This patch adds Kbuild, Makefile, Kconfig and link script for LoongArch build infrastructure. Signed-off-by: Huacai Chen <chenhuacai@xxxxxxxxxxx> --- arch/loongarch/.gitignore | 11 + arch/loongarch/Kbuild | 21 ++ arch/loongarch/Kbuild.platforms | 6 + arch/loongarch/Kconfig | 403 +++++++++++++++++++++++++ arch/loongarch/Kconfig.debug | 0 arch/loongarch/Makefile | 121 ++++++++ arch/loongarch/include/asm/Kbuild | 30 ++ arch/loongarch/include/uapi/asm/Kbuild | 2 + arch/loongarch/kernel/Makefile | 24 ++ arch/loongarch/kernel/vmlinux.lds.S | 112 +++++++ arch/loongarch/lib/Makefile | 7 + arch/loongarch/loongson64/Makefile | 8 + arch/loongarch/loongson64/Platform | 14 + arch/loongarch/mm/Makefile | 10 + arch/loongarch/pci/Makefile | 9 + scripts/subarch.include | 2 +- 16 files changed, 779 insertions(+), 1 deletion(-) create mode 100644 arch/loongarch/.gitignore create mode 100644 arch/loongarch/Kbuild create mode 100644 arch/loongarch/Kbuild.platforms create mode 100644 arch/loongarch/Kconfig create mode 100644 arch/loongarch/Kconfig.debug create mode 100644 arch/loongarch/Makefile create mode 100644 arch/loongarch/include/asm/Kbuild create mode 100644 arch/loongarch/include/uapi/asm/Kbuild create mode 100644 arch/loongarch/kernel/Makefile create mode 100644 arch/loongarch/kernel/vmlinux.lds.S create mode 100644 arch/loongarch/lib/Makefile create mode 100644 arch/loongarch/loongson64/Makefile create mode 100644 arch/loongarch/loongson64/Platform create mode 100644 arch/loongarch/mm/Makefile create mode 100644 arch/loongarch/pci/Makefile diff --git a/arch/loongarch/.gitignore b/arch/loongarch/.gitignore new file mode 100644 index 000000000000..7e6b000a7f3e --- /dev/null +++ b/arch/loongarch/.gitignore @@ -0,0 +1,11 @@ +*.lds +*.raw +calc_vmlinuz_load_addr +elf-entry +relocs +vmlinux.* +vmlinuz.* +vdso/genvdso +vdso/vdso-image.c + +!kernel/vmlinux.lds.S diff --git a/arch/loongarch/Kbuild b/arch/loongarch/Kbuild new file mode 100644 index 000000000000..e997ba117bd9 --- /dev/null +++ b/arch/loongarch/Kbuild @@ -0,0 +1,21 @@ +# Fail on warnings - also for files referenced in subdirs +# -Werror can be disabled for specific files using: +# CFLAGS_<file.o> := -Wno-error +ifeq ($(W),) +subdir-ccflags-y := -Werror +endif + +# platform specific definitions +include arch/loongarch/Kbuild.platforms +obj-y := $(platform-y) + +# make clean traverses $(obj-) without having included .config, so +# everything ends up here +obj- := $(platform-) + +# LoongArch object files +# The object files are linked as core-y files would be linked + +obj-y += kernel/ +obj-y += mm/ +obj-y += vdso/ diff --git a/arch/loongarch/Kbuild.platforms b/arch/loongarch/Kbuild.platforms new file mode 100644 index 000000000000..ad390d5c00f2 --- /dev/null +++ b/arch/loongarch/Kbuild.platforms @@ -0,0 +1,6 @@ +# All platforms listed in alphabetic order + +platforms += loongson64 + +# include the platform specific files +include $(patsubst %, $(srctree)/arch/loongarch/%/Platform, $(platforms)) diff --git a/arch/loongarch/Kconfig b/arch/loongarch/Kconfig new file mode 100644 index 000000000000..7d5889a264c6 --- /dev/null +++ b/arch/loongarch/Kconfig @@ -0,0 +1,403 @@ +# SPDX-License-Identifier: GPL-2.0 +config LOONGARCH + bool + default y + select ACPI_SYSTEM_POWER_STATES_SUPPORT if ACPI + select ARCH_BINFMT_ELF_STATE + select ARCH_DISCARD_MEMBLOCK + select ARCH_HAS_ACPI_TABLE_UPGRADE if ACPI + select ARCH_HAS_ELF_RANDOMIZE + select ARCH_HAS_PTE_SPECIAL if !32BIT + select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST + select ARCH_INLINE_READ_LOCK if !PREEMPTION + select ARCH_INLINE_READ_LOCK_BH if !PREEMPTION + select ARCH_INLINE_READ_LOCK_IRQ if !PREEMPTION + select ARCH_INLINE_READ_LOCK_IRQSAVE if !PREEMPTION + select ARCH_INLINE_READ_UNLOCK if !PREEMPTION + select ARCH_INLINE_READ_UNLOCK_BH if !PREEMPTION + select ARCH_INLINE_READ_UNLOCK_IRQ if !PREEMPTION + select ARCH_INLINE_READ_UNLOCK_IRQRESTORE if !PREEMPTION + select ARCH_INLINE_WRITE_LOCK if !PREEMPTION + select ARCH_INLINE_WRITE_LOCK_BH if !PREEMPTION + select ARCH_INLINE_WRITE_LOCK_IRQ if !PREEMPTION + select ARCH_INLINE_WRITE_LOCK_IRQSAVE if !PREEMPTION + select ARCH_INLINE_WRITE_UNLOCK if !PREEMPTION + select ARCH_INLINE_WRITE_UNLOCK_BH if !PREEMPTION + select ARCH_INLINE_WRITE_UNLOCK_IRQ if !PREEMPTION + select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE if !PREEMPTION + select ARCH_INLINE_SPIN_TRYLOCK if !PREEMPTION + select ARCH_INLINE_SPIN_TRYLOCK_BH if !PREEMPTION + select ARCH_INLINE_SPIN_LOCK if !PREEMPTION + select ARCH_INLINE_SPIN_LOCK_BH if !PREEMPTION + select ARCH_INLINE_SPIN_LOCK_IRQ if !PREEMPTION + select ARCH_INLINE_SPIN_LOCK_IRQSAVE if !PREEMPTION + select ARCH_INLINE_SPIN_UNLOCK if !PREEMPTION + select ARCH_INLINE_SPIN_UNLOCK_BH if !PREEMPTION + select ARCH_INLINE_SPIN_UNLOCK_IRQ if !PREEMPTION + select ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE if !PREEMPTION + select ARCH_SUPPORTS_ACPI + select ARCH_SUPPORTS_HUGETLBFS + select ARCH_USE_BUILTIN_BSWAP + select ARCH_USE_CMPXCHG_LOCKREF if 64BIT + select ARCH_USE_QUEUED_RWLOCKS + select ARCH_USE_QUEUED_SPINLOCKS + select BUILDTIME_TABLE_SORT + select GENERIC_ATOMIC64 if !64BIT + select GENERIC_CLOCKEVENTS + select GENERIC_CMOS_UPDATE + select GENERIC_CPU_AUTOPROBE + select GENERIC_GETTIMEOFDAY + select GENERIC_IOMAP + select GENERIC_IRQ_PROBE + select GENERIC_IRQ_SHOW + select GENERIC_LIB_ASHLDI3 + select GENERIC_LIB_ASHRDI3 + select GENERIC_LIB_CMPDI2 + select GENERIC_LIB_LSHRDI3 + select GENERIC_LIB_UCMPDI2 + select GENERIC_TIME_VSYSCALL + select HANDLE_DOMAIN_IRQ + select HAVE_ARCH_AUDITSYSCALL + select HAVE_ARCH_COMPILER_H + select HAVE_ARCH_MMAP_RND_BITS if MMU + select HAVE_ARCH_SECCOMP_FILTER + select HAVE_ARCH_TRACEHOOK + select HAVE_ARCH_TRANSPARENT_HUGEPAGE + select HAVE_ASM_MODVERSIONS + select HAVE_CBPF_JIT if !64BIT + select HAVE_EBPF_JIT if 64BIT + select HAVE_CONTEXT_TRACKING + select HAVE_COPY_THREAD_TLS + select HAVE_DEBUG_KMEMLEAK + select HAVE_DEBUG_STACKOVERFLOW + select HAVE_DMA_CONTIGUOUS + select HAVE_EXIT_THREAD + select HAVE_FAST_GUP + select HAVE_FUTEX_CMPXCHG if FUTEX + select HAVE_GENERIC_VDSO + select HAVE_IDE + select HAVE_IOREMAP_PROT + select HAVE_IRQ_EXIT_ON_IRQ_STACK + select HAVE_IRQ_TIME_ACCOUNTING + select HAVE_MEMBLOCK + select HAVE_MEMBLOCK_NODE_MAP + select HAVE_MOD_ARCH_SPECIFIC + select HAVE_NMI + select HAVE_PERF_EVENTS + select HAVE_REGS_AND_STACK_ACCESS_API + select HAVE_RSEQ + select HAVE_SYSCALL_TRACEPOINTS + select HAVE_VIRT_CPU_ACCOUNTING_GEN if 64BIT + select IRQ_FORCED_THREADING + select MODULES_USE_ELF_RELA if MODULES && 64BIT + select MODULES_USE_ELF_REL if MODULES + select PCI_DOMAINS if PCI + select PCI_MSI_ARCH_FALLBACKS + select PERF_USE_VMALLOC + select RTC_LIB + select SYSCTL_EXCEPTION_TRACE + select VIRT_TO_BUS + +menu "Machine selection" + +choice + prompt "System type" + default MACH_LOONGSON64 + +config MACH_LOONGSON64 + bool "Loongson 64-bit family of machines" + select ARCH_SPARSEMEM_ENABLE + select ARCH_MIGHT_HAVE_PC_PARPORT + select ARCH_MIGHT_HAVE_PC_SERIO + select GENERIC_ISA_DMA + select HAVE_PCI + select ISA + select PCI + select IRQ_LOONGARCH_CPU + select NR_CPUS_DEFAULT_4 + select SPARSE_IRQ + select SYS_HAS_CPU_LOONGSON64 + select SYS_SUPPORTS_64BIT_KERNEL + select ZONE_DMA32 + help + This enables the support of Loongson 64-bit family of machines. These + machines are based on new Loongson-3 processors (Old Loongson is MIPS + compatible, while new Loongson is based on LoongArch ISA). + +endchoice + +endmenu + +config GENERIC_HWEIGHT + bool + default y + +config GENERIC_CALIBRATE_DELAY + bool + default y + +config SCHED_OMIT_FRAME_POINTER + bool + default y + +config GENERIC_CSUM + def_bool y + +config GENERIC_ISA_DMA + bool + +config L1_CACHE_SHIFT + int + default "6" + +menu "CPU selection" + +choice + prompt "CPU type" + default CPU_LOONGSON64 + +config CPU_LOONGSON64 + bool "Loongson 64-bit CPU" + depends on SYS_HAS_CPU_LOONGSON64 + select CPU_SUPPORTS_64BIT_KERNEL + select GPIOLIB + select SWIOTLB + select ARCH_SUPPORTS_ATOMIC_RMW + help + The Loongson 64-bit processor implements the LoongArch64 (the 64-bit + version of LoongArch) instruction set. + +endchoice + +config SYS_HAS_CPU_LOONGSON64 + bool + +endmenu + +config SYS_SUPPORTS_32BIT_KERNEL + bool +config SYS_SUPPORTS_64BIT_KERNEL + bool +config CPU_SUPPORTS_32BIT_KERNEL + bool +config CPU_SUPPORTS_64BIT_KERNEL + bool + +menu "Kernel type" + +choice + prompt "Kernel code model" + help + You should only select this option if you have a workload that + actually benefits from 64-bit processing or if your machine has + large memory. You will only be presented a single option in this + menu if your system does not support both 32-bit and 64-bit kernels. + +config 32BIT + bool "32-bit kernel" + depends on CPU_SUPPORTS_32BIT_KERNEL && SYS_SUPPORTS_32BIT_KERNEL + help + Select this option if you want to build a 32-bit kernel. + +config 64BIT + bool "64-bit kernel" + depends on CPU_SUPPORTS_64BIT_KERNEL && SYS_SUPPORTS_64BIT_KERNEL + help + Select this option if you want to build a 64-bit kernel. + +endchoice + +choice + prompt "Kernel page size" + default PAGE_SIZE_16KB + +config PAGE_SIZE_4KB + bool "4kB" + help + This option select the standard 4kB Linux page size. + +config PAGE_SIZE_16KB + bool "16kB" + help + This option select the standard 16kB Linux page size. + +config PAGE_SIZE_64KB + bool "64kB" + help + This option select the standard 64kB Linux page size. + +endchoice + +choice + prompt "Virtual memory address space bits" + default VA_BITS_40 + help + Allows choosing one of multiple possible virtual memory + address space bits for applications. The level of page + translation table is determined by a combination of page + size and virtual memory address space bits. + +config VA_BITS_40 + bool "40-bits" + depends on 64BIT + help + Support a maximum at least 40 bits of application virtual memory. + +config VA_BITS_48 + bool "48-bits" + depends on 64BIT + help + Support a maximum at least 48 bits of application virtual memory. + +endchoice + +config FORCE_MAX_ZONEORDER + int "Maximum zone order" + range 14 64 if PAGE_SIZE_64KB + default "14" if PAGE_SIZE_64KB + range 12 64 if PAGE_SIZE_16KB + default "12" if PAGE_SIZE_16KB + range 11 64 + default "11" + help + The kernel memory allocator divides physically contiguous memory + blocks into "zones", where each zone is a power of two number of + pages. This option selects the largest power of two that the kernel + keeps in the memory allocator. If you need to allocate very large + blocks of physically contiguous memory, then you may need to + increase this value. + + This config option is actually maximum order plus one. For example, + a value of 11 means that the largest free memory block is 2^10 pages. + + The page size is not necessarily 4KB. Keep this in mind + when choosing a value for this option. + +config CPU_HAS_PREFETCH + bool + default y + +config CPU_HAS_FPU + bool + default y + +config ARCH_SELECT_MEMORY_MODEL + def_bool y + +config ARCH_FLATMEM_ENABLE + def_bool y + +config ARCH_SPARSEMEM_ENABLE + def_bool y + select SPARSEMEM_STATIC + help + Say Y to support efficient handling of sparse physical memory, + for architectures which are either NUMA (Non-Uniform Memory Access) + or have huge holes in the physical address space for other reasons. + See <file:Documentation/vm/numa.rst> for more. + +config DMI + bool "Enable DMI scanning" + select DMI_SCAN_MACHINE_NON_EFI_FALLBACK + default y + help + Enabled scanning of DMI to identify machine quirks. Say Y + here unless you have verified that your setup is not + affected by entries in the DMI blacklist. Required by PNP + BIOS code. + +config EFI + bool "EFI runtime service support" + select UCS2_STRING + select EFI_RUNTIME_WRAPPERS + help + This enables the kernel to use EFI runtime services that are + available (such as the EFI variable services). + + This option is only useful on systems that have EFI firmware. + In addition, you should use the latest ELILO loader available + at <http://elilo.sourceforge.net> in order to take advantage + of EFI runtime services. However, even with this option, the + resultant kernel should continue to boot on existing non-EFI + platforms. + +source "kernel/Kconfig.hz" + +config SECCOMP + bool "Enable seccomp to safely compute untrusted bytecode" + depends on PROC_FS + default y + help + This kernel feature is useful for number crunching applications + that may need to compute untrusted bytecode during their + execution. By using pipes or other transports made available to + the process as file descriptors supporting the read/write + syscalls, it's possible to isolate those applications in + their own address space using seccomp. Once seccomp is + enabled via /proc/<pid>/seccomp, it cannot be disabled + and the task is only allowed to execute a few safe syscalls + defined by each seccomp mode. + + If unsure, say Y. Only embedded should say N here. + +endmenu + +config ARCH_ENABLE_MEMORY_HOTPLUG + def_bool y + depends on LOONGARCH + +config ARCH_ENABLE_MEMORY_HOTREMOVE + def_bool y + depends on MEMORY_HOTPLUG + +config ARCH_MEMORY_PROBE + def_bool y + depends on MEMORY_HOTPLUG + +config LOCKDEP_SUPPORT + bool + default y + +config PGTABLE_LEVELS + int + default 4 if PAGE_SIZE_4KB && VA_BITS_48 + default 2 if PAGE_SIZE_64KB && VA_BITS_40 + default 3 + +config MMU + bool + default y + +config ARCH_MMAP_RND_BITS_MIN + default 12 if 64BIT + default 8 + +config ARCH_MMAP_RND_BITS_MAX + default 18 if 64BIT + default 15 + +config ZONE_DMA + bool + +config ZONE_DMA32 + bool + +menu "Bus options" + +config ISA + bool + +config PCI_MMCONFIG + bool + default y + depends on PCI && ACPI + +endmenu + +menu "Power management options" + +source "drivers/acpi/Kconfig" + +endmenu + +source "drivers/firmware/Kconfig" diff --git a/arch/loongarch/Kconfig.debug b/arch/loongarch/Kconfig.debug new file mode 100644 index 000000000000..e69de29bb2d1 diff --git a/arch/loongarch/Makefile b/arch/loongarch/Makefile new file mode 100644 index 000000000000..d339049e9022 --- /dev/null +++ b/arch/loongarch/Makefile @@ -0,0 +1,121 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# Author: Huacai Chen <chenhuacai@xxxxxxxxxxx> +# Copyright (C) 2020-2021 Loongson Technology Corporation Limited + +# +# Select the object file format to substitute into the linker script. +# +64bit-tool-archpref = loongarch64 +32bit-bfd = elf32-loongarch +64bit-bfd = elf64-loongarch +32bit-emul = elf32loongarch +64bit-emul = elf64loongarch + +ifdef CONFIG_64BIT +tool-archpref = $(64bit-tool-archpref) +UTS_MACHINE := loongarch64 +endif + +ifneq ($(SUBARCH),$(ARCH)) + ifeq ($(CROSS_COMPILE),) + CROSS_COMPILE := $(call cc-cross-prefix, $(tool-archpref)-linux- $(tool-archpref)-linux-gnu- $(tool-archpref)-unknown-linux-gnu-) + endif +endif + +cflags-y += $(call cc-option, -mno-check-zero-division) + +ifdef CONFIG_64BIT +ld-emul = $(64bit-emul) +cflags-y += -mabi=lp64 +endif + +all-y := vmlinux + +# +# GCC uses -G 0 -mabicalls -fpic as default. We don't want PIC in the kernel +# code since it only slows down the whole thing. At some point we might make +# use of global pointer optimizations but their use of $r2 conflicts with +# the current pointer optimization. +# +cflags-y += -G 0 -pipe +cflags-y += -msoft-float +LDFLAGS_vmlinux += -G 0 -static -n -nostdlib +KBUILD_AFLAGS_KERNEL += -Wa,-mla-global-with-pcrel +KBUILD_CFLAGS_KERNEL += -Wa,-mla-global-with-pcrel +KBUILD_AFLAGS_MODULE += -Wa,-mla-global-with-abs +KBUILD_CFLAGS_MODULE += -fno-plt -Wa,-mla-global-with-abs,-mla-local-with-abs + +cflags-y += -ffreestanding + +# Some distribution-specific toolchains might pass the -fstack-check +# option during the build, which adds a simple stack-probe at the beginning +# of every function. This stack probe is to ensure that there is enough +# stack space, else a SEGV is generated. This is not desirable for LoongArch +# as kernel stacks are small, placed in unmapped virtual memory, and do not +# grow when overflowed. +# +cflags-y += -fno-stack-check + +# +# Board-dependent options and extra files +# +include arch/loongarch/Kbuild.platforms + +ifdef CONFIG_PHYSICAL_START +load-y = $(CONFIG_PHYSICAL_START) +endif + +drivers-$(CONFIG_PCI) += arch/loongarch/pci/ + +KBUILD_AFLAGS += $(cflags-y) +KBUILD_CFLAGS += $(cflags-y) +KBUILD_CPPFLAGS += -DVMLINUX_LOAD_ADDRESS=$(load-y) + +bootvars-y = VMLINUX_LOAD_ADDRESS=$(load-y) PLATFORM="$(platform-y)" + +ifdef CONFIG_64BIT +bootvars-y += ADDR_BITS=64 +endif + +# This is required to get dwarf unwinding tables into .debug_frame +# instead of .eh_frame so we don't discard them. +KBUILD_CFLAGS += -fno-asynchronous-unwind-tables + +KBUILD_LDFLAGS += -m $(ld-emul) + +ifdef CONFIG_LOONGARCH +CHECKFLAGS += $(shell $(CC) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \ + egrep -vw '__GNUC_(|MINOR_|PATCHLEVEL_)_' | \ + sed -e "s/^\#define /-D'/" -e "s/ /'='/" -e "s/$$/'/" -e 's/\$$/&&/g') +endif + +head-y := arch/loongarch/kernel/head.o + +libs-y += arch/loongarch/lib/ + +# See arch/loongarch/Kbuild for content of core part of the kernel +core-y += arch/loongarch/ + +# boot image targets (arch/loongarch/boot/) +boot-y := vmlinux.bin + +all: $(all-y) + +# boot +$(boot-y): vmlinux FORCE + $(Q)$(MAKE) $(build)=arch/loongarch/boot VMLINUX=vmlinux \ + $(bootvars-y) arch/loongarch/boot/$@ + +CLEAN_FILES += vmlinux + +install: + $(Q)install -D -m 755 vmlinux $(INSTALL_PATH)/vmlinux-$(KERNELRELEASE) + $(Q)install -D -m 644 .config $(INSTALL_PATH)/config-$(KERNELRELEASE) + $(Q)install -D -m 644 System.map $(INSTALL_PATH)/System.map-$(KERNELRELEASE) + +define archhelp + echo ' install - install kernel into $(INSTALL_PATH)' + echo ' vmlinux.bin - Raw binary boot image' + echo +endef diff --git a/arch/loongarch/include/asm/Kbuild b/arch/loongarch/include/asm/Kbuild new file mode 100644 index 000000000000..10d6c39eb8b1 --- /dev/null +++ b/arch/loongarch/include/asm/Kbuild @@ -0,0 +1,30 @@ +# SPDX-License-Identifier: GPL-2.0 +generic-y += dma-contiguous.h +generic-y += export.h +generic-y += mcs_spinlock.h +generic-y += parport.h +generic-y += early_ioremap.h +generic-y += qrwlock.h +generic-y += qspinlock.h +generic-y += rwsem.h +generic-y += segment.h +generic-y += user.h +generic-y += rwsem.h +generic-y += stat.h +generic-y += fcntl.h +generic-y += ioctl.h +generic-y += ioctls.h +generic-y += mman.h +generic-y += msgbuf.h +generic-y += sembuf.h +generic-y += shmbuf.h +generic-y += statfs.h +generic-y += socket.h +generic-y += sockios.h +generic-y += termios.h +generic-y += termbits.h +generic-y += poll.h +generic-y += param.h +generic-y += posix_types.h +generic-y += resource.h +generic-y += kvm_para.h diff --git a/arch/loongarch/include/uapi/asm/Kbuild b/arch/loongarch/include/uapi/asm/Kbuild new file mode 100644 index 000000000000..4aa680ca2e5f --- /dev/null +++ b/arch/loongarch/include/uapi/asm/Kbuild @@ -0,0 +1,2 @@ +# SPDX-License-Identifier: GPL-2.0 +generic-y += kvm_para.h diff --git a/arch/loongarch/kernel/Makefile b/arch/loongarch/kernel/Makefile new file mode 100644 index 000000000000..e37f8016d93c --- /dev/null +++ b/arch/loongarch/kernel/Makefile @@ -0,0 +1,24 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# Makefile for the Linux/LoongArch kernel. +# + +extra-y := head.o vmlinux.lds + +obj-y += cmpxchg.o cpu-probe.o elf.o entry.o genex.o idle.o irq.o \ + process.o ptrace.o reset.o setup.o signal.o io.o \ + syscall.o time.o topology.o traps.o unaligned.o \ + cmdline.o switch.o cacheinfo.o vdso.o + +obj-$(CONFIG_ACPI) += acpi.o +obj-$(CONFIG_EFI) += efi.o + +obj-$(CONFIG_MODULES) += module.o + +obj-$(CONFIG_CPU_HAS_FPU) += fpu.o + +obj-$(CONFIG_64BIT) += scall64.o + +obj-$(CONFIG_PROC_FS) += proc.o + +CPPFLAGS_vmlinux.lds := $(KBUILD_CFLAGS) diff --git a/arch/loongarch/kernel/vmlinux.lds.S b/arch/loongarch/kernel/vmlinux.lds.S new file mode 100644 index 000000000000..3ae212100de5 --- /dev/null +++ b/arch/loongarch/kernel/vmlinux.lds.S @@ -0,0 +1,112 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#include <asm/asm-offsets.h> +#include <asm/thread_info.h> + +#define PAGE_SIZE _PAGE_SIZE + +/* + * Put .bss..swapper_pg_dir as the first thing in .bss. This will + * ensure that it has .bss alignment (64K). + */ +#define BSS_FIRST_SECTIONS *(.bss..swapper_pg_dir) + +#include <asm-generic/vmlinux.lds.h> + +OUTPUT_ARCH(loongarch) +ENTRY(kernel_entry) +PHDRS { + text PT_LOAD FLAGS(7); /* RWX */ + note PT_NOTE FLAGS(4); /* R__ */ +} + +jiffies = jiffies_64; + +SECTIONS +{ + . = VMLINUX_LOAD_ADDRESS; + /* Read-only */ + _text = .; /* Text and read-only data */ + .text : { + TEXT_TEXT + SCHED_TEXT + CPUIDLE_TEXT + LOCK_TEXT + KPROBES_TEXT + IRQENTRY_TEXT + SOFTIRQENTRY_TEXT + *(.fixup) + *(.gnu.warning) + } :text = 0 + _etext = .; /* End of text section */ + + EXCEPTION_TABLE(16) + + _sdata = .; /* Start of data section */ + RO_DATA(4096) + RW_DATA(1 << CONFIG_L1_CACHE_SHIFT, PAGE_SIZE, THREAD_SIZE) + + /* We want the small data sections together, so single-instruction offsets + can access them all, and initialized data all before uninitialized, so + we can shorten the on-disk segment size. */ + .sdata : { + *(.sdata) + } + _edata = .; /* End of data section */ + + /* Will be freed after init */ + . = ALIGN(PAGE_SIZE); /* Init code and data */ + __init_begin = .; + INIT_TEXT_SECTION(PAGE_SIZE) + INIT_DATA_SECTION(16) + + . = ALIGN(4); + + /* .exit.text is discarded at runtime, not link time, to deal with + * references from .rodata + */ + .exit.text : { + EXIT_TEXT + } + .exit.data : { + EXIT_DATA + } + + /* + * Align to 64K in attempt to eliminate holes before the + * .bss..swapper_pg_dir section at the start of .bss. This + * also satisfies PAGE_SIZE alignment as the largest page size + * allowed is 64K. + */ + . = ALIGN(0x10000); + __init_end = .; + /* freed after init ends here */ + + /* + * Force .bss to 64K alignment so that .bss..swapper_pg_dir + * gets that alignment. .sbss should be empty, so there will be + * no holes after __init_end. */ + BSS_SECTION(0, 0x10000, 8) + + _end = . ; + + STABS_DEBUG + DWARF_DEBUG + + /* These must appear regardless of . */ + .gptab.sdata : { + *(.gptab.data) + *(.gptab.sdata) + } + .gptab.sbss : { + *(.gptab.bss) + *(.gptab.sbss) + } + + /* Sections to be discarded */ + DISCARDS + /DISCARD/ : { + *(.gnu.attributes) + *(.options) + *(.eh_frame) + } +} diff --git a/arch/loongarch/lib/Makefile b/arch/loongarch/lib/Makefile new file mode 100644 index 000000000000..04916bcde679 --- /dev/null +++ b/arch/loongarch/lib/Makefile @@ -0,0 +1,7 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# Makefile for LoongArch-specific library files.. +# + +lib-y += delay.o memcpy.o memset.o \ + strncpy_user.o strnlen_user.o dump_tlb.o diff --git a/arch/loongarch/loongson64/Makefile b/arch/loongarch/loongson64/Makefile new file mode 100644 index 000000000000..42e92e5e12be --- /dev/null +++ b/arch/loongarch/loongson64/Makefile @@ -0,0 +1,8 @@ +# +# All Loongson based systems +# + +obj-y += setup.o init.o env.o reset.o irq.o mem.o \ + rtc.o boardinfo.o + +obj-$(CONFIG_PCI_MSI) += msi.o diff --git a/arch/loongarch/loongson64/Platform b/arch/loongarch/loongson64/Platform new file mode 100644 index 000000000000..387e9ae38a51 --- /dev/null +++ b/arch/loongarch/loongson64/Platform @@ -0,0 +1,14 @@ +# +# Loongson Processors' Support +# + +cflags-$(CONFIG_CPU_LOONGSON64) += $(call as-option,-Wa$(comma)-mno-fix-loongson3-llsc,) +cflags-$(CONFIG_CPU_LOONGSON64) += -U_LOONGARCH_ISA -D_LOONGARCH_ISA=_LOONGARCH_ISA_LOONGARCH64 + +# +# Loongson Machines Support +# + +platform-$(CONFIG_MACH_LOONGSON64) += loongson64/ +cflags-$(CONFIG_MACH_LOONGSON64) += -I$(srctree)/arch/loongarch/include/asm/mach-loongson64 +load-$(CONFIG_MACH_LOONGSON64) += 0x9000000000200000 diff --git a/arch/loongarch/mm/Makefile b/arch/loongarch/mm/Makefile new file mode 100644 index 000000000000..a3a137709650 --- /dev/null +++ b/arch/loongarch/mm/Makefile @@ -0,0 +1,10 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# Makefile for the Linux/LoongArch-specific parts of the memory manager. +# + +obj-y += init.o cache.o tlb.o tlbex.o extable.o \ + fault.o ioremap.o maccess.o mmap.o pgtable.o page.o + +obj-$(CONFIG_64BIT) += pgtable-64.o +obj-$(CONFIG_HUGETLB_PAGE) += hugetlbpage.o diff --git a/arch/loongarch/pci/Makefile b/arch/loongarch/pci/Makefile new file mode 100644 index 000000000000..113a395ad4a3 --- /dev/null +++ b/arch/loongarch/pci/Makefile @@ -0,0 +1,9 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# Makefile for the PCI specific kernel interface routines under Linux. +# + +obj-y += pci.o +obj-$(CONFIG_ACPI) += acpi.o +obj-$(CONFIG_PCI_MMCONFIG) += mmconfig.o +obj-$(CONFIG_MACH_LOONGSON64) += pci-loongson.o diff --git a/scripts/subarch.include b/scripts/subarch.include index 650682821126..c79e0d0b1a19 100644 --- a/scripts/subarch.include +++ b/scripts/subarch.include @@ -10,4 +10,4 @@ SUBARCH := $(shell uname -m | sed -e s/i.86/x86/ -e s/x86_64/x86/ \ -e s/s390x/s390/ -e s/parisc64/parisc/ \ -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \ -e s/sh[234].*/sh/ -e s/aarch64.*/arm64/ \ - -e s/riscv.*/riscv/) + -e s/riscv.*/riscv/ -e s/loongarch.*/loongarch/) -- 2.27.0
