mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-13 06:42:56 +00:00
83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
457 lines
14 KiB
C
457 lines
14 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* linux/include/asm-nds/io.h
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*
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* Copyright (C) 1996-2000 Russell King
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*
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* Copyright (C) 2011 Andes Technology Corporation
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* Shawn Lin, Andes Technology Corporation <nobuhiro@andestech.com>
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* Macpaul Lin, Andes Technology Corporation <macpaul@andestech.com>
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*
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* Modifications:
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* 16-Sep-1996 RMK Inlined the inx/outx functions & optimised for both
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* constant addresses and variable addresses.
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* 04-Dec-1997 RMK Moved a lot of this stuff to the new architecture
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* specific IO header files.
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* 27-Mar-1999 PJB Second parameter of memcpy_toio is const..
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* 04-Apr-1999 PJB Added check_signature.
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* 12-Dec-1999 RMK More cleanups
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* 18-Jun-2000 RMK Removed virt_to_* and friends definitions
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*/
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#ifndef __ASM_NDS_IO_H
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#define __ASM_NDS_IO_H
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/*
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* CAUTION:
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* - do not implement for NDS32 Arch yet.
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* - cmd_pci.c, cmd_scsi.c, Lynxkdi.c, usb.c, usb_storage.c, etc...
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* iinclude asm/io.h
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*/
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#ifdef __KERNEL__
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#include <linux/types.h>
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#include <asm/byteorder.h>
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static inline void sync(void)
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{
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}
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#ifdef CONFIG_ARCH_MAP_SYSMEM
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static inline void *map_sysmem(phys_addr_t paddr, unsigned long len)
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{
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if(paddr <PHYS_SDRAM_0_SIZE + PHYS_SDRAM_1_SIZE)
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paddr = paddr | 0x40000000;
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return (void *)(uintptr_t)paddr;
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}
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static inline void *unmap_sysmem(const void *vaddr)
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{
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phys_addr_t paddr = (phys_addr_t)vaddr;
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paddr = paddr & ~0x40000000;
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return (void *)(uintptr_t)paddr;
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}
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static inline phys_addr_t map_to_sysmem(const void *ptr)
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{
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return (phys_addr_t)(uintptr_t)ptr;
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}
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#endif
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/*
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* Generic virtual read/write. Note that we don't support half-word
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* read/writes. We define __arch_*[bl] here, and leave __arch_*w
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* to the architecture specific code.
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*/
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#define __arch_getb(a) (*(unsigned char *)(a))
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#define __arch_getw(a) (*(unsigned short *)(a))
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#define __arch_getl(a) (*(unsigned int *)(a))
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#define __arch_putb(v, a) (*(unsigned char *)(a) = (v))
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#define __arch_putw(v, a) (*(unsigned short *)(a) = (v))
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#define __arch_putl(v, a) (*(unsigned int *)(a) = (v))
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extern void __raw_writesb(unsigned int addr, const void *data, int bytelen);
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extern void __raw_writesw(unsigned int addr, const void *data, int wordlen);
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extern void __raw_writesl(unsigned int addr, const void *data, int longlen);
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extern void __raw_readsb(unsigned int addr, void *data, int bytelen);
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extern void __raw_readsw(unsigned int addr, void *data, int wordlen);
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extern void __raw_readsl(unsigned int addr, void *data, int longlen);
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#define __raw_writeb(v, a) __arch_putb(v, a)
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#define __raw_writew(v, a) __arch_putw(v, a)
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#define __raw_writel(v, a) __arch_putl(v, a)
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#define __raw_readb(a) __arch_getb(a)
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#define __raw_readw(a) __arch_getw(a)
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#define __raw_readl(a) __arch_getl(a)
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/*
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* TODO: The kernel offers some more advanced versions of barriers, it might
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* have some advantages to use them instead of the simple one here.
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*/
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#define dmb() __asm__ __volatile__ ("" : : : "memory")
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#define __iormb() dmb()
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#define __iowmb() dmb()
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static inline void writeb(u8 val, volatile void __iomem *addr)
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{
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__iowmb();
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__arch_putb(val, addr);
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}
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static inline void writew(u16 val, volatile void __iomem *addr)
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{
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__iowmb();
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__arch_putw(val, addr);
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}
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static inline void writel(u32 val, volatile void __iomem *addr)
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{
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__iowmb();
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__arch_putl(val, addr);
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}
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static inline u8 readb(const volatile void __iomem *addr)
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{
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u8 val;
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val = __arch_getb(addr);
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__iormb();
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return val;
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}
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static inline u16 readw(const volatile void __iomem *addr)
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{
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u16 val;
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val = __arch_getw(addr);
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__iormb();
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return val;
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}
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static inline u32 readl(const volatile void __iomem *addr)
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{
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u32 val;
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val = __arch_getl(addr);
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__iormb();
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return val;
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}
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/*
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* The compiler seems to be incapable of optimising constants
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* properly. Spell it out to the compiler in some cases.
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* These are only valid for small values of "off" (< 1<<12)
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*/
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#define __raw_base_writeb(val, base, off) __arch_base_putb(val, base, off)
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#define __raw_base_writew(val, base, off) __arch_base_putw(val, base, off)
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#define __raw_base_writel(val, base, off) __arch_base_putl(val, base, off)
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#define __raw_base_readb(base, off) __arch_base_getb(base, off)
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#define __raw_base_readw(base, off) __arch_base_getw(base, off)
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#define __raw_base_readl(base, off) __arch_base_getl(base, off)
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#define out_arch(type, endian, a, v) __raw_write##type(cpu_to_##endian(v), a)
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#define in_arch(type, endian, a) endian##_to_cpu(__raw_read##type(a))
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#define out_le32(a, v) out_arch(l, le32, a, v)
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#define out_le16(a, v) out_arch(w, le16, a, v)
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#define in_le32(a) in_arch(l, le32, a)
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#define in_le16(a) in_arch(w, le16, a)
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#define out_be32(a, v) out_arch(l, be32, a, v)
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#define out_be16(a, v) out_arch(w, be16, a, v)
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#define in_be32(a) in_arch(l, be32, a)
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#define in_be16(a) in_arch(w, be16, a)
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#define out_8(a, v) __raw_writeb(v, a)
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#define in_8(a) __raw_readb(a)
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/*
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* Clear and set bits in one shot. These macros can be used to clear and
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* set multiple bits in a register using a single call. These macros can
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* also be used to set a multiple-bit bit pattern using a mask, by
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* specifying the mask in the 'clear' parameter and the new bit pattern
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* in the 'set' parameter.
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*/
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#define clrbits(type, addr, clear) \
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out_##type((addr), in_##type(addr) & ~(clear))
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#define setbits(type, addr, set) \
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out_##type((addr), in_##type(addr) | (set))
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#define clrsetbits(type, addr, clear, set) \
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out_##type((addr), (in_##type(addr) & ~(clear)) | (set))
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#define clrbits_be32(addr, clear) clrbits(be32, addr, clear)
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#define setbits_be32(addr, set) setbits(be32, addr, set)
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#define clrsetbits_be32(addr, clear, set) clrsetbits(be32, addr, clear, set)
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#define clrbits_le32(addr, clear) clrbits(le32, addr, clear)
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#define setbits_le32(addr, set) setbits(le32, addr, set)
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#define clrsetbits_le32(addr, clear, set) clrsetbits(le32, addr, clear, set)
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#define clrbits_be16(addr, clear) clrbits(be16, addr, clear)
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#define setbits_be16(addr, set) setbits(be16, addr, set)
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#define clrsetbits_be16(addr, clear, set) clrsetbits(be16, addr, clear, set)
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#define clrbits_le16(addr, clear) clrbits(le16, addr, clear)
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#define setbits_le16(addr, set) setbits(le16, addr, set)
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#define clrsetbits_le16(addr, clear, set) clrsetbits(le16, addr, clear, set)
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#define clrbits_8(addr, clear) clrbits(8, addr, clear)
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#define setbits_8(addr, set) setbits(8, addr, set)
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#define clrsetbits_8(addr, clear, set) clrsetbits(8, addr, clear, set)
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/*
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* Now, pick up the machine-defined IO definitions
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* #include <asm/arch/io.h>
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*/
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/*
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* IO port access primitives
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* -------------------------
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*
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* The NDS32 doesn't have special IO access instructions just like ARM;
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* all IO is memory mapped.
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* Note that these are defined to perform little endian accesses
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* only. Their primary purpose is to access PCI and ISA peripherals.
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*
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* Note that for a big endian machine, this implies that the following
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* big endian mode connectivity is in place, as described by numerious
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* ARM documents:
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*
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* PCI: D0-D7 D8-D15 D16-D23 D24-D31
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* ARM: D24-D31 D16-D23 D8-D15 D0-D7
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*
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* The machine specific io.h include defines __io to translate an "IO"
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* address to a memory address.
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*
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* Note that we prevent GCC re-ordering or caching values in expressions
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* by introducing sequence points into the in*() definitions. Note that
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* __raw_* do not guarantee this behaviour.
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*
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* The {in,out}[bwl] macros are for emulating x86-style PCI/ISA IO space.
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*/
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#ifdef __io
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#define outb(v, p) __raw_writeb(v, __io(p))
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#define outw(v, p) __raw_writew(cpu_to_le16(v), __io(p))
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#define outl(v, p) __raw_writel(cpu_to_le32(v), __io(p))
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#define inb(p) ({ unsigned int __v = __raw_readb(__io(p)); __v; })
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#define inw(p) ({ unsigned int __v = le16_to_cpu(__raw_readw(__io(p))); __v; })
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#define inl(p) ({ unsigned int __v = le32_to_cpu(__raw_readl(__io(p))); __v; })
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#define outsb(p, d, l) writesb(__io(p), d, l)
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#define outsw(p, d, l) writesw(__io(p), d, l)
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#define outsl(p, d, l) writesl(__io(p), d, l)
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#define insb(p, d, l) readsb(__io(p), d, l)
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#define insw(p, d, l) readsw(__io(p), d, l)
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#define insl(p, d, l) readsl(__io(p), d, l)
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static inline void readsb(unsigned int *addr, void * data, int bytelen)
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{
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unsigned char *ptr = (unsigned char *)addr;
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unsigned char *ptr2 = (unsigned char *)data;
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while (bytelen) {
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*ptr2 = *ptr;
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ptr2++;
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bytelen--;
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}
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}
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static inline void readsw(unsigned int *addr, void * data, int wordlen)
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{
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unsigned short *ptr = (unsigned short *)addr;
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unsigned short *ptr2 = (unsigned short *)data;
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while (wordlen) {
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*ptr2 = *ptr;
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ptr2++;
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wordlen--;
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}
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}
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static inline void readsl(unsigned int *addr, void * data, int longlen)
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{
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unsigned int *ptr = (unsigned int *)addr;
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unsigned int *ptr2 = (unsigned int *)data;
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while (longlen) {
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*ptr2 = *ptr;
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ptr2++;
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longlen--;
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}
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}
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static inline void writesb(unsigned int *addr, const void * data, int bytelen)
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{
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unsigned char *ptr = (unsigned char *)addr;
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unsigned char *ptr2 = (unsigned char *)data;
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while (bytelen) {
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*ptr = *ptr2;
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ptr2++;
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bytelen--;
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}
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}
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static inline void writesw(unsigned int *addr, const void * data, int wordlen)
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{
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unsigned short *ptr = (unsigned short *)addr;
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unsigned short *ptr2 = (unsigned short *)data;
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while (wordlen) {
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*ptr = *ptr2;
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ptr2++;
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wordlen--;
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}
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}
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static inline void writesl(unsigned int *addr, const void * data, int longlen)
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{
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unsigned int *ptr = (unsigned int *)addr;
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unsigned int *ptr2 = (unsigned int *)data;
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while (longlen) {
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*ptr = *ptr2;
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ptr2++;
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longlen--;
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}
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}
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#endif
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#define outb_p(val, port) outb((val), (port))
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#define outw_p(val, port) outw((val), (port))
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#define outl_p(val, port) outl((val), (port))
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#define inb_p(port) inb((port))
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#define inw_p(port) inw((port))
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#define inl_p(port) inl((port))
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#define outsb_p(port, from, len) outsb(port, from, len)
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#define outsw_p(port, from, len) outsw(port, from, len)
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#define outsl_p(port, from, len) outsl(port, from, len)
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#define insb_p(port, to, len) insb(port, to, len)
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#define insw_p(port, to, len) insw(port, to, len)
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#define insl_p(port, to, len) insl(port, to, len)
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/*
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* DMA-consistent mapping functions. These allocate/free a region of
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* uncached, unwrite-buffered mapped memory space for use with DMA
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* devices. This is the "generic" version. The PCI specific version
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* is in pci.h
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*/
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extern void *consistent_alloc(int gfp, size_t size, dma_addr_t *handle);
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extern void consistent_free(void *vaddr, size_t size, dma_addr_t handle);
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extern void consistent_sync(void *vaddr, size_t size, int rw);
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/*
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* String version of IO memory access ops:
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*/
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extern void _memcpy_fromio(void *, unsigned long, size_t);
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extern void _memcpy_toio(unsigned long, const void *, size_t);
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extern void _memset_io(unsigned long, int, size_t);
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extern void __readwrite_bug(const char *fn);
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/*
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* If this architecture has PCI memory IO, then define the read/write
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* macros. These should only be used with the cookie passed from
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* ioremap.
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*/
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#ifdef __mem_pci
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#define readb(c) ({ unsigned int __v = \
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__raw_readb(__mem_pci(c)); __v; })
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#define readw(c) ({ unsigned int __v = \
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le16_to_cpu(__raw_readw(__mem_pci(c))); __v; })
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#define readl(c) ({ unsigned int __v = \
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le32_to_cpu(__raw_readl(__mem_pci(c))); __v; })
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#define writeb(v, c) __raw_writeb(v, __mem_pci(c))
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#define writew(v, c) __raw_writew(cpu_to_le16(v), __mem_pci(c))
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#define writel(v, c) __raw_writel(cpu_to_le32(v), __mem_pci(c))
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#define memset_io(c, v, l) _memset_io(__mem_pci(c), (v), (l))
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#define memcpy_fromio(a, c, l) _memcpy_fromio((a), __mem_pci(c), (l))
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#define memcpy_toio(c, a, l) _memcpy_toio(__mem_pci(c), (a), (l))
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#define eth_io_copy_and_sum(s, c, l, b) \
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eth_copy_and_sum((s), __mem_pci(c), (l), (b))
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static inline int
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check_signature(unsigned long io_addr, const unsigned char *signature,
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int length)
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{
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int retval = 0;
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do {
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if (readb(io_addr) != *signature)
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goto out;
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io_addr++;
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signature++;
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length--;
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} while (length);
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retval = 1;
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out:
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return retval;
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}
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#endif /* __mem_pci */
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/*
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* If this architecture has ISA IO, then define the isa_read/isa_write
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* macros.
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*/
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#ifdef __mem_isa
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#define isa_readb(addr) __raw_readb(__mem_isa(addr))
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#define isa_readw(addr) __raw_readw(__mem_isa(addr))
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#define isa_readl(addr) __raw_readl(__mem_isa(addr))
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#define isa_writeb(val, addr) __raw_writeb(val, __mem_isa(addr))
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#define isa_writew(val, addr) __raw_writew(val, __mem_isa(addr))
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#define isa_writel(val, addr) __raw_writel(val, __mem_isa(addr))
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#define isa_memset_io(a, b, c) _memset_io(__mem_isa(a), (b), (c))
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#define isa_memcpy_fromio(a, b, c) _memcpy_fromio((a), __mem_isa(b), (c))
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#define isa_memcpy_toio(a, b, c) _memcpy_toio(__mem_isa((a)), (b), (c))
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#define isa_eth_io_copy_and_sum(a, b, c, d) \
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eth_copy_and_sum((a), __mem_isa(b), (c), (d))
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static inline int
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isa_check_signature(unsigned long io_addr, const unsigned char *signature,
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int length)
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{
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int retval = 0;
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do {
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if (isa_readb(io_addr) != *signature)
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goto out;
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io_addr++;
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signature++;
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length--;
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} while (length);
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retval = 1;
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out:
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return retval;
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}
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#else /* __mem_isa */
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#define isa_readb(addr) (__readwrite_bug("isa_readb"), 0)
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#define isa_readw(addr) (__readwrite_bug("isa_readw"), 0)
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#define isa_readl(addr) (__readwrite_bug("isa_readl"), 0)
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#define isa_writeb(val, addr) __readwrite_bug("isa_writeb")
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#define isa_writew(val, addr) __readwrite_bug("isa_writew")
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#define isa_writel(val, addr) __readwrite_bug("isa_writel")
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#define isa_memset_io(a, b, c) __readwrite_bug("isa_memset_io")
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#define isa_memcpy_fromio(a, b, c) __readwrite_bug("isa_memcpy_fromio")
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#define isa_memcpy_toio(a, b, c) __readwrite_bug("isa_memcpy_toio")
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#define isa_eth_io_copy_and_sum(a, b, c, d) \
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__readwrite_bug("isa_eth_io_copy_and_sum")
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#define isa_check_signature(io, sig, len) (0)
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#endif /* __mem_isa */
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#include <asm-generic/io.h>
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#endif /* __KERNEL__ */
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#endif /* __ASM_NDS_IO_H */
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