diff options
Diffstat (limited to 'arch/sparc/lib/PeeCeeI.c')
| -rw-r--r-- | arch/sparc/lib/PeeCeeI.c | 212 |
1 files changed, 212 insertions, 0 deletions
diff --git a/arch/sparc/lib/PeeCeeI.c b/arch/sparc/lib/PeeCeeI.c new file mode 100644 index 0000000000..cde4c9a51b --- /dev/null +++ b/arch/sparc/lib/PeeCeeI.c @@ -0,0 +1,212 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * PeeCeeI.c: The emerging standard... + * + * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu) + */ + +#include <linux/module.h> + +#include <asm/io.h> +#include <asm/byteorder.h> + +void outsb(unsigned long __addr, const void *src, unsigned long count) +{ + void __iomem *addr = (void __iomem *) __addr; + const u8 *p = src; + + while (count--) + __raw_writeb(*p++, addr); +} +EXPORT_SYMBOL(outsb); + +void outsw(unsigned long __addr, const void *src, unsigned long count) +{ + void __iomem *addr = (void __iomem *) __addr; + + while (count--) { + __raw_writew(*(u16 *)src, addr); + src += sizeof(u16); + } +} +EXPORT_SYMBOL(outsw); + +void outsl(unsigned long __addr, const void *src, unsigned long count) +{ + void __iomem *addr = (void __iomem *) __addr; + u32 l, l2; + + if (!count) + return; + + switch (((unsigned long)src) & 0x3) { + case 0x0: + /* src is naturally aligned */ + while (count--) { + __raw_writel(*(u32 *)src, addr); + src += sizeof(u32); + } + break; + case 0x2: + /* 2-byte alignment */ + while (count--) { + l = (*(u16 *)src) << 16; + l |= *(u16 *)(src + sizeof(u16)); + __raw_writel(l, addr); + src += sizeof(u32); + } + break; + case 0x1: + /* Hold three bytes in l each time, grab a byte from l2 */ + l = (*(u8 *)src) << 24; + l |= (*(u16 *)(src + sizeof(u8))) << 8; + src += sizeof(u8) + sizeof(u16); + while (count--) { + l2 = *(u32 *)src; + l |= (l2 >> 24); + __raw_writel(l, addr); + l = l2 << 8; + src += sizeof(u32); + } + break; + case 0x3: + /* Hold a byte in l each time, grab 3 bytes from l2 */ + l = (*(u8 *)src) << 24; + src += sizeof(u8); + while (count--) { + l2 = *(u32 *)src; + l |= (l2 >> 8); + __raw_writel(l, addr); + l = l2 << 24; + src += sizeof(u32); + } + break; + } +} +EXPORT_SYMBOL(outsl); + +void insb(unsigned long __addr, void *dst, unsigned long count) +{ + void __iomem *addr = (void __iomem *) __addr; + + if (count) { + u32 *pi; + u8 *pb = dst; + + while ((((unsigned long)pb) & 0x3) && count--) + *pb++ = __raw_readb(addr); + pi = (u32 *)pb; + while (count >= 4) { + u32 w; + + w = (__raw_readb(addr) << 24); + w |= (__raw_readb(addr) << 16); + w |= (__raw_readb(addr) << 8); + w |= (__raw_readb(addr) << 0); + *pi++ = w; + count -= 4; + } + pb = (u8 *)pi; + while (count--) + *pb++ = __raw_readb(addr); + } +} +EXPORT_SYMBOL(insb); + +void insw(unsigned long __addr, void *dst, unsigned long count) +{ + void __iomem *addr = (void __iomem *) __addr; + + if (count) { + u16 *ps = dst; + u32 *pi; + + if (((unsigned long)ps) & 0x2) { + *ps++ = __raw_readw(addr); + count--; + } + pi = (u32 *)ps; + while (count >= 2) { + u32 w; + + w = __raw_readw(addr) << 16; + w |= __raw_readw(addr) << 0; + *pi++ = w; + count -= 2; + } + ps = (u16 *)pi; + if (count) + *ps = __raw_readw(addr); + } +} +EXPORT_SYMBOL(insw); + +void insl(unsigned long __addr, void *dst, unsigned long count) +{ + void __iomem *addr = (void __iomem *) __addr; + + if (count) { + if ((((unsigned long)dst) & 0x3) == 0) { + u32 *pi = dst; + while (count--) + *pi++ = __raw_readl(addr); + } else { + u32 l = 0, l2, *pi; + u16 *ps; + u8 *pb; + + switch (((unsigned long)dst) & 3) { + case 0x2: + ps = dst; + count -= 1; + l = __raw_readl(addr); + *ps++ = l; + pi = (u32 *)ps; + while (count--) { + l2 = __raw_readl(addr); + *pi++ = (l << 16) | (l2 >> 16); + l = l2; + } + ps = (u16 *)pi; + *ps = l; + break; + + case 0x1: + pb = dst; + count -= 1; + l = __raw_readl(addr); + *pb++ = l >> 24; + ps = (u16 *)pb; + *ps++ = ((l >> 8) & 0xffff); + pi = (u32 *)ps; + while (count--) { + l2 = __raw_readl(addr); + *pi++ = (l << 24) | (l2 >> 8); + l = l2; + } + pb = (u8 *)pi; + *pb = l; + break; + + case 0x3: + pb = (u8 *)dst; + count -= 1; + l = __raw_readl(addr); + *pb++ = l >> 24; + pi = (u32 *)pb; + while (count--) { + l2 = __raw_readl(addr); + *pi++ = (l << 8) | (l2 >> 24); + l = l2; + } + ps = (u16 *)pi; + *ps++ = ((l >> 8) & 0xffff); + pb = (u8 *)ps; + *pb = l; + break; + } + } + } +} +EXPORT_SYMBOL(insl); + |