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[93.34.90.105]) by smtp.googlemail.com with ESMTPSA id ffacd0b85a97d-362c7c2dffdsm6277480f8f.35.2024.06.20.09.26.01 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 20 Jun 2024 09:26:02 -0700 (PDT) From: Christian Marangi To: Hauke Mehrtens , =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= , Thomas Bogendoerfer , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Florian Fainelli , Broadcom internal kernel review list , Christian Marangi , linux-mips@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Cc: =?UTF-8?q?Daniel=20Gonz=C3=A1lez=20Cabanelas?= , =?UTF-8?q?=C3=81lvaro=20Fern=C3=A1ndez=20Rojas?= Subject: [PATCH v8 4/4] mips: bmips: enable RAC on BMIPS4350 Date: Thu, 20 Jun 2024 17:26:45 +0200 Message-ID: <20240620152649.994-5-ansuelsmth@gmail.com> X-Mailer: git-send-email 2.45.1 In-Reply-To: <20240620152649.994-1-ansuelsmth@gmail.com> References: <20240620152649.994-1-ansuelsmth@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable From: Daniel Gonz=C3=A1lez Cabanelas The data RAC is left disabled by the bootloader in some SoCs, at least in the core it boots from. Enabling this feature increases the performance up to +30% depending on the task. Signed-off-by: Daniel Gonz=C3=A1lez Cabanelas Signed-off-by: =C3=81lvaro Fern=C3=A1ndez Rojas [ rework code and reduce code duplication ] Acked-by: Florian Fainelli Signed-off-by: Christian Marangi --- arch/mips/kernel/smp-bmips.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/arch/mips/kernel/smp-bmips.c b/arch/mips/kernel/smp-bmips.c index a4f84667a901..35b8d810833c 100644 --- a/arch/mips/kernel/smp-bmips.c +++ b/arch/mips/kernel/smp-bmips.c @@ -592,6 +592,7 @@ asmlinkage void __weak plat_wired_tlb_setup(void) void bmips_cpu_setup(void) { void __iomem __maybe_unused *cbr =3D bmips_cbr_addr; + u32 __maybe_unused rac_addr; u32 __maybe_unused cfg; =20 switch (current_cpu_type()) { @@ -620,6 +621,23 @@ void bmips_cpu_setup(void) __raw_readl(cbr + BMIPS_RAC_ADDRESS_RANGE); break; =20 + case CPU_BMIPS4350: + rac_addr =3D BMIPS_RAC_CONFIG_1; + + if (!(read_c0_brcm_cmt_local() & (1 << 31))) + rac_addr =3D BMIPS_RAC_CONFIG; + + /* Enable data RAC */ + cfg =3D __raw_readl(cbr + rac_addr); + __raw_writel(cfg | 0xf, cbr + rac_addr); + __raw_readl(cbr + rac_addr); + + /* Flush stale data out of the readahead cache */ + cfg =3D __raw_readl(cbr + BMIPS_RAC_CONFIG); + __raw_writel(cfg | 0x100, cbr + BMIPS_RAC_CONFIG); + __raw_readl(cbr + BMIPS_RAC_CONFIG); + break; + case CPU_BMIPS4380: /* CBG workaround for early BMIPS4380 CPUs */ switch (read_c0_prid()) { --=20 2.45.1