ARM: MediaTek: Add support for MediaTek MT8512 SoC

Add support for MediaTek MT8512 SoC. This include the file
that will initialize the SoC after boot and its device tree.

Signed-off-by: mingming lee <mingming.lee@mediatek.com>

5 files changed, 130 insertions, 0 deletions

diff --git a/arch/arm/mach-mediatek/Kconfig b/arch/arm/mach-mediatek/Kconfig
index ad453a60c1..bca88b8db8 100644
--- a/arch/arm/mach-mediatek/Kconfig
+++ b/arch/arm/mach-mediatek/Kconfig
@@ -6,6 +6,10 @@ config SYS_SOC
 config SYS_VENDOR
 	default "mediatek"
 
+config MT8512
+	bool "MediaTek MT8512 SoC"
+	default n
+
 choice
 	prompt "MediaTek board select"
 
@@ -29,6 +33,16 @@ config TARGET_MT7629
 	  including DDR3, crypto engine, 3x3 11n/ac Wi-Fi, Gigabit Ethernet,
 	  switch, USB3.0, PCIe, UART, SPI, I2C and PWM.
 
+config TARGET_MT8512
+        bool "MediaTek MT8512 M1 Board"
+        select ARM64
+	select MT8512
+        help
+          The MediaTek MT8512 is a ARM64-based SoC with a quad-core Cortex-A53.
+          including UART, SPI, USB2.0 and OTG, SD and MMC cards, NAND, PWM,
+          Ethernet, IR TX/RX, I2C, I2S, S/PDIF, and built-in Wi-Fi / Bluetooth combo
+          chip and several DDR3 and DDR4 options.
+
 config TARGET_MT8516
 	bool "MediaTek MT8516 SoC"
 	select ARM64
@@ -51,6 +65,7 @@ endchoice
 
 source "board/mediatek/mt7623/Kconfig"
 source "board/mediatek/mt7629/Kconfig"
+source "board/mediatek/mt8512/Kconfig"
 source "board/mediatek/mt8518/Kconfig"
 source "board/mediatek/pumpkin/Kconfig"
 
diff --git a/arch/arm/mach-mediatek/Makefile b/arch/arm/mach-mediatek/Makefile
index b9b2355e03..6129ac88ab 100644
--- a/arch/arm/mach-mediatek/Makefile
+++ b/arch/arm/mach-mediatek/Makefile
@@ -3,6 +3,7 @@
 obj-y	+= cpu.o
 obj-$(CONFIG_SPL_BUILD)	+= spl.o
 
+obj-$(CONFIG_MT8512) += mt8512/
 obj-$(CONFIG_TARGET_MT7623) += mt7623/
 obj-$(CONFIG_TARGET_MT7629) += mt7629/
 obj-$(CONFIG_TARGET_MT8516) += mt8516/
diff --git a/arch/arm/mach-mediatek/mt8512/Makefile b/arch/arm/mach-mediatek/mt8512/Makefile
new file mode 100644
index 0000000000..007eb4a367
--- /dev/null
+++ b/arch/arm/mach-mediatek/mt8512/Makefile
@@ -0,0 +1,4 @@
+# SPDX-License-Identifier:	GPL-2.0
+
+obj-y += init.o
+obj-y += lowlevel_init.o
diff --git a/arch/arm/mach-mediatek/mt8512/init.c b/arch/arm/mach-mediatek/mt8512/init.c
new file mode 100644
index 0000000000..a38b5d12d9
--- /dev/null
+++ b/arch/arm/mach-mediatek/mt8512/init.c
@@ -0,0 +1,78 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Configuration for MediaTek MT8512 SoC
+ *
+ * Copyright (C) 2019 MediaTek Inc.
+ * Author: Mingming Lee <mingming.lee@mediatek.com>
+ */
+
+#include <clk.h>
+#include <common.h>
+#include <dm.h>
+#include <fdtdec.h>
+#include <ram.h>
+#include <wdt.h>
+#include <asm/arch/misc.h>
+#include <asm/armv8/mmu.h>
+#include <asm/sections.h>
+#include <dm/uclass.h>
+#include <dt-bindings/clock/mt8512-clk.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+int dram_init(void)
+{
+	return fdtdec_setup_mem_size_base();
+}
+
+phys_size_t  get_effective_memsize(void)
+{
+	/* limit stack below tee reserve memory */
+	return gd->ram_size - 6 * SZ_1M;
+}
+
+int dram_init_banksize(void)
+{
+	gd->bd->bi_dram[0].start = gd->ram_base;
+	gd->bd->bi_dram[0].size = get_effective_memsize();
+
+	return 0;
+}
+
+void reset_cpu(ulong addr)
+{
+	struct udevice *watchdog_dev = NULL;
+
+	if (uclass_get_device_by_seq(UCLASS_WDT, 0, &watchdog_dev))
+		if (uclass_get_device(UCLASS_WDT, 0, &watchdog_dev))
+			psci_system_reset();
+
+	wdt_expire_now(watchdog_dev, 0);
+}
+
+int print_cpuinfo(void)
+{
+	debug("CPU:   MediaTek MT8512\n");
+	return 0;
+}
+
+static struct mm_region mt8512_mem_map[] = {
+	{
+		/* DDR */
+		.virt = 0x40000000UL,
+		.phys = 0x40000000UL,
+		.size = 0x40000000UL,
+		.attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) | PTE_BLOCK_OUTER_SHARE,
+	}, {
+		.virt = 0x00000000UL,
+		.phys = 0x00000000UL,
+		.size = 0x40000000UL,
+		.attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
+			 PTE_BLOCK_NON_SHARE |
+			 PTE_BLOCK_PXN | PTE_BLOCK_UXN
+	}, {
+		0,
+	}
+};
+
+struct mm_region *mem_map = mt8512_mem_map;
diff --git a/arch/arm/mach-mediatek/mt8512/lowlevel_init.S b/arch/arm/mach-mediatek/mt8512/lowlevel_init.S
new file mode 100644
index 0000000000..ad392120f4
--- /dev/null
+++ b/arch/arm/mach-mediatek/mt8512/lowlevel_init.S
@@ -0,0 +1,32 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2019 MediaTek Inc.
+ * Author: Mingming Lee <mingming.lee@mediatek.com>
+ */
+
+/*
+ * Switch from AArch64 EL2 to AArch32 EL2
+ * @param inputs:
+ * x0: argument, zero
+ * x1: machine nr
+ * x2: fdt address
+ * x3: input argument
+ * x4: kernel entry point
+ * @param outputs for secure firmware:
+ * x0: function id
+ * x1: kernel entry point
+ * x2: machine nr
+ * x3: fdt address
+*/
+.global armv8_el2_to_aarch32
+armv8_el2_to_aarch32:
+	mov     x3, x2
+	mov     x2, x1
+	mov     x1, x4
+	mov	x4, #0
+	/* Define in src\bsp\trustzone\atf\v1.2\ */
+	/* mt8xxx\plat\mediatek\common\sip_svc.h */
+	/* MTK_SIP_KERNEL_BOOT_AARCH64 for U-BOOT-64 to KERNEL*/
+	ldr x0, =0xC2000200
+	SMC #0
+	ret