diff options
Diffstat (limited to 'target/linux/generic/backport-6.6/322-v6.11-mips-bmips-enable-RAC-on-BMIPS4350.patch')
| -rw-r--r-- | target/linux/generic/backport-6.6/322-v6.11-mips-bmips-enable-RAC-on-BMIPS4350.patch | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/target/linux/generic/backport-6.6/322-v6.11-mips-bmips-enable-RAC-on-BMIPS4350.patch b/target/linux/generic/backport-6.6/322-v6.11-mips-bmips-enable-RAC-on-BMIPS4350.patch new file mode 100644 index 0000000000..2af45df259 --- /dev/null +++ b/target/linux/generic/backport-6.6/322-v6.11-mips-bmips-enable-RAC-on-BMIPS4350.patch @@ -0,0 +1,57 @@ +From 04f38d1a4db017f17e82442727b91ce03dd72759 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Daniel=20Gonz=C3=A1lez=20Cabanelas?= <dgcbueu@gmail.com> +Date: Thu, 20 Jun 2024 17:26:45 +0200 +Subject: [PATCH 4/4] 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> +[ rework code and reduce code duplication ] +Acked-by: Florian Fainelli <florian.fainelli@broadcom.com> +Signed-off-by: Christian Marangi <ansuelsmth@gmail.com> +Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> +--- + arch/mips/kernel/smp-bmips.c | 18 ++++++++++++++++++ + 1 file changed, 18 insertions(+) + +--- a/arch/mips/kernel/smp-bmips.c ++++ b/arch/mips/kernel/smp-bmips.c +@@ -592,6 +592,7 @@ asmlinkage void __weak plat_wired_tlb_se + void bmips_cpu_setup(void) + { + void __iomem __maybe_unused *cbr = bmips_cbr_addr; ++ u32 __maybe_unused rac_addr; + u32 __maybe_unused cfg; + + switch (current_cpu_type()) { +@@ -620,6 +621,23 @@ void bmips_cpu_setup(void) + __raw_readl(cbr + BMIPS_RAC_ADDRESS_RANGE); + break; + ++ case CPU_BMIPS4350: ++ rac_addr = BMIPS_RAC_CONFIG_1; ++ ++ if (!(read_c0_brcm_cmt_local() & (1 << 31))) ++ rac_addr = BMIPS_RAC_CONFIG; ++ ++ /* Enable data RAC */ ++ cfg = __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 = __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()) { |