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/* $Id: spitfire.h,v 1.18 2001/11/29 16:42:10 kanoj Exp $
* spitfire.h: SpitFire/BlackBird/Cheetah inline MMU operations.
*
* Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
*/
#ifndef _SPARC64_SPITFIRE_H
#define _SPARC64_SPITFIRE_H
#include <asm/asi.h>
/* The following register addresses are accessible via ASI_DMMU
* and ASI_IMMU, that is there is a distinct and unique copy of
* each these registers for each TLB.
*/
#define TSB_TAG_TARGET 0x0000000000000000 /* All chips */
#define TLB_SFSR 0x0000000000000018 /* All chips */
#define TSB_REG 0x0000000000000028 /* All chips */
#define TLB_TAG_ACCESS 0x0000000000000030 /* All chips */
#define VIRT_WATCHPOINT 0x0000000000000038 /* All chips */
#define PHYS_WATCHPOINT 0x0000000000000040 /* All chips */
#define TSB_EXTENSION_P 0x0000000000000048 /* Ultra-III and later */
#define TSB_EXTENSION_S 0x0000000000000050 /* Ultra-III and later, D-TLB only */
#define TSB_EXTENSION_N 0x0000000000000058 /* Ultra-III and later */
#define TLB_TAG_ACCESS_EXT 0x0000000000000060 /* Ultra-III+ and later */
/* These registers only exist as one entity, and are accessed
* via ASI_DMMU only.
*/
#define PRIMARY_CONTEXT 0x0000000000000008
#define SECONDARY_CONTEXT 0x0000000000000010
#define DMMU_SFAR 0x0000000000000020
#define VIRT_WATCHPOINT 0x0000000000000038
#define PHYS_WATCHPOINT 0x0000000000000040
#define SPITFIRE_HIGHEST_LOCKED_TLBENT (64 - 1)
#define CHEETAH_HIGHEST_LOCKED_TLBENT (16 - 1)
#define L1DCACHE_SIZE 0x4000
#ifndef __ASSEMBLY__
enum ultra_tlb_layout {
spitfire = 0,
cheetah = 1,
cheetah_plus = 2,
};
extern enum ultra_tlb_layout tlb_type;
extern int cheetah_pcache_forced_on;
extern void cheetah_enable_pcache(void);
#define sparc64_highest_locked_tlbent() \
(tlb_type == spitfire ? \
SPITFIRE_HIGHEST_LOCKED_TLBENT : \
CHEETAH_HIGHEST_LOCKED_TLBENT)
/* The data cache is write through, so this just invalidates the
* specified line.
*/
static __inline__ void spitfire_put_dcache_tag(unsigned long addr, unsigned long tag)
{
__asm__ __volatile__("stxa %0, [%1] %2\n\t"
"membar #Sync"
: /* No outputs */
: "r" (tag), "r" (addr), "i" (ASI_DCACHE_TAG));
}
/* The instruction cache lines are flushed with this, but note that
* this does not flush the pipeline. It is possible for a line to
* get flushed but stale instructions to still be in the pipeline,
* a flush instruction (to any address) is sufficient to handle
* this issue after the line is invalidated.
*/
static __inline__ void spitfire_put_icache_tag(unsigned long addr, unsigned long tag)
{
__asm__ __volatile__("stxa %0, [%1] %2\n\t"
"membar #Sync"
: /* No outputs */
: "r" (tag), "r" (addr), "i" (ASI_IC_TAG));
}
static __inline__ unsigned long spitfire_get_dtlb_data(int entry)
{
unsigned long data;
__asm__ __volatile__("ldxa [%1] %2, %0"
: "=r" (data)
: "r" (entry << 3), "i" (ASI_DTLB_DATA_ACCESS));
/* Clear TTE diag bits. */
data &= ~0x0003fe0000000000UL;
return data;
}
static __inline__ unsigned long spitfire_get_dtlb_tag(int entry)
{
unsigned long tag;
__asm__ __volatile__("ldxa [%1] %2, %0"
: "=r" (tag)
: "r" (entry << 3), "i" (ASI_DTLB_TAG_READ));
return tag;
}
static __inline__ void spitfire_put_dtlb_data(int entry, unsigned long data)
{
__asm__ __volatile__("stxa %0, [%1] %2\n\t"
"membar #Sync"
: /* No outputs */
: "r" (data), "r" (entry << 3),
"i" (ASI_DTLB_DATA_ACCESS));
}
static __inline__ unsigned long spitfire_get_itlb_data(int entry)
{
unsigned long data;
__asm__ __volatile__("ldxa [%1] %2, %0"
: "=r" (data)
: "r" (entry << 3), "i" (ASI_ITLB_DATA_ACCESS));
/* Clear TTE diag bits. */
data &= ~0x0003fe0000000000UL;
return data;
}
static __inline__ unsigned long spitfire_get_itlb_tag(int entry)
{
unsigned long tag;
__asm__ __volatile__("ldxa [%1] %2, %0"
: "=r" (tag)
: "r" (entry << 3), "i" (ASI_ITLB_TAG_READ));
return tag;
}
static __inline__ void spitfire_put_itlb_data(int entry, unsigned long data)
{
__asm__ __volatile__("stxa %0, [%1] %2\n\t"
"membar #Sync"
: /* No outputs */
: "r" (data), "r" (entry << 3),
"i" (ASI_ITLB_DATA_ACCESS));
}
static __inline__ void spitfire_flush_dtlb_nucleus_page(unsigned long page)
{
__asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
"membar #Sync"
: /* No outputs */
: "r" (page | 0x20), "i" (ASI_DMMU_DEMAP));
}
static __inline__ void spitfire_flush_itlb_nucleus_page(unsigned long page)
{
__asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
"membar #Sync"
: /* No outputs */
: "r" (page | 0x20), "i" (ASI_IMMU_DEMAP));
}
/* Cheetah has "all non-locked" tlb flushes. */
static __inline__ void cheetah_flush_dtlb_all(void)
{
__asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
"membar #Sync"
: /* No outputs */
: "r" (0x80), "i" (ASI_DMMU_DEMAP));
}
static __inline__ void cheetah_flush_itlb_all(void)
{
__asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
"membar #Sync"
: /* No outputs */
: "r" (0x80), "i" (ASI_IMMU_DEMAP));
}
/* Cheetah has a 4-tlb layout so direct access is a bit different.
* The first two TLBs are fully assosciative, hold 16 entries, and are
* used only for locked and >8K sized translations. One exists for
* data accesses and one for instruction accesses.
*
* The third TLB is for data accesses to 8K non-locked translations, is
* 2 way assosciative, and holds 512 entries. The fourth TLB is for
* instruction accesses to 8K non-locked translations, is 2 way
* assosciative, and holds 128 entries.
*
* Cheetah has some bug where bogus data can be returned from
* ASI_{D,I}TLB_DATA_ACCESS loads, doing the load twice fixes
* the problem for me. -DaveM
*/
static __inline__ unsigned long cheetah_get_ldtlb_data(int entry)
{
unsigned long data;
__asm__ __volatile__("ldxa [%1] %2, %%g0\n\t"
"ldxa [%1] %2, %0"
: "=r" (data)
: "r" ((0 << 16) | (entry << 3)),
"i" (ASI_DTLB_DATA_ACCESS));
return data;
}
static __inline__ unsigned long cheetah_get_litlb_data(int entry)
{
unsigned long data;
__asm__ __volatile__("ldxa [%1] %2, %%g0\n\t"
"ldxa [%1] %2, %0"
: "=r" (data)
: "r" ((0 << 16) | (entry << 3)),
"i" (ASI_ITLB_DATA_ACCESS));
return data;
}
static __inline__ unsigned long cheetah_get_ldtlb_tag(int entry)
{
unsigned long tag;
__asm__ __volatile__("ldxa [%1] %2, %0"
: "=r" (tag)
: "r" ((0 << 16) | (entry << 3)),
"i" (ASI_DTLB_TAG_READ));
return tag;
}
static __inline__ unsigned long cheetah_get_litlb_tag(int entry)
{
unsigned long tag;
__asm__ __volatile__("ldxa [%1] %2, %0"
: "=r" (tag)
: "r" ((0 << 16) | (entry << 3)),
"i" (ASI_ITLB_TAG_READ));
return tag;
}
static __inline__ void cheetah_put_ldtlb_data(int entry, unsigned long data)
{
__asm__ __volatile__("stxa %0, [%1] %2\n\t"
"membar #Sync"
: /* No outputs */
: "r" (data),
"r" ((0 << 16) | (entry << 3)),
"i" (ASI_DTLB_DATA_ACCESS));
}
static __inline__ void cheetah_put_litlb_data(int entry, unsigned long data)
{
__asm__ __volatile__("stxa %0, [%1] %2\n\t"
"membar #Sync"
: /* No outputs */
: "r" (data),
"r" ((0 << 16) | (entry << 3)),
"i" (ASI_ITLB_DATA_ACCESS));
}
static __inline__ unsigned long cheetah_get_dtlb_data(int entry, int tlb)
{
unsigned long data;
__asm__ __volatile__("ldxa [%1] %2, %%g0\n\t"
"ldxa [%1] %2, %0"
: "=r" (data)
: "r" ((tlb << 16) | (entry << 3)), "i" (ASI_DTLB_DATA_ACCESS));
return data;
}
static __inline__ unsigned long cheetah_get_dtlb_tag(int entry, int tlb)
{
unsigned long tag;
__asm__ __volatile__("ldxa [%1] %2, %0"
: "=r" (tag)
: "r" ((tlb << 16) | (entry << 3)), "i" (ASI_DTLB_TAG_READ));
return tag;
}
static __inline__ void cheetah_put_dtlb_data(int entry, unsigned long data, int tlb)
{
__asm__ __volatile__("stxa %0, [%1] %2\n\t"
"membar #Sync"
: /* No outputs */
: "r" (data),
"r" ((tlb << 16) | (entry << 3)),
"i" (ASI_DTLB_DATA_ACCESS));
}
static __inline__ unsigned long cheetah_get_itlb_data(int entry)
{
unsigned long data;
__asm__ __volatile__("ldxa [%1] %2, %%g0\n\t"
"ldxa [%1] %2, %0"
: "=r" (data)
: "r" ((2 << 16) | (entry << 3)),
"i" (ASI_ITLB_DATA_ACCESS));
return data;
}
static __inline__ unsigned long cheetah_get_itlb_tag(int entry)
{
unsigned long tag;
__asm__ __volatile__("ldxa [%1] %2, %0"
: "=r" (tag)
: "r" ((2 << 16) | (entry << 3)), "i" (ASI_ITLB_TAG_READ));
return tag;
}
static __inline__ void cheetah_put_itlb_data(int entry, unsigned long data)
{
__asm__ __volatile__("stxa %0, [%1] %2\n\t"
"membar #Sync"
: /* No outputs */
: "r" (data), "r" ((2 << 16) | (entry << 3)),
"i" (ASI_ITLB_DATA_ACCESS));
}
#endif /* !(__ASSEMBLY__) */
#endif /* !(_SPARC64_SPITFIRE_H) */
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