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/*
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* (C) Copyright 2011, Julius Baxter <julius@opencores.org>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#ifndef __ASM_OPENRISC_IO_H
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#define __ASM_OPENRISC_IO_H
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/*
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* Given a physical address and a length, return a virtual address
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* that can be used to access the memory range with the caching
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* properties specified by "flags".
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*/
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#define MAP_NOCACHE (0)
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#define MAP_WRCOMBINE (0)
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#define MAP_WRBACK (0)
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#define MAP_WRTHROUGH (0)
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static inline void *
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map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags)
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{
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return (void *)paddr;
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}
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/*
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* Take down a mapping set up by map_physmem().
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*/
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static inline void unmap_physmem(void *vaddr, unsigned long flags)
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{
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}
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/*
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* Change virtual addresses to physical addresses
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*/
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static inline phys_addr_t virt_to_phys(void *vaddr)
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{
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return (phys_addr_t)(vaddr);
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}
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/*
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* readX/writeX() are used to access memory mapped devices. On some
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* architectures the memory mapped IO stuff needs to be accessed
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* differently. On the openrisc architecture, we just read/write the
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* memory location directly.
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*/
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#define readb(addr) (*(volatile unsigned char *) (addr))
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#define readw(addr) (*(volatile unsigned short *) (addr))
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#define readl(addr) (*(volatile unsigned int *) (addr))
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#define __raw_readb readb
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#define __raw_readw readw
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#define __raw_readl readl
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#define writeb(b, addr) ((*(volatile unsigned char *) (addr)) = (b))
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#define writew(b, addr) ((*(volatile unsigned short *) (addr)) = (b))
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#define writel(b, addr) ((*(volatile unsigned int *) (addr)) = (b))
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#define __raw_writeb writeb
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#define __raw_writew writew
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#define __raw_writel writel
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#define memset_io(a, b, c) memset((void *)(a), (b), (c))
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#define memcpy_fromio(a, b, c) memcpy((a), (void *)(b), (c))
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#define memcpy_toio(a, b, c) memcpy((void *)(a), (b), (c))
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/*
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* Again, OpenRISC does not require mem IO specific function.
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*/
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#define IO_BASE 0x0
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#define IO_SPACE_LIMIT 0xffffffff
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#define inb(port) readb((port + IO_BASE))
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#define outb(value, port) writeb((value), (port + IO_BASE))
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#define inb_p(port) inb((port))
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#define outb_p(value, port) outb((value), (port))
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/*
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* Convert a physical pointer to a virtual kernel pointer for /dev/mem
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* access
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*/
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#define xlate_dev_mem_ptr(p) __va(p)
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/*
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* Convert a virtual cached pointer to an uncached pointer
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*/
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#define xlate_dev_kmem_ptr(p) p
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#define ioread8(addr) readb(addr)
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#define ioread16(addr) readw(addr)
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#define ioread32(addr) readl(addr)
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#define iowrite8(v, addr) writeb((v), (addr))
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#define iowrite16(v, addr) writew((v), (addr))
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#define iowrite32(v, addr) writel((v), (addr))
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#endif
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