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

- Sipeed Maix support S-mode.
- Provide command sbi.
- Use fdtdec_get_addr_size_auto_parent to get fu540 cache base address.
- Fix a compiler error with CONFIG_SPL_SMP=n.
- Fix sifive ram driver 32 compiler warnings.
- Fix kendryte/pll.h redefine nop() warning.

12 files changed, 197 insertions, 5 deletions

diff --git a/arch/riscv/cpu/fu540/cache.c b/arch/riscv/cpu/fu540/cache.c
index 54de14238c..78f5ad9d60 100644
--- a/arch/riscv/cpu/fu540/cache.c
+++ b/arch/riscv/cpu/fu540/cache.c
@@ -35,7 +35,8 @@ int cache_enable_ways(void)
 	if (node < 0)
 		return node;
 
-	base = fdtdec_get_addr(blob, node, "reg");
+	base = fdtdec_get_addr_size_auto_parent(blob, 0, node, "reg", 0,
+						NULL, false);
 	if (base == FDT_ADDR_T_NONE)
 		return FDT_ADDR_T_NONE;
 
diff --git a/arch/riscv/include/asm/sbi.h b/arch/riscv/include/asm/sbi.h
index 08e1ac0c0e..53ca316180 100644
--- a/arch/riscv/include/asm/sbi.h
+++ b/arch/riscv/include/asm/sbi.h
@@ -115,6 +115,8 @@ void sbi_remote_sfence_vma_asid(const unsigned long *hart_mask,
 				unsigned long asid);
 #endif
 void sbi_set_timer(uint64_t stime_value);
+long sbi_get_spec_version(void);
+int sbi_get_impl_id(void);
 int sbi_probe_extension(int ext);
 
 #endif
diff --git a/arch/riscv/lib/sbi.c b/arch/riscv/lib/sbi.c
index 8fbc23839d..77845a73ca 100644
--- a/arch/riscv/lib/sbi.c
+++ b/arch/riscv/lib/sbi.c
@@ -54,6 +54,42 @@ void sbi_set_timer(uint64_t stime_value)
 }
 
 /**
+ * sbi_get_spec_version() - get current SBI specification version
+ *
+ * Return: version id
+ */
+long sbi_get_spec_version(void)
+{
+	struct sbiret ret;
+
+	ret = sbi_ecall(SBI_EXT_BASE, SBI_EXT_BASE_GET_SPEC_VERSION,
+			0, 0, 0, 0, 0, 0);
+	if (!ret.error)
+		if (ret.value)
+			return ret.value;
+
+	return -ENOTSUPP;
+}
+
+/**
+ * sbi_get_impl_id() - get SBI implementation ID
+ *
+ * Return: implementation ID
+ */
+int sbi_get_impl_id(void)
+{
+	struct sbiret ret;
+
+	ret = sbi_ecall(SBI_EXT_BASE, SBI_EXT_BASE_GET_IMP_ID,
+			0, 0, 0, 0, 0, 0);
+	if (!ret.error)
+		if (ret.value)
+			return ret.value;
+
+	return -ENOTSUPP;
+}
+
+/**
  * sbi_probe_extension() - Check if an SBI extension ID is supported or not.
  * @extid: The extension ID to be probed.
  *
diff --git a/arch/riscv/lib/spl.c b/arch/riscv/lib/spl.c
index e24ec5a46c..5e19d0f36a 100644
--- a/arch/riscv/lib/spl.c
+++ b/arch/riscv/lib/spl.c
@@ -39,7 +39,7 @@ void __noreturn jump_to_image_no_args(struct spl_image_info *spl_image)
 {
 	typedef void __noreturn (*image_entry_riscv_t)(ulong hart, void *dtb);
 	void *fdt_blob;
-	int ret;
+	__maybe_unused int ret;
 
 #if CONFIG_IS_ENABLED(LOAD_FIT) || CONFIG_IS_ENABLED(LOAD_FIT_FULL)
 	fdt_blob = spl_image->fdt_addr;
diff --git a/board/sipeed/maix/MAINTAINERS b/board/sipeed/maix/MAINTAINERS
index e7bb9ec433..0778af7a55 100644
--- a/board/sipeed/maix/MAINTAINERS
+++ b/board/sipeed/maix/MAINTAINERS
@@ -4,7 +4,7 @@ S:	Maintained
 F:	arch/riscv/dts/k210.dtsi
 F:	arch/riscv/dts/k210-maix-bit.dts
 F:	board/sipeed/maix/
-F:	configs/sipeed_maix_bitm_defconfig
+F:	configs/sipeed_maix*_defconfig
 F:	doc/board/sipeed/
 F:	include/configs/sipeed-maix.h
 F:	include/dt-bindings/*/k210-sysctl.h
diff --git a/cmd/Kconfig b/cmd/Kconfig
index 9ad511aa17..30c26b5d2b 100644
--- a/cmd/Kconfig
+++ b/cmd/Kconfig
@@ -270,6 +270,12 @@ config SPL_CMD_TLV_EEPROM
 	help
 	  Read system EEPROM data block in ONIE Tlvinfo format from SPL.
 
+config CMD_SBI
+	bool "sbi"
+	depends on RISCV_SMODE && SBI_V02
+	help
+	  Display information about the SBI implementation.
+
 endmenu
 
 menu "Boot commands"
diff --git a/cmd/riscv/Makefile b/cmd/riscv/Makefile
index 24df023ece..1e6ac364e3 100644
--- a/cmd/riscv/Makefile
+++ b/cmd/riscv/Makefile
@@ -1,3 +1,4 @@
 # SPDX-License-Identifier: GPL-2.0+
 
 obj-$(CONFIG_CMD_EXCEPTION) += exception.o
+obj-$(CONFIG_CMD_SBI) += sbi.o
diff --git a/cmd/riscv/sbi.c b/cmd/riscv/sbi.c
new file mode 100644
index 0000000000..e66fc8e41d
--- /dev/null
+++ b/cmd/riscv/sbi.c
@@ -0,0 +1,82 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * The 'sbi' command displays information about the SBI implementation.
+ *
+ * Copyright (c) 2020, Heinrich Schuchardt <xypron.glpk@gmx.de>
+ */
+
+#include <common.h>
+#include <command.h>
+#include <asm/sbi.h>
+
+struct sbi_ext {
+	const u32 id;
+	const char *name;
+};
+
+static struct sbi_ext extensions[] = {
+	{ 0x00000000, "sbi_set_timer" },
+	{ 0x00000001, "sbi_console_putchar" },
+	{ 0x00000002, "sbi_console_getchar" },
+	{ 0x00000003, "sbi_clear_ipi" },
+	{ 0x00000004, "sbi_send_ipi" },
+	{ 0x00000005, "sbi_remote_fence_i" },
+	{ 0x00000006, "sbi_remote_sfence_vma" },
+	{ 0x00000007, "sbi_remote_sfence_vma_asid" },
+	{ 0x00000008, "sbi_shutdown" },
+	{ 0x00000010, "SBI Base Functionality" },
+	{ 0x54494D45, "Timer Extension" },
+	{ 0x00735049, "IPI Extension" },
+	{ 0x52464E43, "RFENCE Extension" },
+	{ 0x0048534D, "Hart State Management Extension" },
+};
+
+static int do_sbi(struct cmd_tbl *cmdtp, int flag, int argc,
+		  char *const argv[])
+{
+	int i;
+	long ret;
+
+	ret = sbi_get_spec_version();
+	if (ret >= 0)
+		printf("SBI %ld.%ld\n", ret >> 24, ret & 0xffffff);
+	ret = sbi_get_impl_id();
+	if (ret >= 0) {
+		switch (ret) {
+		case 0:
+			printf("Berkeley Boot Loader (BBL)\n");
+			break;
+		case 1:
+			printf("OpenSBI\n");
+			break;
+		case 2:
+			printf("Xvisor\n");
+			break;
+		case 3:
+			printf("KVM\n");
+			break;
+		default:
+			printf("Unknown implementation\n");
+			break;
+		}
+	}
+	printf("Extensions:\n");
+	for (i = 0; i < ARRAY_SIZE(extensions); ++i) {
+		ret = sbi_probe_extension(extensions[i].id);
+		if (ret > 0)
+			printf("  %s\n", extensions[i].name);
+	}
+	return 0;
+}
+
+#ifdef CONFIG_SYS_LONGHELP
+static char sbi_help_text[] =
+	"- display SBI spec version, implementation, and available extensions";
+
+#endif
+
+U_BOOT_CMD_COMPLETE(
+	sbi, 1, 0, do_sbi,
+	"display SBI information",
+	sbi_help_text, NULL
+);
diff --git a/configs/sipeed_maix_smode_defconfig b/configs/sipeed_maix_smode_defconfig
new file mode 100644
index 0000000000..2516bb7258
--- /dev/null
+++ b/configs/sipeed_maix_smode_defconfig
@@ -0,0 +1,10 @@
+CONFIG_RISCV=y
+CONFIG_SYS_TEXT_BASE=0x80020000
+CONFIG_TARGET_SIPEED_MAIX=y
+CONFIG_ARCH_RV64I=y
+CONFIG_RISCV_SMODE=y
+CONFIG_STACK_SIZE=0x100000
+# CONFIG_NET is not set
+# CONFIG_INPUT is not set
+# CONFIG_DM_ETH is not set
+# CONFIG_EFI_UNICODE_CAPITALIZATION is not set
diff --git a/doc/board/sipeed/maix.rst b/doc/board/sipeed/maix.rst
index b1894f3a6f..efcde9aebf 100644
--- a/doc/board/sipeed/maix.rst
+++ b/doc/board/sipeed/maix.rst
@@ -75,6 +75,49 @@ console shall be opened immediately. Boot output should look like the following:
     Err:   serial@38000000
     =>
 
+OpenSBI
+^^^^^^^
+
+OpenSBI is an open source supervisor execution environment implementing the
+RISC-V Supervisor Binary Interface Specification [1]. One of its features is
+to intercept run-time exceptions, e.g. for unaligned access or illegal
+instructions, and to emulate the failing instructions.
+
+The OpenSBI source can be downloaded via:
+
+.. code-block:: bash
+
+    git clone https://github.com/riscv/opensbi
+
+As OpenSBI will be loaded at 0x80000000 we have to adjust the U-Boot text base.
+Furthermore we have to enable building U-Boot for S-mode::
+
+    CONFIG_SYS_TEXT_BASE=0x80020000
+    CONFIG_RISCV_SMODE=y
+
+Both settings are contained in sipeed_maix_smode_defconfig so we can build
+U-Boot with:
+
+.. code-block:: bash
+
+    make sipeed_maix_smode_defconfig
+    make
+
+To build OpenSBI with U-Boot as a payload:
+
+.. code-block:: bash
+
+    cd opensbi
+    make \
+    PLATFORM=kendryte/k210 \
+    FW_PAYLOAD=y \
+    FW_PAYLOAD_OFFSET=0x20000 \
+    FW_PAYLOAD_PATH=<path to U-Boot>/u-boot-dtb.bin
+
+The value of FW_PAYLOAD_OFFSET must match CONFIG_SYS_TEXT_BASE - 0x80000000.
+
+The file to flash is build/platform/kendryte/k210/firmware/fw_payload.bin.
+
 Loading Images
 ^^^^^^^^^^^^^^
 
@@ -363,3 +406,9 @@ Address    Size      Description
                      interrupts)
 0x8801f000 0x1000    credits
 ========== ========= ===========
+
+Links
+-----
+
+[1] https://github.com/riscv/riscv-sbi-doc
+    RISC-V Supervisor Binary Interface Specification
diff --git a/drivers/ram/sifive/fu540_ddr.c b/drivers/ram/sifive/fu540_ddr.c
index 2eef1e7565..5ff88692a8 100644
--- a/drivers/ram/sifive/fu540_ddr.c
+++ b/drivers/ram/sifive/fu540_ddr.c
@@ -316,12 +316,12 @@ static int fu540_ddr_setup(struct udevice *dev)
 	priv->info.size = get_ram_size((long *)priv->info.base,
 				       ddr_size);
 
-	debug("%s : %lx\n", __func__, priv->info.size);
+	debug("%s : %lx\n", __func__, (uintptr_t)priv->info.size);
 
 	/* check memory access for all memory */
 	if (priv->info.size != ddr_size) {
 		printf("DDR invalid size : 0x%lx, expected 0x%lx\n",
-		       priv->info.size, (uintptr_t)ddr_size);
+		       (uintptr_t)priv->info.size, (uintptr_t)ddr_size);
 		return -EINVAL;
 	}
 
diff --git a/include/kendryte/pll.h b/include/kendryte/pll.h
index c8e3200799..55a40b9c97 100644
--- a/include/kendryte/pll.h
+++ b/include/kendryte/pll.h
@@ -7,6 +7,7 @@
 
 #include <clk.h>
 #include <test/export.h>
+#include <asm/io.h>
 
 #define K210_PLL_CLKR GENMASK(3, 0)
 #define K210_PLL_CLKF GENMASK(9, 4)
@@ -43,9 +44,13 @@ struct k210_pll_config {
 #ifdef CONFIG_UNIT_TEST
 TEST_STATIC int k210_pll_calc_config(u32 rate, u32 rate_in,
 				     struct k210_pll_config *best);
+
+#ifndef nop
 #define nop()
 #endif
 
+#endif
+
 extern const struct clk_ops k210_pll_ops;
 
 struct clk *k210_register_pll_struct(const char *name, const char *parent_name,