This patch series is really three different ones, but they unite around
the need for (and the implementation) of more flexible control of memory
allocation on UEFI systems.
1: Adding new interfaces
- A function for detecting the start address of RAM
Since ARM platforms have no standardised memory map, implement a
function that picks the lowest-address region supporting the
write-back cache atribute from the UEFI memory map.
- Implement and expose a new memory allocation function giving access to
the allocation type and memory type arguments to the AllocatePages
boot service.
2: ARM unification
- The fdt helper library for arm64-efi is really an efi/fdt function.
So move it to neutral ground in loader/efi.
- The arm64 efi linux loader was written for arm64 only, so clean it up a
bit with regards to 32/64-bit portability, and abstract out some
definitions and function prototypes.
- Move the arm efi port to use the arm64 linux loader instead of the one
shared with the u-boot port. Clean up the u-boot loder by deleting the
efi-specific bits and other code only used by that.
3: Correctness improvements
- There are some restrictions on the placement of initrd images in
relation to the runtime kernel images, for both arm and arm64 - but the
arm64 one did not use to be explicitly documented (and only triggerable
on systems with > 40GB of RAM), and the u-boot loader always placed the
images nearly adjacent. Use the new interfaces to place the initrd as
approrpiate for each architecture.
- The allocation of memory for the grub heap is done of memory type
GRUB_EFI_LOADER_DATA. Since UEFI can return memory with non-executable
mappings for this request, and modules are loaded onto the heap, change
this allocation to GRUB_EFI_LOADER_CODE instead.
I first sent this series out on 28 February this year.
Changes since previous submission:
- Rebased (to deal with arm coreboot upstream changes).
- Moved EFI page size definitions to common header.
- Moved a few stray 32/64-bit fixes from 3/7 to 4/7.
Leif Lindholm (7):
efi: add grub_efi_get_dram_base() function for arm*
efi: refactor grub_efi_allocate_pages
efi: move fdt helper library
arm64: make efi linux loader more generic
arm: reuse arm64 linux loader on efi systems
efi: restrict arm/arm64 linux loader initrd placement
efi: change heap allocation type to GRUB_EFI_LOADER_CODE
grub-core/Makefile.am | 1 -
grub-core/Makefile.core.def | 6 +-
grub-core/kern/arm/efi/misc.c | 202 ----------------------------------
grub-core/kern/efi/mm.c | 92 ++++++++++++----
grub-core/loader/arm/linux.c | 39 +------
grub-core/loader/arm64/linux.c | 73 ++++++++----
grub-core/loader/arm64/xen_boot.c | 15 +--
grub-core/loader/{arm64 => efi}/fdt.c | 11 +-
include/grub/arm/efi/loader.h | 26 -----
include/grub/arm/efi/memory.h | 3 +
include/grub/arm/linux.h | 30 ++---
include/grub/arm64/linux.h | 13 +--
include/grub/efi/efi.h | 10 ++
include/grub/{arm64 => efi}/fdtload.h | 3 -
include/grub/efi/memory.h | 3 +
include/grub/efi/pe32.h | 2 +
16 files changed, 176 insertions(+), 353 deletions(-)
delete mode 100644 grub-core/kern/arm/efi/misc.c
rename grub-core/loader/{arm64 => efi}/fdt.c (93%)
delete mode 100644 include/grub/arm/efi/loader.h
rename include/grub/{arm64 => efi}/fdtload.h (89%)
--
2.11.0
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