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)
