From c3330e9d6a11b6ead4a2346001338ce884b5832b Mon Sep 17 00:00:00 2001 From: Heiko Schocher Date: Fri, 17 Sep 2010 13:10:30 +0200 Subject: ARM (ARM926ejs): add data cache support, tested on magnesium and tx25 board Enable "cache" command on tx25 and magnesium board and test performance. Test 1: Loading 127 MB of data from NAND flash into RAM: Instr. Cache off on on Data Cache off off on -------------------------------------------------- magnesium 32,6s 22,5s 30s = x 1,09 tx25 (29MB only) 9,69s 5,05s 8,16s = x 1,19 Test 2: uncompressing a gzipped image from RAM to RAM (size compressed: 6.5 MiB, uncompressed: 35 MiB): Instr. Cache off on on Data Cache off off on -------------------------------------------------- magnesium 4,25s 2,08s 1,72s = x 2,47 tx25 4,82s 2,04s 1,84s = x 2,62 Portions of this work were supported by funding from the CE Linux Forum. Signed-off-by: Alessandro Rubini Signed-off-by: Heiko Schocher Cc: Alessandro Rubini --- arch/arm/lib/cache.c | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'arch/arm/lib/cache.c') diff --git a/arch/arm/lib/cache.c b/arch/arm/lib/cache.c index 61ee9d3b13..b36fd24407 100644 --- a/arch/arm/lib/cache.c +++ b/arch/arm/lib/cache.c @@ -31,6 +31,12 @@ void flush_cache (unsigned long dummy1, unsigned long dummy2) void arm1136_cache_flush(void); arm1136_cache_flush(); +#endif +#ifdef CONFIG_ARM926EJS + /* test and clean, page 2-23 of arm926ejs manual */ + asm("0: mrc p15, 0, r15, c7, c10, 3\n\t" "bne 0b\n" : : : "memory"); + /* disable write buffer as well (page 2-22) */ + asm("mcr p15, 0, %0, c7, c10, 4" : : "r" (0)); #endif return; } -- cgit v1.2.1 From 95c6f6d34d4ff23f4d005488d84682eec5fa9ec8 Mon Sep 17 00:00:00 2001 From: Heiko Schocher Date: Fri, 17 Sep 2010 13:10:31 +0200 Subject: ARM V7 (OMAP): add data cache support, test on Beagle board Add data cache support for ARM V7 systems. Used cache flush functions from linux:arch/arm/mm/cache-v7.S developed from Catalin Marinas. Enable "cache" command on Beagle board and test performance. Test 1: Loading 127 MB of data from NAND flash into RAM: Instr. Cache off on on Data Cache off off on -------------------------------------------------- Beagle (Cortex A8) 116s 106s 30.3s = x 3.8 Test 2: uncompressing a gzipped image from RAM to RAM (size compressed: 6.5 MiB, uncompressed: 35 MiB): Instr. Cache off on on Data Cache off off on -------------------------------------------------- Beagle (Cortex A8) 1.84s 1.64s 0.12s = x 15.3 Portions of this work were supported by funding from the CE Linux Forum. Signed-off-by: Heiko Schocher Reviewed-by: Ben Gardiner --- arch/arm/lib/cache.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'arch/arm/lib/cache.c') diff --git a/arch/arm/lib/cache.c b/arch/arm/lib/cache.c index b36fd24407..3684cad16a 100644 --- a/arch/arm/lib/cache.c +++ b/arch/arm/lib/cache.c @@ -37,6 +37,11 @@ void flush_cache (unsigned long dummy1, unsigned long dummy2) asm("0: mrc p15, 0, r15, c7, c10, 3\n\t" "bne 0b\n" : : : "memory"); /* disable write buffer as well (page 2-22) */ asm("mcr p15, 0, %0, c7, c10, 4" : : "r" (0)); +#endif +#ifdef CONFIG_ARMCORTEXA8 + void v7_flush_cache_all(void); + + v7_flush_cache_all(); #endif return; } -- cgit v1.2.1 From 7e4a9e6dc819b2b3499659ca90e1e9c6d4ca3077 Mon Sep 17 00:00:00 2001 From: Heiko Schocher Date: Fri, 17 Sep 2010 13:10:32 +0200 Subject: ARM (ARM11): add data cache support, test on Qong board Add data cache support for arm1136 systems. Enable "cache" command on Qong board and test performance. Test 1: Loading 127 MB of data from NAND flash into RAM: Instr. Cache off on on Data Cache off off on -------------------------------------------------- QONG (ARM11) 177s 95s 43s = x 4.1 Test 2: uncompressing a gzipped image from RAM to RAM (size compressed: 6.5 MiB, uncompressed: 35 MiB): Instr. Cache off on on Data Cache off off on -------------------------------------------------- QONG (ARM11) 1.54s 0.95s 0.18s = x 8.6 Portions of this work were supported by funding from the CE Linux Forum. Signed-off-by: Heiko Schocher --- arch/arm/lib/cache.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch/arm/lib/cache.c') diff --git a/arch/arm/lib/cache.c b/arch/arm/lib/cache.c index 3684cad16a..55b633ee00 100644 --- a/arch/arm/lib/cache.c +++ b/arch/arm/lib/cache.c @@ -27,7 +27,7 @@ void flush_cache (unsigned long dummy1, unsigned long dummy2) { -#ifdef CONFIG_OMAP2420 +#if defined(CONFIG_OMAP2420) || defined(CONFIG_ARM1136) void arm1136_cache_flush(void); arm1136_cache_flush(); -- cgit v1.2.1