1 // SPDX-License-Identifier: GPL-2.0-or-later 2 3 #include <linux/io.h> 4 #include <linux/slab.h> 5 #include <linux/mmzone.h> 6 #include <linux/vmalloc.h> 7 #include <asm/io-workarounds.h> 8 9 unsigned long ioremap_bot; 10 EXPORT_SYMBOL(ioremap_bot); 11 12 void __iomem *ioremap(phys_addr_t addr, unsigned long size) 13 { 14 pgprot_t prot = pgprot_noncached(PAGE_KERNEL); 15 void *caller = __builtin_return_address(0); 16 17 if (iowa_is_active()) 18 return iowa_ioremap(addr, size, prot, caller); 19 return __ioremap_caller(addr, size, prot, caller); 20 } 21 EXPORT_SYMBOL(ioremap); 22 23 void __iomem *ioremap_wc(phys_addr_t addr, unsigned long size) 24 { 25 pgprot_t prot = pgprot_noncached_wc(PAGE_KERNEL); 26 void *caller = __builtin_return_address(0); 27 28 if (iowa_is_active()) 29 return iowa_ioremap(addr, size, prot, caller); 30 return __ioremap_caller(addr, size, prot, caller); 31 } 32 EXPORT_SYMBOL(ioremap_wc); 33 34 void __iomem *ioremap_coherent(phys_addr_t addr, unsigned long size) 35 { 36 pgprot_t prot = pgprot_cached(PAGE_KERNEL); 37 void *caller = __builtin_return_address(0); 38 39 if (iowa_is_active()) 40 return iowa_ioremap(addr, size, prot, caller); 41 return __ioremap_caller(addr, size, prot, caller); 42 } 43 44 void __iomem *ioremap_prot(phys_addr_t addr, size_t size, unsigned long flags) 45 { 46 pte_t pte = __pte(flags); 47 void *caller = __builtin_return_address(0); 48 49 /* writeable implies dirty for kernel addresses */ 50 if (pte_write(pte)) 51 pte = pte_mkdirty(pte); 52 53 if (iowa_is_active()) 54 return iowa_ioremap(addr, size, pte_pgprot(pte), caller); 55 return __ioremap_caller(addr, size, pte_pgprot(pte), caller); 56 } 57 EXPORT_SYMBOL(ioremap_prot); 58 59 int early_ioremap_range(unsigned long ea, phys_addr_t pa, 60 unsigned long size, pgprot_t prot) 61 { 62 unsigned long i; 63 64 for (i = 0; i < size; i += PAGE_SIZE) { 65 int err = map_kernel_page(ea + i, pa + i, pgprot_nx(prot)); 66 67 if (WARN_ON_ONCE(err)) /* Should clean up */ 68 return err; 69 } 70 71 return 0; 72 } 73