Hi Mark, On Sun, Sep 19, 2021 at 9:04 AM Bin Meng <bmeng...@gmail.com> wrote: > > Hi Mark, > > On Sat, Sep 18, 2021 at 9:55 PM Mark Kettenis <kette...@openbsd.org> wrote: > > > > 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 <kette...@openbsd.org> > > --- > > arch/arm/Kconfig | 22 ++++ > > arch/arm/Makefile | 1 + > > arch/arm/mach-apple/Kconfig | 18 ++++ > > arch/arm/mach-apple/Makefile | 4 + > > arch/arm/mach-apple/board.c | 158 ++++++++++++++++++++++++++++ > > arch/arm/mach-apple/lowlevel_init.S | 16 +++ > > configs/apple_m1_defconfig | 14 +++ > > include/configs/apple.h | 38 +++++++ > > 8 files changed, 271 insertions(+) > > create mode 100644 arch/arm/mach-apple/Kconfig > > create mode 100644 arch/arm/mach-apple/Makefile > > create mode 100644 arch/arm/mach-apple/board.c > > create mode 100644 arch/arm/mach-apple/lowlevel_init.S > > create mode 100644 configs/apple_m1_defconfig > > create mode 100644 include/configs/apple.h > > > > diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig > > index b5bd3284cd..7cdea1f615 100644 > > --- a/arch/arm/Kconfig > > +++ b/arch/arm/Kconfig > > @@ -895,6 +895,26 @@ config ARCH_NEXELL > > select DM > > select GPIO_EXTRA_HEADER > > > > +config ARCH_APPLE > > + bool "Apple SoCs" > > + select ARM64 > > + select LINUX_KERNEL_IMAGE_HEADER > > + select POSITION_INDEPENDENT > > + select BLK > > + select DM > > + select DM_KEYBOARD > > + select DM_SERIAL > > + select DM_USB > > + select DM_VIDEO > > + select CMD_USB > > + select MISC > > + select OF_CONTROL > > + select OF_BOARD > > + select USB > > + imply CMD_DM > > + imply CMD_GPT > > + imply DISTRO_DEFAULTS > > + > > config ARCH_OWL > > bool "Actions Semi OWL SoCs" > > select DM > > @@ -1932,6 +1952,8 @@ config ISW_ENTRY_ADDR > > image headers. > > endif > > > > +source "arch/arm/mach-apple/Kconfig" > > + > > source "arch/arm/mach-aspeed/Kconfig" > > > > source "arch/arm/mach-at91/Kconfig" > > diff --git a/arch/arm/Makefile b/arch/arm/Makefile > > index c68e598a67..44178c204b 100644 > > --- a/arch/arm/Makefile > > +++ b/arch/arm/Makefile > > @@ -51,6 +51,7 @@ PLATFORM_CPPFLAGS += $(arch-y) $(tune-y) > > > > # Machine directory name. This list is sorted alphanumerically > > # by CONFIG_* macro name. > > +machine-$(CONFIG_ARCH_APPLE) += apple > > machine-$(CONFIG_ARCH_ASPEED) += aspeed > > machine-$(CONFIG_ARCH_AT91) += at91 > > machine-$(CONFIG_ARCH_BCM283X) += bcm283x > > diff --git a/arch/arm/mach-apple/Kconfig b/arch/arm/mach-apple/Kconfig > > new file mode 100644 > > index 0000000000..66cab91b2a > > --- /dev/null > > +++ b/arch/arm/mach-apple/Kconfig > > @@ -0,0 +1,18 @@ > > +if ARCH_APPLE > > + > > +config SYS_TEXT_BASE > > + default 0x00000000 > > + > > +config SYS_CONFIG_NAME > > + default "apple" > > + > > +config SYS_SOC > > + default "m1" > > + > > +config SYS_MALLOC_LEN > > + default 0x4000000 > > + > > +config SYS_MALLOC_F_LEN > > + default 0x4000 > > + > > +endif > > diff --git a/arch/arm/mach-apple/Makefile b/arch/arm/mach-apple/Makefile > > new file mode 100644 > > index 0000000000..e74a8c9df1 > > --- /dev/null > > +++ b/arch/arm/mach-apple/Makefile > > @@ -0,0 +1,4 @@ > > +# SPDX-License-Identifier: GPL-2.0+ > > + > > +obj-y += board.o > > +obj-y += lowlevel_init.o > > diff --git a/arch/arm/mach-apple/board.c b/arch/arm/mach-apple/board.c > > new file mode 100644 > > index 0000000000..0c8b35292e > > --- /dev/null > > +++ b/arch/arm/mach-apple/board.c > > @@ -0,0 +1,158 @@ > > +// SPDX-License-Identifier: GPL-2.0+ > > +/* > > + * (C) Copyright 2021 Mark Kettenis <kette...@openbsd.org> > > + */ > > + > > +#include <common.h> > > +#include <efi_loader.h> > > + > > +#include <asm/armv8/mmu.h> > > +#include <asm/global_data.h> > > +#include <asm/io.h> > > +#include <asm/system.h> > > + > > +DECLARE_GLOBAL_DATA_PTR; > > + > > +static struct mm_region apple_mem_map[] = { > > + { > > + /* I/O */ > > + .virt = 0x200000000, > > + .phys = 0x200000000, > > + .size = 8UL * SZ_1G, > > + .attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) | > > + PTE_BLOCK_NON_SHARE | > > + PTE_BLOCK_PXN | PTE_BLOCK_UXN > > + }, { > > + /* I/O */ > > + .virt = 0x500000000, > > + .phys = 0x500000000, > > + .size = 2UL * SZ_1G, > > + .attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) | > > + PTE_BLOCK_NON_SHARE | > > + PTE_BLOCK_PXN | PTE_BLOCK_UXN > > + }, { > > + /* I/O */ > > + .virt = 0x680000000, > > + .phys = 0x680000000, > > + .size = SZ_512M, > > + .attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) | > > + PTE_BLOCK_NON_SHARE | > > + PTE_BLOCK_PXN | PTE_BLOCK_UXN > > + }, { > > + /* PCIE */ > > + .virt = 0x6a0000000, > > + .phys = 0x6a0000000, > > + .size = SZ_512M, > > + .attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRE) | > > + PTE_BLOCK_INNER_SHARE | > > + PTE_BLOCK_PXN | PTE_BLOCK_UXN > > + }, { > > + /* PCIE */ > > + .virt = 0x6c0000000, > > + .phys = 0x6c0000000, > > + .size = SZ_1G, > > + .attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRE) | > > + PTE_BLOCK_INNER_SHARE | > > + PTE_BLOCK_PXN | PTE_BLOCK_UXN > > + }, { > > + /* RAM */ > > + .virt = 0x800000000, > > + .phys = 0x800000000, > > + .size = 8UL * SZ_1G, > > + .attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) | > > + PTE_BLOCK_INNER_SHARE > > + }, { > > + /* Empty entry for framebuffer */ > > + 0, > > + }, { > > + /* List terminator */ > > + 0, > > + } > > +}; > > + > > +struct mm_region *mem_map = apple_mem_map; > > + > > +int board_init(void) > > +{ > > + return 0; > > +} > > + > > +int dram_init(void) > > +{ > > + int index, node, ret; > > + fdt_addr_t base; > > + fdt_size_t size; > > + > > + ret = fdtdec_setup_mem_size_base(); > > + if (ret) > > + return ret; > > + > > + /* Update RAM mapping. */ > > nits: please remove the ending . > > > + index = ARRAY_SIZE(apple_mem_map) - 3;
This is error prone. Someone else updating apple_mem_map may create an incorrect index for us. > > + apple_mem_map[index].virt = gd->ram_base; > > + apple_mem_map[index].phys = gd->ram_base; > > + apple_mem_map[index].size = gd->ram_size; > > + > > + node = fdt_path_offset(gd->fdt_blob, "/chosen/framebuffer"); > > + if (node < 0) > > + return 0; > > + > > + base = fdtdec_get_addr_size(gd->fdt_blob, node, "reg", &size); > > + if (base == FDT_ADDR_T_NONE) > > + return 0; > > + > > + /* Add framebuffer mapping. */ > > ditto > > > + index = ARRAY_SIZE(apple_mem_map) - 2; > > + apple_mem_map[index].virt = base; > > + apple_mem_map[index].phys = base; > > + apple_mem_map[index].size = size; > > + apple_mem_map[index].attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL_NC) | > > + PTE_BLOCK_INNER_SHARE | PTE_BLOCK_PXN | PTE_BLOCK_UXN; > > + > > + return 0; > > +} > > + > > +int dram_init_banksize(void) > > +{ > > + return fdtdec_setup_memory_banksize(); > > +} > > + > > +#define APPLE_WDT_BASE 0x23d2b0000ULL > > + > > +#define APPLE_WDT_SYS_CTL_ENABLE BIT(2) > > + > > +typedef struct apple_wdt { > > + u32 reserved0[3]; > > + u32 chip_ctl; > > + u32 sys_tmr; > > + u32 sys_cmp; > > + u32 reserved1; > > + u32 sys_ctl; > > +} apple_wdt_t; > > + > > +void reset_cpu(void) > > This looks like we should add a new sysreset driver for Apple Arm SoC. > > > +{ > > + apple_wdt_t *wdt = (apple_wdt_t *)APPLE_WDT_BASE; > > + > > + writel(0, &wdt->sys_cmp); > > + writel(APPLE_WDT_SYS_CTL_ENABLE, &wdt->sys_ctl); > > + > > + while(1) > > + wfi(); > > +} > > + > > +extern long fw_dtb_pointer; > > + > > +void *board_fdt_blob_setup(void) > > +{ > > + return (void *)fw_dtb_pointer; > > +} > > + > > +ulong board_get_usable_ram_top(ulong total_size) > > +{ > > + /* > > + * Top part of RAM is used by firmware for things like the > > + * framebuffer. This gives us plenty of room to play with. > > + */ > > + return 0x980000000; > > +} > > diff --git a/arch/arm/mach-apple/lowlevel_init.S > > b/arch/arm/mach-apple/lowlevel_init.S > > new file mode 100644 > > index 0000000000..0f5313163e > > --- /dev/null > > +++ b/arch/arm/mach-apple/lowlevel_init.S > > @@ -0,0 +1,16 @@ > > +/* SPDX-License-Identifier: GPL-2.0+ */ > > +/* > > + * (C) Copyright 2021 Mark Kettenis <kette...@openbsd.org> > > + */ > > + > > +.align 8 > > +.global fw_dtb_pointer > > +fw_dtb_pointer: > > + .quad 0 > > Is this filled in by m1n1? Sorry I misread, so this is passed by m1n1 and filled in by U-Boot. I think we should stop using CONFIG_OF_BOARD, and for such case we should use CONFIG_OF_PRIOR_STAGE. > > > + > > +.global save_boot_params > > +save_boot_params: > > + adr x1, fw_dtb_pointer > > + str x0, [x1] > > + > > + b save_boot_params_ret Regards, Bin