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Date: Wed, 10 Feb 2021 17:16:14 +0100
From: Thomas Bogendoerfer <tsbogend@...ha.franken.de>
To: linux-mips@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 2/2] MIPS: Simplify EVA cache handling
protected_cache_op is only used for flushing user addresses, so
we only need to define protected_cache_op different in EVA mode and
be done with it.
Signed-off-by: Thomas Bogendoerfer <tsbogend@...ha.franken.de>
---
arch/mips/include/asm/r4kcache.h | 67 ++++++--------------------------
1 file changed, 11 insertions(+), 56 deletions(-)
diff --git a/arch/mips/include/asm/r4kcache.h b/arch/mips/include/asm/r4kcache.h
index 15ab16f99f28..af3788589ee6 100644
--- a/arch/mips/include/asm/r4kcache.h
+++ b/arch/mips/include/asm/r4kcache.h
@@ -23,7 +23,6 @@
#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);
@@ -102,14 +101,17 @@ static inline void flush_scache_line(unsigned long addr)
cache_op(Hit_Writeback_Inv_SD, addr);
}
-#define protected_cache_op(op,addr) \
+#ifdef CONFIG_EVA
+
+#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" \
+ " .set mips0 \n" \
+ " .set eva \n" \
+ "1: cachee %1, (%2) \n" \
"2: .insn \n" \
" .set pop \n" \
" .section .fixup,\"ax\" \n" \
@@ -123,17 +125,16 @@ static inline void flush_scache_line(unsigned long addr)
: "i" (op), "r" (addr), "i" (-EFAULT)); \
__err; \
})
+#else
-
-#define protected_cachee_op(op,addr) \
+#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" \
+ " .set "MIPS_ISA_ARCH_LEVEL" \n" \
+ "1: cache %1, (%2) \n" \
"2: .insn \n" \
" .set pop \n" \
" .section .fixup,\"ax\" \n" \
@@ -147,6 +148,7 @@ static inline void flush_scache_line(unsigned long addr)
: "i" (op), "r" (addr), "i" (-EFAULT)); \
__err; \
})
+#endif
/*
* The next two are for badland addresses like signal trampolines.
@@ -158,11 +160,7 @@ static inline int protected_flush_icache_line(unsigned long addr)
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
}
}
@@ -174,20 +172,12 @@ static inline int protected_flush_icache_line(unsigned long addr)
*/
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
}
/*
@@ -307,43 +297,8 @@ static inline void prot##extra##blast_##pfx##cache##_range(unsigned long start,
} \
}
-#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_)
--
2.29.2
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