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stm32mp: Increase the reserved memory in board_get_usable_ram_top

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Add 8M for the U-Boot reserved memory (display, fdt, gd, ...)
mapped cacheable before relocation.

Without this patch the device tree, located before the MALLOC area
is not tagged cacheable just after relocation, before mmu reconfiguration.

This patch reduces the duration for device tree parsing in
lmb_init_and_reserve.

Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
This commit is contained in:
Patrick Delaunay 2021-05-07 14:50:34 +02:00 committed by Tom Rini
parent f46959cef4
commit 7dc6068fc1
1 changed files with 5 additions and 2 deletions
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7
arch/arm/mach-stm32mp/dram_init.c
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@ -50,13 +50,16 @@ ulong board_get_usable_ram_top(ulong total_size)
lmb_init(&lmb);
lmb_add(&lmb, gd->ram_base, gd->ram_size);
boot_fdt_add_mem_rsv_regions(&lmb, (void *)gd->fdt_blob);
size = ALIGN(CONFIG_SYS_MALLOC_LEN + total_size, MMU_SECTION_SIZE),
/* add 8M for reserved memory for display, fdt, gd,... */
size = ALIGN(SZ_8M + CONFIG_SYS_MALLOC_LEN + total_size, MMU_SECTION_SIZE),
reg = lmb_alloc(&lmb, size, MMU_SECTION_SIZE);
if (!reg)
reg = gd->ram_top - size;
mmu_set_region_dcache_behaviour(reg, size, DCACHE_DEFAULT_OPTION);
/* before relocation, mark the U-Boot memory as cacheable by default */
if (!(gd->flags & GD_FLG_RELOC))
mmu_set_region_dcache_behaviour(reg, size, DCACHE_DEFAULT_OPTION);
return reg + size;
}