Merge https://gitlab.denx.de/u-boot/custodians/u-boot-riscv

- Skip unavailable hart in the get_count().
- fu540 set serial env from otp.
- fu540 add mmc0 as a boot target device.
- Update fix_rela_dyn and add absolute reloc addend.
- Andestech PLIC driver will skip unavailable hart.
- Support Andestech V5L2 cache driver.

arch/riscv/cpu/ax25/Kconfig

@@ -6,6 +6,7 @@ config RISCV_NDS
 	imply RISCV_TIMER
 	imply ANDES_PLIC if (RISCV_MMODE || SPL_RISCV_MMODE)
 	imply ANDES_PLMT if (RISCV_MMODE || SPL_RISCV_MMODE)
+	imply V5L2_CACHE
 	help
 	  Run U-Boot on AndeStar V5 platforms and use some specific features
 	  which are provided by Andes Technology AndeStar V5 families.

arch/riscv/cpu/ax25/cache.c

@@ -5,17 +5,24 @@
  */
 
 #include <common.h>
+#include <dm.h>
+#include <dm/uclass-internal.h>
+#include <cache.h>
+#include <asm/csr.h>
+
+#ifdef CONFIG_RISCV_NDS_CACHE
+/* mcctlcommand */
+#define CCTL_REG_MCCTLCOMMAND_NUM	0x7cc
+
+/* D-cache operation */
+#define CCTL_L1D_WBINVAL_ALL	6
+#endif
 
 void flush_dcache_all(void)
 {
-	/*
-	 * Andes' AX25 does not have a coherence agent. U-Boot must use data
-	 * cache flush and invalidate functions to keep data in the system
-	 * coherent.
-	 * The implementation of the fence instruction in the AX25 flushes the
-	 * data cache and is used for this purpose.
-	 */
-	asm volatile ("fence" ::: "memory");
+#ifdef CONFIG_RISCV_NDS_CACHE
+	csr_write(CCTL_REG_MCCTLCOMMAND_NUM, CCTL_L1D_WBINVAL_ALL);
+#endif
 }
 
 void flush_dcache_range(unsigned long start, unsigned long end)
@@ -59,11 +66,18 @@ void dcache_enable(void)
 {
 #if !CONFIG_IS_ENABLED(SYS_DCACHE_OFF)
 #ifdef CONFIG_RISCV_NDS_CACHE
+	struct udevice *dev = NULL;
+
 	asm volatile (
 		"csrr t1, mcache_ctl\n\t"
 		"ori t0, t1, 0x2\n\t"
 		"csrw mcache_ctl, t0\n\t"
 	);
+
+	uclass_find_first_device(UCLASS_CACHE, &dev);
+
+	if (dev)
+		cache_enable(dev);
 #endif
 #endif
 }
@@ -72,12 +86,19 @@ void dcache_disable(void)
 {
 #if !CONFIG_IS_ENABLED(SYS_DCACHE_OFF)
 #ifdef CONFIG_RISCV_NDS_CACHE
+	struct udevice *dev = NULL;
+
+	csr_write(CCTL_REG_MCCTLCOMMAND_NUM, CCTL_L1D_WBINVAL_ALL);
 	asm volatile (
-		"fence\n\t"
 		"csrr t1, mcache_ctl\n\t"
 		"andi t0, t1, ~0x2\n\t"
 		"csrw mcache_ctl, t0\n\t"
 	);
+
+	uclass_find_first_device(UCLASS_CACHE, &dev);
+
+	if (dev)
+		cache_disable(dev);
 #endif
 #endif
 }

arch/riscv/cpu/start.S

@@ -269,7 +269,7 @@ fix_rela_dyn:
 /*
  * skip first reserved entry: address, type, addend
  */
-	bne	t1, t2, 7f
+	j	10f
 
 6:
 	LREG	t5, -(REGBYTES*2)(t1)	/* t5 <-- relocation info:type */
@@ -280,9 +280,7 @@ fix_rela_dyn:
 	add	t5, t5, t6		/* t5 <-- location to fix up in RAM */
 	add	t3, t3, t6		/* t3 <-- location to fix up in RAM */
 	SREG	t5, 0(t3)
-7:
-	addi	t1, t1, (REGBYTES*3)
-	ble	t1, t2, 6b
+	j	10f
 
 8:
 	la	t4, __dyn_sym_start
@@ -299,13 +297,15 @@ fix_rela_dyn:
 	li	t5, SYM_SIZE
 	mul	t0, t0, t5
 	add	s5, t4, t0
+	LREG	t0, -(REGBYTES)(t1)	/* t0 <-- addend */
 	LREG	t5, REGBYTES(s5)
+	add	t5, t5, t0
 	add	t5, t5, t6		/* t5 <-- location to fix up in RAM */
 	add	t3, t3, t6		/* t3 <-- location to fix up in RAM */
 	SREG	t5, 0(t3)
 10:
 	addi	t1, t1, (REGBYTES*3)
-	ble	t1, t2, 9b
+	ble	t1, t2, 6b
 
 /*
  * trap update

arch/riscv/dts/ae350_32.dts

@@ -62,13 +62,18 @@
 				compatible = "riscv,cpu-intc";
 			};
 		};
+	};
 
-		L2: l2-cache@e0500000 {
-			compatible = "cache";
-			cache-level = <2>;
-			cache-size = <0x40000>;
-			reg = <0x0 0xe0500000 0x0 0x40000>;
-		};
+	L2: l2-cache@e0500000 {
+		compatible = "v5l2cache";
+		cache-level = <2>;
+		cache-size = <0x40000>;
+		reg = <0xe0500000 0x40000>;
+		andes,inst-prefetch = <3>;
+		andes,data-prefetch = <3>;
+		/* The value format is <XRAMOCTL XRAMICTL> */
+		andes,tag-ram-ctl = <0 0>;
+		andes,data-ram-ctl = <0 0>;
 	};
 
 	memory@0 {

arch/riscv/dts/ae350_64.dts

@@ -62,13 +62,18 @@
 				compatible = "riscv,cpu-intc";
 			};
 		};
+	};
 
-		L2: l2-cache@e0500000 {
-			compatible = "cache";
-			cache-level = <2>;
-			cache-size = <0x40000>;
-			reg = <0x0 0xe0500000 0x0 0x40000>;
-		};
+	L2: l2-cache@e0500000 {
+		compatible = "v5l2cache";
+		cache-level = <2>;
+		cache-size = <0x40000>;
+		reg = <0x0 0xe0500000 0x0 0x40000>;
+		andes,inst-prefetch = <3>;
+		andes,data-prefetch = <3>;
+		/* The value format is <XRAMOCTL XRAMICTL> */
+		andes,tag-ram-ctl = <0 0>;
+		andes,data-ram-ctl = <0 0>;
 	};
 
 	memory@0 {

arch/riscv/lib/andes_plic.c

@@ -44,15 +44,12 @@ static int init_plic(void);
 		}							\
 	} while (0)
 
-static int enable_ipi(int harts)
+static int enable_ipi(int hart)
 {
-	int i;
-	int en = ENABLE_HART_IPI;
+	int en;
 
-	for (i = 0; i < harts; i++) {
-		en = en >> i;
-		writel(en, (void __iomem *)ENABLE_REG(gd->arch.plic, i));
-	}
+	en = ENABLE_HART_IPI >> hart;
+	writel(en, (void __iomem *)ENABLE_REG(gd->arch.plic, hart));
 
 	return 0;
 }
@@ -60,18 +57,35 @@ static int enable_ipi(int harts)
 static int init_plic(void)
 {
 	struct udevice *dev;
+	ofnode node;
 	int ret;
+	u32 reg;
 
 	ret = uclass_find_first_device(UCLASS_CPU, &dev);
 	if (ret)
 		return ret;
 
 	if (ret == 0 && dev) {
-		ret = cpu_get_count(dev);
-		if (ret < 0)
-			return ret;
+		ofnode_for_each_subnode(node, dev_ofnode(dev->parent)) {
+			const char *device_type;
+
+			device_type = ofnode_read_string(node, "device_type");
+			if (!device_type)
+				continue;
+
+			if (strcmp(device_type, "cpu"))
+				continue;
+
+			/* skip if hart is marked as not available */
+			if (!ofnode_is_available(node))
+				continue;
+
+			/* read hart ID of CPU */
+			ret = ofnode_read_u32(node, "reg", &reg);
+			if (ret == 0)
+				enable_ipi(reg);
+		}
 
-		enable_ipi(ret);
 		return 0;
 	}
 

board/AndesTech/ax25-ae350/ax25-ae350.c

@@ -11,6 +11,7 @@
 #include <linux/io.h>
 #include <faraday/ftsmc020.h>
 #include <fdtdec.h>
+#include <dm.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -93,10 +94,18 @@ int smc_init(void)
 	return 0;
 }
 
+static void v5l2_init(void)
+{
+	struct udevice *dev;
+
+	uclass_get_device(UCLASS_CACHE, 0, &dev);
+}
+
 #ifdef CONFIG_BOARD_EARLY_INIT_F
 int board_early_init_f(void)
 {
 	smc_init();
+	v5l2_init();
 
 	return 0;
 }

board/sifive/fu540/fu540.c

@@ -122,10 +122,20 @@ static void fu540_setup_macaddr(u32 serialnum)
 
 int misc_init_r(void)
 {
-	/* Set ethaddr environment variable if not set */
-	if (!env_get("ethaddr"))
-		fu540_setup_macaddr(fu540_read_serialnum());
+	u32 serial_num;
+	char buf[9] = {0};
 
+	/* Set ethaddr environment variable from board serial number */
+	if (!env_get("serial#")) {
+		serial_num = fu540_read_serialnum();
+		if (!serial_num) {
+			WARN(true, "Board serial number should not be 0 !!\n");
+			return 0;
+		}
+		snprintf(buf, sizeof(buf), "%08x", serial_num);
+		env_set("serial#", buf);
+		fu540_setup_macaddr(serial_num);
+	}
 	return 0;
 }
 

drivers/cache/Kconfig

@@ -22,4 +22,13 @@ config L2X0_CACHE
 	  ARMv7(32-bit) devices. The driver configures the cache settings
 	  found in the device tree.
 
+config V5L2_CACHE
+	bool "Andes V5L2 cache driver"
+	select CACHE
+	depends on RISCV_NDS_CACHE
+	help
+	  Support Andes V5L2 cache controller in AE350 platform.
+	  It will configure tag and data ram timing control from the
+	  device tree and enable L2 cache.
+
 endmenu

drivers/cache/Makefile

@@ -2,3 +2,4 @@
 obj-$(CONFIG_CACHE) += cache-uclass.o
 obj-$(CONFIG_SANDBOX) += sandbox_cache.o
 obj-$(CONFIG_L2X0_CACHE) += cache-l2x0.o
+obj-$(CONFIG_V5L2_CACHE) += cache-v5l2.o

drivers/cache/cache-uclass.c

@@ -17,6 +17,26 @@ int cache_get_info(struct udevice *dev, struct cache_info *info)
 	return ops->get_info(dev, info);
 }
 
+int cache_enable(struct udevice *dev)
+{
+	struct cache_ops *ops = cache_get_ops(dev);
+
+	if (!ops->enable)
+		return -ENOSYS;
+
+	return ops->enable(dev);
+}
+
+int cache_disable(struct udevice *dev)
+{
+	struct cache_ops *ops = cache_get_ops(dev);
+
+	if (!ops->disable)
+		return -ENOSYS;
+
+	return ops->disable(dev);
+}
+
 UCLASS_DRIVER(cache) = {
 	.id		= UCLASS_CACHE,
 	.name		= "cache",

drivers/cache/cache-v5l2.c

@@ -0,0 +1,186 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2019 Andes Technology Corporation
+ * Rick Chen, Andes Technology Corporation <rick@andestech.com>
+ */
+
+#include <common.h>
+#include <command.h>
+#include <cache.h>
+#include <dm.h>
+#include <asm/io.h>
+#include <dm/ofnode.h>
+
+struct l2cache {
+	volatile u64	configure;
+	volatile u64	control;
+	volatile u64	hpm0;
+	volatile u64	hpm1;
+	volatile u64	hpm2;
+	volatile u64	hpm3;
+	volatile u64	error_status;
+	volatile u64	ecc_error;
+	volatile u64	cctl_command0;
+	volatile u64	cctl_access_line0;
+	volatile u64	cctl_command1;
+	volatile u64	cctl_access_line1;
+	volatile u64	cctl_command2;
+	volatile u64	cctl_access_line2;
+	volatile u64	cctl_command3;
+	volatile u64	cctl_access_line4;
+	volatile u64	cctl_status;
+};
+
+/* Control Register */
+#define L2_ENABLE	0x1
+/* prefetch */
+#define IPREPETCH_OFF	3
+#define DPREPETCH_OFF	5
+#define IPREPETCH_MSK	(3 << IPREPETCH_OFF)
+#define DPREPETCH_MSK	(3 << DPREPETCH_OFF)
+/* tag ram */
+#define TRAMOCTL_OFF	8
+#define TRAMICTL_OFF	10
+#define TRAMOCTL_MSK	(3 << TRAMOCTL_OFF)
+#define TRAMICTL_MSK	BIT(TRAMICTL_OFF)
+/* data ram */
+#define DRAMOCTL_OFF	11
+#define DRAMICTL_OFF	13
+#define DRAMOCTL_MSK	(3 << DRAMOCTL_OFF)
+#define DRAMICTL_MSK	BIT(DRAMICTL_OFF)
+
+/* CCTL Command Register */
+#define CCTL_CMD_REG(base, hart)	((ulong)(base) + 0x40 + (hart) * 0x10)
+#define L2_WBINVAL_ALL	0x12
+
+/* CCTL Status Register */
+#define CCTL_STATUS_MSK(hart)		(0xf << ((hart) * 4))
+#define CCTL_STATUS_IDLE(hart)		(0 << ((hart) * 4))
+#define CCTL_STATUS_PROCESS(hart)	(1 << ((hart) * 4))
+#define CCTL_STATUS_ILLEGAL(hart)	(2 << ((hart) * 4))
+
+DECLARE_GLOBAL_DATA_PTR;
+
+struct v5l2_plat {
+	struct l2cache	*regs;
+	u32		iprefetch;
+	u32		dprefetch;
+	u32 		tram_ctl[2];
+	u32 		dram_ctl[2];
+};
+
+static int v5l2_enable(struct udevice *dev)
+{
+	struct v5l2_plat *plat = dev_get_platdata(dev);
+	volatile struct l2cache *regs = plat->regs;
+
+	if (regs)
+		setbits_le32(&regs->control, L2_ENABLE);
+
+	return 0;
+}
+
+static int v5l2_disable(struct udevice *dev)
+{
+	struct v5l2_plat *plat = dev_get_platdata(dev);
+	volatile struct l2cache *regs = plat->regs;
+	u8 hart = gd->arch.boot_hart;
+	void __iomem *cctlcmd = (void __iomem *)CCTL_CMD_REG(regs, hart);
+
+	if ((regs) && (readl(&regs->control) & L2_ENABLE)) {
+		writel(L2_WBINVAL_ALL, cctlcmd);
+
+		while ((readl(&regs->cctl_status) & CCTL_STATUS_MSK(hart))) {
+			if ((readl(&regs->cctl_status) & CCTL_STATUS_ILLEGAL(hart))) {
+				printf("L2 flush illegal! hanging...");
+				hang();
+			}
+		}
+		clrbits_le32(&regs->control, L2_ENABLE);
+	}
+
+	return 0;
+}
+
+static int v5l2_ofdata_to_platdata(struct udevice *dev)
+{
+	struct v5l2_plat *plat = dev_get_platdata(dev);
+	struct l2cache *regs;
+
+	regs = (struct l2cache *)dev_read_addr(dev);
+	plat->regs = regs;
+
+	plat->iprefetch = -EINVAL;
+	plat->dprefetch = -EINVAL;
+	plat->tram_ctl[0] = -EINVAL;
+	plat->dram_ctl[0] = -EINVAL;
+
+	/* Instruction and data fetch prefetch depth */
+	dev_read_u32(dev, "andes,inst-prefetch", &plat->iprefetch);
+	dev_read_u32(dev, "andes,data-prefetch", &plat->dprefetch);
+
+	/* Set tag RAM and data RAM setup and output cycle */
+	dev_read_u32_array(dev, "andes,tag-ram-ctl", plat->tram_ctl, 2);
+	dev_read_u32_array(dev, "andes,data-ram-ctl", plat->dram_ctl, 2);
+
+	return 0;
+}
+
+static int v5l2_probe(struct udevice *dev)
+{
+	struct v5l2_plat *plat = dev_get_platdata(dev);
+	struct l2cache *regs = plat->regs;
+	u32 ctl_val;
+
+	ctl_val = readl(&regs->control);
+
+	if (!(ctl_val & L2_ENABLE))
+		ctl_val |= L2_ENABLE;
+
+	if (plat->iprefetch != -EINVAL) {
+		ctl_val &= ~(IPREPETCH_MSK);
+		ctl_val |= (plat->iprefetch << IPREPETCH_OFF);
+	}
+
+	if (plat->dprefetch != -EINVAL) {
+		ctl_val &= ~(DPREPETCH_MSK);
+		ctl_val |= (plat->dprefetch << DPREPETCH_OFF);
+	}
+
+	if (plat->tram_ctl[0] != -EINVAL) {
+		ctl_val &= ~(TRAMOCTL_MSK | TRAMICTL_MSK);
+		ctl_val |= plat->tram_ctl[0] << TRAMOCTL_OFF;
+		ctl_val |= plat->tram_ctl[1] << TRAMICTL_OFF;
+	}
+
+	if (plat->dram_ctl[0] != -EINVAL) {
+		ctl_val &= ~(DRAMOCTL_MSK | DRAMICTL_MSK);
+		ctl_val |= plat->dram_ctl[0] << DRAMOCTL_OFF;
+		ctl_val |= plat->dram_ctl[1] << DRAMICTL_OFF;
+	}
+
+	writel(ctl_val, &regs->control);
+
+	return 0;
+}
+
+static const struct udevice_id v5l2_cache_ids[] = {
+	{ .compatible = "v5l2cache" },
+	{}
+};
+
+static const struct cache_ops v5l2_cache_ops = {
+	.enable		= v5l2_enable,
+	.disable	= v5l2_disable,
+};
+
+U_BOOT_DRIVER(v5l2_cache) = {
+	.name   = "v5l2_cache",
+	.id     = UCLASS_CACHE,
+	.of_match = v5l2_cache_ids,
+	.ofdata_to_platdata = v5l2_ofdata_to_platdata,
+	.probe	= v5l2_probe,
+	.platdata_auto_alloc_size = sizeof(struct v5l2_plat),
+	.ops = &v5l2_cache_ops,
+	.flags  = DM_FLAG_PRE_RELOC,
+};

drivers/cache/sandbox_cache.c

@@ -17,8 +17,21 @@ static int sandbox_get_info(struct udevice *dev, struct cache_info *info)
 	return 0;
 }
 
+static int sandbox_enable(struct udevice *dev)
+{
+	return 0;
+}
+
+static int snadbox_disable(struct udevice *dev)
+{
+	return 0;
+}
+
+
 static const struct cache_ops sandbox_cache_ops = {
 	.get_info	= sandbox_get_info,
+	.enable 	= sandbox_enable,
+	.disable	= snadbox_disable,
 };
 
 static const struct udevice_id sandbox_cache_ids[] = {

drivers/cpu/riscv_cpu.c

@@ -46,6 +46,10 @@ static int riscv_cpu_get_count(struct udevice *dev)
 	ofnode_for_each_subnode(node, dev_ofnode(dev->parent)) {
 		const char *device_type;
 
+		/* skip if hart is marked as not available in the device tree */
+		if (!ofnode_is_available(node))
+			continue;
+
 		device_type = ofnode_read_string(node, "device_type");
 		if (!device_type)
 			continue;

include/cache.h

@@ -22,6 +22,22 @@ struct cache_ops {
 	 * @return 0 if OK, -ve on error
 	 */
 	int (*get_info)(struct udevice *dev, struct cache_info *info);
+
+	/**
+	 * enable() - Enable cache
+	 *
+	 * @dev:	Device to check (UCLASS_CACHE)
+	 * @return 0 if OK, -ve on error
+	 */
+	int (*enable)(struct udevice *dev);
+
+	/**
+	 * disable() - Flush and disable cache
+	 *
+	 * @dev:	Device to check (UCLASS_CACHE)
+	 * @return 0 if OK, -ve on error
+	 */
+	int (*disable)(struct udevice *dev);
 };
 
 #define cache_get_ops(dev)	((struct cache_ops *)(dev)->driver->ops)
@@ -35,4 +51,19 @@ struct cache_ops {
  */
 int cache_get_info(struct udevice *dev, struct cache_info *info);
 
+/**
+ * cache_enable() - Enable cache
+ *
+ * @dev:	Device to check (UCLASS_CACHE)
+ * @return 0 if OK, -ve on error
+ */
+int cache_enable(struct udevice *dev);
+
+/**
+ * cache_disable() - Flush and disable cache
+ *
+ * @dev:	Device to check (UCLASS_CACHE)
+ * @return 0 if OK, -ve on error
+ */
+int cache_disable(struct udevice *dev);
 #endif

include/configs/sifive-fu540.h

@@ -26,6 +26,7 @@
 #define CONFIG_ENV_SIZE			SZ_128K
 
 #define BOOT_TARGET_DEVICES(func) \
+	func(MMC, mmc, 0) \
 	func(DHCP, dhcp, na)
 
 #include <config_distro_bootcmd.h>

test/dm/cache.c

@@ -14,6 +14,8 @@ static int dm_test_reset(struct unit_test_state *uts)
 
 	ut_assertok(uclass_get_device(UCLASS_CACHE, 0, &dev_cache));
 	ut_assertok(cache_get_info(dev, &info));
+	ut_assertok(cache_enable(dev));
+	ut_assertok(cache_disable(dev));
 
 	return 0;
 }

tools/prelink-riscv.inc

@@ -27,6 +27,8 @@
 #define target32_to_cpu CONCAT(PRELINK_BYTEORDER, 32_to_cpu)
 #define target64_to_cpu CONCAT(PRELINK_BYTEORDER, 64_to_cpu)
 #define targetnn_to_cpu CONCAT3(PRELINK_BYTEORDER, PRELINK_INC_BITS, _to_cpu)
+#define cpu_to_target32 CONCAT3(cpu_to_, PRELINK_BYTEORDER, 32)
+#define cpu_to_target64 CONCAT3(cpu_to_, PRELINK_BYTEORDER, 64)
 
 static void* get_offset_bonn (void* data, Elf_Phdr* phdrs, size_t phnum, Elf_Addr addr)
 {
@@ -92,9 +94,9 @@ static void prelink_bonn(void *data)
 		if (ELF_R_TYPE(targetnn_to_cpu(r->r_info)) == R_RISCV_RELATIVE)
 			*((uintnn_t*) buf) = r->r_addend;
 		else if (ELF_R_TYPE(targetnn_to_cpu(r->r_info)) == R_RISCV_32)
-			*((uint32_t*) buf) = dynsym[ELF_R_SYM(targetnn_to_cpu(r->r_info))].st_value;
+			*((uint32_t*) buf) = cpu_to_target32(targetnn_to_cpu(dynsym[ELF_R_SYM(targetnn_to_cpu(r->r_info))].st_value) + targetnn_to_cpu(r->r_addend));
 		else if (ELF_R_TYPE(targetnn_to_cpu(r->r_info)) == R_RISCV_64)
-			*((uint64_t*) buf) = dynsym[ELF_R_SYM(targetnn_to_cpu(r->r_info))].st_value;
+			*((uint64_t*) buf) = cpu_to_target64(targetnn_to_cpu(dynsym[ELF_R_SYM(targetnn_to_cpu(r->r_info))].st_value) + targetnn_to_cpu(r->r_addend));
 	}
 }
 
@@ -113,6 +115,8 @@ static void prelink_bonn(void *data)
 #undef target32_to_cpu
 #undef target64_to_cpu
 #undef targetnn_to_cpu
+#undef cpu_to_target32
+#undef cpu_to_target64
 
 #undef CONCAT_IMPL
 #undef CONCAT