On 09/08/2024 01:59, Caleb Connolly wrote:
Supporting the newer SM8550 and SM8650 SoCs unfortunately requires a bump in complexity for us. Qualcomm changed a lot about how the memory map is handed over to the "kernel", adding many holes, not mapping certain regions, and adding regions with 0 size. The SM8650 HDK has a whopping 14 memory regions, some as small as 44k.
Supporting this properly has proven to be a bit of a headache, but I think this implementation is "pretty good".
In addition, we set a valid fallback fdt_addr_r in the U-Boot environment, allocate a buffer for fastboot, and set the loadaddr variable too.
board_fdt_blob_setup() is refactored for readability and potential future expansion (e.g. if supporting multi-dtb FIT becomes desirable).
Finally, a function is proposed to allow for mapping new memory regions at runtime, and the cmd-db driver makes use of it to map itself, since SM8650 boards don't seem to include it in their memory map.
Tested on SM8650 HDK, SDM845 OnePlus 6, SM6115 RB2, SM8250 RB5.
Caleb Connolly (10): mach-snapdragon: refactor board_fdt_blob_setup() mach-snapdragon: parse memory ourselves mach-snapdragon: set serial number mach-snapdragon: allocate fastboot buffer dynamically mach-snapdragon: populate fallback FDT mach-snapdragon: set loadaddr armv8: mmu: add a way to map additional regions soc: qcom: cmd-db: use strncmp() instead of memcmp() soc: qcom: cmd-db: map cmd-db region qcom_defconfig: bump CONFIG_NR_DRAM_BANKS
Neil Armstrong (1): mach-snapdragon: use 1MiB for get_page_table_size()
arch/arm/cpu/armv8/cache_v8.c | 25 +++++ arch/arm/include/asm/system.h | 10 ++ arch/arm/mach-snapdragon/board.c | 203 ++++++++++++++++++++++++++++++++++----- configs/qcom_defconfig | 1 + drivers/soc/qcom/cmd-db.c | 11 ++- 5 files changed, 221 insertions(+), 29 deletions(-)
change-id: 20240809-b4-snapdragon-improvements-fd6d714a7fbd base-commit: a2ce853383b18a2cf920268ee341f2585a11adef
// Caleb (they/them)
Thanks for posting those :-)
Please add my: Reviewed-by: Neil Armstrong neil.armstrong@linaro.org
I'll rebase my tree and test it ASAP !
Neil