diff options
| author | Paul Burton | 2015-01-29 01:28:00 +0000 |
|---|---|---|
| committer | Daniel Schwierzeck | 2015-01-29 12:55:01 +0100 |
| commit | ac22feca1135b81ecc4d38995e98b59943d1bbf5 (patch) | |
| tree | 7b67a41bfa5488cfb2b9e3235242b349004c8266 /arch | |
| parent | 536cb7ce1aca10c326ac864b3e1d05ab57b3ec7e (diff) | |
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>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/mips/lib/cache_init.S | 30 |
1 files changed, 13 insertions, 17 deletions
diff --git a/arch/mips/lib/cache_init.S b/arch/mips/lib/cache_init.S index 2e036d9b979..dc207a6a1ce 100644 --- a/arch/mips/lib/cache_init.S +++ b/arch/mips/lib/cache_init.S @@ -47,28 +47,28 @@ #endif .endm + .macro cache_loop curr, end, line_sz, op +10: cache \op, 0(\curr) + PTR_ADDU \curr, \curr, \line_sz + bne \curr, \end, 10b + .endm + /* * mips_init_icache(uint PRId, ulong icache_size, unchar icache_linesz) */ LEAF(mips_init_icache) blez a1, 9f mtc0 zero, CP0_TAGLO - /* clear tag to invalidate */ PTR_LI t0, INDEX_BASE PTR_ADDU t1, t0, a1 -1: cache INDEX_STORE_TAG_I, 0(t0) - PTR_ADDU t0, a2 - bne t0, t1, 1b + /* clear tag to invalidate */ + cache_loop t0, t1, a2, INDEX_STORE_TAG_I /* fill once, so data field parity is correct */ PTR_LI t0, INDEX_BASE -2: cache FILL, 0(t0) - PTR_ADDU t0, a2 - bne t0, t1, 2b + cache_loop t0, t1, a2, FILL /* invalidate again - prudent but not strictly neccessary */ PTR_LI t0, INDEX_BASE -1: cache INDEX_STORE_TAG_I, 0(t0) - PTR_ADDU t0, a2 - bne t0, t1, 1b + cache_loop t0, t1, a2, INDEX_STORE_TAG_I 9: jr ra END(mips_init_icache) @@ -78,12 +78,10 @@ LEAF(mips_init_icache) LEAF(mips_init_dcache) blez a1, 9f mtc0 zero, CP0_TAGLO - /* clear all tags */ PTR_LI t0, INDEX_BASE PTR_ADDU t1, t0, a1 -1: cache INDEX_STORE_TAG_D, 0(t0) - PTR_ADDU t0, a2 - bne t0, t1, 1b + /* clear all tags */ + cache_loop t0, t1, a2, INDEX_STORE_TAG_D /* load from each line (in cached space) */ PTR_LI t0, INDEX_BASE 2: LONG_L zero, 0(t0) @@ -91,9 +89,7 @@ LEAF(mips_init_dcache) bne t0, t1, 2b /* clear all tags */ PTR_LI t0, INDEX_BASE -1: cache INDEX_STORE_TAG_D, 0(t0) - PTR_ADDU t0, a2 - bne t0, t1, 1b + cache_loop t0, t1, a2, INDEX_STORE_TAG_D 9: jr ra END(mips_init_dcache) |