diff options
Diffstat (limited to 'arch/mips/include/asm/r4kcache.h')
| -rw-r--r-- | arch/mips/include/asm/r4kcache.h | 443 |
1 files changed, 443 insertions, 0 deletions
diff --git a/arch/mips/include/asm/r4kcache.h b/arch/mips/include/asm/r4kcache.h new file mode 100644 index 0000000..4c140db --- /dev/null +++ b/arch/mips/include/asm/r4kcache.h @@ -0,0 +1,443 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * Inline assembly cache operations. + * + * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com) + * Copyright (C) 1997 - 2002 Ralf Baechle (ralf@gnu.org) + * Copyright (C) 2004 Ralf Baechle (ralf@linux-mips.org) + */ +#ifndef _ASM_R4KCACHE_H +#define _ASM_R4KCACHE_H + +#include <asm/asm.h> +#include <asm/cacheops.h> +#include <asm/cpu-features.h> +#include <asm/mipsmtregs.h> + +/* + * This macro return a properly sign-extended address suitable as base address + * for indexed cache operations. Two issues here: + * + * - The MIPS32 and MIPS64 specs permit an implementation to directly derive + * the index bits from the virtual address. This breaks with tradition + * set by the R4000. To keep unpleasant surprises from happening we pick + * an address in KSEG0 / CKSEG0. + * - We need a properly sign extended address for 64-bit code. To get away + * without ifdefs we let the compiler do it by a type cast. + */ +#define INDEX_BASE CKSEG0 + +#define cache_op(op,addr) \ + __asm__ __volatile__( \ + " .set push \n" \ + " .set noreorder \n" \ + " .set mips3\n\t \n" \ + " cache %0, %1 \n" \ + " .set pop \n" \ + : \ + : "i" (op), "R" (*(unsigned char *)(addr))) + +#ifdef CONFIG_MIPS_MT +/* + * Temporary hacks for SMTC debug. Optionally force single-threaded + * execution during I-cache flushes. + */ + +#define PROTECT_CACHE_FLUSHES 1 + +#ifdef PROTECT_CACHE_FLUSHES + +extern int mt_protiflush; +extern int mt_protdflush; +extern void mt_cflush_lockdown(void); +extern void mt_cflush_release(void); + +#define BEGIN_MT_IPROT \ + unsigned long flags = 0; \ + unsigned long mtflags = 0; \ + if(mt_protiflush) { \ + local_irq_save(flags); \ + ehb(); \ + mtflags = dvpe(); \ + mt_cflush_lockdown(); \ + } + +#define END_MT_IPROT \ + if(mt_protiflush) { \ + mt_cflush_release(); \ + evpe(mtflags); \ + local_irq_restore(flags); \ + } + +#define BEGIN_MT_DPROT \ + unsigned long flags = 0; \ + unsigned long mtflags = 0; \ + if(mt_protdflush) { \ + local_irq_save(flags); \ + ehb(); \ + mtflags = dvpe(); \ + mt_cflush_lockdown(); \ + } + +#define END_MT_DPROT \ + if(mt_protdflush) { \ + mt_cflush_release(); \ + evpe(mtflags); \ + local_irq_restore(flags); \ + } + +#else + +#define BEGIN_MT_IPROT +#define BEGIN_MT_DPROT +#define END_MT_IPROT +#define END_MT_DPROT + +#endif /* PROTECT_CACHE_FLUSHES */ + +#define __iflush_prologue \ + unsigned long redundance; \ + extern int mt_n_iflushes; \ + BEGIN_MT_IPROT \ + for (redundance = 0; redundance < mt_n_iflushes; redundance++) { + +#define __iflush_epilogue \ + END_MT_IPROT \ + } + +#define __dflush_prologue \ + unsigned long redundance; \ + extern int mt_n_dflushes; \ + BEGIN_MT_DPROT \ + for (redundance = 0; redundance < mt_n_dflushes; redundance++) { + +#define __dflush_epilogue \ + END_MT_DPROT \ + } + +#define __inv_dflush_prologue __dflush_prologue +#define __inv_dflush_epilogue __dflush_epilogue +#define __sflush_prologue { +#define __sflush_epilogue } +#define __inv_sflush_prologue __sflush_prologue +#define __inv_sflush_epilogue __sflush_epilogue + +#else /* CONFIG_MIPS_MT */ + +#define __iflush_prologue { +#define __iflush_epilogue } +#define __dflush_prologue { +#define __dflush_epilogue } +#define __inv_dflush_prologue { +#define __inv_dflush_epilogue } +#define __sflush_prologue { +#define __sflush_epilogue } +#define __inv_sflush_prologue { +#define __inv_sflush_epilogue } + +#endif /* CONFIG_MIPS_MT */ + +static inline void flush_icache_line_indexed(unsigned long addr) +{ + __iflush_prologue + cache_op(Index_Invalidate_I, addr); + __iflush_epilogue +} + +static inline void flush_dcache_line_indexed(unsigned long addr) +{ + __dflush_prologue + cache_op(Index_Writeback_Inv_D, addr); + __dflush_epilogue +} + +static inline void flush_scache_line_indexed(unsigned long addr) +{ + cache_op(Index_Writeback_Inv_SD, addr); +} + +static inline void flush_icache_line(unsigned long addr) +{ + __iflush_prologue + cache_op(Hit_Invalidate_I, addr); + __iflush_epilogue +} + +static inline void flush_dcache_line(unsigned long addr) +{ + __dflush_prologue + cache_op(Hit_Writeback_Inv_D, addr); + __dflush_epilogue +} + +static inline void invalidate_dcache_line(unsigned long addr) +{ + __dflush_prologue + cache_op(Hit_Invalidate_D, addr); + __dflush_epilogue +} + +static inline void invalidate_scache_line(unsigned long addr) +{ + cache_op(Hit_Invalidate_SD, addr); +} + +static inline void flush_scache_line(unsigned long addr) +{ + cache_op(Hit_Writeback_Inv_SD, addr); +} + +#define protected_cache_op(op,addr) \ + __asm__ __volatile__( \ + " .set push \n" \ + " .set noreorder \n" \ + " .set mips3 \n" \ + "1: cache %0, (%1) \n" \ + "2: .set pop \n" \ + " .section __ex_table,\"a\" \n" \ + " "STR(PTR)" 1b, 2b \n" \ + " .previous" \ + : \ + : "i" (op), "r" (addr)) + +/* + * The next two are for badland addresses like signal trampolines. + */ +static inline void protected_flush_icache_line(unsigned long addr) +{ + protected_cache_op(Hit_Invalidate_I, addr); +} + +/* + * R10000 / R12000 hazard - these processors don't support the Hit_Writeback_D + * cacheop so we use Hit_Writeback_Inv_D which is supported by all R4000-style + * caches. We're talking about one cacheline unnecessarily getting invalidated + * here so the penalty isn't overly hard. + */ +static inline void protected_writeback_dcache_line(unsigned long addr) +{ + protected_cache_op(Hit_Writeback_Inv_D, addr); +} + +static inline void protected_writeback_scache_line(unsigned long addr) +{ + protected_cache_op(Hit_Writeback_Inv_SD, addr); +} + +/* + * This one is RM7000-specific + */ +static inline void invalidate_tcache_page(unsigned long addr) +{ + cache_op(Page_Invalidate_T, addr); +} + +#define cache16_unroll32(base,op) \ + __asm__ __volatile__( \ + " .set push \n" \ + " .set noreorder \n" \ + " .set mips3 \n" \ + " cache %1, 0x000(%0); cache %1, 0x010(%0) \n" \ + " cache %1, 0x020(%0); cache %1, 0x030(%0) \n" \ + " cache %1, 0x040(%0); cache %1, 0x050(%0) \n" \ + " cache %1, 0x060(%0); cache %1, 0x070(%0) \n" \ + " cache %1, 0x080(%0); cache %1, 0x090(%0) \n" \ + " cache %1, 0x0a0(%0); cache %1, 0x0b0(%0) \n" \ + " cache %1, 0x0c0(%0); cache %1, 0x0d0(%0) \n" \ + " cache %1, 0x0e0(%0); cache %1, 0x0f0(%0) \n" \ + " cache %1, 0x100(%0); cache %1, 0x110(%0) \n" \ + " cache %1, 0x120(%0); cache %1, 0x130(%0) \n" \ + " cache %1, 0x140(%0); cache %1, 0x150(%0) \n" \ + " cache %1, 0x160(%0); cache %1, 0x170(%0) \n" \ + " cache %1, 0x180(%0); cache %1, 0x190(%0) \n" \ + " cache %1, 0x1a0(%0); cache %1, 0x1b0(%0) \n" \ + " cache %1, 0x1c0(%0); cache %1, 0x1d0(%0) \n" \ + " cache %1, 0x1e0(%0); cache %1, 0x1f0(%0) \n" \ + " .set pop \n" \ + : \ + : "r" (base), \ + "i" (op)); + +#define cache32_unroll32(base,op) \ + __asm__ __volatile__( \ + " .set push \n" \ + " .set noreorder \n" \ + " .set mips3 \n" \ + " cache %1, 0x000(%0); cache %1, 0x020(%0) \n" \ + " cache %1, 0x040(%0); cache %1, 0x060(%0) \n" \ + " cache %1, 0x080(%0); cache %1, 0x0a0(%0) \n" \ + " cache %1, 0x0c0(%0); cache %1, 0x0e0(%0) \n" \ + " cache %1, 0x100(%0); cache %1, 0x120(%0) \n" \ + " cache %1, 0x140(%0); cache %1, 0x160(%0) \n" \ + " cache %1, 0x180(%0); cache %1, 0x1a0(%0) \n" \ + " cache %1, 0x1c0(%0); cache %1, 0x1e0(%0) \n" \ + " cache %1, 0x200(%0); cache %1, 0x220(%0) \n" \ + " cache %1, 0x240(%0); cache %1, 0x260(%0) \n" \ + " cache %1, 0x280(%0); cache %1, 0x2a0(%0) \n" \ + " cache %1, 0x2c0(%0); cache %1, 0x2e0(%0) \n" \ + " cache %1, 0x300(%0); cache %1, 0x320(%0) \n" \ + " cache %1, 0x340(%0); cache %1, 0x360(%0) \n" \ + " cache %1, 0x380(%0); cache %1, 0x3a0(%0) \n" \ + " cache %1, 0x3c0(%0); cache %1, 0x3e0(%0) \n" \ + " .set pop \n" \ + : \ + : "r" (base), \ + "i" (op)); + +#define cache64_unroll32(base,op) \ + __asm__ __volatile__( \ + " .set push \n" \ + " .set noreorder \n" \ + " .set mips3 \n" \ + " cache %1, 0x000(%0); cache %1, 0x040(%0) \n" \ + " cache %1, 0x080(%0); cache %1, 0x0c0(%0) \n" \ + " cache %1, 0x100(%0); cache %1, 0x140(%0) \n" \ + " cache %1, 0x180(%0); cache %1, 0x1c0(%0) \n" \ + " cache %1, 0x200(%0); cache %1, 0x240(%0) \n" \ + " cache %1, 0x280(%0); cache %1, 0x2c0(%0) \n" \ + " cache %1, 0x300(%0); cache %1, 0x340(%0) \n" \ + " cache %1, 0x380(%0); cache %1, 0x3c0(%0) \n" \ + " cache %1, 0x400(%0); cache %1, 0x440(%0) \n" \ + " cache %1, 0x480(%0); cache %1, 0x4c0(%0) \n" \ + " cache %1, 0x500(%0); cache %1, 0x540(%0) \n" \ + " cache %1, 0x580(%0); cache %1, 0x5c0(%0) \n" \ + " cache %1, 0x600(%0); cache %1, 0x640(%0) \n" \ + " cache %1, 0x680(%0); cache %1, 0x6c0(%0) \n" \ + " cache %1, 0x700(%0); cache %1, 0x740(%0) \n" \ + " cache %1, 0x780(%0); cache %1, 0x7c0(%0) \n" \ + " .set pop \n" \ + : \ + : "r" (base), \ + "i" (op)); + +#define cache128_unroll32(base,op) \ + __asm__ __volatile__( \ + " .set push \n" \ + " .set noreorder \n" \ + " .set mips3 \n" \ + " cache %1, 0x000(%0); cache %1, 0x080(%0) \n" \ + " cache %1, 0x100(%0); cache %1, 0x180(%0) \n" \ + " cache %1, 0x200(%0); cache %1, 0x280(%0) \n" \ + " cache %1, 0x300(%0); cache %1, 0x380(%0) \n" \ + " cache %1, 0x400(%0); cache %1, 0x480(%0) \n" \ + " cache %1, 0x500(%0); cache %1, 0x580(%0) \n" \ + " cache %1, 0x600(%0); cache %1, 0x680(%0) \n" \ + " cache %1, 0x700(%0); cache %1, 0x780(%0) \n" \ + " cache %1, 0x800(%0); cache %1, 0x880(%0) \n" \ + " cache %1, 0x900(%0); cache %1, 0x980(%0) \n" \ + " cache %1, 0xa00(%0); cache %1, 0xa80(%0) \n" \ + " cache %1, 0xb00(%0); cache %1, 0xb80(%0) \n" \ + " cache %1, 0xc00(%0); cache %1, 0xc80(%0) \n" \ + " cache %1, 0xd00(%0); cache %1, 0xd80(%0) \n" \ + " cache %1, 0xe00(%0); cache %1, 0xe80(%0) \n" \ + " cache %1, 0xf00(%0); cache %1, 0xf80(%0) \n" \ + " .set pop \n" \ + : \ + : "r" (base), \ + "i" (op)); + +/* build blast_xxx, blast_xxx_page, blast_xxx_page_indexed */ +#define __BUILD_BLAST_CACHE(pfx, desc, indexop, hitop, lsize) \ +static inline void blast_##pfx##cache##lsize(void) \ +{ \ + unsigned long start = INDEX_BASE; \ + unsigned long end = start + current_cpu_data.desc.waysize; \ + unsigned long ws_inc = 1UL << current_cpu_data.desc.waybit; \ + unsigned long ws_end = current_cpu_data.desc.ways << \ + current_cpu_data.desc.waybit; \ + unsigned long ws, addr; \ + \ + __##pfx##flush_prologue \ + \ + for (ws = 0; ws < ws_end; ws += ws_inc) \ + for (addr = start; addr < end; addr += lsize * 32) \ + cache##lsize##_unroll32(addr|ws, indexop); \ + \ + __##pfx##flush_epilogue \ +} \ + \ +static inline void blast_##pfx##cache##lsize##_page(unsigned long page) \ +{ \ + unsigned long start = page; \ + unsigned long end = page + PAGE_SIZE; \ + \ + __##pfx##flush_prologue \ + \ + do { \ + cache##lsize##_unroll32(start, hitop); \ + start += lsize * 32; \ + } while (start < end); \ + \ + __##pfx##flush_epilogue \ +} \ + \ +static inline void blast_##pfx##cache##lsize##_page_indexed(unsigned long page) \ +{ \ + unsigned long indexmask = current_cpu_data.desc.waysize - 1; \ + unsigned long start = INDEX_BASE + (page & indexmask); \ + unsigned long end = start + PAGE_SIZE; \ + unsigned long ws_inc = 1UL << current_cpu_data.desc.waybit; \ + unsigned long ws_end = current_cpu_data.desc.ways << \ + current_cpu_data.desc.waybit; \ + unsigned long ws, addr; \ + \ + __##pfx##flush_prologue \ + \ + for (ws = 0; ws < ws_end; ws += ws_inc) \ + for (addr = start; addr < end; addr += lsize * 32) \ + cache##lsize##_unroll32(addr|ws, indexop); \ + \ + __##pfx##flush_epilogue \ +} + +__BUILD_BLAST_CACHE(d, dcache, Index_Writeback_Inv_D, Hit_Writeback_Inv_D, 16) +__BUILD_BLAST_CACHE(i, icache, Index_Invalidate_I, Hit_Invalidate_I, 16) +__BUILD_BLAST_CACHE(s, scache, Index_Writeback_Inv_SD, Hit_Writeback_Inv_SD, 16) +__BUILD_BLAST_CACHE(d, dcache, Index_Writeback_Inv_D, Hit_Writeback_Inv_D, 32) +__BUILD_BLAST_CACHE(i, icache, Index_Invalidate_I, Hit_Invalidate_I, 32) +__BUILD_BLAST_CACHE(s, scache, Index_Writeback_Inv_SD, Hit_Writeback_Inv_SD, 32) +__BUILD_BLAST_CACHE(i, icache, Index_Invalidate_I, Hit_Invalidate_I, 64) +__BUILD_BLAST_CACHE(s, scache, Index_Writeback_Inv_SD, Hit_Writeback_Inv_SD, 64) +__BUILD_BLAST_CACHE(s, scache, Index_Writeback_Inv_SD, Hit_Writeback_Inv_SD, 128) + +__BUILD_BLAST_CACHE(inv_d, dcache, Index_Writeback_Inv_D, Hit_Invalidate_D, 16) +__BUILD_BLAST_CACHE(inv_d, dcache, Index_Writeback_Inv_D, Hit_Invalidate_D, 32) +__BUILD_BLAST_CACHE(inv_s, scache, Index_Writeback_Inv_SD, Hit_Invalidate_SD, 16) +__BUILD_BLAST_CACHE(inv_s, scache, Index_Writeback_Inv_SD, Hit_Invalidate_SD, 32) +__BUILD_BLAST_CACHE(inv_s, scache, Index_Writeback_Inv_SD, Hit_Invalidate_SD, 64) +__BUILD_BLAST_CACHE(inv_s, scache, Index_Writeback_Inv_SD, Hit_Invalidate_SD, 128) + +/* build blast_xxx_range, protected_blast_xxx_range */ +#define __BUILD_BLAST_CACHE_RANGE(pfx, desc, hitop, prot) \ +static inline void prot##blast_##pfx##cache##_range(unsigned long start, \ + unsigned long end) \ +{ \ + unsigned long lsize = cpu_##desc##_line_size(); \ + unsigned long addr = start & ~(lsize - 1); \ + unsigned long aend = (end - 1) & ~(lsize - 1); \ + \ + __##pfx##flush_prologue \ + \ + while (1) { \ + prot##cache_op(hitop, addr); \ + if (addr == aend) \ + break; \ + addr += lsize; \ + } \ + \ + __##pfx##flush_epilogue \ +} + +__BUILD_BLAST_CACHE_RANGE(d, dcache, Hit_Writeback_Inv_D, protected_) +__BUILD_BLAST_CACHE_RANGE(s, scache, Hit_Writeback_Inv_SD, protected_) +__BUILD_BLAST_CACHE_RANGE(i, icache, Hit_Invalidate_I, protected_) +__BUILD_BLAST_CACHE_RANGE(d, dcache, Hit_Writeback_Inv_D, ) +__BUILD_BLAST_CACHE_RANGE(s, scache, Hit_Writeback_Inv_SD, ) +/* blast_inv_dcache_range */ +__BUILD_BLAST_CACHE_RANGE(inv_d, dcache, Hit_Invalidate_D, ) +__BUILD_BLAST_CACHE_RANGE(inv_s, scache, Hit_Invalidate_SD, ) + +#endif /* _ASM_R4KCACHE_H */ |
