[PATCH -next v6 0/9] Add support for dynamic MMU configuration

[Wadim Egorov]

On 9/5/25 11:18 AM, Anshul Dalal wrote:
> Hi all,
> 
> In U-Boot, TI only provides a single memory map for all k3 platforms, this
> does not scale for devices where atf and optee lie outside the range 0x80000000
> - 0x80080000 and 0x9e780000 - 0xa0000000 respectively.
> 
> There are also issues for devices with < 2GiB of memory (eg am62SiP with 512MiB
> of RAM) as the maximum size for the first DRAM bank is hardcoded to 2GiB.
> Furthermore the second DRAM bank is mapped even for devices that only have one.
> 
> Therefore this patch set adds the required functionality to create the MMU table
> at runtime.
> 
> The patch set has been build tested on all effected platforms but boot-tested
> only on TI's K3 EVMs and the beagleplay.
> 
> The following effected boards have not been boot tested:
>   - phycore-am62a
>   - phycore-am62x
>   - phycore-am64x
>   - verdin-am62
>   - iot2050
> 
> Depends on:
>    [PATCH v1] mach-k3: fix reading size and addr from fdt on R5
>    https://lore.kernel.org/u-boot/20250903111704.530700-1-anshuld@ti.com/

For this series,

Tested-by: Wadim Egorov <w.egorov at phytec.de> # phycore-am6*


> 
> Best Wishes,
> Anshul
> ---
> Changes in v6:
>   - Make use of generic MMU APIs
>   - Extend core U-Boot functionality by adding mmu_unmap_reserved_mem and
>     mem_map_fix_dram_banks
>   - Keep same memory maps for SPL and U-Boot proper
>   - Add fdt fixups from SPL stage for reserved memory nodes
> v5: https://lore.kernel.org/u-boot/20250703133533.104758-1-anshuld@ti.com/
> 
> Changes in v5:
>   - Don't create carveouts for every reserved-memory node
>   - Only create carveouts for ATF/OP-TEE
>   - Expand the call to k3_mem_map_init to vendor boards as well
>   - Map area for framebuffer for CONFIG_VIDEO=y platforms
> v4: https://lore.kernel.org/u-boot/20250618124210.1936140-1-anshuld@ti.com/
> 
> Changes for v4:
>   - Add call to k3_mem_map_init for beagleplay
>   - Mark reserved regions as non-cacheable
>   - More debug logs
> v3: https://lore.kernel.org/u-boot/20250617135844.2873701-1-anshuld@ti.com/
> 
> Changes for v3:
>   - Remove unused memory regions in SPL's map
>   - Add runtime addition of MMU entry for the framebuffer in SPL
>   - Refactor k3_mem_map_init to use standard u-boot APIs
>   - Unmap reserved-memory regions instead of keeping them uncached
> v2: https://lore.kernel.org/u-boot/20250610160833.1705534-1-anshuld@ti.com/
> 
> Changes in v2:
> - Removed dependency to:
>    https://lore.kernel.org/u-boot/20250522150941.563959-1-anshuld@ti.com/
> v1: https://lore.kernel.org/u-boot/20250602120054.1466951-1-anshuld@ti.com/
> ---
> Anshul Dalal (9):
>    mach-k3: use minimal memory map for all K3
>    mach-k3: use custom enable_cache
>    arm: armv8: mmu: export mmu_setup
>    arm: armv8: mmu: add mem_map_fix_dram_banks
>    mach-k3: map all banks using mem_map_fix_dram_banks
>    arm: armv8: mmu: add mmu_unmap_reserved_mem
>    spl: split spl_board_fixups to arch/board specific
>    mach-k3: add reserved memory fixups for next boot stage
>    mach-k3: add carveouts for TFA and optee
> 
>   arch/arm/cpu/armv7m/cpu.c                  |  2 +-
>   arch/arm/cpu/armv8/cache_v8.c              | 50 ++++++++++++++++++++
>   arch/arm/include/asm/armv8/mmu.h           | 24 ++++++++++
>   arch/arm/mach-k3/arm64/arm64-mmu.c         | 35 +++++---------
>   arch/arm/mach-k3/common.c                  | 55 ++++++++++++++++++++++
>   arch/arm/mach-k3/include/mach/k3-ddr.h     |  6 +++
>   arch/arm/mach-rockchip/spl-boot-order.c    |  2 +-
>   arch/arm/mach-socfpga/spl_soc64.c          |  2 +-
>   board/beagle/beagley-ai/beagley-ai.c       |  2 +-
>   board/dhelectronics/dh_stm32mp1/board.c    |  2 +-
>   board/phytec/phycore_am62x/phycore-am62x.c |  2 +-
>   board/phytec/phycore_am64x/phycore-am64x.c |  2 +-
>   board/renesas/sparrowhawk/sparrowhawk.c    |  2 +-
>   board/starfive/visionfive2/spl.c           |  2 +-
>   board/ti/am62ax/evm.c                      |  2 +-
>   board/ti/am62px/evm.c                      |  2 +-
>   board/ti/am62x/evm.c                       |  2 +-
>   board/ti/am64x/evm.c                       |  2 +-
>   board/ti/j721e/evm.c                       |  2 +-
>   board/ti/j721s2/evm.c                      |  2 +-
>   board/ti/j722s/evm.c                       |  2 +-
>   board/ti/j784s4/evm.c                      |  2 +-
>   common/spl/spl.c                           | 12 +++--
>   include/spl.h                              | 12 +++--
>   24 files changed, 182 insertions(+), 46 deletions(-)
>