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Diffstat (limited to 'arch/mips/include/asm/r4kcache.h')
| -rw-r--r-- | arch/mips/include/asm/r4kcache.h | 379 |
1 files changed, 379 insertions, 0 deletions
diff --git a/arch/mips/include/asm/r4kcache.h b/arch/mips/include/asm/r4kcache.h new file mode 100644 index 000000000..15ab16f99 --- /dev/null +++ b/arch/mips/include/asm/r4kcache.h @@ -0,0 +1,379 @@ +/* + * 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 (davem@davemloft.net) + * 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 <linux/stringify.h> + +#include <asm/asm.h> +#include <asm/asm-eva.h> +#include <asm/cacheops.h> +#include <asm/compiler.h> +#include <asm/cpu-features.h> +#include <asm/cpu-type.h> +#include <asm/mipsmtregs.h> +#include <asm/mmzone.h> +#include <asm/unroll.h> +#include <linux/uaccess.h> /* for uaccess_kernel() */ + +extern void (*r4k_blast_dcache)(void); +extern void (*r4k_blast_icache)(void); + +/* + * 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(insn, op, addr) \ + __asm__ __volatile__( \ + " .set push \n" \ + " .set noreorder \n" \ + " .set "MIPS_ISA_ARCH_LEVEL" \n" \ + " " insn("%0", "%1") " \n" \ + " .set pop \n" \ + : \ + : "i" (op), "R" (*(unsigned char *)(addr))) + +#define cache_op(op, addr) \ + _cache_op(kernel_cache, op, addr) + +static inline void flush_icache_line_indexed(unsigned long addr) +{ + cache_op(Index_Invalidate_I, addr); +} + +static inline void flush_dcache_line_indexed(unsigned long addr) +{ + cache_op(Index_Writeback_Inv_D, addr); +} + +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) +{ + switch (boot_cpu_type()) { + case CPU_LOONGSON2EF: + cache_op(Hit_Invalidate_I_Loongson2, addr); + break; + + default: + cache_op(Hit_Invalidate_I, addr); + break; + } +} + +static inline void flush_dcache_line(unsigned long addr) +{ + cache_op(Hit_Writeback_Inv_D, addr); +} + +static inline void invalidate_dcache_line(unsigned long addr) +{ + cache_op(Hit_Invalidate_D, addr); +} + +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) \ +({ \ + int __err = 0; \ + __asm__ __volatile__( \ + " .set push \n" \ + " .set noreorder \n" \ + " .set "MIPS_ISA_ARCH_LEVEL" \n" \ + "1: cache %1, (%2) \n" \ + "2: .insn \n" \ + " .set pop \n" \ + " .section .fixup,\"ax\" \n" \ + "3: li %0, %3 \n" \ + " j 2b \n" \ + " .previous \n" \ + " .section __ex_table,\"a\" \n" \ + " "STR(PTR)" 1b, 3b \n" \ + " .previous" \ + : "+r" (__err) \ + : "i" (op), "r" (addr), "i" (-EFAULT)); \ + __err; \ +}) + + +#define protected_cachee_op(op,addr) \ +({ \ + int __err = 0; \ + __asm__ __volatile__( \ + " .set push \n" \ + " .set noreorder \n" \ + " .set mips0 \n" \ + " .set eva \n" \ + "1: cachee %1, (%2) \n" \ + "2: .insn \n" \ + " .set pop \n" \ + " .section .fixup,\"ax\" \n" \ + "3: li %0, %3 \n" \ + " j 2b \n" \ + " .previous \n" \ + " .section __ex_table,\"a\" \n" \ + " "STR(PTR)" 1b, 3b \n" \ + " .previous" \ + : "+r" (__err) \ + : "i" (op), "r" (addr), "i" (-EFAULT)); \ + __err; \ +}) + +/* + * The next two are for badland addresses like signal trampolines. + */ +static inline int protected_flush_icache_line(unsigned long addr) +{ + switch (boot_cpu_type()) { + case CPU_LOONGSON2EF: + return protected_cache_op(Hit_Invalidate_I_Loongson2, addr); + + default: +#ifdef CONFIG_EVA + return protected_cachee_op(Hit_Invalidate_I, addr); +#else + return protected_cache_op(Hit_Invalidate_I, addr); +#endif + } +} + +/* + * 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 int protected_writeback_dcache_line(unsigned long addr) +{ +#ifdef CONFIG_EVA + return protected_cachee_op(Hit_Writeback_Inv_D, addr); +#else + return protected_cache_op(Hit_Writeback_Inv_D, addr); +#endif +} + +static inline int protected_writeback_scache_line(unsigned long addr) +{ +#ifdef CONFIG_EVA + return protected_cachee_op(Hit_Writeback_Inv_SD, addr); +#else + return protected_cache_op(Hit_Writeback_Inv_SD, addr); +#endif +} + +/* + * This one is RM7000-specific + */ +static inline void invalidate_tcache_page(unsigned long addr) +{ + cache_op(Page_Invalidate_T, addr); +} + +#define cache_unroll(times, insn, op, addr, lsize) do { \ + int i = 0; \ + unroll(times, _cache_op, insn, op, (addr) + (i++ * (lsize))); \ +} while (0) + +/* build blast_xxx, blast_xxx_page, blast_xxx_page_indexed */ +#define __BUILD_BLAST_CACHE(pfx, desc, indexop, hitop, lsize, extra) \ +static inline void extra##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; \ + \ + for (ws = 0; ws < ws_end; ws += ws_inc) \ + for (addr = start; addr < end; addr += lsize * 32) \ + cache_unroll(32, kernel_cache, indexop, \ + addr | ws, lsize); \ +} \ + \ +static inline void extra##blast_##pfx##cache##lsize##_page(unsigned long page) \ +{ \ + unsigned long start = page; \ + unsigned long end = page + PAGE_SIZE; \ + \ + do { \ + cache_unroll(32, kernel_cache, hitop, start, lsize); \ + start += lsize * 32; \ + } while (start < end); \ +} \ + \ +static inline void extra##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; \ + \ + for (ws = 0; ws < ws_end; ws += ws_inc) \ + for (addr = start; addr < end; addr += lsize * 32) \ + cache_unroll(32, kernel_cache, indexop, \ + addr | ws, lsize); \ +} + +__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(i, icache, Index_Invalidate_I, Hit_Invalidate_I_Loongson2, 32, loongson2_) +__BUILD_BLAST_CACHE(s, scache, Index_Writeback_Inv_SD, Hit_Writeback_Inv_SD, 32, ) +__BUILD_BLAST_CACHE(d, dcache, Index_Writeback_Inv_D, Hit_Writeback_Inv_D, 64, ) +__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(d, dcache, Index_Writeback_Inv_D, Hit_Writeback_Inv_D, 128, ) +__BUILD_BLAST_CACHE(i, icache, Index_Invalidate_I, Hit_Invalidate_I, 128, ) +__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, ) + +#define __BUILD_BLAST_USER_CACHE(pfx, desc, indexop, hitop, lsize) \ +static inline void blast_##pfx##cache##lsize##_user_page(unsigned long page) \ +{ \ + unsigned long start = page; \ + unsigned long end = page + PAGE_SIZE; \ + \ + do { \ + cache_unroll(32, user_cache, hitop, start, lsize); \ + start += lsize * 32; \ + } while (start < end); \ +} + +__BUILD_BLAST_USER_CACHE(d, dcache, Index_Writeback_Inv_D, Hit_Writeback_Inv_D, + 16) +__BUILD_BLAST_USER_CACHE(i, icache, Index_Invalidate_I, Hit_Invalidate_I, 16) +__BUILD_BLAST_USER_CACHE(d, dcache, Index_Writeback_Inv_D, Hit_Writeback_Inv_D, + 32) +__BUILD_BLAST_USER_CACHE(i, icache, Index_Invalidate_I, Hit_Invalidate_I, 32) +__BUILD_BLAST_USER_CACHE(d, dcache, Index_Writeback_Inv_D, Hit_Writeback_Inv_D, + 64) +__BUILD_BLAST_USER_CACHE(i, icache, Index_Invalidate_I, Hit_Invalidate_I, 64) + +/* build blast_xxx_range, protected_blast_xxx_range */ +#define __BUILD_BLAST_CACHE_RANGE(pfx, desc, hitop, prot, extra) \ +static inline void prot##extra##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); \ + \ + while (1) { \ + prot##cache_op(hitop, addr); \ + if (addr == aend) \ + break; \ + addr += lsize; \ + } \ +} + +#ifndef CONFIG_EVA + +__BUILD_BLAST_CACHE_RANGE(d, dcache, Hit_Writeback_Inv_D, protected_, ) +__BUILD_BLAST_CACHE_RANGE(i, icache, Hit_Invalidate_I, protected_, ) + +#else + +#define __BUILD_PROT_BLAST_CACHE_RANGE(pfx, desc, hitop) \ +static inline void protected_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); \ + \ + if (!uaccess_kernel()) { \ + while (1) { \ + protected_cachee_op(hitop, addr); \ + if (addr == aend) \ + break; \ + addr += lsize; \ + } \ + } else { \ + while (1) { \ + protected_cache_op(hitop, addr); \ + if (addr == aend) \ + break; \ + addr += lsize; \ + } \ + \ + } \ +} + +__BUILD_PROT_BLAST_CACHE_RANGE(d, dcache, Hit_Writeback_Inv_D) +__BUILD_PROT_BLAST_CACHE_RANGE(i, icache, Hit_Invalidate_I) + +#endif +__BUILD_BLAST_CACHE_RANGE(s, scache, Hit_Writeback_Inv_SD, protected_, ) +__BUILD_BLAST_CACHE_RANGE(i, icache, Hit_Invalidate_I_Loongson2, \ + protected_, loongson2_) +__BUILD_BLAST_CACHE_RANGE(d, dcache, Hit_Writeback_Inv_D, , ) +__BUILD_BLAST_CACHE_RANGE(i, icache, Hit_Invalidate_I, , ) +__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, , ) + +/* Currently, this is very specific to Loongson-3 */ +#define __BUILD_BLAST_CACHE_NODE(pfx, desc, indexop, hitop, lsize) \ +static inline void blast_##pfx##cache##lsize##_node(long node) \ +{ \ + unsigned long start = CAC_BASE | nid_to_addrbase(node); \ + 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; \ + \ + for (ws = 0; ws < ws_end; ws += ws_inc) \ + for (addr = start; addr < end; addr += lsize * 32) \ + cache_unroll(32, kernel_cache, indexop, \ + addr | ws, lsize); \ +} + +__BUILD_BLAST_CACHE_NODE(s, scache, Index_Writeback_Inv_SD, Hit_Writeback_Inv_SD, 16) +__BUILD_BLAST_CACHE_NODE(s, scache, Index_Writeback_Inv_SD, Hit_Writeback_Inv_SD, 32) +__BUILD_BLAST_CACHE_NODE(s, scache, Index_Writeback_Inv_SD, Hit_Writeback_Inv_SD, 64) +__BUILD_BLAST_CACHE_NODE(s, scache, Index_Writeback_Inv_SD, Hit_Writeback_Inv_SD, 128) + +#endif /* _ASM_R4KCACHE_H */ |