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Sun, 21 Jun 2020 13:10:34 +0000 From: Sagar Shrikant Kadam To: u-boot@lists.denx.de Cc: rick@andestech.com, lukma@denx.de, bmeng.cn@gmail.com, jagan@amarulasolutions.com, pragnesh.patel@sifive.com, anup.patel@wdc.com, sjg@chromium.org, seanga2@gmail.com, Sagar Shrikant Kadam Subject: [PATCH v4 4/4] riscv: cpu: check and append L1 cache to cpu features Date: Sun, 21 Jun 2020 06:10:08 -0700 Message-Id: <1592745008-17196-5-git-send-email-sagar.kadam@sifive.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1592745008-17196-1-git-send-email-sagar.kadam@sifive.com> References: <1592745008-17196-1-git-send-email-sagar.kadam@sifive.com> X-ClientProxiedBy: BYAPR21CA0001.namprd21.prod.outlook.com (2603:10b6:a03:114::11) To BN8PR13MB2611.namprd13.prod.outlook.com (2603:10b6:408:81::17) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from gamma07.internal.sifive.com (64.62.193.194) by BYAPR21CA0001.namprd21.prod.outlook.com (2603:10b6:a03:114::11) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256) id 15.20.3153.2 via Frontend Transport; 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Set the L1 cache feature bit using the i-cache-size as one of the property from device tree indicating that L1 cache is present on the cpu core. => cpu detail 0: cpu@0 rv64imac ID = 0, freq = 999.100 MHz: L1 cache 1: cpu@1 rv64imafdc ID = 1, freq = 999.100 MHz: L1 cache, MMU 2: cpu@2 rv64imafdc ID = 2, freq = 999.100 MHz: L1 cache, MMU 3: cpu@3 rv64imafdc ID = 3, freq = 999.100 MHz: L1 cache, MMU 4: cpu@4 rv64imafdc ID = 4, freq = 999.100 MHz: L1 cache, MMU Signed-off-by: Sagar Shrikant Kadam Reviewed-by: Pragnesh Patel --- drivers/cpu/riscv_cpu.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/cpu/riscv_cpu.c b/drivers/cpu/riscv_cpu.c index 8c4b5e7..ce722cb 100644 --- a/drivers/cpu/riscv_cpu.c +++ b/drivers/cpu/riscv_cpu.c @@ -35,6 +35,7 @@ static int riscv_cpu_get_info(struct udevice *dev, struct cpu_info *info) int ret; struct clk clk; const char *mmu; + u32 split_cache_size; /* Zero out the frequency, in case sizeof(ulong) != sizeof(u32) */ info->cpu_freq = 0; @@ -57,6 +58,11 @@ static int riscv_cpu_get_info(struct udevice *dev, struct cpu_info *info) if (mmu) info->features |= BIT(CPU_FEAT_MMU); + /* check if I/D cache is present */ + ret = dev_read_u32(dev, "i-cache-size", &split_cache_size); + if (!ret) + info->features |= BIT(CPU_FEAT_L1_CACHE); + return 0; }