_sfsr_reg tlb_sfsr_reg_t;
/** Read MMU Primary Context Register.
*
* @return Current value of Primary Context Register.
*/
static inline __u64 mmu_primary_context_read(void)
{
return asi_u64_read(ASI_DMMU, VA_PRIMARY_CONTEXT_REG);
}
/** Write MMU Primary Context Register.
*
* @param v New value of Primary Context Register.
*/
static inline void mmu_primary_context_write(__u64 v)
{
asi_u64_write(ASI_DMMU, VA_PRIMARY_CONTEXT_REG, v);
flush();
}
/** Read MMU Secondary Context Register.
*
* @return Current value of Secondary Context Register.
*/
static inline __u64 mmu_secondary_context_read(void)
{
return asi_u64_read(ASI_DMMU, VA_SECONDARY_CONTEXT_REG);
}
/** Write MMU Primary Context Register.
*
* @param v New value of Primary Context Register.
*/
static inline void mmu_secondary_context_write(__u64 v)
{
asi_u64_write(ASI_DMMU, VA_PRIMARY_CONTEXT_REG, v);
flush();
}
/** Read IMMU TLB Data Access Register.
*
* @param entry TLB Entry index.
*
* @return Current value of specified IMMU TLB Data Access Register.
*/
static inline __u64 itlb_data_access_read(index_t entry)
{
tlb_data_access_addr_t reg;
reg.value = 0;
reg.tlb_entry = entry;
return asi_u64_read(ASI_ITLB_DATA_ACCESS_REG, reg.value);
}
/** Write IMMU TLB Data Access Register.
*
* @param entry TLB Entry index.
* @param value Value to be written.
*/
static inline void itlb_data_access_write(index_t entry, __u64 value)
{
tlb_data_access_addr_t reg;
reg.value = 0;
reg.tlb_entry = entry;
asi_u64_write(ASI_ITLB_DATA_ACCESS_REG, reg.value, value);
flush();
}
/** Read DMMU TLB Data Access Register.
*
* @param entry TLB Entry index.
*
* @return Current value of specified DMMU TLB Data Access Register.
*/
static inline __u64 dtlb_data_access_read(index_t entry)
{
tlb_data_access_addr_t reg;
reg.value = 0;
reg.tlb_entry = entry;
return asi_u64_read(ASI_DTLB_DATA_ACCESS_REG, reg.value);
}
/** Write DMMU TLB Data Access Register.
*
* @param entry TLB Entry index.
* @param value Value to be written.
*/
static inline void dtlb_data_access_write(index_t entry, __u64 value)
{
tlb_data_access_addr_t reg;
reg.value = 0;
reg.tlb_entry = entry;
asi_u64_write(ASI_DTLB_DATA_ACCESS_REG, reg.value, value);
flush();
}
/** Read IMMU TLB Tag Read Register.
*
* @param entry TLB Entry index.
*
* @return Current value of specified IMMU TLB Tag Read Register.
*/
static inline __u64 itlb_tag_read_read(index_t entry)
{
tlb_tag_read_addr_t tag;
tag.value = 0;
tag.tlb_entry = entry;
return asi_u64_read(ASI_ITLB_TAG_READ_REG, tag.value);
}
/** Read DMMU TLB Tag Read Register.
*
* @param entry TLB Entry index.
*
* @return Current value of specified DMMU TLB Tag Read Register.
*/
static inline __u64 dtlb_tag_read_read(index_t entry)
{
tlb_tag_read_addr_t tag;
tag.value = 0;
tag.tlb_entry = entry;
return asi_u64_read(ASI_DTLB_TAG_READ_REG, tag.value);
}
/** Write IMMU TLB Tag Access Register.
*
* @param v Value to be written.
*/
static inline void itlb_tag_access_write(__u64 v)
{
asi_u64_write(ASI_IMMU, VA_IMMU_TAG_ACCESS, v);
flush();
}
/** Write DMMU TLB Tag Access Register.
*
* @param v Value to be written.
*/
static inline void dtlb_tag_access_write(__u64 v)
{
asi_u64_write(ASI_DMMU, VA_DMMU_TAG_ACCESS, v);
flush();
}
/** Write IMMU TLB Data in Register.
*
* @param v Value to be written.
*/
static inline void itlb_data_in_write(__u64 v)
{
asi_u64_write(ASI_ITLB_DATA_IN_REG, 0, v);
flush();
}
/** Write DMMU TLB Data in Register.
*
* @param v Value to be written.
*/
static inline void dtlb_data_in_write(__u64 v)
{
asi_u64_write(ASI_DTLB_DATA_IN_REG, 0, v);
flush();
}
/** Read ITLB Synchronous Fault Status Register.
*
* @return Current content of I-SFSR register.
*/
static inline __u64 itlb_sfsr_read(void)
{
return asi_u64_read(ASI_IMMU, VA_IMMU_SFSR);
}
/** Write ITLB Synchronous Fault Status Register.
*
* @param v New value of I-SFSR register.
*/
static inline void itlb_sfsr_write(__u64 v)
{
asi_u64_write(ASI_IMMU, VA_IMMU_SFSR, v);
flush();
}
/** Read DTLB Synchronous Fault Status Register.
*
* @return Current content of D-SFSR register.
*/
static inline __u64 dtlb_sfsr_read(void)
{
return asi_u64_read(ASI_DMMU, VA_DMMU_SFSR);
}
/** Write DTLB Synchronous Fault Status Register.
*
* @param v New value of D-SFSR register.
*/
static inline void dtlb_sfsr_write(__u64 v)
{
asi_u64_write(ASI_DMMU, VA_DMMU_SFSR, v);
flush();
}
/** Read DTLB Synchronous Fault Address Register.
*
* @return Current content of D-SFAR register.
*/
static inline __u64 dtlb_sfar_read(void)
{
return asi_u64_read(ASI_DMMU, VA_DMMU_SFAR);
}
/** Perform IMMU TLB Demap Operation.
*
* @param type Selects between context and page demap.
* @param context_encoding Specifies which Context register has Context ID for demap.
* @param page Address which is on the page to be demapped.
*/
static inline void itlb_demap(int type, int context_encoding, __address page)
{
tlb_demap_addr_t da;
page_address_t pg;
da.value = 0;
pg.address = page;
da.type = type;
da.context = context_encoding;
da.vpn = pg.vpn;
asi_u64_write(ASI_IMMU_DEMAP, da.value, 0);
flush();
}
/** Perform DMMU TLB Demap Operation.
*
* @param type Selects between context and page demap.
* @param context_encoding Specifies which Context register has Context ID for demap.
* @param page Address which is on the page to be demapped.
*/
static inline void dtlb_demap(int type, int context_encoding, __address page)
{
tlb_demap_addr_t da;
page_address_t pg;
da.value = 0;
pg.address = page;
da.type = type;
da.context = context_encoding;
da.vpn = pg.vpn;
asi_u64_write(ASI_DMMU_DEMAP, da.value, 0);
flush();
}
extern void fast_instruction_access_mmu_miss(void);
extern void fast_data_access_mmu_miss(void);
extern void fast_data_access_protection(void);
#endif