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https://github.com/AsahiLinux/u-boot
synced 2024-11-10 15:14:43 +00:00
arm: apple: Add initial support for Apple's M1 SoC
Add support for Apple's M1 SoC that is used in "Apple Silicon" Macs. This builds a basic U-Boot that can be used as a payload for the m1n1 boot loader being developed by the Asahi Linux project. Signed-off-by: Mark Kettenis <kettenis@openbsd.org> Reviewed-by: Simon Glass <sjg@chromium.org> [trini: Add MAINTAINERS entry]
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@ -108,6 +108,15 @@ L: uboot-snps-arc@synopsys.com
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F: doc/device-tree-bindings/mmc/snps,dw-mmc.txt
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F: drivers/mmc/snps_dw_mmc.c
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APPLE M1 SOC SUPPORT
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M: Mark Kettenis <kettenis@openbsd.org>
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S: Maintained
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F: arch/arm/include/asm/arch-m1/
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F: arch/arm/mach-apple/
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F: configs/apple_m1_defconfig
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F: drivers/iommu/apple_dart.c
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F: include/configs/apple.h
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ARM
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M: Tom Rini <trini@konsulko.com>
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S: Maintained
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@ -920,6 +920,25 @@ config ARCH_NEXELL
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select DM
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select GPIO_EXTRA_HEADER
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config ARCH_APPLE
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bool "Apple SoCs"
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select ARM64
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select BLK
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select CMD_USB
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select DM
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select DM_KEYBOARD
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select DM_SERIAL
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select DM_USB
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select DM_VIDEO
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select LINUX_KERNEL_IMAGE_HEADER
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select OF_CONTROL
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select OF_BOARD
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select POSITION_INDEPENDENT
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select USB
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imply CMD_DM
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imply CMD_GPT
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imply DISTRO_DEFAULTS
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config ARCH_OWL
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bool "Actions Semi OWL SoCs"
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select DM
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@ -2016,6 +2035,8 @@ config ISW_ENTRY_ADDR
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image headers.
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endif
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source "arch/arm/mach-apple/Kconfig"
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source "arch/arm/mach-aspeed/Kconfig"
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source "arch/arm/mach-at91/Kconfig"
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@ -55,6 +55,7 @@ PLATFORM_CPPFLAGS += $(arch-y) $(tune-y)
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# Machine directory name. This list is sorted alphanumerically
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# by CONFIG_* macro name.
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machine-$(CONFIG_ARCH_APPLE) += apple
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machine-$(CONFIG_ARCH_ASPEED) += aspeed
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machine-$(CONFIG_ARCH_AT91) += at91
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machine-$(CONFIG_ARCH_BCM283X) += bcm283x
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18
arch/arm/mach-apple/Kconfig
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18
arch/arm/mach-apple/Kconfig
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@ -0,0 +1,18 @@
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if ARCH_APPLE
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config SYS_TEXT_BASE
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default 0x00000000
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config SYS_CONFIG_NAME
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default "apple"
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config SYS_SOC
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default "m1"
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config SYS_MALLOC_LEN
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default 0x4000000
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config SYS_MALLOC_F_LEN
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default 0x4000
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endif
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4
arch/arm/mach-apple/Makefile
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4
arch/arm/mach-apple/Makefile
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@ -0,0 +1,4 @@
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# SPDX-License-Identifier: GPL-2.0+
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obj-y += board.o
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obj-y += lowlevel_init.o
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162
arch/arm/mach-apple/board.c
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162
arch/arm/mach-apple/board.c
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@ -0,0 +1,162 @@
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// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2021 Mark Kettenis <kettenis@openbsd.org>
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*/
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#include <common.h>
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#include <dm.h>
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#include <efi_loader.h>
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#include <asm/armv8/mmu.h>
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#include <asm/global_data.h>
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#include <asm/io.h>
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#include <asm/system.h>
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DECLARE_GLOBAL_DATA_PTR;
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static struct mm_region apple_mem_map[] = {
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{
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/* I/O */
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.virt = 0x200000000,
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.phys = 0x200000000,
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.size = 8UL * SZ_1G,
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.attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
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PTE_BLOCK_NON_SHARE |
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PTE_BLOCK_PXN | PTE_BLOCK_UXN
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}, {
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/* I/O */
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.virt = 0x500000000,
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.phys = 0x500000000,
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.size = 2UL * SZ_1G,
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.attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
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PTE_BLOCK_NON_SHARE |
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PTE_BLOCK_PXN | PTE_BLOCK_UXN
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}, {
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/* I/O */
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.virt = 0x680000000,
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.phys = 0x680000000,
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.size = SZ_512M,
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.attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
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PTE_BLOCK_NON_SHARE |
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PTE_BLOCK_PXN | PTE_BLOCK_UXN
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}, {
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/* PCIE */
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.virt = 0x6a0000000,
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.phys = 0x6a0000000,
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.size = SZ_512M,
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.attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRE) |
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PTE_BLOCK_INNER_SHARE |
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PTE_BLOCK_PXN | PTE_BLOCK_UXN
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}, {
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/* PCIE */
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.virt = 0x6c0000000,
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.phys = 0x6c0000000,
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.size = SZ_1G,
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.attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRE) |
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PTE_BLOCK_INNER_SHARE |
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PTE_BLOCK_PXN | PTE_BLOCK_UXN
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}, {
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/* RAM */
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.virt = 0x800000000,
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.phys = 0x800000000,
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.size = 8UL * SZ_1G,
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.attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
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PTE_BLOCK_INNER_SHARE
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}, {
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/* Empty entry for framebuffer */
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0,
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}, {
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/* List terminator */
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0,
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}
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};
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struct mm_region *mem_map = apple_mem_map;
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int board_init(void)
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{
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return 0;
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}
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int dram_init(void)
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{
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ofnode node;
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int index, ret;
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fdt_addr_t base;
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fdt_size_t size;
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ret = fdtdec_setup_mem_size_base();
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if (ret)
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return ret;
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/* Update RAM mapping */
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index = ARRAY_SIZE(apple_mem_map) - 3;
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apple_mem_map[index].virt = gd->ram_base;
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apple_mem_map[index].phys = gd->ram_base;
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apple_mem_map[index].size = gd->ram_size;
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node = ofnode_path("/chosen/framebuffer");
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if (!ofnode_valid(node))
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return 0;
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base = ofnode_get_addr_size(node, "reg", &size);
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if (base == FDT_ADDR_T_NONE)
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return 0;
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/* Add framebuffer mapping */
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index = ARRAY_SIZE(apple_mem_map) - 2;
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apple_mem_map[index].virt = base;
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apple_mem_map[index].phys = base;
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apple_mem_map[index].size = size;
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apple_mem_map[index].attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL_NC) |
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PTE_BLOCK_INNER_SHARE | PTE_BLOCK_PXN | PTE_BLOCK_UXN;
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return 0;
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}
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int dram_init_banksize(void)
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{
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return fdtdec_setup_memory_banksize();
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}
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#define APPLE_WDT_BASE 0x23d2b0000ULL
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#define APPLE_WDT_SYS_CTL_ENABLE BIT(2)
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typedef struct apple_wdt {
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u32 reserved0[3];
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u32 chip_ctl;
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u32 sys_tmr;
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u32 sys_cmp;
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u32 reserved1;
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u32 sys_ctl;
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} apple_wdt_t;
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void reset_cpu(void)
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{
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apple_wdt_t *wdt = (apple_wdt_t *)APPLE_WDT_BASE;
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writel(0, &wdt->sys_cmp);
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writel(APPLE_WDT_SYS_CTL_ENABLE, &wdt->sys_ctl);
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while(1)
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wfi();
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}
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extern long fw_dtb_pointer;
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void *board_fdt_blob_setup(int *err)
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{
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/* Return DTB pointer passed by m1n1 */
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*err = 0;
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return (void *)fw_dtb_pointer;
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}
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ulong board_get_usable_ram_top(ulong total_size)
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{
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/*
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* Top part of RAM is used by firmware for things like the
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* framebuffer. This gives us plenty of room to play with.
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*/
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return 0x980000000;
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}
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17
arch/arm/mach-apple/lowlevel_init.S
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17
arch/arm/mach-apple/lowlevel_init.S
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@ -0,0 +1,17 @@
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/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* (C) Copyright 2021 Mark Kettenis <kettenis@openbsd.org>
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*/
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.align 8
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.global fw_dtb_pointer
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fw_dtb_pointer:
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.quad 0
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.global save_boot_params
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save_boot_params:
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/* Stash DTB pointer passed by m1n1 */
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adr x1, fw_dtb_pointer
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str x0, [x1]
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b save_boot_params_ret
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15
configs/apple_m1_defconfig
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15
configs/apple_m1_defconfig
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CONFIG_ARM=y
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CONFIG_ARCH_APPLE=y
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# CONFIG_DISPLAY_CPUINFO is not set
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# CONFIG_MMC is not set
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# CONFIG_NET is not set
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CONFIG_VIDEO_SIMPLE=y
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CONFIG_DISPLAY_BOARDINFO_LATE=y
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CONFIG_USB_XHCI_HCD=y
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CONFIG_USB_XHCI_DWC3=y
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CONFIG_USB_KEYBOARD=y
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CONFIG_USB_STORAGE=y
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CONFIG_USE_PREBOOT=y
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CONFIG_PREBOOT="usb start"
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CONFIG_SYS_LOAD_ADDR=0x880000000
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# CONFIG_GENERATE_SMBIOS_TABLE is not set
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36
include/configs/apple.h
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36
include/configs/apple.h
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#ifndef __CONFIG_H
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#define __CONFIG_H
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#include <linux/sizes.h>
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#define CONFIG_SYS_SDRAM_BASE 0x880000000
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#define CONFIG_LNX_KRNL_IMG_TEXT_OFFSET_BASE CONFIG_SYS_TEXT_BASE
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/* Environment */
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#define ENV_DEVICE_SETTINGS \
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"stdin=serial,usbkbd\0" \
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"stdout=serial,vidconsole\0" \
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"stderr=serial,vidconsole\0"
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#define ENV_MEM_LAYOUT_SETTINGS \
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"fdt_addr_r=0x960100000\0" \
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"kernel_addr_r=0x960200000\0"
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#if CONFIG_IS_ENABLED(CMD_USB)
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#define BOOT_TARGET_USB(func) func(USB, usb, 0)
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#else
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#define BOOT_TARGET_USB(func)
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#endif
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#define BOOT_TARGET_DEVICES(func) \
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BOOT_TARGET_USB(func)
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#include <config_distro_bootcmd.h>
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#define CONFIG_EXTRA_ENV_SETTINGS \
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ENV_DEVICE_SETTINGS \
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ENV_MEM_LAYOUT_SETTINGS \
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BOOTENV
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#endif
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