diff options
| -rw-r--r-- | target/linux/bmips/patches-5.15/204-mips-bmips-enable-RAC-on-BMIPS4350.patch | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/target/linux/bmips/patches-5.15/204-mips-bmips-enable-RAC-on-BMIPS4350.patch b/target/linux/bmips/patches-5.15/204-mips-bmips-enable-RAC-on-BMIPS4350.patch new file mode 100644 index 0000000000..26bd03e329 --- /dev/null +++ b/target/linux/bmips/patches-5.15/204-mips-bmips-enable-RAC-on-BMIPS4350.patch @@ -0,0 +1,42 @@ +From 7f862eaedac56b67972393f0a9affcd2fe53479b Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Daniel=20Gonz=C3=A1lez=20Cabanelas?= <dgcbueu@gmail.com> +Date: Sun, 18 Jun 2023 19:59:25 +0200 +Subject: [PATCH] mips: bmips: enable RAC on BMIPS4350 +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +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 González Cabanelas <dgcbueu@gmail.com> +Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com> +--- + arch/mips/kernel/smp-bmips.c | 14 ++++++++++++++ + 1 file changed, 14 insertions(+) + +--- a/arch/mips/kernel/smp-bmips.c ++++ b/arch/mips/kernel/smp-bmips.c +@@ -614,6 +614,20 @@ void bmips_cpu_setup(void) + __raw_readl(cbr + BMIPS_RAC_ADDRESS_RANGE); + break; + ++ case CPU_BMIPS4350: ++ /* Enable data RAC */ ++ if (!(read_c0_brcm_cmt_local() & (1 << 31))) { ++ cfg = __raw_readl(cbr + BMIPS_RAC_CONFIG); ++ __raw_writel(cfg | 0xa, cbr + BMIPS_RAC_CONFIG); ++ __raw_readl(cbr + BMIPS_RAC_CONFIG); ++ } else { ++ cbr = (void __iomem *)0xff400000; ++ cfg = __raw_readl(cbr + BMIPS_RAC_CONFIG_1); ++ __raw_writel(cfg | 0xa, cbr + BMIPS_RAC_CONFIG_1); ++ __raw_readl(cbr + BMIPS_RAC_CONFIG_1); ++ } ++ break; ++ + case CPU_BMIPS4380: + /* CBG workaround for early BMIPS4380 CPUs */ + switch (read_c0_prid()) { |