feat(ast2700): add Aspeed AST2700 platform support

Aspeed AST2700 is a quad-core SoC with ARM Cortex-A35 integrated.
This patch adds the initial platform support for AST2700 and also
updates the documents.

Change-Id: I1796f7aae5ed2d1799e91fabb8949607959cd9b3
Signed-off-by: Chia-Wei Wang <chiawei_wang@aspeedtech.com>

changelog.yaml

@@ -244,6 +244,13 @@ subsections:
           - title: Corstone-1000
             scope: corstone-1000
 
+      - title: Aspeed
+        scope: aspeed
+
+        subsections:
+          - title: AST2700
+            scope: ast2700
+
       - title: Broadcom
         scope: brcm
 

docs/about/maintainers.rst

@@ -527,6 +527,15 @@ Arm Total Compute platform port
 :|G|: `rupsin01`_
 :|F|: plat/arm/board/tc
 
+Aspeed platform port
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+:|M|: Chia-Wei Wang <chiawei_wang@aspeedtech.com>
+:|G|: `ChiaweiW`_
+:|M|: Neal Liu <neal_liu@aspeedtech.com>
+:|G|: `Neal-liu`_
+:|F|: docs/plat/ast2700.rst
+:|F|: plat/aspeed/
+
 HiSilicon HiKey and HiKey960 platform ports
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 :|M|: Haojian Zhuang <haojian.zhuang@linaro.org>
@@ -983,3 +992,5 @@ Conventional Changelog Extensions
 .. _bytefire: https://github.com/bytefire
 .. _rupsin01: https://github.com/rupsin01
 .. _jimmy-brisson: https://github.com/theotherjimmy
+.. _ChiaweiW: https://github.com/chiaweiw
+.. _Neal-liu: https://github.com/neal-liu

docs/plat/ast2700.rst

@@ -0,0 +1,17 @@
+Aspeed AST2700
+==============
+
+Aspeed AST2700 is a 64-bit ARM SoC with 4-cores Cortex-A35 integrated.
+Each core operates at 1.6GHz.
+
+Boot Flow
+---------
+
+    BootRom --> BL1/BL2 --> TF-A BL31 --> BL32 (optional) --> BL33 --> Linux Kernel
+
+How to build
+------------
+
+.. code:: shell
+
+    make CROSS_COMPILE=aarch64-linux-gnu- PLAT=ast2700

docs/plat/index.rst

@@ -8,6 +8,7 @@ Platform Ports
 
    allwinner
    arm/index
+   ast2700
    meson-axg
    meson-gxbb
    meson-gxl

plat/aspeed/ast2700/include/plat_macros.S

@@ -0,0 +1,21 @@
+/*
+ * Copyright (c) 2023, Aspeed Technology Inc.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef PLAT_MACROS_S
+#define PLAT_MACROS_S
+
+	/* ---------------------------------------------
+	 * The below required platform porting macro
+	 * prints out relevant platform registers
+	 * whenever an unhandled exception is taken in
+	 * BL31.
+	 * Clobbers: x0 - x10, x16, x17, sp
+	 * ---------------------------------------------
+	 */
+	.macro plat_crash_print_regs
+	.endm
+
+#endif /* PLAT_MACROS_S */

plat/aspeed/ast2700/include/platform_def.h

@@ -0,0 +1,58 @@
+/*
+ * Copyright (c) 2023, Aspeed Technology Inc.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef PLATFORM_DEF_H
+#define PLATFORM_DEF_H
+
+#include <arch.h>
+#include <plat/common/common_def.h>
+#include <platform_reg.h>
+
+#define PLATFORM_STACK_SIZE		UL(0x1000)
+
+/* cpu topology */
+#define PLATFORM_SYSTEM_COUNT		U(1)
+#define PLATFORM_CLUSTER_COUNT		U(1)
+#define PLATFORM_CORE_PRIMARY		U(0)
+#define PLATFORM_CORE_COUNT_PER_CLUSTER U(4)
+#define PLATFORM_CORE_COUNT		(PLATFORM_CLUSTER_COUNT * \
+					 PLATFORM_CORE_COUNT_PER_CLUSTER)
+
+/* arch timer */
+#define PLAT_SYSCNT_CLKIN_HZ		U(1600000000)
+
+/* power domain */
+#define PLAT_MAX_PWR_LVL		U(1)
+#define PLAT_NUM_PWR_DOMAINS		U(5)
+#define PLAT_MAX_RET_STATE		U(1)
+#define PLAT_MAX_OFF_STATE		U(2)
+
+/* cache line size */
+#define CACHE_WRITEBACK_SHIFT		U(6)
+#define CACHE_WRITEBACK_GRANULE		(U(1) << CACHE_WRITEBACK_SHIFT)
+
+/* translation tables */
+#define PLAT_PHY_ADDR_SPACE_SIZE	(ULL(1) << 36)
+#define PLAT_VIRT_ADDR_SPACE_SIZE	(ULL(1) << 40)
+#define MAX_XLAT_TABLES			U(8)
+#define MAX_MMAP_REGIONS		U(32)
+
+/* BL31 region */
+#define BL31_BASE			ULL(0x400000000)
+#define BL31_SIZE			ULL(0x400000)
+#define BL31_LIMIT			(BL31_BASE + BL31_SIZE)
+
+/* BL32 region */
+#define BL32_BASE			BL31_LIMIT
+#define BL32_SIZE			ULL(0x400000)
+#define BL32_LIMIT			(BL32_BASE + BL32_SIZE)
+
+/* console */
+#define CONSOLE_UART_BASE		UART12_BASE
+#define CONSOLE_UART_CLKIN_HZ		U(1846153)
+#define CONSOLE_UART_BAUDRATE		U(115200)
+
+#endif /* PLATFORM_DEF_H */

plat/aspeed/ast2700/include/platform_reg.h

@@ -0,0 +1,28 @@
+/*
+ * Copyright (c) 2023, Aspeed Technology Inc.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef PLATFORM_REG_H
+#define PLATFORM_REG_H
+
+/* GIC */
+#define GICD_BASE	U(0x12200000)
+#define GICD_SIZE	U(0x10000)
+#define GICR_BASE	U(0x12280000)
+#define GICR_SIZE	U(0x100000)
+
+/* UART */
+#define UART_BASE	U(0x14c33000)
+#define UART12_BASE	(UART_BASE + 0xb00)
+
+/* CPU-die SCU */
+#define SCU_CPU_BASE		U(0x12c02000)
+#define SCU_CPU_SMP_READY	(SCU_CPU_BASE + 0x780)
+#define SCU_CPU_SMP_EP1		(SCU_CPU_BASE + 0x788)
+#define SCU_CPU_SMP_EP2		(SCU_CPU_BASE + 0x790)
+#define SCU_CPU_SMP_EP3		(SCU_CPU_BASE + 0x798)
+#define SCU_CPU_SMP_POLLINSN	(SCU_CPU_BASE + 0x7a0)
+
+#endif /* PLATFORM_REG_H */

plat/aspeed/ast2700/plat_bl31_setup.c

@@ -0,0 +1,100 @@
+/*
+ * Copyright (c) 2023, Aspeed Technology Inc.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <arch.h>
+#include <common/debug.h>
+#include <common/desc_image_load.h>
+#include <drivers/arm/gicv3.h>
+#include <drivers/console.h>
+#include <drivers/ti/uart/uart_16550.h>
+#include <lib/xlat_tables/xlat_tables_v2.h>
+#include <plat/common/platform.h>
+#include <platform_def.h>
+
+static console_t console;
+
+static entry_point_info_t bl32_ep_info;
+static entry_point_info_t bl33_ep_info;
+
+static uintptr_t rdistif_base_addrs[PLATFORM_CORE_COUNT];
+
+static unsigned int plat_mpidr_to_core_pos(u_register_t mpidr)
+{
+	/* to workaround the return type mismatch */
+	return plat_core_pos_by_mpidr(mpidr);
+}
+
+static const gicv3_driver_data_t plat_gic_data = {
+	.gicd_base = GICD_BASE,
+	.gicr_base = GICR_BASE,
+	.rdistif_num = PLATFORM_CORE_COUNT,
+	.rdistif_base_addrs = rdistif_base_addrs,
+	.mpidr_to_core_pos = plat_mpidr_to_core_pos,
+};
+
+static const mmap_region_t plat_mmap[] = {
+	MAP_REGION_FLAT(GICD_BASE, GICD_SIZE,
+			MT_DEVICE | MT_RW | MT_SECURE),
+	MAP_REGION_FLAT(GICR_BASE, GICR_SIZE,
+			MT_DEVICE | MT_RW | MT_SECURE),
+	MAP_REGION_FLAT(UART_BASE, PAGE_SIZE,
+			MT_DEVICE | MT_RW | MT_SECURE),
+	MAP_REGION_FLAT(SCU_CPU_BASE, PAGE_SIZE,
+			MT_DEVICE | MT_RW | MT_SECURE),
+	{ 0 }
+};
+
+void bl31_early_platform_setup2(u_register_t arg0, u_register_t arg1,
+				u_register_t arg2, u_register_t arg3)
+{
+	console_16550_register(CONSOLE_UART_BASE, CONSOLE_UART_CLKIN_HZ,
+			       CONSOLE_UART_BAUDRATE, &console);
+
+	console_set_scope(&console, CONSOLE_FLAG_BOOT | CONSOLE_FLAG_RUNTIME | CONSOLE_FLAG_CRASH);
+
+	bl31_params_parse_helper(arg0, &bl32_ep_info, &bl33_ep_info);
+}
+
+void bl31_plat_arch_setup(void)
+{
+	mmap_add_region(BL_CODE_BASE, BL_CODE_BASE,
+			BL_CODE_END - BL_CODE_BASE,
+			MT_CODE | MT_SECURE);
+
+	mmap_add_region(BL_CODE_END, BL_CODE_END,
+			BL_END - BL_CODE_END,
+			MT_RW_DATA | MT_SECURE);
+
+	mmap_add_region(BL32_BASE, BL32_BASE, BL32_SIZE,
+			MT_MEMORY | MT_RW);
+
+	mmap_add(plat_mmap);
+
+	init_xlat_tables();
+
+	enable_mmu_el3(0);
+}
+
+void bl31_platform_setup(void)
+{
+	gicv3_driver_init(&plat_gic_data);
+	gicv3_distif_init();
+	gicv3_rdistif_init(plat_my_core_pos());
+	gicv3_cpuif_enable(plat_my_core_pos());
+}
+
+entry_point_info_t *bl31_plat_get_next_image_ep_info(uint32_t type)
+{
+	entry_point_info_t *ep_info;
+
+	ep_info = (type == NON_SECURE) ? &bl33_ep_info : &bl32_ep_info;
+
+	if (!ep_info->pc) {
+		return NULL;
+	}
+
+	return ep_info;
+}

plat/aspeed/ast2700/plat_helpers.S

@@ -0,0 +1,64 @@
+/*
+ * Copyright (c) 2023, Aspeed Technology Inc.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <asm_macros.S>
+#include <assert_macros.S>
+#include <arch.h>
+#include <cortex_a35.h>
+#include <platform_def.h>
+
+	.globl	plat_is_my_cpu_primary
+	.globl	plat_my_core_pos
+	.globl	plat_secondary_cold_boot_setup
+	.globl	plat_get_syscnt_freq2
+	.globl	plat_crash_console_init
+	.globl	plat_crash_console_putc
+	.globl	plat_crash_console_flush
+
+/* unsigned int plat_is_my_cpu_primary(void); */
+func plat_is_my_cpu_primary
+	mrs	x0, mpidr_el1
+	and	x0, x0, #(MPIDR_CLUSTER_MASK | MPIDR_CPU_MASK)
+	cmp	x0, #PLATFORM_CORE_PRIMARY
+	cset	w0, eq
+	ret
+endfunc plat_is_my_cpu_primary
+
+/* unsigned int plat_my_core_pos(void); */
+func plat_my_core_pos
+	mrs	x0, mpidr_el1
+	mov	x2, #PLATFORM_CORE_COUNT_PER_CLUSTER
+	and	x1, x0, #MPIDR_CPU_MASK
+	and	x0, x0, #MPIDR_CLUSTER_MASK
+	madd	x0, x0, x2, x1
+	ret
+endfunc plat_my_core_pos
+
+/* unsigned int plat_get_syscnt_freq2(void); */
+func plat_get_syscnt_freq2
+	mov_imm	w0, PLAT_SYSCNT_CLKIN_HZ
+	ret
+endfunc plat_get_syscnt_freq2
+
+/* int plat_crash_console_init(void); */
+func plat_crash_console_init
+	mov_imm	x0, CONSOLE_UART_BASE
+	mov_imm	x1, CONSOLE_UART_CLKIN_HZ
+	mov_imm	x2, CONSOLE_UART_BAUDRATE
+	b	console_16550_core_init
+endfunc plat_crash_console_init
+
+/* int plat_crash_console_putc(int); */
+func plat_crash_console_putc
+	mov_imm	x1, CONSOLE_UART_BASE
+	b	console_16550_core_putc
+endfunc plat_crash_console_putc
+
+/* void plat_crash_console_flush(void); */
+func plat_crash_console_flush
+	mov_imm	x0, CONSOLE_UART_BASE
+	b	console_16550_core_flush
+endfunc plat_crash_console_flush