Re: [PATCH V9 05/24] LoongArch: Add build infrastructure
From: Huacai Chen <hidden>
Date: 2022-05-01 12:42:09
Also in:
linux-arch, lkml
Hi, Xuerui, On Sun, May 1, 2022 at 6:09 PM WANG Xuerui [off-list ref] wrote:
On 4/30/22 17:04, Huacai Chen wrote:quoted
This patch adds Kbuild, Makefile, Kconfig and link script for LoongArch build infrastructure. Signed-off-by: Huacai Chen <redacted> --- arch/loongarch/.gitignore | 9 + arch/loongarch/Kbuild | 3 + arch/loongarch/Kconfig | 351 +++++++++++++++++++++++++ arch/loongarch/Kconfig.debug | 0 arch/loongarch/Makefile | 99 +++++++ arch/loongarch/include/asm/Kbuild | 29 ++ arch/loongarch/include/uapi/asm/Kbuild | 2 + arch/loongarch/kernel/Makefile | 22 ++ arch/loongarch/kernel/vmlinux.lds.S | 100 +++++++ arch/loongarch/lib/Makefile | 7 + arch/loongarch/mm/Makefile | 9 + arch/loongarch/pci/Makefile | 7 + scripts/subarch.include | 2 +- 13 files changed, 639 insertions(+), 1 deletion(-) create mode 100644 arch/loongarch/.gitignore create mode 100644 arch/loongarch/Kbuild 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/mm/Makefile create mode 100644 arch/loongarch/pci/Makefilediff --git a/arch/loongarch/.gitignore b/arch/loongarch/.gitignore new file mode 100644 index 000000000000..fd88d21e7172 --- /dev/null +++ b/arch/loongarch/.gitignore@@ -0,0 +1,9 @@ +*.lds +*.raw +calc_vmlinuz_load_addr +elf-entry +relocs +vmlinux* +vmlinuz* + +!kernel/vmlinux.lds.SThis exclude entry is unnecessary?quoted
diff --git a/arch/loongarch/Kbuild b/arch/loongarch/Kbuild new file mode 100644 index 000000000000..1ad35aabdd16 --- /dev/null +++ b/arch/loongarch/Kbuild@@ -0,0 +1,3 @@ +obj-y += kernel/ +obj-y += mm/ +obj-y += vdso/diff --git a/arch/loongarch/Kconfig b/arch/loongarch/Kconfig new file mode 100644 index 000000000000..44b763046893 --- /dev/null +++ b/arch/loongarch/Kconfig@@ -0,0 +1,351 @@ +# SPDX-License-Identifier: GPL-2.0 +config LOONGARCH + bool + default y + select ACPI_MCFG if ACPI + select ACPI_SYSTEM_POWER_STATES_SUPPORT if ACPI + select ARCH_BINFMT_ELF_STATE + select ARCH_ENABLE_MEMORY_HOTPLUG + select ARCH_ENABLE_MEMORY_HOTREMOVE + select ARCH_HAS_ACPI_TABLE_UPGRADE if ACPI + select ARCH_HAS_PTE_SPECIAL + 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_MIGHT_HAVE_PC_PARPORT + select ARCH_MIGHT_HAVE_PC_SERIO + select ARCH_SPARSEMEM_ENABLE + select ARCH_SUPPORTS_ACPI + select ARCH_SUPPORTS_ATOMIC_RMW + select ARCH_SUPPORTS_HUGETLBFS + select ARCH_USE_BUILTIN_BSWAP + select ARCH_USE_CMPXCHG_LOCKREF + select ARCH_USE_QUEUED_RWLOCKS + select ARCH_USE_QUEUED_SPINLOCKS + select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT + select ARCH_WANTS_NO_INSTR + select BUILDTIME_TABLE_SORT + select COMMON_CLK + select GENERIC_CLOCKEVENTS + select GENERIC_CMOS_UPDATE + select GENERIC_CPU_AUTOPROBE + select GENERIC_ENTRY + select GENERIC_FIND_FIRST_BIT + select GENERIC_GETTIMEOFDAY + select GENERIC_IRQ_MULTI_HANDLER + 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_PCI_IOMAP + select GENERIC_SCHED_CLOCK + select GENERIC_TIME_VSYSCALL + select GPIOLIB + 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_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_GENERIC_VDSO + 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_PCI + select HAVE_PERF_EVENTS + select HAVE_REGS_AND_STACK_ACCESS_API + select HAVE_RSEQ + select HAVE_SYSCALL_TRACEPOINTS + select HAVE_TIF_NOHZ + select HAVE_VIRT_CPU_ACCOUNTING_GEN + select IRQ_FORCED_THREADING + select IRQ_LOONGARCH_CPU + select MODULES_USE_ELF_RELA if MODULES + select PCI + select PCI_DOMAINS_GENERIC + select PCI_ECAM if ACPI + select PCI_MSI_ARCH_FALLBACKS + select PERF_USE_VMALLOC + select RTC_LIB + select SPARSE_IRQ + select SYSCTL_EXCEPTION_TRACE + select SWIOTLB + select TRACE_IRQFLAGS_SUPPORT + select ZONE_DMA32 + +config 32BIT + bool + +config 64BIT + def_bool y + +config CPU_HAS_FPU + bool + default y + +config CPU_HAS_PREFETCH + bool + default y + +config GENERIC_CALIBRATE_DELAY + def_bool y + +config GENERIC_CSUM + def_bool y + +config GENERIC_HWEIGHT + def_bool y + +config L1_CACHE_SHIFT + int + default "6" + +config LOCKDEP_SUPPORT + bool + default y + +config MACH_LOONGSON32 + def_bool 32BIT + +config MACH_LOONGSON64 + def_bool 64BITThese two config symbols are not used anywhere in arch/loongarch, but from a quick grep it seems they're sharing the names of the MIPS config symbols, on purpose, maybe for sharing code between the MIPS-era Loongson models and the LoongArch models. If so, a comment explaining this could be beneficial.quoted
+ +config PAGE_SIZE_4KB + bool + +config PAGE_SIZE_16KB + bool + +config PAGE_SIZE_64KB + bool + +config PGTABLE_2LEVEL + bool + +config PGTABLE_3LEVEL + bool + +config PGTABLE_4LEVEL + bool + +config PGTABLE_LEVELS + int + default 2 if PGTABLE_2LEVEL + default 3 if PGTABLE_3LEVEL + default 4 if PGTABLE_4LEVEL + +config SCHED_OMIT_FRAME_POINTER + bool + default y + +menu "Kernel type" + +source "kernel/Kconfig.hz" + +choice + prompt "Page Table Layout" + default 16KB_2LEVEL if 32BIT + default 16KB_3LEVEL if 64BIT + help + Allows choosing the page table layout, which is a combination + of page size and page table levels. The virtual memory address + space bits are determined by the page table layout."The size of virtual memory address space"?quoted
+ +config 4KB_3LEVEL + bool "4KB with 3 levels" + select PAGE_SIZE_4KB + select PGTABLE_3LEVEL + help + This option selects 4KB page size with 3 level page tables, which + support a maximum 39 bits of application virtual memory."a maximum of XX bits" -- similarly for all occurrences below.
OK, most of your suggestions will be taken. Huacai
quoted
+ +config 4KB_4LEVEL + bool "4KB with 4 levels" + select PAGE_SIZE_4KB + select PGTABLE_4LEVEL + help + This option selects 4KB page size with 4 level page tables, which + support a maximum 48 bits of application virtual memory. + +config 16KB_2LEVEL + bool "16KB with 2 levels" + select PAGE_SIZE_16KB + select PGTABLE_2LEVEL + help + This option selects 16KB page size with 2 level page tables, which + support a maximum 36 bits of application virtual memory. + +config 16KB_3LEVEL + bool "16KB with 3 levels" + select PAGE_SIZE_16KB + select PGTABLE_3LEVEL + help + This option selects 16KB page size with 3 level page tables, which + support a maximum 47 bits of application virtual memory. + +config 64KB_2LEVEL + bool "64KB with 2 levels" + select PAGE_SIZE_64KB + select PGTABLE_2LEVEL + help + This option selects 64KB page size with 2 level page tables, which + support a maximum 42 bits of application virtual memory. + +config 64KB_3LEVEL + bool "64KB with 3 levels" + select PAGE_SIZE_64KB + select PGTABLE_3LEVEL + help + This option selects 64KB page size with 3 level page tables, which + support a maximum 55 bits of application virtual memory. + +endchoice + +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 YShould be "Enable scanning ..." but the arch/x86 and arch/mips versions of this text all have this typo. Might be wise to fix here... then fix the other two later.quoted
+ here unless you have verified that your setup is not + affected by entries in the DMI blacklist. Required by PNP + BIOS code.Do we have a "PNP BIOS"? I know this is also copied text, but we may tweak it to suit our platform.quoted
+ +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, theRemove mention of ELILO?quoted
+ resultant kernel should continue to boot on existing non-EFI + platforms. + +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 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_SELECT_MEMORY_MODEL + def_bool y + +config ARCH_FLATMEM_ENABLE + def_bool y + +config ARCH_SPARSEMEM_ENABLE + def_bool y + 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 ARCH_ENABLE_THP_MIGRATION + def_bool y + depends on TRANSPARENT_HUGEPAGE + +config ARCH_MEMORY_PROBE + def_bool y + depends on MEMORY_HOTPLUG + +config MMU + bool + default y + +config ARCH_MMAP_RND_BITS_MIN + default 12 + +config ARCH_MMAP_RND_BITS_MAX + default 18 + +menu "Bus options" + +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..0a40e79b3265 --- /dev/null +++ b/arch/loongarch/Makefile@@ -0,0 +1,99 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# Author: Huacai Chen <chenhuacai@loongson.cn> +# Copyright (C) 2020-2022 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=lp64s +endif + +all-y := vmlinux + +# +# GCC uses -G0 -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.LoongArch doesn't have any notion of "abicalls", please remove the whole MIPS legacy... or at least replace with something suitable for LoongArch.quoted
+# +cflags-y += -G0 -pipe +cflags-y += -msoft-float +LDFLAGS_vmlinux += -G0 -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 += -fplt -Wa,-mla-global-with-abs,-mla-local-with-absThese switches are the ones that should receive more love via comments... they are here to tell the assembler to emit the "la.global" and "la.local" pseudo-insns in a particular "flavor". Why not simply use the default? This needs explanation!quoted
+ +cflags-y += -ffreestanding +cflags-y += $(call as-option,-Wa$(comma)-mno-fix-loongson3-llsc,)Unfortunately we're still working around the LL/SC hardware issue even after migrating to LoongArch... might be better to add a comment too. (something along the line of "we work around the issue manually in the handwritten assembly, so no automatic workarounds should kick in")quoted
+ +load-y = 0x9000000000200000 +bootvars-y = VMLINUX_LOAD_ADDRESS=$(load-y) + +drivers-$(CONFIG_PCI) += arch/loongarch/pci/ + +KBUILD_AFLAGS += $(cflags-y) +KBUILD_CFLAGS += $(cflags-y) +KBUILD_CPPFLAGS += -DVMLINUX_LOAD_ADDRESS=$(load-y) + +# 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_CFLAGS += -isystem $(shell $(CC) -print-file-name=include) +KBUILD_CFLAGS += $(call cc-option,-mstrict-align)Explain reason of this -mstrict-align request -- it's because not all LoongArch cores support unaligned accesses, and as kernel we can't rely on others to provide emulation for these accesses.quoted
+ +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/ + +prepare: vdso_prepare +vdso_prepare: prepare0 + $(Q)$(MAKE) $(build)=arch/loongarch/vdso include/generated/vdso-offsets.h + +PHONY += vdso_install +vdso_install: + $(Q)$(MAKE) $(build)=arch/loongarch/vdso $@ + +all: $(all-y) + +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 $(INSTALL_PATH)' + echo +endefdiff --git a/arch/loongarch/include/asm/Kbuild b/arch/loongarch/include/asm/Kbuild new file mode 100644 index 000000000000..a0eed6076c79 --- /dev/null +++ b/arch/loongarch/include/asm/Kbuild@@ -0,0 +1,29 @@ +# SPDX-License-Identifier: GPL-2.0 +generic-y += dma-contiguous.h +generic-y += export.h +generic-y += mcs_spinlock.h +generic-y += parport.h +generic-y += early_ioremap.h +generic-y += qrwlock.h +generic-y += qspinlock.h +generic-y += rwsem.h +generic-y += segment.h +generic-y += user.h +generic-y += stat.h +generic-y += fcntl.h +generic-y += ioctl.h +generic-y += ioctls.h +generic-y += mman.h +generic-y += msgbuf.h +generic-y += sembuf.h +generic-y += shmbuf.h +generic-y += statfs.h +generic-y += socket.h +generic-y += sockios.h +generic-y += termios.h +generic-y += termbits.h +generic-y += poll.h +generic-y += param.h +generic-y += posix_types.h +generic-y += resource.h +generic-y += kvm_para.hdiff --git a/arch/loongarch/include/uapi/asm/Kbuild b/arch/loongarch/include/uapi/asm/Kbuild new file mode 100644 index 000000000000..4aa680ca2e5f --- /dev/null +++ b/arch/loongarch/include/uapi/asm/Kbuild@@ -0,0 +1,2 @@ +# SPDX-License-Identifier: GPL-2.0 +generic-y += kvm_para.hdiff --git a/arch/loongarch/kernel/Makefile b/arch/loongarch/kernel/Makefile new file mode 100644 index 000000000000..ead27a11e8e0 --- /dev/null +++ b/arch/loongarch/kernel/Makefile@@ -0,0 +1,22 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# Makefile for the Linux/LoongArch kernel. +# + +extra-y := head.o vmlinux.lds + +obj-y += cpu-probe.o cacheinfo.o cmdline.o env.o setup.o entry.o genex.o \ + traps.o irq.o idle.o process.o dma.o mem.o io.o reset.o switch.o \ + elf.o rtc.o syscall.o signal.o time.o topology.o cmpxchg.o \ + inst.o ptrace.o vdso.o + +obj-$(CONFIG_ACPI) += acpi.o +obj-$(CONFIG_EFI) += efi.o + +obj-$(CONFIG_CPU_HAS_FPU) += fpu.o + +obj-$(CONFIG_MODULES) += module.o module-sections.o + +obj-$(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..02abfaaa4892 --- /dev/null +++ b/arch/loongarch/kernel/vmlinux.lds.S@@ -0,0 +1,100 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#include <linux/sizes.h> +#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; + + _text = .; + .text : { + TEXT_TEXT + SCHED_TEXT + CPUIDLE_TEXT + LOCK_TEXT + KPROBES_TEXT + IRQENTRY_TEXT + SOFTIRQENTRY_TEXT + *(.fixup) + *(.gnu.warning) + } :text = 0 + _etext = .; + + EXCEPTION_TABLE(16) + + . = ALIGN(PAGE_SIZE); + __init_begin = .; + __inittext_begin = .; + + INIT_TEXT_SECTION(PAGE_SIZE) + .exit.text : { + EXIT_TEXT + } + + __inittext_end = .; + + __initdata_begin = .; + + INIT_DATA_SECTION(16) + .exit.data : { + EXIT_DATA + } + + __initdata_end = .; + + __init_end = .; + + _sdata = .; + RO_DATA(4096) + RW_DATA(1 << CONFIG_L1_CACHE_SHIFT, PAGE_SIZE, THREAD_SIZE) + + .sdata : { + *(.sdata) + } + + . = ALIGN(SZ_64K); + _edata = .; + + BSS_SECTION(0, SZ_64K, 8) + + _end = .; + + STABS_DEBUG + DWARF_DEBUG + + .gptab.sdata : { + *(.gptab.data) + *(.gptab.sdata) + } + .gptab.sbss : { + *(.gptab.bss) + *(.gptab.sbss) + } + + 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..7f32f3e4a6ec --- /dev/null +++ b/arch/loongarch/lib/Makefile@@ -0,0 +1,7 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# Makefile for LoongArch-specific library files..One extra period at end of line.quoted
+# + +lib-y += delay.o memset.o memcpy.o memmove.o \ + clear_user.o copy_user.o dump_tlb.odiff --git a/arch/loongarch/mm/Makefile b/arch/loongarch/mm/Makefile new file mode 100644 index 000000000000..8ffc6383f836 --- /dev/null +++ b/arch/loongarch/mm/Makefile@@ -0,0 +1,9 @@ +# 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_HUGETLB_PAGE) += hugetlbpage.odiff --git a/arch/loongarch/pci/Makefile b/arch/loongarch/pci/Makefile new file mode 100644 index 000000000000..8101ef3df71c --- /dev/null +++ b/arch/loongarch/pci/Makefile@@ -0,0 +1,7 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# Makefile for the PCI specific kernel interface routines under Linux. +# + +obj-y += pci.o +obj-$(CONFIG_ACPI) += acpi.odiff --git a/scripts/subarch.include b/scripts/subarch.include index 776849a3c500..4bd327d0ae42 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/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/)