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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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341 lines
9.0 KiB
C
341 lines
9.0 KiB
C
/* spitfire.h: SpitFire/BlackBird/Cheetah inline MMU operations.
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*
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* Copyright (C) 1996 David S. Miller (davem@davemloft.net)
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*/
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#ifndef _SPARC64_SPITFIRE_H
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#define _SPARC64_SPITFIRE_H
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#include <asm/asi.h>
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/* The following register addresses are accessible via ASI_DMMU
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* and ASI_IMMU, that is there is a distinct and unique copy of
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* each these registers for each TLB.
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*/
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#define TSB_TAG_TARGET 0x0000000000000000 /* All chips */
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#define TLB_SFSR 0x0000000000000018 /* All chips */
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#define TSB_REG 0x0000000000000028 /* All chips */
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#define TLB_TAG_ACCESS 0x0000000000000030 /* All chips */
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#define VIRT_WATCHPOINT 0x0000000000000038 /* All chips */
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#define PHYS_WATCHPOINT 0x0000000000000040 /* All chips */
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#define TSB_EXTENSION_P 0x0000000000000048 /* Ultra-III and later */
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#define TSB_EXTENSION_S 0x0000000000000050 /* Ultra-III and later, D-TLB only */
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#define TSB_EXTENSION_N 0x0000000000000058 /* Ultra-III and later */
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#define TLB_TAG_ACCESS_EXT 0x0000000000000060 /* Ultra-III+ and later */
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/* These registers only exist as one entity, and are accessed
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* via ASI_DMMU only.
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*/
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#define PRIMARY_CONTEXT 0x0000000000000008
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#define SECONDARY_CONTEXT 0x0000000000000010
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#define DMMU_SFAR 0x0000000000000020
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#define VIRT_WATCHPOINT 0x0000000000000038
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#define PHYS_WATCHPOINT 0x0000000000000040
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#define SPITFIRE_HIGHEST_LOCKED_TLBENT (64 - 1)
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#define CHEETAH_HIGHEST_LOCKED_TLBENT (16 - 1)
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#define L1DCACHE_SIZE 0x4000
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#define SUN4V_CHIP_INVALID 0x00
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#define SUN4V_CHIP_NIAGARA1 0x01
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#define SUN4V_CHIP_NIAGARA2 0x02
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#define SUN4V_CHIP_UNKNOWN 0xff
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#ifndef __ASSEMBLY__
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enum ultra_tlb_layout {
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spitfire = 0,
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cheetah = 1,
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cheetah_plus = 2,
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hypervisor = 3,
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};
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extern enum ultra_tlb_layout tlb_type;
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extern int sun4v_chip_type;
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extern int cheetah_pcache_forced_on;
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extern void cheetah_enable_pcache(void);
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#define sparc64_highest_locked_tlbent() \
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(tlb_type == spitfire ? \
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SPITFIRE_HIGHEST_LOCKED_TLBENT : \
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CHEETAH_HIGHEST_LOCKED_TLBENT)
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/* The data cache is write through, so this just invalidates the
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* specified line.
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*/
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static inline void spitfire_put_dcache_tag(unsigned long addr, unsigned long tag)
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{
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__asm__ __volatile__("stxa %0, [%1] %2\n\t"
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"membar #Sync"
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: /* No outputs */
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: "r" (tag), "r" (addr), "i" (ASI_DCACHE_TAG));
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}
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/* The instruction cache lines are flushed with this, but note that
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* this does not flush the pipeline. It is possible for a line to
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* get flushed but stale instructions to still be in the pipeline,
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* a flush instruction (to any address) is sufficient to handle
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* this issue after the line is invalidated.
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*/
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static inline void spitfire_put_icache_tag(unsigned long addr, unsigned long tag)
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{
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__asm__ __volatile__("stxa %0, [%1] %2\n\t"
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"membar #Sync"
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: /* No outputs */
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: "r" (tag), "r" (addr), "i" (ASI_IC_TAG));
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}
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static inline unsigned long spitfire_get_dtlb_data(int entry)
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{
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unsigned long data;
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__asm__ __volatile__("ldxa [%1] %2, %0"
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: "=r" (data)
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: "r" (entry << 3), "i" (ASI_DTLB_DATA_ACCESS));
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/* Clear TTE diag bits. */
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data &= ~0x0003fe0000000000UL;
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return data;
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}
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static inline unsigned long spitfire_get_dtlb_tag(int entry)
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{
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unsigned long tag;
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__asm__ __volatile__("ldxa [%1] %2, %0"
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: "=r" (tag)
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: "r" (entry << 3), "i" (ASI_DTLB_TAG_READ));
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return tag;
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}
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static inline void spitfire_put_dtlb_data(int entry, unsigned long data)
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{
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__asm__ __volatile__("stxa %0, [%1] %2\n\t"
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"membar #Sync"
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: /* No outputs */
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: "r" (data), "r" (entry << 3),
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"i" (ASI_DTLB_DATA_ACCESS));
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}
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static inline unsigned long spitfire_get_itlb_data(int entry)
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{
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unsigned long data;
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__asm__ __volatile__("ldxa [%1] %2, %0"
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: "=r" (data)
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: "r" (entry << 3), "i" (ASI_ITLB_DATA_ACCESS));
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/* Clear TTE diag bits. */
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data &= ~0x0003fe0000000000UL;
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return data;
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}
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static inline unsigned long spitfire_get_itlb_tag(int entry)
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{
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unsigned long tag;
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__asm__ __volatile__("ldxa [%1] %2, %0"
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: "=r" (tag)
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: "r" (entry << 3), "i" (ASI_ITLB_TAG_READ));
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return tag;
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}
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static inline void spitfire_put_itlb_data(int entry, unsigned long data)
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{
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__asm__ __volatile__("stxa %0, [%1] %2\n\t"
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"membar #Sync"
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: /* No outputs */
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: "r" (data), "r" (entry << 3),
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"i" (ASI_ITLB_DATA_ACCESS));
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}
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static inline void spitfire_flush_dtlb_nucleus_page(unsigned long page)
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{
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__asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
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"membar #Sync"
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: /* No outputs */
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: "r" (page | 0x20), "i" (ASI_DMMU_DEMAP));
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}
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static inline void spitfire_flush_itlb_nucleus_page(unsigned long page)
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{
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__asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
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"membar #Sync"
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: /* No outputs */
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: "r" (page | 0x20), "i" (ASI_IMMU_DEMAP));
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}
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/* Cheetah has "all non-locked" tlb flushes. */
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static inline void cheetah_flush_dtlb_all(void)
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{
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__asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
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"membar #Sync"
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: /* No outputs */
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: "r" (0x80), "i" (ASI_DMMU_DEMAP));
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}
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static inline void cheetah_flush_itlb_all(void)
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{
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__asm__ __volatile__("stxa %%g0, [%0] %1\n\t"
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"membar #Sync"
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: /* No outputs */
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: "r" (0x80), "i" (ASI_IMMU_DEMAP));
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}
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/* Cheetah has a 4-tlb layout so direct access is a bit different.
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* The first two TLBs are fully assosciative, hold 16 entries, and are
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* used only for locked and >8K sized translations. One exists for
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* data accesses and one for instruction accesses.
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*
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* The third TLB is for data accesses to 8K non-locked translations, is
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* 2 way assosciative, and holds 512 entries. The fourth TLB is for
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* instruction accesses to 8K non-locked translations, is 2 way
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* assosciative, and holds 128 entries.
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*
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* Cheetah has some bug where bogus data can be returned from
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* ASI_{D,I}TLB_DATA_ACCESS loads, doing the load twice fixes
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* the problem for me. -DaveM
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*/
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static inline unsigned long cheetah_get_ldtlb_data(int entry)
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{
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unsigned long data;
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__asm__ __volatile__("ldxa [%1] %2, %%g0\n\t"
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"ldxa [%1] %2, %0"
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: "=r" (data)
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: "r" ((0 << 16) | (entry << 3)),
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"i" (ASI_DTLB_DATA_ACCESS));
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return data;
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}
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static inline unsigned long cheetah_get_litlb_data(int entry)
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{
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unsigned long data;
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__asm__ __volatile__("ldxa [%1] %2, %%g0\n\t"
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"ldxa [%1] %2, %0"
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: "=r" (data)
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: "r" ((0 << 16) | (entry << 3)),
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"i" (ASI_ITLB_DATA_ACCESS));
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return data;
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}
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static inline unsigned long cheetah_get_ldtlb_tag(int entry)
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{
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unsigned long tag;
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__asm__ __volatile__("ldxa [%1] %2, %0"
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: "=r" (tag)
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: "r" ((0 << 16) | (entry << 3)),
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"i" (ASI_DTLB_TAG_READ));
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return tag;
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}
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static inline unsigned long cheetah_get_litlb_tag(int entry)
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{
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unsigned long tag;
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__asm__ __volatile__("ldxa [%1] %2, %0"
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: "=r" (tag)
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: "r" ((0 << 16) | (entry << 3)),
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"i" (ASI_ITLB_TAG_READ));
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return tag;
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}
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static inline void cheetah_put_ldtlb_data(int entry, unsigned long data)
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{
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__asm__ __volatile__("stxa %0, [%1] %2\n\t"
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"membar #Sync"
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: /* No outputs */
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: "r" (data),
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"r" ((0 << 16) | (entry << 3)),
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"i" (ASI_DTLB_DATA_ACCESS));
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}
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static inline void cheetah_put_litlb_data(int entry, unsigned long data)
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{
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__asm__ __volatile__("stxa %0, [%1] %2\n\t"
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"membar #Sync"
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: /* No outputs */
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: "r" (data),
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"r" ((0 << 16) | (entry << 3)),
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"i" (ASI_ITLB_DATA_ACCESS));
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}
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static inline unsigned long cheetah_get_dtlb_data(int entry, int tlb)
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{
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unsigned long data;
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__asm__ __volatile__("ldxa [%1] %2, %%g0\n\t"
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"ldxa [%1] %2, %0"
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: "=r" (data)
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: "r" ((tlb << 16) | (entry << 3)), "i" (ASI_DTLB_DATA_ACCESS));
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return data;
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}
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static inline unsigned long cheetah_get_dtlb_tag(int entry, int tlb)
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{
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unsigned long tag;
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__asm__ __volatile__("ldxa [%1] %2, %0"
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: "=r" (tag)
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: "r" ((tlb << 16) | (entry << 3)), "i" (ASI_DTLB_TAG_READ));
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return tag;
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}
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static inline void cheetah_put_dtlb_data(int entry, unsigned long data, int tlb)
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{
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__asm__ __volatile__("stxa %0, [%1] %2\n\t"
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"membar #Sync"
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: /* No outputs */
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: "r" (data),
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"r" ((tlb << 16) | (entry << 3)),
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"i" (ASI_DTLB_DATA_ACCESS));
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}
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static inline unsigned long cheetah_get_itlb_data(int entry)
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{
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unsigned long data;
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__asm__ __volatile__("ldxa [%1] %2, %%g0\n\t"
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"ldxa [%1] %2, %0"
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: "=r" (data)
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: "r" ((2 << 16) | (entry << 3)),
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"i" (ASI_ITLB_DATA_ACCESS));
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return data;
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}
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static inline unsigned long cheetah_get_itlb_tag(int entry)
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{
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unsigned long tag;
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__asm__ __volatile__("ldxa [%1] %2, %0"
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: "=r" (tag)
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: "r" ((2 << 16) | (entry << 3)), "i" (ASI_ITLB_TAG_READ));
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return tag;
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}
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static inline void cheetah_put_itlb_data(int entry, unsigned long data)
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{
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__asm__ __volatile__("stxa %0, [%1] %2\n\t"
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"membar #Sync"
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: /* No outputs */
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: "r" (data), "r" ((2 << 16) | (entry << 3)),
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"i" (ASI_ITLB_DATA_ACCESS));
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}
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#endif /* !(__ASSEMBLY__) */
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#endif /* !(_SPARC64_SPITFIRE_H) */
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