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RISC-V updates for v5.3
- Hugepage support - "Image" header support for RISC-V kernel binaries, compatible with the current ARM64 "Image" header - Initial page table setup now split into two stages - CONFIG_SOC support (starting with SiFive SoCs) - Avoid reserving memory between RAM start and the kernel in setup_bootmem() - Enable high-res timers and dynamic tick in the RV64 defconfig - Remove long-deprecated gate area stubs - MAINTAINERS updates to switch to the newly-created shared RISC-V git tree, and to fix a get_maintainers.pl issue for patches involving SiFive E-mail addresses Also, one integration fix to resolve a build problem introduced during in the v5.3-rc1 merge window: - Fix build break after macro-to-function conversion in asm-generic/cacheflush.h -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEElRDoIDdEz9/svf2Kx4+xDQu9KksFAl0wwmkACgkQx4+xDQu9 KkvM0A//W641P2vQm/GBkPiqecAoYhRdGGXO7En3UiOSMe6qoDvhX9p09OtgGWa9 0XyEdj0RQK4UuE07EnHsaIAynYdbv/er1cskkdGRhs28FdJTP2z3OrfnjcRBPQtP mP1d4fwm+n0DTx+BzxihNu+CRSClqVSl58ruaGiN6ZttEuJsVyjM32OPQfQapxxW TWl1oHugXmWLg0QIB+fjNLY9om143di6pRJeBWAQRSDzjA1x+lkVxPy6pqUK3Hjb F/kio+0ornReAwoY8n9WXPijUQ/bK6uY5gj2XpCpbEVbfaWjlh/a9hN8OveDLzFP F2l9bdKaR9/w0B7tplE7MllVI91S3gJ/UscZJQNmVStjY9iI4gphT5Hji6eR5RH4 j15piAR9fY91iXH9XfJYIs69J1oYsaeDBUji8Sy7IdHwQwjdUjncVSF7IUakA6UJ okE1mq14ErZK+E2nl9OJvE89pep0R9GZDQ1kCFKQSw979CfnINDmfr5TsuiRdTU4 mdeYmSu+l6szknLRL/bzMATAAmx6KXAO409scs8KD/xNxOylWkeZ+P47MYpEsV56 G6d3GVZO5r+YafZYjF4aDHATI1Sh/aFPUHRrdqWSAlLJfAIMImV9Vf2UJhotzcTR XDWLZLqFqXB/Vl1xgkmtDAKdEEfu3iL9M9J6szYZdtI9fSiRWl4= =SVSp -----END PGP SIGNATURE----- Merge tag 'riscv/for-v5.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux Pull RISC-V updates from Paul Walmsley: - Hugepage support - "Image" header support for RISC-V kernel binaries, compatible with the current ARM64 "Image" header - Initial page table setup now split into two stages - CONFIG_SOC support (starting with SiFive SoCs) - Avoid reserving memory between RAM start and the kernel in setup_bootmem() - Enable high-res timers and dynamic tick in the RV64 defconfig - Remove long-deprecated gate area stubs - MAINTAINERS updates to switch to the newly-created shared RISC-V git tree, and to fix a get_maintainers.pl issue for patches involving SiFive E-mail addresses Also, one integration fix to resolve a build problem introduced during in the v5.3-rc1 merge window: - Fix build break after macro-to-function conversion in asm-generic/cacheflush.h * tag 'riscv/for-v5.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux: riscv: fix build break after macro-to-function conversion in generic cacheflush.h RISC-V: Add an Image header that boot loader can parse. RISC-V: Setup initial page tables in two stages riscv: remove free_initrd_mem riscv: ccache: Remove unused variable riscv: Introduce huge page support for 32/64bit kernel x86, arm64: Move ARCH_WANT_HUGE_PMD_SHARE config in arch/Kconfig RISC-V: Fix memory reservation in setup_bootmem() riscv: defconfig: enable SOC_SIFIVE riscv: select SiFive platform drivers with SOC_SIFIVE arch: riscv: add config option for building SiFive's SoC resource riscv: Remove gate area stubs MAINTAINERS: change the arch/riscv git tree to the new shared tree MAINTAINERS: don't automatically patches involving SiFive to the linux-riscv list RISC-V: defconfig: Enable NO_HZ_IDLE and HIGH_RES_TIMERS
This commit is contained in:
Linus Torvalds
commit
0570bc8b7c
50
Documentation/riscv/boot-image-header.txt
Normal file
50
Documentation/riscv/boot-image-header.txt
Normal file
@ -0,0 +1,50 @@
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Boot image header in RISC-V Linux
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=============================================
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Author: Atish Patra <atish.patra@wdc.com>
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Date : 20 May 2019
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This document only describes the boot image header details for RISC-V Linux.
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The complete booting guide will be available at Documentation/riscv/booting.txt.
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The following 64-byte header is present in decompressed Linux kernel image.
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u32 code0; /* Executable code */
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u32 code1; /* Executable code */
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u64 text_offset; /* Image load offset, little endian */
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u64 image_size; /* Effective Image size, little endian */
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u64 flags; /* kernel flags, little endian */
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u32 version; /* Version of this header */
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u32 res1 = 0; /* Reserved */
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u64 res2 = 0; /* Reserved */
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u64 magic = 0x5643534952; /* Magic number, little endian, "RISCV" */
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u32 res3; /* Reserved for additional RISC-V specific header */
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u32 res4; /* Reserved for PE COFF offset */
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This header format is compliant with PE/COFF header and largely inspired from
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ARM64 header. Thus, both ARM64 & RISC-V header can be combined into one common
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header in future.
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Notes:
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- This header can also be reused to support EFI stub for RISC-V in future. EFI
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specification needs PE/COFF image header in the beginning of the kernel image
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in order to load it as an EFI application. In order to support EFI stub,
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code0 should be replaced with "MZ" magic string and res5(at offset 0x3c) should
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point to the rest of the PE/COFF header.
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- version field indicate header version number.
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Bits 0:15 - Minor version
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Bits 16:31 - Major version
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This preserves compatibility across newer and older version of the header.
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The current version is defined as 0.1.
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- res3 is reserved for offset to any other additional fields. This makes the
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header extendible in future. One example would be to accommodate ISA
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extension for RISC-V in future. For current version, it is set to be zero.
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- In current header, the flag field has only one field.
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Bit 0: Kernel endianness. 1 if BE, 0 if LE.
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- Image size is mandatory for boot loader to load kernel image. Booting will
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fail otherwise.
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@ -13720,7 +13720,7 @@ RISC-V ARCHITECTURE
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M: Palmer Dabbelt <palmer@sifive.com>
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M: Albert Ou <aou@eecs.berkeley.edu>
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L: linux-riscv@lists.infradead.org
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T: git git://git.kernel.org/pub/scm/linux/kernel/git/palmer/riscv-linux.git
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T: git git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git
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S: Supported
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F: arch/riscv/
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K: riscv
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@ -14582,7 +14582,7 @@ M: Paul Walmsley <paul.walmsley@sifive.com>
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L: linux-riscv@lists.infradead.org
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T: git git://github.com/sifive/riscv-linux.git
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S: Supported
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K: sifive
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K: [^@]sifive
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N: sifive
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SIFIVE FU540 SYSTEM-ON-CHIP
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@ -569,6 +569,9 @@ config HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD
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config HAVE_ARCH_HUGE_VMAP
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bool
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config ARCH_WANT_HUGE_PMD_SHARE
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bool
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config HAVE_ARCH_SOFT_DIRTY
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bool
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@ -73,6 +73,7 @@ config ARM64
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select ARCH_SUPPORTS_NUMA_BALANCING
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select ARCH_WANT_COMPAT_IPC_PARSE_VERSION if COMPAT
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select ARCH_WANT_FRAME_POINTERS
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select ARCH_WANT_HUGE_PMD_SHARE if ARM64_4K_PAGES || (ARM64_16K_PAGES && !ARM64_VA_BITS_36)
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select ARCH_HAS_UBSAN_SANITIZE_ALL
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select ARM_AMBA
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select ARM_ARCH_TIMER
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@ -906,7 +907,6 @@ config SYS_SUPPORTS_HUGETLBFS
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def_bool y
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config ARCH_WANT_HUGE_PMD_SHARE
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def_bool y if ARM64_4K_PAGES || (ARM64_16K_PAGES && !ARM64_VA_BITS_36)
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config ARCH_HAS_CACHE_LINE_SIZE
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def_bool y
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@ -52,6 +52,8 @@ config RISCV
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select ARCH_HAS_MMIOWB
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select HAVE_EBPF_JIT if 64BIT
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select EDAC_SUPPORT
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select ARCH_HAS_GIGANTIC_PAGE
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select ARCH_WANT_HUGE_PMD_SHARE if 64BIT
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config MMU
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def_bool y
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@ -66,6 +68,12 @@ config PAGE_OFFSET
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default 0xffffffff80000000 if 64BIT && MAXPHYSMEM_2GB
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default 0xffffffe000000000 if 64BIT && MAXPHYSMEM_128GB
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config ARCH_WANT_GENERAL_HUGETLB
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def_bool y
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config SYS_SUPPORTS_HUGETLBFS
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def_bool y
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config STACKTRACE_SUPPORT
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def_bool y
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@ -97,6 +105,8 @@ config PGTABLE_LEVELS
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default 3 if 64BIT
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default 2
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source "arch/riscv/Kconfig.socs"
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menu "Platform type"
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choice
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13
arch/riscv/Kconfig.socs
Normal file
13
arch/riscv/Kconfig.socs
Normal file
@ -0,0 +1,13 @@
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menu "SoC selection"
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config SOC_SIFIVE
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bool "SiFive SoCs"
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select SERIAL_SIFIVE
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select SERIAL_SIFIVE_CONSOLE
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select CLK_SIFIVE
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select CLK_SIFIVE_FU540_PRCI
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select SIFIVE_PLIC
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help
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This enables support for SiFive SoC platform hardware.
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endmenu
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@ -1,2 +1,2 @@
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# SPDX-License-Identifier: GPL-2.0
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dtb-y += hifive-unleashed-a00.dtb
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dtb-$(CONFIG_SOC_SIFIVE) += hifive-unleashed-a00.dtb
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@ -1,5 +1,7 @@
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CONFIG_SYSVIPC=y
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CONFIG_POSIX_MQUEUE=y
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CONFIG_NO_HZ_IDLE=y
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CONFIG_HIGH_RES_TIMERS=y
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CONFIG_IKCONFIG=y
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CONFIG_IKCONFIG_PROC=y
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CONFIG_CGROUPS=y
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@ -12,6 +14,7 @@ CONFIG_CHECKPOINT_RESTORE=y
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CONFIG_BLK_DEV_INITRD=y
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CONFIG_EXPERT=y
|
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CONFIG_BPF_SYSCALL=y
|
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CONFIG_SOC_SIFIVE=y
|
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CONFIG_SMP=y
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CONFIG_MODULES=y
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CONFIG_MODULE_UNLOAD=y
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@ -49,8 +52,6 @@ CONFIG_SERIAL_8250=y
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CONFIG_SERIAL_8250_CONSOLE=y
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CONFIG_SERIAL_OF_PLATFORM=y
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CONFIG_SERIAL_EARLYCON_RISCV_SBI=y
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CONFIG_SERIAL_SIFIVE=y
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CONFIG_SERIAL_SIFIVE_CONSOLE=y
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CONFIG_HVC_RISCV_SBI=y
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# CONFIG_PTP_1588_CLOCK is not set
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CONFIG_DRM=y
|
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@ -66,9 +67,6 @@ CONFIG_USB_OHCI_HCD_PLATFORM=y
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CONFIG_USB_STORAGE=y
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CONFIG_USB_UAS=y
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CONFIG_VIRTIO_MMIO=y
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CONFIG_CLK_SIFIVE=y
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CONFIG_CLK_SIFIVE_FU540_PRCI=y
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CONFIG_SIFIVE_PLIC=y
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CONFIG_SPI_SIFIVE=y
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CONFIG_EXT4_FS=y
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CONFIG_EXT4_FS_POSIX_ACL=y
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|
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@ -1,5 +1,7 @@
|
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CONFIG_SYSVIPC=y
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CONFIG_POSIX_MQUEUE=y
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CONFIG_NO_HZ_IDLE=y
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CONFIG_HIGH_RES_TIMERS=y
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CONFIG_IKCONFIG=y
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CONFIG_IKCONFIG_PROC=y
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CONFIG_CGROUPS=y
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|
||||
@ -6,11 +6,66 @@
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#ifndef _ASM_RISCV_CACHEFLUSH_H
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#define _ASM_RISCV_CACHEFLUSH_H
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#include <asm-generic/cacheflush.h>
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#include <linux/mm.h>
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||||
#undef flush_icache_range
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#undef flush_icache_user_range
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#undef flush_dcache_page
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#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 0
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/*
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* The cache doesn't need to be flushed when TLB entries change when
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* the cache is mapped to physical memory, not virtual memory
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*/
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static inline void flush_cache_all(void)
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{
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}
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static inline void flush_cache_mm(struct mm_struct *mm)
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{
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}
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||||
static inline void flush_cache_dup_mm(struct mm_struct *mm)
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{
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}
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static inline void flush_cache_range(struct vm_area_struct *vma,
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unsigned long start,
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unsigned long end)
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{
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}
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||||
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||||
static inline void flush_cache_page(struct vm_area_struct *vma,
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unsigned long vmaddr,
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unsigned long pfn)
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{
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}
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static inline void flush_dcache_mmap_lock(struct address_space *mapping)
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||||
{
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}
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|
||||
static inline void flush_dcache_mmap_unlock(struct address_space *mapping)
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{
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}
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||||
static inline void flush_icache_page(struct vm_area_struct *vma,
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struct page *page)
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{
|
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}
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||||
|
||||
static inline void flush_cache_vmap(unsigned long start, unsigned long end)
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{
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}
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||||
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static inline void flush_cache_vunmap(unsigned long start, unsigned long end)
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||||
{
|
||||
}
|
||||
|
||||
#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
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do { \
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memcpy(dst, src, len); \
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flush_icache_user_range(vma, page, vaddr, len); \
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||||
} while (0)
|
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#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
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memcpy(dst, src, len)
|
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|
||||
static inline void local_flush_icache_all(void)
|
||||
{
|
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|
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@ -21,6 +21,11 @@
|
||||
*/
|
||||
enum fixed_addresses {
|
||||
FIX_HOLE,
|
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#define FIX_FDT_SIZE SZ_1M
|
||||
FIX_FDT_END,
|
||||
FIX_FDT = FIX_FDT_END + FIX_FDT_SIZE / PAGE_SIZE - 1,
|
||||
FIX_PTE,
|
||||
FIX_PMD,
|
||||
FIX_EARLYCON_MEM_BASE,
|
||||
__end_of_fixed_addresses
|
||||
};
|
||||
|
||||
18
arch/riscv/include/asm/hugetlb.h
Normal file
18
arch/riscv/include/asm/hugetlb.h
Normal file
@ -0,0 +1,18 @@
|
||||
/* SPDX-License-Identifier: GPL-2.0 */
|
||||
#ifndef _ASM_RISCV_HUGETLB_H
|
||||
#define _ASM_RISCV_HUGETLB_H
|
||||
|
||||
#include <asm-generic/hugetlb.h>
|
||||
#include <asm/page.h>
|
||||
|
||||
static inline int is_hugepage_only_range(struct mm_struct *mm,
|
||||
unsigned long addr,
|
||||
unsigned long len) {
|
||||
return 0;
|
||||
}
|
||||
|
||||
static inline void arch_clear_hugepage_flags(struct page *page)
|
||||
{
|
||||
}
|
||||
|
||||
#endif /* _ASM_RISCV_HUGETLB_H */
|
||||
65
arch/riscv/include/asm/image.h
Normal file
65
arch/riscv/include/asm/image.h
Normal file
@ -0,0 +1,65 @@
|
||||
/* SPDX-License-Identifier: GPL-2.0 */
|
||||
|
||||
#ifndef __ASM_IMAGE_H
|
||||
#define __ASM_IMAGE_H
|
||||
|
||||
#define RISCV_IMAGE_MAGIC "RISCV"
|
||||
|
||||
#define RISCV_IMAGE_FLAG_BE_SHIFT 0
|
||||
#define RISCV_IMAGE_FLAG_BE_MASK 0x1
|
||||
|
||||
#define RISCV_IMAGE_FLAG_LE 0
|
||||
#define RISCV_IMAGE_FLAG_BE 1
|
||||
|
||||
#ifdef CONFIG_CPU_BIG_ENDIAN
|
||||
#error conversion of header fields to LE not yet implemented
|
||||
#else
|
||||
#define __HEAD_FLAG_BE RISCV_IMAGE_FLAG_LE
|
||||
#endif
|
||||
|
||||
#define __HEAD_FLAG(field) (__HEAD_FLAG_##field << \
|
||||
RISCV_IMAGE_FLAG_##field##_SHIFT)
|
||||
|
||||
#define __HEAD_FLAGS (__HEAD_FLAG(BE))
|
||||
|
||||
#define RISCV_HEADER_VERSION_MAJOR 0
|
||||
#define RISCV_HEADER_VERSION_MINOR 1
|
||||
|
||||
#define RISCV_HEADER_VERSION (RISCV_HEADER_VERSION_MAJOR << 16 | \
|
||||
RISCV_HEADER_VERSION_MINOR)
|
||||
|
||||
#ifndef __ASSEMBLY__
|
||||
/**
|
||||
* struct riscv_image_header - riscv kernel image header
|
||||
* @code0: Executable code
|
||||
* @code1: Executable code
|
||||
* @text_offset: Image load offset (little endian)
|
||||
* @image_size: Effective Image size (little endian)
|
||||
* @flags: kernel flags (little endian)
|
||||
* @version: version
|
||||
* @res1: reserved
|
||||
* @res2: reserved
|
||||
* @magic: Magic number
|
||||
* @res3: reserved (will be used for additional RISC-V specific
|
||||
* header)
|
||||
* @res4: reserved (will be used for PE COFF offset)
|
||||
*
|
||||
* The intention is for this header format to be shared between multiple
|
||||
* architectures to avoid a proliferation of image header formats.
|
||||
*/
|
||||
|
||||
struct riscv_image_header {
|
||||
u32 code0;
|
||||
u32 code1;
|
||||
u64 text_offset;
|
||||
u64 image_size;
|
||||
u64 flags;
|
||||
u32 version;
|
||||
u32 res1;
|
||||
u64 res2;
|
||||
u64 magic;
|
||||
u32 res3;
|
||||
u32 res4;
|
||||
};
|
||||
#endif /* __ASSEMBLY__ */
|
||||
#endif /* __ASM_IMAGE_H */
|
||||
@ -16,6 +16,16 @@
|
||||
#define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT)
|
||||
#define PAGE_MASK (~(PAGE_SIZE - 1))
|
||||
|
||||
#ifdef CONFIG_64BIT
|
||||
#define HUGE_MAX_HSTATE 2
|
||||
#else
|
||||
#define HUGE_MAX_HSTATE 1
|
||||
#endif
|
||||
#define HPAGE_SHIFT PMD_SHIFT
|
||||
#define HPAGE_SIZE (_AC(1, UL) << HPAGE_SHIFT)
|
||||
#define HPAGE_MASK (~(HPAGE_SIZE - 1))
|
||||
#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
|
||||
|
||||
/*
|
||||
* PAGE_OFFSET -- the first address of the first page of memory.
|
||||
* When not using MMU this corresponds to the first free page in
|
||||
@ -115,8 +125,4 @@ extern unsigned long min_low_pfn;
|
||||
#include <asm-generic/memory_model.h>
|
||||
#include <asm-generic/getorder.h>
|
||||
|
||||
/* vDSO support */
|
||||
/* We do define AT_SYSINFO_EHDR but don't use the gate mechanism */
|
||||
#define __HAVE_ARCH_GATE_AREA
|
||||
|
||||
#endif /* _ASM_RISCV_PAGE_H */
|
||||
|
||||
@ -70,6 +70,11 @@ static inline pmd_t pfn_pmd(unsigned long pfn, pgprot_t prot)
|
||||
return __pmd((pfn << _PAGE_PFN_SHIFT) | pgprot_val(prot));
|
||||
}
|
||||
|
||||
static inline unsigned long _pmd_pfn(pmd_t pmd)
|
||||
{
|
||||
return pmd_val(pmd) >> _PAGE_PFN_SHIFT;
|
||||
}
|
||||
|
||||
#define pmd_ERROR(e) \
|
||||
pr_err("%s:%d: bad pmd %016lx.\n", __FILE__, __LINE__, pmd_val(e))
|
||||
|
||||
|
||||
@ -59,6 +59,8 @@
|
||||
#define PAGE_KERNEL __pgprot(_PAGE_KERNEL)
|
||||
#define PAGE_KERNEL_EXEC __pgprot(_PAGE_KERNEL | _PAGE_EXEC)
|
||||
|
||||
#define PAGE_TABLE __pgprot(_PAGE_TABLE)
|
||||
|
||||
extern pgd_t swapper_pg_dir[];
|
||||
|
||||
/* MAP_PRIVATE permissions: xwr (copy-on-write) */
|
||||
@ -113,12 +115,16 @@ static inline void pmd_clear(pmd_t *pmdp)
|
||||
set_pmd(pmdp, __pmd(0));
|
||||
}
|
||||
|
||||
|
||||
static inline pgd_t pfn_pgd(unsigned long pfn, pgprot_t prot)
|
||||
{
|
||||
return __pgd((pfn << _PAGE_PFN_SHIFT) | pgprot_val(prot));
|
||||
}
|
||||
|
||||
static inline unsigned long _pgd_pfn(pgd_t pgd)
|
||||
{
|
||||
return pgd_val(pgd) >> _PAGE_PFN_SHIFT;
|
||||
}
|
||||
|
||||
#define pgd_index(addr) (((addr) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1))
|
||||
|
||||
/* Locate an entry in the page global directory */
|
||||
@ -250,6 +256,11 @@ static inline pte_t pte_mkspecial(pte_t pte)
|
||||
return __pte(pte_val(pte) | _PAGE_SPECIAL);
|
||||
}
|
||||
|
||||
static inline pte_t pte_mkhuge(pte_t pte)
|
||||
{
|
||||
return pte;
|
||||
}
|
||||
|
||||
/* Modify page protection bits */
|
||||
static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
|
||||
{
|
||||
@ -396,6 +407,7 @@ static inline int ptep_clear_flush_young(struct vm_area_struct *vma,
|
||||
#define kern_addr_valid(addr) (1) /* FIXME */
|
||||
#endif
|
||||
|
||||
extern void *dtb_early_va;
|
||||
extern void setup_bootmem(void);
|
||||
extern void paging_init(void);
|
||||
|
||||
@ -409,7 +421,7 @@ static inline void pgtable_cache_init(void)
|
||||
#define VMALLOC_START (PAGE_OFFSET - VMALLOC_SIZE)
|
||||
|
||||
/*
|
||||
* Task size is 0x40000000000 for RV64 or 0xb800000 for RV32.
|
||||
* Task size is 0x4000000000 for RV64 or 0xb800000 for RV32.
|
||||
* Note that PGDIR_SIZE must evenly divide TASK_SIZE.
|
||||
*/
|
||||
#ifdef CONFIG_64BIT
|
||||
|
||||
@ -11,9 +11,41 @@
|
||||
#include <asm/thread_info.h>
|
||||
#include <asm/page.h>
|
||||
#include <asm/csr.h>
|
||||
#include <asm/image.h>
|
||||
|
||||
__INIT
|
||||
ENTRY(_start)
|
||||
/*
|
||||
* Image header expected by Linux boot-loaders. The image header data
|
||||
* structure is described in asm/image.h.
|
||||
* Do not modify it without modifying the structure and all bootloaders
|
||||
* that expects this header format!!
|
||||
*/
|
||||
/* jump to start kernel */
|
||||
j _start_kernel
|
||||
/* reserved */
|
||||
.word 0
|
||||
.balign 8
|
||||
#if __riscv_xlen == 64
|
||||
/* Image load offset(2MB) from start of RAM */
|
||||
.dword 0x200000
|
||||
#else
|
||||
/* Image load offset(4MB) from start of RAM */
|
||||
.dword 0x400000
|
||||
#endif
|
||||
/* Effective size of kernel image */
|
||||
.dword _end - _start
|
||||
.dword __HEAD_FLAGS
|
||||
.word RISCV_HEADER_VERSION
|
||||
.word 0
|
||||
.dword 0
|
||||
.asciz RISCV_IMAGE_MAGIC
|
||||
.word 0
|
||||
.balign 4
|
||||
.word 0
|
||||
|
||||
.global _start_kernel
|
||||
_start_kernel:
|
||||
/* Mask all interrupts */
|
||||
csrw CSR_SIE, zero
|
||||
csrw CSR_SIP, zero
|
||||
@ -55,7 +87,9 @@ clear_bss_done:
|
||||
|
||||
/* Initialize page tables and relocate to virtual addresses */
|
||||
la sp, init_thread_union + THREAD_SIZE
|
||||
mv a0, s1
|
||||
call setup_vm
|
||||
la a0, early_pg_dir
|
||||
call relocate
|
||||
|
||||
/* Restore C environment */
|
||||
@ -64,25 +98,23 @@ clear_bss_done:
|
||||
la sp, init_thread_union + THREAD_SIZE
|
||||
|
||||
/* Start the kernel */
|
||||
mv a0, s1
|
||||
call parse_dtb
|
||||
tail start_kernel
|
||||
|
||||
relocate:
|
||||
/* Relocate return address */
|
||||
li a1, PAGE_OFFSET
|
||||
la a0, _start
|
||||
sub a1, a1, a0
|
||||
la a2, _start
|
||||
sub a1, a1, a2
|
||||
add ra, ra, a1
|
||||
|
||||
/* Point stvec to virtual address of intruction after satp write */
|
||||
la a0, 1f
|
||||
add a0, a0, a1
|
||||
csrw CSR_STVEC, a0
|
||||
la a2, 1f
|
||||
add a2, a2, a1
|
||||
csrw CSR_STVEC, a2
|
||||
|
||||
/* Compute satp for kernel page tables, but don't load it yet */
|
||||
la a2, swapper_pg_dir
|
||||
srl a2, a2, PAGE_SHIFT
|
||||
srl a2, a0, PAGE_SHIFT
|
||||
li a1, SATP_MODE
|
||||
or a2, a2, a1
|
||||
|
||||
@ -148,6 +180,7 @@ relocate:
|
||||
fence
|
||||
|
||||
/* Enable virtual memory and relocate to virtual address */
|
||||
la a0, swapper_pg_dir
|
||||
call relocate
|
||||
|
||||
tail smp_callin
|
||||
|
||||
@ -39,11 +39,9 @@ struct screen_info screen_info = {
|
||||
atomic_t hart_lottery;
|
||||
unsigned long boot_cpu_hartid;
|
||||
|
||||
void __init parse_dtb(phys_addr_t dtb_phys)
|
||||
void __init parse_dtb(void)
|
||||
{
|
||||
void *dtb = __va(dtb_phys);
|
||||
|
||||
if (early_init_dt_scan(dtb))
|
||||
if (early_init_dt_scan(dtb_early_va))
|
||||
return;
|
||||
|
||||
pr_err("No DTB passed to the kernel\n");
|
||||
|
||||
@ -92,22 +92,3 @@ const char *arch_vma_name(struct vm_area_struct *vma)
|
||||
return "[vdso]";
|
||||
return NULL;
|
||||
}
|
||||
|
||||
/*
|
||||
* Function stubs to prevent linker errors when AT_SYSINFO_EHDR is defined
|
||||
*/
|
||||
|
||||
int in_gate_area_no_mm(unsigned long addr)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
int in_gate_area(struct mm_struct *mm, unsigned long addr)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
struct vm_area_struct *get_gate_vma(struct mm_struct *mm)
|
||||
{
|
||||
return NULL;
|
||||
}
|
||||
|
||||
@ -12,3 +12,5 @@ obj-y += ioremap.o
|
||||
obj-y += cacheflush.o
|
||||
obj-y += context.o
|
||||
obj-y += sifive_l2_cache.o
|
||||
|
||||
obj-$(CONFIG_HUGETLB_PAGE) += hugetlbpage.o
|
||||
|
||||
44
arch/riscv/mm/hugetlbpage.c
Normal file
44
arch/riscv/mm/hugetlbpage.c
Normal file
@ -0,0 +1,44 @@
|
||||
// SPDX-License-Identifier: GPL-2.0
|
||||
#include <linux/hugetlb.h>
|
||||
#include <linux/err.h>
|
||||
|
||||
int pud_huge(pud_t pud)
|
||||
{
|
||||
return pud_present(pud) &&
|
||||
(pud_val(pud) & (_PAGE_READ | _PAGE_WRITE | _PAGE_EXEC));
|
||||
}
|
||||
|
||||
int pmd_huge(pmd_t pmd)
|
||||
{
|
||||
return pmd_present(pmd) &&
|
||||
(pmd_val(pmd) & (_PAGE_READ | _PAGE_WRITE | _PAGE_EXEC));
|
||||
}
|
||||
|
||||
static __init int setup_hugepagesz(char *opt)
|
||||
{
|
||||
unsigned long ps = memparse(opt, &opt);
|
||||
|
||||
if (ps == HPAGE_SIZE) {
|
||||
hugetlb_add_hstate(HPAGE_SHIFT - PAGE_SHIFT);
|
||||
} else if (IS_ENABLED(CONFIG_64BIT) && ps == PUD_SIZE) {
|
||||
hugetlb_add_hstate(PUD_SHIFT - PAGE_SHIFT);
|
||||
} else {
|
||||
hugetlb_bad_size();
|
||||
pr_err("hugepagesz: Unsupported page size %lu M\n", ps >> 20);
|
||||
return 0;
|
||||
}
|
||||
|
||||
return 1;
|
||||
}
|
||||
__setup("hugepagesz=", setup_hugepagesz);
|
||||
|
||||
#ifdef CONFIG_CONTIG_ALLOC
|
||||
static __init int gigantic_pages_init(void)
|
||||
{
|
||||
/* With CONTIG_ALLOC, we can allocate gigantic pages at runtime */
|
||||
if (IS_ENABLED(CONFIG_64BIT) && !size_to_hstate(1UL << PUD_SHIFT))
|
||||
hugetlb_add_hstate(PUD_SHIFT - PAGE_SHIFT);
|
||||
return 0;
|
||||
}
|
||||
arch_initcall(gigantic_pages_init);
|
||||
#endif
|
||||
@ -1,6 +1,7 @@
|
||||
// SPDX-License-Identifier: GPL-2.0-only
|
||||
/*
|
||||
* Copyright (C) 2012 Regents of the University of California
|
||||
* Copyright (C) 2019 Western Digital Corporation or its affiliates.
|
||||
*/
|
||||
|
||||
#include <linux/init.h>
|
||||
@ -21,6 +22,8 @@ unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)]
|
||||
__page_aligned_bss;
|
||||
EXPORT_SYMBOL(empty_zero_page);
|
||||
|
||||
extern char _start[];
|
||||
|
||||
static void __init zone_sizes_init(void)
|
||||
{
|
||||
unsigned long max_zone_pfns[MAX_NR_ZONES] = { 0, };
|
||||
@ -39,13 +42,6 @@ void setup_zero_page(void)
|
||||
memset((void *)empty_zero_page, 0, PAGE_SIZE);
|
||||
}
|
||||
|
||||
void __init paging_init(void)
|
||||
{
|
||||
setup_zero_page();
|
||||
local_flush_tlb_all();
|
||||
zone_sizes_init();
|
||||
}
|
||||
|
||||
void __init mem_init(void)
|
||||
{
|
||||
#ifdef CONFIG_FLATMEM
|
||||
@ -84,29 +80,20 @@ disable:
|
||||
initrd_start = 0;
|
||||
initrd_end = 0;
|
||||
}
|
||||
|
||||
void __init free_initrd_mem(unsigned long start, unsigned long end)
|
||||
{
|
||||
free_reserved_area((void *)start, (void *)end, -1, "initrd");
|
||||
}
|
||||
#endif /* CONFIG_BLK_DEV_INITRD */
|
||||
|
||||
void __init setup_bootmem(void)
|
||||
{
|
||||
struct memblock_region *reg;
|
||||
phys_addr_t mem_size = 0;
|
||||
phys_addr_t vmlinux_end = __pa(&_end);
|
||||
phys_addr_t vmlinux_start = __pa(&_start);
|
||||
|
||||
/* Find the memory region containing the kernel */
|
||||
for_each_memblock(memory, reg) {
|
||||
phys_addr_t vmlinux_end = __pa(_end);
|
||||
phys_addr_t end = reg->base + reg->size;
|
||||
|
||||
if (reg->base <= vmlinux_end && vmlinux_end <= end) {
|
||||
/*
|
||||
* Reserve from the start of the region to the end of
|
||||
* the kernel
|
||||
*/
|
||||
memblock_reserve(reg->base, vmlinux_end - reg->base);
|
||||
mem_size = min(reg->size, (phys_addr_t)-PAGE_OFFSET);
|
||||
|
||||
/*
|
||||
@ -120,6 +107,9 @@ void __init setup_bootmem(void)
|
||||
}
|
||||
BUG_ON(mem_size == 0);
|
||||
|
||||
/* Reserve from the start of the kernel to the end of the kernel */
|
||||
memblock_reserve(vmlinux_start, vmlinux_end - vmlinux_start);
|
||||
|
||||
set_max_mapnr(PFN_DOWN(mem_size));
|
||||
max_low_pfn = PFN_DOWN(memblock_end_of_DRAM());
|
||||
|
||||
@ -147,17 +137,15 @@ EXPORT_SYMBOL(va_pa_offset);
|
||||
unsigned long pfn_base;
|
||||
EXPORT_SYMBOL(pfn_base);
|
||||
|
||||
void *dtb_early_va;
|
||||
pgd_t swapper_pg_dir[PTRS_PER_PGD] __page_aligned_bss;
|
||||
pgd_t trampoline_pg_dir[PTRS_PER_PGD] __initdata __aligned(PAGE_SIZE);
|
||||
|
||||
#ifndef __PAGETABLE_PMD_FOLDED
|
||||
#define NUM_SWAPPER_PMDS ((uintptr_t)-PAGE_OFFSET >> PGDIR_SHIFT)
|
||||
pmd_t swapper_pmd[PTRS_PER_PMD*((-PAGE_OFFSET)/PGDIR_SIZE)] __page_aligned_bss;
|
||||
pmd_t trampoline_pmd[PTRS_PER_PGD] __initdata __aligned(PAGE_SIZE);
|
||||
pmd_t fixmap_pmd[PTRS_PER_PMD] __page_aligned_bss;
|
||||
#endif
|
||||
|
||||
pgd_t trampoline_pg_dir[PTRS_PER_PGD] __page_aligned_bss;
|
||||
pte_t fixmap_pte[PTRS_PER_PTE] __page_aligned_bss;
|
||||
static bool mmu_enabled;
|
||||
|
||||
#define MAX_EARLY_MAPPING_SIZE SZ_128M
|
||||
|
||||
pgd_t early_pg_dir[PTRS_PER_PGD] __initdata __aligned(PAGE_SIZE);
|
||||
|
||||
void __set_fixmap(enum fixed_addresses idx, phys_addr_t phys, pgprot_t prot)
|
||||
{
|
||||
@ -176,6 +164,156 @@ void __set_fixmap(enum fixed_addresses idx, phys_addr_t phys, pgprot_t prot)
|
||||
}
|
||||
}
|
||||
|
||||
static pte_t *__init get_pte_virt(phys_addr_t pa)
|
||||
{
|
||||
if (mmu_enabled) {
|
||||
clear_fixmap(FIX_PTE);
|
||||
return (pte_t *)set_fixmap_offset(FIX_PTE, pa);
|
||||
} else {
|
||||
return (pte_t *)((uintptr_t)pa);
|
||||
}
|
||||
}
|
||||
|
||||
static phys_addr_t __init alloc_pte(uintptr_t va)
|
||||
{
|
||||
/*
|
||||
* We only create PMD or PGD early mappings so we
|
||||
* should never reach here with MMU disabled.
|
||||
*/
|
||||
BUG_ON(!mmu_enabled);
|
||||
|
||||
return memblock_phys_alloc(PAGE_SIZE, PAGE_SIZE);
|
||||
}
|
||||
|
||||
static void __init create_pte_mapping(pte_t *ptep,
|
||||
uintptr_t va, phys_addr_t pa,
|
||||
phys_addr_t sz, pgprot_t prot)
|
||||
{
|
||||
uintptr_t pte_index = pte_index(va);
|
||||
|
||||
BUG_ON(sz != PAGE_SIZE);
|
||||
|
||||
if (pte_none(ptep[pte_index]))
|
||||
ptep[pte_index] = pfn_pte(PFN_DOWN(pa), prot);
|
||||
}
|
||||
|
||||
#ifndef __PAGETABLE_PMD_FOLDED
|
||||
|
||||
pmd_t trampoline_pmd[PTRS_PER_PMD] __page_aligned_bss;
|
||||
pmd_t fixmap_pmd[PTRS_PER_PMD] __page_aligned_bss;
|
||||
|
||||
#if MAX_EARLY_MAPPING_SIZE < PGDIR_SIZE
|
||||
#define NUM_EARLY_PMDS 1UL
|
||||
#else
|
||||
#define NUM_EARLY_PMDS (1UL + MAX_EARLY_MAPPING_SIZE / PGDIR_SIZE)
|
||||
#endif
|
||||
pmd_t early_pmd[PTRS_PER_PMD * NUM_EARLY_PMDS] __initdata __aligned(PAGE_SIZE);
|
||||
|
||||
static pmd_t *__init get_pmd_virt(phys_addr_t pa)
|
||||
{
|
||||
if (mmu_enabled) {
|
||||
clear_fixmap(FIX_PMD);
|
||||
return (pmd_t *)set_fixmap_offset(FIX_PMD, pa);
|
||||
} else {
|
||||
return (pmd_t *)((uintptr_t)pa);
|
||||
}
|
||||
}
|
||||
|
||||
static phys_addr_t __init alloc_pmd(uintptr_t va)
|
||||
{
|
||||
uintptr_t pmd_num;
|
||||
|
||||
if (mmu_enabled)
|
||||
return memblock_phys_alloc(PAGE_SIZE, PAGE_SIZE);
|
||||
|
||||
pmd_num = (va - PAGE_OFFSET) >> PGDIR_SHIFT;
|
||||
BUG_ON(pmd_num >= NUM_EARLY_PMDS);
|
||||
return (uintptr_t)&early_pmd[pmd_num * PTRS_PER_PMD];
|
||||
}
|
||||
|
||||
static void __init create_pmd_mapping(pmd_t *pmdp,
|
||||
uintptr_t va, phys_addr_t pa,
|
||||
phys_addr_t sz, pgprot_t prot)
|
||||
{
|
||||
pte_t *ptep;
|
||||
phys_addr_t pte_phys;
|
||||
uintptr_t pmd_index = pmd_index(va);
|
||||
|
||||
if (sz == PMD_SIZE) {
|
||||
if (pmd_none(pmdp[pmd_index]))
|
||||
pmdp[pmd_index] = pfn_pmd(PFN_DOWN(pa), prot);
|
||||
return;
|
||||
}
|
||||
|
||||
if (pmd_none(pmdp[pmd_index])) {
|
||||
pte_phys = alloc_pte(va);
|
||||
pmdp[pmd_index] = pfn_pmd(PFN_DOWN(pte_phys), PAGE_TABLE);
|
||||
ptep = get_pte_virt(pte_phys);
|
||||
memset(ptep, 0, PAGE_SIZE);
|
||||
} else {
|
||||
pte_phys = PFN_PHYS(_pmd_pfn(pmdp[pmd_index]));
|
||||
ptep = get_pte_virt(pte_phys);
|
||||
}
|
||||
|
||||
create_pte_mapping(ptep, va, pa, sz, prot);
|
||||
}
|
||||
|
||||
#define pgd_next_t pmd_t
|
||||
#define alloc_pgd_next(__va) alloc_pmd(__va)
|
||||
#define get_pgd_next_virt(__pa) get_pmd_virt(__pa)
|
||||
#define create_pgd_next_mapping(__nextp, __va, __pa, __sz, __prot) \
|
||||
create_pmd_mapping(__nextp, __va, __pa, __sz, __prot)
|
||||
#define PTE_PARENT_SIZE PMD_SIZE
|
||||
#define fixmap_pgd_next fixmap_pmd
|
||||
#else
|
||||
#define pgd_next_t pte_t
|
||||
#define alloc_pgd_next(__va) alloc_pte(__va)
|
||||
#define get_pgd_next_virt(__pa) get_pte_virt(__pa)
|
||||
#define create_pgd_next_mapping(__nextp, __va, __pa, __sz, __prot) \
|
||||
create_pte_mapping(__nextp, __va, __pa, __sz, __prot)
|
||||
#define PTE_PARENT_SIZE PGDIR_SIZE
|
||||
#define fixmap_pgd_next fixmap_pte
|
||||
#endif
|
||||
|
||||
static void __init create_pgd_mapping(pgd_t *pgdp,
|
||||
uintptr_t va, phys_addr_t pa,
|
||||
phys_addr_t sz, pgprot_t prot)
|
||||
{
|
||||
pgd_next_t *nextp;
|
||||
phys_addr_t next_phys;
|
||||
uintptr_t pgd_index = pgd_index(va);
|
||||
|
||||
if (sz == PGDIR_SIZE) {
|
||||
if (pgd_val(pgdp[pgd_index]) == 0)
|
||||
pgdp[pgd_index] = pfn_pgd(PFN_DOWN(pa), prot);
|
||||
return;
|
||||
}
|
||||
|
||||
if (pgd_val(pgdp[pgd_index]) == 0) {
|
||||
next_phys = alloc_pgd_next(va);
|
||||
pgdp[pgd_index] = pfn_pgd(PFN_DOWN(next_phys), PAGE_TABLE);
|
||||
nextp = get_pgd_next_virt(next_phys);
|
||||
memset(nextp, 0, PAGE_SIZE);
|
||||
} else {
|
||||
next_phys = PFN_PHYS(_pgd_pfn(pgdp[pgd_index]));
|
||||
nextp = get_pgd_next_virt(next_phys);
|
||||
}
|
||||
|
||||
create_pgd_next_mapping(nextp, va, pa, sz, prot);
|
||||
}
|
||||
|
||||
static uintptr_t __init best_map_size(phys_addr_t base, phys_addr_t size)
|
||||
{
|
||||
uintptr_t map_size = PAGE_SIZE;
|
||||
|
||||
/* Upgrade to PMD/PGDIR mappings whenever possible */
|
||||
if (!(base & (PTE_PARENT_SIZE - 1)) &&
|
||||
!(size & (PTE_PARENT_SIZE - 1)))
|
||||
map_size = PTE_PARENT_SIZE;
|
||||
|
||||
return map_size;
|
||||
}
|
||||
|
||||
/*
|
||||
* setup_vm() is called from head.S with MMU-off.
|
||||
*
|
||||
@ -195,55 +333,115 @@ void __set_fixmap(enum fixed_addresses idx, phys_addr_t phys, pgprot_t prot)
|
||||
"not use absolute addressing."
|
||||
#endif
|
||||
|
||||
asmlinkage void __init setup_vm(void)
|
||||
asmlinkage void __init setup_vm(uintptr_t dtb_pa)
|
||||
{
|
||||
extern char _start;
|
||||
uintptr_t i;
|
||||
uintptr_t pa = (uintptr_t) &_start;
|
||||
pgprot_t prot = __pgprot(pgprot_val(PAGE_KERNEL) | _PAGE_EXEC);
|
||||
uintptr_t va, end_va;
|
||||
uintptr_t load_pa = (uintptr_t)(&_start);
|
||||
uintptr_t load_sz = (uintptr_t)(&_end) - load_pa;
|
||||
uintptr_t map_size = best_map_size(load_pa, MAX_EARLY_MAPPING_SIZE);
|
||||
|
||||
va_pa_offset = PAGE_OFFSET - pa;
|
||||
pfn_base = PFN_DOWN(pa);
|
||||
va_pa_offset = PAGE_OFFSET - load_pa;
|
||||
pfn_base = PFN_DOWN(load_pa);
|
||||
|
||||
/*
|
||||
* Enforce boot alignment requirements of RV32 and
|
||||
* RV64 by only allowing PMD or PGD mappings.
|
||||
*/
|
||||
BUG_ON(map_size == PAGE_SIZE);
|
||||
|
||||
/* Sanity check alignment and size */
|
||||
BUG_ON((PAGE_OFFSET % PGDIR_SIZE) != 0);
|
||||
BUG_ON((pa % (PAGE_SIZE * PTRS_PER_PTE)) != 0);
|
||||
BUG_ON((load_pa % map_size) != 0);
|
||||
BUG_ON(load_sz > MAX_EARLY_MAPPING_SIZE);
|
||||
|
||||
/* Setup early PGD for fixmap */
|
||||
create_pgd_mapping(early_pg_dir, FIXADDR_START,
|
||||
(uintptr_t)fixmap_pgd_next, PGDIR_SIZE, PAGE_TABLE);
|
||||
|
||||
#ifndef __PAGETABLE_PMD_FOLDED
|
||||
trampoline_pg_dir[(PAGE_OFFSET >> PGDIR_SHIFT) % PTRS_PER_PGD] =
|
||||
pfn_pgd(PFN_DOWN((uintptr_t)trampoline_pmd),
|
||||
__pgprot(_PAGE_TABLE));
|
||||
trampoline_pmd[0] = pfn_pmd(PFN_DOWN(pa), prot);
|
||||
|
||||
for (i = 0; i < (-PAGE_OFFSET)/PGDIR_SIZE; ++i) {
|
||||
size_t o = (PAGE_OFFSET >> PGDIR_SHIFT) % PTRS_PER_PGD + i;
|
||||
|
||||
swapper_pg_dir[o] =
|
||||
pfn_pgd(PFN_DOWN((uintptr_t)swapper_pmd) + i,
|
||||
__pgprot(_PAGE_TABLE));
|
||||
}
|
||||
for (i = 0; i < ARRAY_SIZE(swapper_pmd); i++)
|
||||
swapper_pmd[i] = pfn_pmd(PFN_DOWN(pa + i * PMD_SIZE), prot);
|
||||
|
||||
swapper_pg_dir[(FIXADDR_START >> PGDIR_SHIFT) % PTRS_PER_PGD] =
|
||||
pfn_pgd(PFN_DOWN((uintptr_t)fixmap_pmd),
|
||||
__pgprot(_PAGE_TABLE));
|
||||
fixmap_pmd[(FIXADDR_START >> PMD_SHIFT) % PTRS_PER_PMD] =
|
||||
pfn_pmd(PFN_DOWN((uintptr_t)fixmap_pte),
|
||||
__pgprot(_PAGE_TABLE));
|
||||
/* Setup fixmap PMD */
|
||||
create_pmd_mapping(fixmap_pmd, FIXADDR_START,
|
||||
(uintptr_t)fixmap_pte, PMD_SIZE, PAGE_TABLE);
|
||||
/* Setup trampoline PGD and PMD */
|
||||
create_pgd_mapping(trampoline_pg_dir, PAGE_OFFSET,
|
||||
(uintptr_t)trampoline_pmd, PGDIR_SIZE, PAGE_TABLE);
|
||||
create_pmd_mapping(trampoline_pmd, PAGE_OFFSET,
|
||||
load_pa, PMD_SIZE, PAGE_KERNEL_EXEC);
|
||||
#else
|
||||
trampoline_pg_dir[(PAGE_OFFSET >> PGDIR_SHIFT) % PTRS_PER_PGD] =
|
||||
pfn_pgd(PFN_DOWN(pa), prot);
|
||||
/* Setup trampoline PGD */
|
||||
create_pgd_mapping(trampoline_pg_dir, PAGE_OFFSET,
|
||||
load_pa, PGDIR_SIZE, PAGE_KERNEL_EXEC);
|
||||
#endif
|
||||
|
||||
for (i = 0; i < (-PAGE_OFFSET)/PGDIR_SIZE; ++i) {
|
||||
size_t o = (PAGE_OFFSET >> PGDIR_SHIFT) % PTRS_PER_PGD + i;
|
||||
/*
|
||||
* Setup early PGD covering entire kernel which will allows
|
||||
* us to reach paging_init(). We map all memory banks later
|
||||
* in setup_vm_final() below.
|
||||
*/
|
||||
end_va = PAGE_OFFSET + load_sz;
|
||||
for (va = PAGE_OFFSET; va < end_va; va += map_size)
|
||||
create_pgd_mapping(early_pg_dir, va,
|
||||
load_pa + (va - PAGE_OFFSET),
|
||||
map_size, PAGE_KERNEL_EXEC);
|
||||
|
||||
swapper_pg_dir[o] =
|
||||
pfn_pgd(PFN_DOWN(pa + i * PGDIR_SIZE), prot);
|
||||
/* Create fixed mapping for early FDT parsing */
|
||||
end_va = __fix_to_virt(FIX_FDT) + FIX_FDT_SIZE;
|
||||
for (va = __fix_to_virt(FIX_FDT); va < end_va; va += PAGE_SIZE)
|
||||
create_pte_mapping(fixmap_pte, va,
|
||||
dtb_pa + (va - __fix_to_virt(FIX_FDT)),
|
||||
PAGE_SIZE, PAGE_KERNEL);
|
||||
|
||||
/* Save pointer to DTB for early FDT parsing */
|
||||
dtb_early_va = (void *)fix_to_virt(FIX_FDT) + (dtb_pa & ~PAGE_MASK);
|
||||
}
|
||||
|
||||
static void __init setup_vm_final(void)
|
||||
{
|
||||
uintptr_t va, map_size;
|
||||
phys_addr_t pa, start, end;
|
||||
struct memblock_region *reg;
|
||||
|
||||
/* Set mmu_enabled flag */
|
||||
mmu_enabled = true;
|
||||
|
||||
/* Setup swapper PGD for fixmap */
|
||||
create_pgd_mapping(swapper_pg_dir, FIXADDR_START,
|
||||
__pa(fixmap_pgd_next),
|
||||
PGDIR_SIZE, PAGE_TABLE);
|
||||
|
||||
/* Map all memory banks */
|
||||
for_each_memblock(memory, reg) {
|
||||
start = reg->base;
|
||||
end = start + reg->size;
|
||||
|
||||
if (start >= end)
|
||||
break;
|
||||
if (memblock_is_nomap(reg))
|
||||
continue;
|
||||
if (start <= __pa(PAGE_OFFSET) &&
|
||||
__pa(PAGE_OFFSET) < end)
|
||||
start = __pa(PAGE_OFFSET);
|
||||
|
||||
map_size = best_map_size(start, end - start);
|
||||
for (pa = start; pa < end; pa += map_size) {
|
||||
va = (uintptr_t)__va(pa);
|
||||
create_pgd_mapping(swapper_pg_dir, va, pa,
|
||||
map_size, PAGE_KERNEL_EXEC);
|
||||
}
|
||||
}
|
||||
|
||||
swapper_pg_dir[(FIXADDR_START >> PGDIR_SHIFT) % PTRS_PER_PGD] =
|
||||
pfn_pgd(PFN_DOWN((uintptr_t)fixmap_pte),
|
||||
__pgprot(_PAGE_TABLE));
|
||||
#endif
|
||||
/* Clear fixmap PTE and PMD mappings */
|
||||
clear_fixmap(FIX_PTE);
|
||||
clear_fixmap(FIX_PMD);
|
||||
|
||||
/* Move to swapper page table */
|
||||
csr_write(sptbr, PFN_DOWN(__pa(swapper_pg_dir)) | SATP_MODE);
|
||||
local_flush_tlb_all();
|
||||
}
|
||||
|
||||
void __init paging_init(void)
|
||||
{
|
||||
setup_vm_final();
|
||||
setup_zero_page();
|
||||
zone_sizes_init();
|
||||
}
|
||||
|
||||
@ -109,13 +109,14 @@ EXPORT_SYMBOL_GPL(unregister_sifive_l2_error_notifier);
|
||||
|
||||
static irqreturn_t l2_int_handler(int irq, void *device)
|
||||
{
|
||||
unsigned int regval, add_h, add_l;
|
||||
unsigned int add_h, add_l;
|
||||
|
||||
if (irq == g_irq[DIR_CORR]) {
|
||||
add_h = readl(l2_base + SIFIVE_L2_DIRECCFIX_HIGH);
|
||||
add_l = readl(l2_base + SIFIVE_L2_DIRECCFIX_LOW);
|
||||
pr_err("L2CACHE: DirError @ 0x%08X.%08X\n", add_h, add_l);
|
||||
regval = readl(l2_base + SIFIVE_L2_DIRECCFIX_COUNT);
|
||||
/* Reading this register clears the DirError interrupt sig */
|
||||
readl(l2_base + SIFIVE_L2_DIRECCFIX_COUNT);
|
||||
atomic_notifier_call_chain(&l2_err_chain, SIFIVE_L2_ERR_TYPE_CE,
|
||||
"DirECCFix");
|
||||
}
|
||||
@ -123,7 +124,8 @@ static irqreturn_t l2_int_handler(int irq, void *device)
|
||||
add_h = readl(l2_base + SIFIVE_L2_DATECCFIX_HIGH);
|
||||
add_l = readl(l2_base + SIFIVE_L2_DATECCFIX_LOW);
|
||||
pr_err("L2CACHE: DataError @ 0x%08X.%08X\n", add_h, add_l);
|
||||
regval = readl(l2_base + SIFIVE_L2_DATECCFIX_COUNT);
|
||||
/* Reading this register clears the DataError interrupt sig */
|
||||
readl(l2_base + SIFIVE_L2_DATECCFIX_COUNT);
|
||||
atomic_notifier_call_chain(&l2_err_chain, SIFIVE_L2_ERR_TYPE_CE,
|
||||
"DatECCFix");
|
||||
}
|
||||
@ -131,7 +133,8 @@ static irqreturn_t l2_int_handler(int irq, void *device)
|
||||
add_h = readl(l2_base + SIFIVE_L2_DATECCFAIL_HIGH);
|
||||
add_l = readl(l2_base + SIFIVE_L2_DATECCFAIL_LOW);
|
||||
pr_err("L2CACHE: DataFail @ 0x%08X.%08X\n", add_h, add_l);
|
||||
regval = readl(l2_base + SIFIVE_L2_DATECCFAIL_COUNT);
|
||||
/* Reading this register clears the DataFail interrupt sig */
|
||||
readl(l2_base + SIFIVE_L2_DATECCFAIL_COUNT);
|
||||
atomic_notifier_call_chain(&l2_err_chain, SIFIVE_L2_ERR_TYPE_UE,
|
||||
"DatECCFail");
|
||||
}
|
||||
|
||||
@ -94,6 +94,7 @@ config X86
|
||||
select ARCH_USE_QUEUED_SPINLOCKS
|
||||
select ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH
|
||||
select ARCH_WANTS_DYNAMIC_TASK_STRUCT
|
||||
select ARCH_WANT_HUGE_PMD_SHARE
|
||||
select ARCH_WANTS_THP_SWAP if X86_64
|
||||
select BUILDTIME_EXTABLE_SORT
|
||||
select CLKEVT_I8253
|
||||
@ -307,9 +308,6 @@ config ARCH_HIBERNATION_POSSIBLE
|
||||
config ARCH_SUSPEND_POSSIBLE
|
||||
def_bool y
|
||||
|
||||
config ARCH_WANT_HUGE_PMD_SHARE
|
||||
def_bool y
|
||||
|
||||
config ARCH_WANT_GENERAL_HUGETLB
|
||||
def_bool y
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user