arm: mediatek: add support for MediaTek MT7981 SoC
This patch adds basic support for MediaTek MT7981 SoC.
This include the file that will initialize the SoC after boot and its
device tree.
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/arm/mach-mediatek/Kconfig b/arch/arm/mach-mediatek/Kconfig
index 82fadeb..04aa2fd 100644
--- a/arch/arm/mach-mediatek/Kconfig
+++ b/arch/arm/mach-mediatek/Kconfig
@@ -40,6 +40,15 @@
including DDR3, crypto engine, 3x3 11n/ac Wi-Fi, Gigabit Ethernet,
switch, USB3.0, PCIe, UART, SPI, I2C and PWM.
+config TARGET_MT7981
+ bool "MediaTek MT7981 SoC"
+ select ARM64
+ select CPU
+ help
+ The MediaTek MT7981 is a ARM64-based SoC with a dual-core Cortex-A53.
+ including UART, SPI, USB, NAND, SNFI, PWM, Gigabit Ethernet, I2C,
+ built-in Wi-Fi, and PCIe.
+
config TARGET_MT7986
bool "MediaTek MT7986 SoC"
select ARM64
@@ -93,6 +102,7 @@
default "mt7622" if TARGET_MT7622
default "mt7623" if TARGET_MT7623
default "mt7629" if TARGET_MT7629
+ default "mt7981" if TARGET_MT7981
default "mt7986" if TARGET_MT7986
default "mt8183" if TARGET_MT8183
default "mt8512" if TARGET_MT8512
@@ -109,6 +119,7 @@
default "mt7622" if TARGET_MT7622
default "mt7623" if TARGET_MT7623
default "mt7629" if TARGET_MT7629
+ default "mt7981" if TARGET_MT7981
default "mt7986" if TARGET_MT7986
default "mt8183" if TARGET_MT8183
default "mt8512" if TARGET_MT8512
@@ -124,7 +135,7 @@
string
default "media=nor" if TARGET_MT8518 || TARGET_MT8512 || TARGET_MT7629 || TARGET_MT7622
default "media=emmc" if TARGET_MT8516 || TARGET_MT8365 || TARGET_MT8183
- default "media=snand;nandinfo=2k+64" if TARGET_MT7986
+ default "media=snand;nandinfo=2k+64" if TARGET_MT7981 || TARGET_MT7986
default "lk=1" if TARGET_MT7623
endif
diff --git a/arch/arm/mach-mediatek/Makefile b/arch/arm/mach-mediatek/Makefile
index fe5c3a8..fc85293 100644
--- a/arch/arm/mach-mediatek/Makefile
+++ b/arch/arm/mach-mediatek/Makefile
@@ -7,6 +7,7 @@
obj-$(CONFIG_TARGET_MT7622) += mt7622/
obj-$(CONFIG_TARGET_MT7623) += mt7623/
obj-$(CONFIG_TARGET_MT7629) += mt7629/
+obj-$(CONFIG_TARGET_MT7981) += mt7981/
obj-$(CONFIG_TARGET_MT7986) += mt7986/
obj-$(CONFIG_TARGET_MT8183) += mt8183/
obj-$(CONFIG_TARGET_MT8516) += mt8516/
diff --git a/arch/arm/mach-mediatek/mt7981/Makefile b/arch/arm/mach-mediatek/mt7981/Makefile
new file mode 100644
index 0000000..007eb4a
--- /dev/null
+++ b/arch/arm/mach-mediatek/mt7981/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/mt7981/init.c b/arch/arm/mach-mediatek/mt7981/init.c
new file mode 100644
index 0000000..4f77a3d
--- /dev/null
+++ b/arch/arm/mach-mediatek/mt7981/init.c
@@ -0,0 +1,45 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2022 MediaTek Inc.
+ * Author: Sam Shih <sam.shih@mediatek.com>
+ */
+
+#include <init.h>
+#include <asm/armv8/mmu.h>
+#include <asm/system.h>
+#include <asm/global_data.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+int dram_init(void)
+{
+ gd->ram_size = get_ram_size((void *)CONFIG_SYS_SDRAM_BASE, SZ_2G);
+
+ return 0;
+}
+
+void reset_cpu(ulong addr)
+{
+ psci_system_reset();
+}
+
+static struct mm_region mt7981_mem_map[] = {
+ {
+ /* DDR */
+ .virt = 0x40000000UL,
+ .phys = 0x40000000UL,
+ .size = 0x80000000UL,
+ .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 = mt7981_mem_map;
diff --git a/arch/arm/mach-mediatek/mt7981/lowlevel_init.S b/arch/arm/mach-mediatek/mt7981/lowlevel_init.S
new file mode 100644
index 0000000..85a1cea
--- /dev/null
+++ b/arch/arm/mach-mediatek/mt7981/lowlevel_init.S
@@ -0,0 +1,32 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2022 MediaTek Inc.
+ * Author: Sam Shih <sam.shih@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
+ *
+ * [1] https://git.trustedfirmware.org/TF-A/trusted-firmware-a.git/tree/plat/mediatek/common/mtk_sip_svc.c
+*/
+
+.global armv8_el2_to_aarch32
+armv8_el2_to_aarch32:
+ mov x3, x2
+ mov x2, x1
+ mov x1, x4
+ mov x4, #0
+ ldr x0, =0x82000200 /* MTK_SIP_KERNEL_BOOT_AARCH32 */
+ SMC #0
+ ret