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From: Andrey Smirnov <andrew.smirnov@gmail.com>
To: barebox@lists.infradead.org
Cc: Andrey Smirnov <andrew.smirnov@gmail.com>
Subject: [PATCH 15/16] i.MX6: PL310: Adjust settings for performance
Date: Tue, 15 Mar 2016 20:33:50 -0700	[thread overview]
Message-ID: <1458099232-9050-15-git-send-email-andrew.smirnov@gmail.com> (raw)
In-Reply-To: <1458099232-9050-1-git-send-email-andrew.smirnov@gmail.com>

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>
---
 arch/arm/mach-imx/imx6.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/arch/arm/mach-imx/imx6.c b/arch/arm/mach-imx/imx6.c
index 0c7338d..ba8fb89 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);
 
-- 
2.5.0


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  parent reply	other threads:[~2016-03-16  3:34 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-03-16  3:33 [PATCH 01/16] i.MX6: dts: Include local .dtsi's last Andrey Smirnov
2016-03-16  3:33 ` [PATCH 02/16] clk-imx6: Call clk_enable on mmdc_ch0_axi_podf Andrey Smirnov
2016-03-16  3:33 ` [PATCH 03/16] fec_imx: Deallocate clocks when probe fails Andrey Smirnov
2016-03-16  3:33 ` [PATCH 04/16] fec_imx: Deallocate I/O resources if " Andrey Smirnov
2016-03-16  3:33 ` [PATCH 05/16] fec_imx: Free phy_reset GPIO if when " Andrey Smirnov
2016-03-16  3:33 ` [PATCH 06/16] fec_imx: Use FEC_ECNTRL_RESET instead of a magic number Andrey Smirnov
2016-03-16  3:33 ` [PATCH 07/16] fec_imx: Impelemnt reset timeout Andrey Smirnov
2016-03-16  5:46   ` Antony Pavlov
2016-03-16  3:33 ` [PATCH 08/16] fec_imx: Deallocate DMA buffers when probe fails Andrey Smirnov
2016-03-16  3:33 ` [PATCH 09/16] fec_imx: Unregister MDIO " Andrey Smirnov
2016-03-16  3:33 ` [PATCH 10/16] i.MX: Add revision detection for i.MX6D/Q Plus Andrey Smirnov
2016-03-16  3:33 ` [PATCH 11/16] ARM: Add errata 845369 workaround Andrey Smirnov
2016-03-16  3:33 ` [PATCH 12/16] i.MX6: Apply " Andrey Smirnov
2016-03-17  7:31   ` Stefan Christ
2016-03-21 16:08     ` Andrey Smirnov
2016-03-29 16:33       ` Trent Piepho
2016-03-16  3:33 ` [PATCH 13/16] L2x0: i.MX6: Replace magic numbers with constants Andrey Smirnov
2016-03-16  3:33 ` [PATCH 14/16] i.MX6: Apply PL310 errata base on PL310's revision Andrey Smirnov
2016-03-16  3:33 ` Andrey Smirnov [this message]
2016-03-16  3:33 ` [PATCH 16/16] common: Add EPROBE_DEFER to strerror Andrey Smirnov
2016-03-17  7:25 ` [PATCH 01/16] i.MX6: dts: Include local .dtsi's last Sascha Hauer

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