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| author | Andrey Smirnov <andrew.smirnov@gmail.com> | 2016-03-15 20:33:50 -0700 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2016-03-17 08:23:05 +0100 |
| commit | ce20b192f13d4f9ec051b2a84d9984542adf04dc (patch) | |
| tree | efe00260352951001c5fd04aac123eef8d0fac21 | |
| parent | 5127d8013793828f9e50e1124e85b661fe19eee0 (diff) | |
| download | barebox-ce20b192f13d4f9ec051b2a84d9984542adf04dc.tar.gz barebox-ce20b192f13d4f9ec051b2a84d9984542adf04dc.tar.xz | |
i.MX6: PL310: Adjust settings for performance
According to commit f6b6f3c7b2bb7d6277801882afdced6f2b10fc17 from
git://git.freescale.com/imx/uboot-imx.git:
Also set Prefetch offset to 15, since it improves
memcpy performance by 35%. Don't enable Incr double
Linefill enable since it adversely affects memcpy
performance by about 32MB/s and reads by 90MB/s. Tested
with 4K to 16MB sized src and dst aligned buffer.
This commit ports those chagnes from U-Boot.
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
| -rw-r--r-- | arch/arm/mach-imx/imx6.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/arch/arm/mach-imx/imx6.c b/arch/arm/mach-imx/imx6.c index 0c7338d0b5..ba8fb8964a 100644 --- a/arch/arm/mach-imx/imx6.c +++ b/arch/arm/mach-imx/imx6.c @@ -223,8 +223,11 @@ static int imx6_mmu_init(void) val = readl(l2x0_base + L2X0_PREFETCH_CTRL); val |= L2X0_DOUBLE_LINEFILL_EN | L2X0_INSTRUCTION_PREFETCH_EN | - L2X0_DATA_PREFETCH_EN | - L2X0_INCR_DOUBLE_LINEFILL_EN; + L2X0_DATA_PREFETCH_EN; + /* + * set prefetch offset to 15 + */ + val |= 15; /* * The L2 cache controller(PL310) version on the i.MX6D/Q is r3p1-50rel0 * The L2 cache controller(PL310) version on the i.MX6DL/SOLO/SL is r3p2 @@ -236,8 +239,7 @@ static int imx6_mmu_init(void) */ if (cache_part == L2X0_CACHE_ID_PART_L310 && cache_rtl < L2X0_CACHE_ID_RTL_R3P2) - val &= ~(L2X0_DOUBLE_LINEFILL_EN | - L2X0_INCR_DOUBLE_LINEFILL_EN); + val &= ~L2X0_DOUBLE_LINEFILL_EN; writel(val, l2x0_base + L2X0_PREFETCH_CTRL); |