[PATCH 0/5] Fixmap support and MM cleanups

Anup Patel
2019-01-07T16:11:10Z

This patchset does:
1. Moves MM related code from kernel/setup.c to mm/init.c
2. Implements compile-time fixed mappings

Using fixed mappings available, we can now get earlyprints
even without SBI calls. For example, we can use kernel
parameter "earlycon=uart8250,mmio,0x10000000" to get early
prints on QEMU virt machine without using SBI calls.

The patchset is tested on QEMU virt machine. It is based on
Linux-5.0-rc1 and can be found at riscv_fixmap_v1 branch of:
https://github.com/avpatel/linux.git.

Anup Patel (5):
RISC-V: Move free_initrd_mem() to kernel/setup.c
RISC-V: Setup init_mm before parse_early_param()
RISC-V: Move setup_bootmem() to mm/init.c
RISC-V: Move setup_vm() to mm/init.c
RISC-V: Implement compile-time fixed mappings

arch/riscv/Kconfig | 3 +
arch/riscv/include/asm/fixmap.h | 52 +++++++++++++
arch/riscv/include/asm/pgtable.h | 1 +
arch/riscv/kernel/setup.c | 106 +++-----------------------
arch/riscv/mm/init.c | 123 ++++++++++++++++++++++++++++++-
5 files changed, 186 insertions(+), 99 deletions(-)
create mode 100644 arch/riscv/include/asm/fixmap.h

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2.17.1