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linux-headers-5.15.0-181
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include
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asm
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/usr/src/linux-headers-5.15.0-181/arch/mips/include/asm
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Edit:
/usr/src/linux-headers-5.15.0-181/arch/mips/include/asm/r4kcache.h
(11373B)
/* * 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> 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); } #ifdef CONFIG_EVA #define protected_cache_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_WD)" 1b, 3b \n" \ " .previous" \ : "+r" (__err) \ : "i" (op), "r" (addr), "i" (-EFAULT)); \ __err; \ }) #else #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_WD)" 1b, 3b \n" \ " .previous" \ : "+r" (__err) \ : "i" (op), "r" (addr), "i" (-EFAULT)); \ __err; \ }) #endif /* * 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: return 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 int protected_writeback_dcache_line(unsigned long addr) { return protected_cache_op(Hit_Writeback_Inv_D, addr); } static inline int protected_writeback_scache_line(unsigned long addr) { return 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 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; \ } \ } __BUILD_BLAST_CACHE_RANGE(d, dcache, Hit_Writeback_Inv_D, protected_, ) __BUILD_BLAST_CACHE_RANGE(i, icache, Hit_Invalidate_I, protected_, ) __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 */
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