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| author | Patrice Chotard <patrice.chotard@foss.st.com> | 2023-10-27 16:42:59 +0200 |
|---|---|---|
| committer | Patrice Chotard <patrice.chotard@foss.st.com> | 2023-11-13 10:55:38 +0100 |
| commit | 75ba0fd570c850b92dfd43d873bab877b4a1b73b (patch) | |
| tree | beb036e56c9531e477ec32a3105e9436a358664f /arch/arm/mach-stm32mp | |
| parent | ee15c72da261b2d4b27ffcdccc2af8b2797c37fc (diff) | |
| download | u-boot-75ba0fd570c850b92dfd43d873bab877b4a1b73b.zip u-boot-75ba0fd570c850b92dfd43d873bab877b4a1b73b.tar.gz u-boot-75ba0fd570c850b92dfd43d873bab877b4a1b73b.tar.bz2 | |
stm32mp: dram_init: Limit DDR usage under 4GB boundary for STM32MP
Limit DDR usage under 4GB boundary on STM32MP regardless of
memory size declared in device tree.
Signed-off-by: Patrice Chotard <patrice.chotard@foss.st.com>
Reviewed-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Diffstat (limited to 'arch/arm/mach-stm32mp')
| -rw-r--r-- | arch/arm/mach-stm32mp/dram_init.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/arch/arm/mach-stm32mp/dram_init.c b/arch/arm/mach-stm32mp/dram_init.c index cb35ed6..fb1208f 100644 --- a/arch/arm/mach-stm32mp/dram_init.c +++ b/arch/arm/mach-stm32mp/dram_init.c @@ -52,9 +52,15 @@ phys_addr_t board_get_usable_ram_top(phys_size_t total_size) if (!total_size) return gd->ram_top; + /* + * make sure U-Boot uses address space below 4GB boundaries even + * if the effective available memory is bigger + */ + gd->ram_top = clamp_val(gd->ram_top, 0, SZ_4G - 1); + /* found enough not-reserved memory to relocated U-Boot */ lmb_init(&lmb); - lmb_add(&lmb, gd->ram_base, get_effective_memsize()); + lmb_add(&lmb, gd->ram_base, gd->ram_top - gd->ram_base); boot_fdt_add_mem_rsv_regions(&lmb, (void *)gd->fdt_blob); /* add 8M for reserved memory for display, fdt, gd,... */ size = ALIGN(SZ_8M + CONFIG_SYS_MALLOC_LEN + total_size, MMU_SECTION_SIZE), |