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/* SPDX-License-Identifier: GPL-2.0 */ #ifndef __SPARC_IO_H #define __SPARC_IO_H #include <linux/kernel.h> #include <linux/ioport.h> /* struct resource */ #define IO_SPACE_LIMIT 0xffffffff #define memset_io(d,c,sz) _memset_io(d,c,sz) #define memcpy_fromio(d,s,sz) _memcpy_fromio(d,s,sz) #define memcpy_toio(d,s,sz) _memcpy_toio(d,s,sz) #include <asm-generic/io.h> static inline void _memset_io(volatile void __iomem *dst, int c, __kernel_size_t n) { volatile void __iomem *d = dst; while (n--) { writeb(c, d); d++; } } static inline void _memcpy_fromio(void *dst, const volatile void __iomem *src, __kernel_size_t n) { char *d = dst; while (n--) { char tmp = readb(src); *d++ = tmp; src++; } } static inline void _memcpy_toio(volatile void __iomem *dst, const void *src, __kernel_size_t n) { const char *s = src; volatile void __iomem *d = dst; while (n--) { char tmp = *s++; writeb(tmp, d); d++; } } /* * SBus accessors. * * SBus has only one, memory mapped, I/O space. * We do not need to flip bytes for SBus of course. */ static inline u8 sbus_readb(const volatile void __iomem *addr) { return *(__force volatile u8 *)addr; } static inline u16 sbus_readw(const volatile void __iomem *addr) { return *(__force volatile u16 *)addr; } static inline u32 sbus_readl(const volatile void __iomem *addr) { return *(__force volatile u32 *)addr; } static inline void sbus_writeb(u8 b, volatile void __iomem *addr) { *(__force volatile u8 *)addr = b; } static inline void sbus_writew(u16 w, volatile void __iomem *addr) { *(__force volatile u16 *)addr = w; } static inline void sbus_writel(u32 l, volatile void __iomem *addr) { *(__force volatile u32 *)addr = l; } static inline void sbus_memset_io(volatile void __iomem *__dst, int c, __kernel_size_t n) { while(n--) { sbus_writeb(c, __dst); __dst++; } } static inline void sbus_memcpy_fromio(void *dst, const volatile void __iomem *src, __kernel_size_t n) { char *d = dst; while (n--) { char tmp = sbus_readb(src); *d++ = tmp; src++; } } static inline void sbus_memcpy_toio(volatile void __iomem *dst, const void *src, __kernel_size_t n) { const char *s = src; volatile void __iomem *d = dst; while (n--) { char tmp = *s++; sbus_writeb(tmp, d); d++; } } #ifdef __KERNEL__ /* * Bus number may be embedded in the higher bits of the physical address. * This is why we have no bus number argument to ioremap(). */ void iounmap(volatile void __iomem *addr); /* Create a virtual mapping cookie for an IO port range */ void __iomem *ioport_map(unsigned long port, unsigned int nr); void ioport_unmap(void __iomem *); /* Create a virtual mapping cookie for a PCI BAR (memory or IO) */ struct pci_dev; void pci_iounmap(struct pci_dev *dev, void __iomem *); static inline int sbus_can_dma_64bit(void) { return 0; /* actually, sparc_cpu_model==sun4d */ } static inline int sbus_can_burst64(void) { return 0; /* actually, sparc_cpu_model==sun4d */ } struct device; void sbus_set_sbus64(struct device *, int); #endif #define __ARCH_HAS_NO_PAGE_ZERO_MAPPED 1 #endif /* !(__SPARC_IO_H) */
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