diff options
Diffstat (limited to 'arch/xtensa/mm/ioremap.c')
-rw-r--r-- | arch/xtensa/mm/ioremap.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/arch/xtensa/mm/ioremap.c b/arch/xtensa/mm/ioremap.c new file mode 100644 index 0000000000..8ca660b7ab --- /dev/null +++ b/arch/xtensa/mm/ioremap.c @@ -0,0 +1,35 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * ioremap implementation. + * + * Copyright (C) 2015 Cadence Design Systems Inc. + */ + +#include <linux/io.h> +#include <linux/pgtable.h> +#include <asm/cacheflush.h> +#include <asm/io.h> + +void __iomem *ioremap_prot(phys_addr_t phys_addr, size_t size, + unsigned long prot) +{ + unsigned long pfn = __phys_to_pfn((phys_addr)); + WARN_ON(pfn_valid(pfn)); + + return generic_ioremap_prot(phys_addr, size, __pgprot(prot)); +} +EXPORT_SYMBOL(ioremap_prot); + +void iounmap(volatile void __iomem *addr) +{ + unsigned long va = (unsigned long) addr; + + if ((va >= XCHAL_KIO_CACHED_VADDR && + va - XCHAL_KIO_CACHED_VADDR < XCHAL_KIO_SIZE) || + (va >= XCHAL_KIO_BYPASS_VADDR && + va - XCHAL_KIO_BYPASS_VADDR < XCHAL_KIO_SIZE)) + return; + + generic_iounmap(addr); +} +EXPORT_SYMBOL(iounmap); |