Traverse the reserved memory map and map areas which are marked with uncached as uncached (and thus noexec).
Signed-off-by: Rouven Czerwinski <[email protected]> --- arch/arm/cpu/mmu.c | 14 ++++++++++++++ include/of.h | 5 +++++ 2 files changed, 19 insertions(+) diff --git a/arch/arm/cpu/mmu.c b/arch/arm/cpu/mmu.c index 6af228505d..5974e1e38a 100644 --- a/arch/arm/cpu/mmu.c +++ b/arch/arm/cpu/mmu.c @@ -17,6 +17,7 @@ #include <memory.h> #include <asm/system_info.h> #include <asm/sections.h> +#include <of.h> #include "mmu.h" @@ -393,6 +394,8 @@ static void vectors_init(void) void __mmu_init(bool mmu_on) { struct memory_bank *bank; + struct of_reserve_map *res_map; + int i; arm_set_cache_functions(); @@ -453,6 +456,17 @@ void __mmu_init(bool mmu_on) __mmu_cache_flush(); } + res_map = of_get_reserve_map(); + if (res_map) { + for (i = 0; i < res_map->num_entries; i++) { + if (res_map->uncached & BIT(i)) { + create_sections(ttb, res_map->start[i], + res_map->end[i], + PMD_SECT_DEF_UNCACHED); + } + } + } + __mmu_cache_on(); } diff --git a/include/of.h b/include/of.h index 5d7f54fb36..3d8c26f319 100644 --- a/include/of.h +++ b/include/of.h @@ -1042,6 +1042,11 @@ static inline int of_firmware_load_overlay(struct device_node *overlay, const ch { return -ENOSYS; } + +static inline struct of_reserve_map *of_get_reserve_map(void) +{ + return NULL; +} #endif #endif /* __OF_H */ -- 2.28.0 _______________________________________________ barebox mailing list [email protected] http://lists.infradead.org/mailman/listinfo/barebox
