From ec1c6cfb1cfce92909a248f10c36bd8b18894d7e Mon Sep 17 00:00:00 2001 From: Ilias Apalodimas Date: Thu, 20 Feb 2025 15:54:42 +0200 Subject: treewide: Add a function to change page permissions For armv8 we are adding proper page permissions for the relocated U-Boot binary. Add a weak function that can be used across architectures to change the page permissions Tested-by: Neil Armstrong # on AML-S905X-CC Signed-off-by: Ilias Apalodimas --- include/cpu_func.h | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) (limited to 'include/cpu_func.h') diff --git a/include/cpu_func.h b/include/cpu_func.h index 7e81c4364a7..70a41ead3f7 100644 --- a/include/cpu_func.h +++ b/include/cpu_func.h @@ -69,6 +69,23 @@ void flush_dcache_range(unsigned long start, unsigned long stop); void invalidate_dcache_range(unsigned long start, unsigned long stop); void invalidate_dcache_all(void); void invalidate_icache_all(void); + +enum pgprot_attrs { + MMU_ATTR_RO, + MMU_ATTR_RX, + MMU_ATTR_RW, +}; + +/** pgprot_set_attrs() - Set page table permissions + * + * @addr: Physical address start + * @size: size of memory to change + * @perm: New permissions + * + * Return: 0 on success, error otherwise. + **/ +int pgprot_set_attrs(phys_addr_t addr, size_t size, enum pgprot_attrs perm); + /** * noncached_init() - Initialize non-cached memory region * -- cgit v1.2.3