arm64: mvebu: Add basic support for the Marvell Armada 7K/8K SoC

Compared to the Armada 3700, the Armada 7K and 8K are much more on the
high-end side: they use a dual Cortex-A72 or a quad Cortex-A72, as
opposed to the Cortex-A53 for the Armada 3700.

The Armada 7K and 8K also use a fairly unique architecture, internally
they are composed of several components:

- One AP (Application Processor), which contains the processor itself
  and a few core hardware blocks. The AP used in the Armada 7K and 8K
  is called AP806, and is available in two configurations:
  dual Cortex-A72 and quad Cortex-A72.
- One or two CP (Communication Processor), which contain most of the I/O
  interfaces (SATA, PCIe, Ethernet, etc.). The 7K family chips have one
  CP, while the 8K family chips integrate two CPs, providing two times
  the number of I/O interfaces available in the CP.
  The CP used in the 7K and 8K is called CP110.

All in all, this gives the following combinations:

- Armada 7020, which is a dual Cortex-A72 with one CP
- Armada 7040, which is a quad Cortex-A72 with one CP
- Armada 8020, which is a dual Cortex-A72 with two CPs
- Armada 8040, which is a quad Cortex-A72 with two CPs

This patch adds basic support for this ARMv8 based SoC into U-Boot.
Future patches will integrate other device drivers and board support,
starting with the Marvell DB-88F7040 development board.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Nadav Haklai <nadavh@marvell.com>
Cc: Neta Zur Hershkovits <neta@marvell.com>
Cc: Kostya Porotchkin <kostap@marvell.com>
Cc: Omri Itach <omrii@marvell.com>
Cc: Igal Liberman <igall@marvell.com>
Cc: Haim Boot <hayim@marvell.com>
Cc: Hanna Hawa <hannah@marvell.com>

9 files changed, 215 insertions, 109 deletions

diff --git a/arch/arm/mach-mvebu/Kconfig b/arch/arm/mach-mvebu/Kconfig
index 58f2296..6717844 100644
--- a/arch/arm/mach-mvebu/Kconfig
+++ b/arch/arm/mach-mvebu/Kconfig
@@ -31,6 +31,11 @@ config ARMADA_3700
 	bool
 	select ARM64
 
+# Armada 7K and 8K are very similar - use only one Kconfig symbol for both
+config ARMADA_8K
+	bool
+	select ARM64
+
 # Armada XP/38x SoC types...
 config MV78230
 	bool
@@ -49,7 +54,7 @@ config 88F6820
 	select ARMADA_38X
 
 choice
-	prompt "Marvell MVEBU (Armada XP/375/38x/3700) board select"
+	prompt "Armada XP/375/38x/3700/7K/8K board select"
 	optional
 
 config TARGET_CLEARFOG
diff --git a/arch/arm/mach-mvebu/Makefile b/arch/arm/mach-mvebu/Makefile
index 07dc16c..65e90c4 100644
--- a/arch/arm/mach-mvebu/Makefile
+++ b/arch/arm/mach-mvebu/Makefile
@@ -7,6 +7,9 @@
 ifdef CONFIG_ARM64
 
 obj-$(CONFIG_ARMADA_3700) += armada3700/
+obj-$(CONFIG_ARMADA_8K) += armada8k/
+obj-y += arm64-common.o
+obj-y += sata.o
 
 else # CONFIG_ARM64
 
diff --git a/arch/arm/mach-mvebu/arm64-common.c b/arch/arm/mach-mvebu/arm64-common.c
new file mode 100644
index 0000000..7055a81
--- /dev/null
+++ b/arch/arm/mach-mvebu/arm64-common.c
@@ -0,0 +1,124 @@
+/*
+ * Copyright (C) 2016 Stefan Roese <sr@denx.de>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <fdtdec.h>
+#include <libfdt.h>
+#include <asm/io.h>
+#include <asm/system.h>
+#include <asm/arch/cpu.h>
+#include <asm/arch/soc.h>
+#include <asm/armv8/mmu.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/*
+ * On ARMv8, MBus is not configured in U-Boot. To enable compilation
+ * of the already implemented drivers, lets add a dummy version of
+ * this function so that linking does not fail.
+ */
+const struct mbus_dram_target_info *mvebu_mbus_dram_info(void)
+{
+	return NULL;
+}
+
+/* DRAM init code ... */
+
+static const void *get_memory_reg_prop(const void *fdt, int *lenp)
+{
+	int offset;
+
+	offset = fdt_path_offset(fdt, "/memory");
+	if (offset < 0)
+		return NULL;
+
+	return fdt_getprop(fdt, offset, "reg", lenp);
+}
+
+int dram_init(void)
+{
+	const void *fdt = gd->fdt_blob;
+	const fdt32_t *val;
+	int ac, sc, len;
+
+	ac = fdt_address_cells(fdt, 0);
+	sc = fdt_size_cells(fdt, 0);
+	if (ac < 0 || sc < 1 || sc > 2) {
+		printf("invalid address/size cells\n");
+		return -EINVAL;
+	}
+
+	val = get_memory_reg_prop(fdt, &len);
+	if (len / sizeof(*val) < ac + sc)
+		return -EINVAL;
+
+	val += ac;
+
+	gd->ram_size = fdtdec_get_number(val, sc);
+
+	debug("DRAM size = %08lx\n", (unsigned long)gd->ram_size);
+
+	return 0;
+}
+
+void dram_init_banksize(void)
+{
+	const void *fdt = gd->fdt_blob;
+	const fdt32_t *val;
+	int ac, sc, cells, len, i;
+
+	val = get_memory_reg_prop(fdt, &len);
+	if (len < 0)
+		return;
+
+	ac = fdt_address_cells(fdt, 0);
+	sc = fdt_size_cells(fdt, 0);
+	if (ac < 1 || sc > 2 || sc < 1 || sc > 2) {
+		printf("invalid address/size cells\n");
+		return;
+	}
+
+	cells = ac + sc;
+
+	len /= sizeof(*val);
+
+	for (i = 0; i < CONFIG_NR_DRAM_BANKS && len >= cells;
+	     i++, len -= cells) {
+		gd->bd->bi_dram[i].start = fdtdec_get_number(val, ac);
+		val += ac;
+		gd->bd->bi_dram[i].size = fdtdec_get_number(val, sc);
+		val += sc;
+
+		debug("DRAM bank %d: start = %08lx, size = %08lx\n",
+		      i, (unsigned long)gd->bd->bi_dram[i].start,
+		      (unsigned long)gd->bd->bi_dram[i].size);
+	}
+}
+
+int arch_cpu_init(void)
+{
+	/* Nothing to do (yet) */
+	return 0;
+}
+
+int arch_early_init_r(void)
+{
+	struct udevice *dev;
+	int ret;
+
+	/* Call the comphy code via the MISC uclass driver */
+	ret = uclass_get_device(UCLASS_MISC, 0, &dev);
+	if (ret) {
+		debug("COMPHY init failed: %d\n", ret);
+		return -ENODEV;
+	}
+
+	/* Cause the SATA device to do its early init */
+	uclass_first_device(UCLASS_AHCI, &dev);
+
+	return 0;
+}
diff --git a/arch/arm/mach-mvebu/armada3700/Makefile b/arch/arm/mach-mvebu/armada3700/Makefile
index b1fac57..84c69d9 100644
--- a/arch/arm/mach-mvebu/armada3700/Makefile
+++ b/arch/arm/mach-mvebu/armada3700/Makefile
@@ -5,4 +5,3 @@
 #
 
 obj-y = cpu.o
-obj-y += sata.o
diff --git a/arch/arm/mach-mvebu/armada3700/cpu.c b/arch/arm/mach-mvebu/armada3700/cpu.c
index 7d8f7b8..6499eec 100644
--- a/arch/arm/mach-mvebu/armada3700/cpu.c
+++ b/arch/arm/mach-mvebu/armada3700/cpu.c
@@ -53,16 +53,6 @@ static struct mm_region mvebu_mem_map[] = {
 
 struct mm_region *mem_map = mvebu_mem_map;
 
-/*
- * On ARMv8, MBus is not configured in U-Boot. To enable compilation
- * of the already implemented drivers, lets add a dummy version of
- * this function so that linking does not fail.
- */
-const struct mbus_dram_target_info *mvebu_mbus_dram_info(void)
-{
-	return NULL;
-}
-
 void reset_cpu(ulong ignored)
 {
 	/*
@@ -89,100 +79,3 @@ u32 get_ref_clk(void)
 	else
 		return 40;
 }
-
-/* DRAM init code ... */
-
-static const void *get_memory_reg_prop(const void *fdt, int *lenp)
-{
-	int offset;
-
-	offset = fdt_path_offset(fdt, "/memory");
-	if (offset < 0)
-		return NULL;
-
-	return fdt_getprop(fdt, offset, "reg", lenp);
-}
-
-int dram_init(void)
-{
-	const void *fdt = gd->fdt_blob;
-	const fdt32_t *val;
-	int ac, sc, len;
-
-	ac = fdt_address_cells(fdt, 0);
-	sc = fdt_size_cells(fdt, 0);
-	if (ac < 0 || sc < 1 || sc > 2) {
-		printf("invalid address/size cells\n");
-		return -EINVAL;
-	}
-
-	val = get_memory_reg_prop(fdt, &len);
-	if (len / sizeof(*val) < ac + sc)
-		return -EINVAL;
-
-	val += ac;
-
-	gd->ram_size = fdtdec_get_number(val, sc);
-
-	debug("DRAM size = %08lx\n", (unsigned long)gd->ram_size);
-
-	return 0;
-}
-
-void dram_init_banksize(void)
-{
-	const void *fdt = gd->fdt_blob;
-	const fdt32_t *val;
-	int ac, sc, cells, len, i;
-
-	val = get_memory_reg_prop(fdt, &len);
-	if (len < 0)
-		return;
-
-	ac = fdt_address_cells(fdt, 0);
-	sc = fdt_size_cells(fdt, 0);
-	if (ac < 1 || sc > 2 || sc < 1 || sc > 2) {
-		printf("invalid address/size cells\n");
-		return;
-	}
-
-	cells = ac + sc;
-
-	len /= sizeof(*val);
-
-	for (i = 0; i < CONFIG_NR_DRAM_BANKS && len >= cells;
-	     i++, len -= cells) {
-		gd->bd->bi_dram[i].start = fdtdec_get_number(val, ac);
-		val += ac;
-		gd->bd->bi_dram[i].size = fdtdec_get_number(val, sc);
-		val += sc;
-
-		debug("DRAM bank %d: start = %08lx, size = %08lx\n",
-		      i, (unsigned long)gd->bd->bi_dram[i].start,
-		      (unsigned long)gd->bd->bi_dram[i].size);
-	}
-}
-
-int arch_cpu_init(void)
-{
-	/* Nothing to do (yet) */
-	return 0;
-}
-
-int arch_early_init_r(void)
-{
-	struct udevice *dev;
-	int ret;
-
-	/* Call the comphy code via the MISC uclass driver */
-	ret = uclass_get_device(UCLASS_MISC, 0, &dev);
-	if (ret) {
-		debug("COMPHY init failed: %d\n", ret);
-		return -ENODEV;
-	}
-
-	/* Cause the SATA device to do its early init */
-	uclass_first_device(UCLASS_AHCI, &dev);
-
-	return 0;
-}
diff --git a/arch/arm/mach-mvebu/armada8k/Makefile b/arch/arm/mach-mvebu/armada8k/Makefile
new file mode 100644
index 0000000..84c69d9
--- /dev/null
+++ b/arch/arm/mach-mvebu/armada8k/Makefile
@@ -0,0 +1,7 @@
+#
+# Copyright (C) 2016 Stefan Roese <sr@denx.de>
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
+obj-y = cpu.o
diff --git a/arch/arm/mach-mvebu/armada8k/cpu.c b/arch/arm/mach-mvebu/armada8k/cpu.c
new file mode 100644
index 0000000..036430c
--- /dev/null
+++ b/arch/arm/mach-mvebu/armada8k/cpu.c
@@ -0,0 +1,64 @@
+/*
+ * Copyright (C) 2016 Stefan Roese <sr@denx.de>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <fdtdec.h>
+#include <libfdt.h>
+#include <asm/io.h>
+#include <asm/system.h>
+#include <asm/arch/cpu.h>
+#include <asm/arch/soc.h>
+#include <asm/armv8/mmu.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/* Armada 7k/8k */
+#define MVEBU_RFU_BASE			(MVEBU_REGISTER(0x6f0000))
+#define RFU_GLOBAL_SW_RST		(MVEBU_RFU_BASE + 0x84)
+#define RFU_SW_RESET_OFFSET		0
+
+static struct mm_region mvebu_mem_map[] = {
+	{
+		/* RAM */
+		.phys = 0x0UL,
+		.virt = 0x0UL,
+		.size = 0x80000000UL,
+		.attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
+			 PTE_BLOCK_INNER_SHARE
+	},
+	{
+		/* SRAM, MMIO regions - AP806 region */
+		.phys = 0xf0000000UL,
+		.virt = 0xf0000000UL,
+		.size = 0x01000000UL,	/* 16MiB internal registers */
+		.attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
+			 PTE_BLOCK_NON_SHARE
+	},
+	{
+		/* SRAM, MMIO regions - CP110 region */
+		.phys = 0xf2000000UL,
+		.virt = 0xf2000000UL,
+		.size = 0x02000000UL,	/* 32MiB internal registers */
+		.attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
+			 PTE_BLOCK_NON_SHARE
+	},
+	{
+		/* List terminator */
+		0,
+	}
+};
+
+struct mm_region *mem_map = mvebu_mem_map;
+
+void reset_cpu(ulong ignored)
+{
+	u32 reg;
+
+	reg = readl(RFU_GLOBAL_SW_RST);
+	reg &= ~(1 << RFU_SW_RESET_OFFSET);
+	writel(reg, RFU_GLOBAL_SW_RST);
+}
diff --git a/arch/arm/mach-mvebu/include/mach/soc.h b/arch/arm/mach-mvebu/include/mach/soc.h
index 063d6cc..731fe65 100644
--- a/arch/arm/mach-mvebu/include/mach/soc.h
+++ b/arch/arm/mach-mvebu/include/mach/soc.h
@@ -46,6 +46,8 @@
  * required for the Linux kernel.
  */
 #define SOC_REGS_PHY_BASE	0xd0000000
+#elif defined(CONFIG_ARMADA_8K)
+#define SOC_REGS_PHY_BASE	0xf0000000
 #else
 #define SOC_REGS_PHY_BASE	0xf1000000
 #endif
diff --git a/arch/arm/mach-mvebu/armada3700/sata.c b/arch/arm/mach-mvebu/sata.c
index e0e8381..140a295 100644
--- a/arch/arm/mach-mvebu/armada3700/sata.c
+++ b/arch/arm/mach-mvebu/sata.c
@@ -19,6 +19,14 @@ __weak int board_ahci_enable(void)
 	return 0;
 }
 
+#ifdef CONFIG_ARMADA_8K
+/* CP110 has different AHCI port addresses */
+void __iomem *ahci_port_base(void __iomem *base, u32 port)
+{
+	return base + 0x10000 + (port * 0x10000);
+}
+#endif
+
 static int mvebu_ahci_probe(struct udevice *dev)
 {
 	/*
@@ -34,6 +42,7 @@ static int mvebu_ahci_probe(struct udevice *dev)
 
 static const struct udevice_id mvebu_ahci_ids[] = {
 	{ .compatible = "marvell,armada-3700-ahci" },
+	{ .compatible = "marvell,armada-8k-ahci" },
 	{ }
 };