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MIPS: refactor cache loops to a macro
Reduce duplication by performing loops through cache tags using an assembler macro. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
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1 changed files with 13 additions and 17 deletions
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@ -47,28 +47,28 @@
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#endif
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.endm
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.macro cache_loop curr, end, line_sz, op
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10: cache \op, 0(\curr)
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PTR_ADDU \curr, \curr, \line_sz
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bne \curr, \end, 10b
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.endm
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/*
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* mips_init_icache(uint PRId, ulong icache_size, unchar icache_linesz)
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*/
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LEAF(mips_init_icache)
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blez a1, 9f
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mtc0 zero, CP0_TAGLO
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/* clear tag to invalidate */
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PTR_LI t0, INDEX_BASE
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PTR_ADDU t1, t0, a1
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1: cache INDEX_STORE_TAG_I, 0(t0)
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PTR_ADDU t0, a2
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bne t0, t1, 1b
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/* clear tag to invalidate */
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cache_loop t0, t1, a2, INDEX_STORE_TAG_I
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/* fill once, so data field parity is correct */
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PTR_LI t0, INDEX_BASE
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2: cache FILL, 0(t0)
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PTR_ADDU t0, a2
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bne t0, t1, 2b
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cache_loop t0, t1, a2, FILL
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/* invalidate again - prudent but not strictly neccessary */
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PTR_LI t0, INDEX_BASE
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1: cache INDEX_STORE_TAG_I, 0(t0)
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PTR_ADDU t0, a2
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bne t0, t1, 1b
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cache_loop t0, t1, a2, INDEX_STORE_TAG_I
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9: jr ra
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END(mips_init_icache)
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@ -78,12 +78,10 @@ LEAF(mips_init_icache)
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LEAF(mips_init_dcache)
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blez a1, 9f
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mtc0 zero, CP0_TAGLO
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/* clear all tags */
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PTR_LI t0, INDEX_BASE
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PTR_ADDU t1, t0, a1
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1: cache INDEX_STORE_TAG_D, 0(t0)
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PTR_ADDU t0, a2
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bne t0, t1, 1b
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/* clear all tags */
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cache_loop t0, t1, a2, INDEX_STORE_TAG_D
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/* load from each line (in cached space) */
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PTR_LI t0, INDEX_BASE
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2: LONG_L zero, 0(t0)
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@ -91,9 +89,7 @@ LEAF(mips_init_dcache)
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bne t0, t1, 2b
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/* clear all tags */
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PTR_LI t0, INDEX_BASE
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1: cache INDEX_STORE_TAG_D, 0(t0)
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PTR_ADDU t0, a2
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bne t0, t1, 1b
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cache_loop t0, t1, a2, INDEX_STORE_TAG_D
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9: jr ra
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END(mips_init_dcache)
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