From mboxrd@z Thu Jan 1 00:00:00 1970 From: Nishanth Menon Date: Wed, 25 Feb 2015 14:55:17 -0600 Subject: [U-Boot] [PATCH V3 09/11] ARM: OMAP5 / DRA7: Setup L2 Aux Control Register with recommended configuration In-Reply-To: <1424897719-12666-1-git-send-email-nm@ti.com> References: <1424897719-12666-1-git-send-email-nm@ti.com> Message-ID: <1424897719-12666-10-git-send-email-nm@ti.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de Update to existing recommendation for L2ACTLR configuration to prevent system instability and optimize performance. These apply to both OMAP5 and DRA7. Reported-by: Vivek Chengalvala Signed-off-by: Nishanth Menon --- arch/arm/cpu/armv7/omap5/hwinit.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/arch/arm/cpu/armv7/omap5/hwinit.c b/arch/arm/cpu/armv7/omap5/hwinit.c index f8060555b680..8d6b59eeb044 100644 --- a/arch/arm/cpu/armv7/omap5/hwinit.c +++ b/arch/arm/cpu/armv7/omap5/hwinit.c @@ -304,6 +304,21 @@ void config_data_eye_leveling_samples(u32 emif_base) (*ctrl)->control_emif2_sdram_config_ext); } +void init_cpu_configuration(void) +{ + u32 l2actlr; + + asm volatile("mrc p15, 1, %0, c15, c0, 0" : "=r"(l2actlr)); + /* + * L2ACTLR: Ensure to enable the following: + * 3: Disable clean/evict push to external + * 4: Disable WriteUnique and WriteLineUnique transactions from master + * 8: Disable DVM/CMO message broadcast + */ + l2actlr |= 0x118; + omap_smc1(OMAP5_SERVICE_L2ACTLR_SET, l2actlr); +} + void init_omap_revision(void) { /* @@ -342,6 +357,7 @@ void init_omap_revision(void) default: *omap_si_rev = OMAP5430_SILICON_ID_INVALID; } + init_cpu_configuration(); } void reset_cpu(ulong ignored) -- 1.7.9.5