162306a36Sopenharmony_ci// SPDX-License-Identifier: GPL-2.0-only 262306a36Sopenharmony_ci 362306a36Sopenharmony_ci#include <linux/mm.h> 462306a36Sopenharmony_ci#include <linux/io.h> 562306a36Sopenharmony_ci 662306a36Sopenharmony_civoid __iomem *ioremap_prot(phys_addr_t phys_addr, size_t size, 762306a36Sopenharmony_ci unsigned long prot) 862306a36Sopenharmony_ci{ 962306a36Sopenharmony_ci unsigned long last_addr = phys_addr + size - 1; 1062306a36Sopenharmony_ci 1162306a36Sopenharmony_ci /* Don't allow outside PHYS_MASK */ 1262306a36Sopenharmony_ci if (last_addr & ~PHYS_MASK) 1362306a36Sopenharmony_ci return NULL; 1462306a36Sopenharmony_ci 1562306a36Sopenharmony_ci /* Don't allow RAM to be mapped. */ 1662306a36Sopenharmony_ci if (WARN_ON(pfn_is_map_memory(__phys_to_pfn(phys_addr)))) 1762306a36Sopenharmony_ci return NULL; 1862306a36Sopenharmony_ci 1962306a36Sopenharmony_ci return generic_ioremap_prot(phys_addr, size, __pgprot(prot)); 2062306a36Sopenharmony_ci} 2162306a36Sopenharmony_ciEXPORT_SYMBOL(ioremap_prot); 2262306a36Sopenharmony_ci 2362306a36Sopenharmony_ci/* 2462306a36Sopenharmony_ci * Must be called after early_fixmap_init 2562306a36Sopenharmony_ci */ 2662306a36Sopenharmony_civoid __init early_ioremap_init(void) 2762306a36Sopenharmony_ci{ 2862306a36Sopenharmony_ci early_ioremap_setup(); 2962306a36Sopenharmony_ci} 3062306a36Sopenharmony_ci 3162306a36Sopenharmony_cibool arch_memremap_can_ram_remap(resource_size_t offset, size_t size, 3262306a36Sopenharmony_ci unsigned long flags) 3362306a36Sopenharmony_ci{ 3462306a36Sopenharmony_ci unsigned long pfn = PHYS_PFN(offset); 3562306a36Sopenharmony_ci 3662306a36Sopenharmony_ci return pfn_is_map_memory(pfn); 3762306a36Sopenharmony_ci} 38