[0/5] Fixmap support and MM cleanups

Message

Anup Patel Jan. 7, 2019, 4:10 p.m. UTC

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