/*
* Copyright (C) 2005 - 2006 Jakub Jermar
* Copyright (C) 2006 Jakub Vana
* 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.
*/
/** @addtogroup ia64mm
* @{
*/
/** @file
*/
#ifndef KERN_ia64_PAGE_H_
#define KERN_ia64_PAGE_H_
#include <arch/mm/frame.h>
#define PAGE_SIZE FRAME_SIZE
#define PAGE_WIDTH FRAME_WIDTH
#ifdef KERNEL
/** Bit width of the TLB-locked portion of kernel address space. */
#define KERNEL_PAGE_WIDTH 28 /* 256M */
#define PPN_SHIFT 12
#define VRN_SHIFT 61
#define VRN_MASK (7LL << VRN_SHIFT)
#define VA2VRN(va) ((va)>>VRN_SHIFT)
#ifdef __ASM__
#define VRN_KERNEL 7
#else
#define VRN_KERNEL 7LL
#endif
#define REGION_REGISTERS 8
#define KA2PA(x) ((uintptr_t) (x-(VRN_KERNEL<<VRN_SHIFT)))
#define PA2KA(x) ((uintptr_t) (x+(VRN_KERNEL<<VRN_SHIFT)))
#define VHPT_WIDTH 20 /* 1M */
#define VHPT_SIZE (1 << VHPT_WIDTH)
#define PTA_BASE_SHIFT 15
/** Memory Attributes. */
#define MA_WRITEBACK 0x0
#define MA_UNCACHEABLE 0x4
/** Privilege Levels. Only the most and the least privileged ones are ever used. */
#define PL_KERNEL 0x0
#define PL_USER 0x3
/* Access Rigths. Only certain combinations are used by the kernel. */
#define AR_READ 0x0
#define AR_EXECUTE 0x1
#define AR_WRITE 0x2
#ifndef __ASM__
#include <arch/mm/frame.h>
#include <arch/barrier.h>
#include <genarch/mm/page_ht.h>
#include <arch/mm/asid.h>
#include <arch/types.h>
#include <typedefs.h>
#include <debug.h>
struct vhpt_tag_info {
unsigned long long tag : 63;
unsigned ti : 1;
} __attribute__ ((packed));
union vhpt_tag {
struct vhpt_tag_info tag_info;
unsigned tag_word;
};
struct vhpt_entry_present {
/* Word 0 */
unsigned p : 1;
unsigned : 1;
unsigned ma : 3;
unsigned a : 1;
unsigned d : 1;
unsigned pl : 2;
unsigned ar : 3;
unsigned long long ppn : 38;
unsigned : 2;
unsigned ed : 1;
unsigned ig1 : 11;
/* Word 1 */
unsigned : 2;
unsigned ps : 6;
unsigned key : 24;
unsigned : 32;
/* Word 2 */
union vhpt_tag tag;
/* Word 3 */
uint64_t ig3 : 64;
} __attribute__ ((packed));
struct vhpt_entry_not_present {
/* Word 0 */
unsigned p : 1;
unsigned long long ig0 : 52;
unsigned ig1 : 11;
/* Word 1 */
unsigned : 2;
unsigned ps : 6;
unsigned long long ig2 : 56;
/* Word 2 */
union vhpt_tag tag;
/* Word 3 */
uint64_t ig3 : 64;
} __attribute__ ((packed));
typedef union vhpt_entry {
struct vhpt_entry_present present;
struct vhpt_entry_not_present not_present;
uint64_t word[4];
} vhpt_entry_t;
struct region_register_map {
unsigned ve : 1;
unsigned : 1;
unsigned ps : 6;
unsigned rid : 24;
unsigned : 32;
} __attribute__ ((packed));
typedef union region_register {
struct region_register_map map;
unsigned long long word;
} region_register;
struct pta_register_map {
unsigned ve : 1;
unsigned : 1;
unsigned size : 6;
unsigned vf : 1;
unsigned : 6;
unsigned long long base : 49;
} __attribute__ ((packed));
typedef union pta_register {
struct pta_register_map map;
uint64_t word;
} pta_register;
/** Return Translation Hashed Entry Address.
*
* VRN bits are used to read RID (ASID) from one
* of the eight region registers registers.
*
* @param va Virtual address including VRN bits.
*
* @return Address of the head of VHPT collision chain.
*/
static inline uint64_t thash(uint64_t va)
{
uint64_t ret;
__asm__ volatile ("thash %0 = %1\n" : "=r" (ret) : "r" (va));
return ret;
}
/** Return Translation Hashed Entry Tag.
*
* VRN bits are used to read RID (ASID) from one
* of the eight region registers.
*
* @param va Virtual address including VRN bits.
*
* @return The unique tag for VPN and RID in the collision chain returned by thash().
*/
static inline uint64_t ttag(uint64_t va)
{
uint64_t ret;
__asm__ volatile ("ttag %0 = %1\n" : "=r" (ret) : "r" (va));
return ret;
}
/** Read Region Register.
*
* @param i Region register index.
*
* @return Current contents of rr[i].
*/
static inline uint64_t rr_read(index_t i)
{
uint64_t ret;
ASSERT(i < REGION_REGISTERS);
__asm__ volatile ("mov %0 = rr[%1]\n" : "=r" (ret) : "r" (i << VRN_SHIFT));
return ret;
}
/** Write Region Register.
*
* @param i Region register index.
* @param v Value to be written to rr[i].
*/
static inline void rr_write(index_t i, uint64_t v)
{
ASSERT(i < REGION_REGISTERS);
__asm__ volatile (
"mov rr[%0] = %1\n"
:
: "r" (i << VRN_SHIFT), "r" (v)
);
}
/** Read Page Table Register.
*
* @return Current value stored in PTA.
*/
static inline uint64_t pta_read(void)
{
uint64_t ret;
__asm__ volatile ("mov %0 = cr.pta\n" : "=r" (ret));
return ret;
}
/** Write Page Table Register.
*
* @param v New value to be stored in PTA.
*/
static inline void pta_write(uint64_t v)
{
__asm__ volatile ("mov cr.pta = %0\n" : : "r" (v));
}
extern void page_arch_init(void);
extern vhpt_entry_t *vhpt_hash(uintptr_t page, asid_t asid);
extern bool vhpt_compare(uintptr_t page, asid_t asid, vhpt_entry_t *v);
extern void vhpt_set_record(vhpt_entry_t *v, uintptr_t page, asid_t asid, uintptr_t frame, int flags);
#endif /* __ASM__ */
#endif /* KERNEL */
#endif
/** @}
*/