xref: /openbmc/linux/arch/sh/lib/io.c (revision 64c9627c2628bc3bd3291710b8ee6f8335883f8b)
162d6b66eSPaul Mundt /*
262d6b66eSPaul Mundt  * arch/sh/lib/io.c - SH32 optimized I/O routines
362d6b66eSPaul Mundt  *
462d6b66eSPaul Mundt  * Copyright (C) 2000  Stuart Menefy
562d6b66eSPaul Mundt  * Copyright (C) 2005  Paul Mundt
662d6b66eSPaul Mundt  *
762d6b66eSPaul Mundt  * Provide real functions which expand to whatever the header file defined.
862d6b66eSPaul Mundt  * Also definitions of machine independent IO functions.
962d6b66eSPaul Mundt  *
1062d6b66eSPaul Mundt  * This file is subject to the terms and conditions of the GNU General Public
1162d6b66eSPaul Mundt  * License.  See the file "COPYING" in the main directory of this archive
1262d6b66eSPaul Mundt  * for more details.
1362d6b66eSPaul Mundt  */
1462d6b66eSPaul Mundt #include <linux/module.h>
1562d6b66eSPaul Mundt #include <linux/io.h>
1662d6b66eSPaul Mundt 
17*64c9627cSPaul Mundt void __raw_readsl(const void __iomem *addr, void *datap, int len)
1862d6b66eSPaul Mundt {
1962d6b66eSPaul Mundt 	u32 *data;
2062d6b66eSPaul Mundt 
2162d6b66eSPaul Mundt 	for (data = datap; (len != 0) && (((u32)data & 0x1f) != 0); len--)
22*64c9627cSPaul Mundt 		*data++ = __raw_readl(addr);
2362d6b66eSPaul Mundt 
2462d6b66eSPaul Mundt 	if (likely(len >= (0x20 >> 2))) {
2562d6b66eSPaul Mundt 		int tmp2, tmp3, tmp4, tmp5, tmp6;
2662d6b66eSPaul Mundt 
2762d6b66eSPaul Mundt 		__asm__ __volatile__(
2862d6b66eSPaul Mundt 			"1:			\n\t"
2962d6b66eSPaul Mundt 			"mov.l	@%7, r0		\n\t"
3062d6b66eSPaul Mundt 			"mov.l	@%7, %2		\n\t"
3162d6b66eSPaul Mundt #ifdef CONFIG_CPU_SH4
3262d6b66eSPaul Mundt 			"movca.l r0, @%0	\n\t"
3362d6b66eSPaul Mundt #else
3462d6b66eSPaul Mundt 			"mov.l	r0, @%0		\n\t"
3562d6b66eSPaul Mundt #endif
3662d6b66eSPaul Mundt 			"mov.l	@%7, %3		\n\t"
3762d6b66eSPaul Mundt 			"mov.l	@%7, %4		\n\t"
3862d6b66eSPaul Mundt 			"mov.l	@%7, %5		\n\t"
3962d6b66eSPaul Mundt 			"mov.l	@%7, %6		\n\t"
4062d6b66eSPaul Mundt 			"mov.l	@%7, r7		\n\t"
4162d6b66eSPaul Mundt 			"mov.l	@%7, r0		\n\t"
4262d6b66eSPaul Mundt 			"mov.l	%2, @(0x04,%0)	\n\t"
4362d6b66eSPaul Mundt 			"mov	#0x20>>2, %2	\n\t"
4462d6b66eSPaul Mundt 			"mov.l	%3, @(0x08,%0)	\n\t"
4562d6b66eSPaul Mundt 			"sub	%2, %1		\n\t"
4662d6b66eSPaul Mundt 			"mov.l	%4, @(0x0c,%0)	\n\t"
4762d6b66eSPaul Mundt 			"cmp/hi	%1, %2		! T if 32 > len	\n\t"
4862d6b66eSPaul Mundt 			"mov.l	%5, @(0x10,%0)	\n\t"
4962d6b66eSPaul Mundt 			"mov.l	%6, @(0x14,%0)	\n\t"
5062d6b66eSPaul Mundt 			"mov.l	r7, @(0x18,%0)	\n\t"
5162d6b66eSPaul Mundt 			"mov.l	r0, @(0x1c,%0)	\n\t"
5262d6b66eSPaul Mundt 			"bf.s	1b		\n\t"
5362d6b66eSPaul Mundt 			" add	#0x20, %0	\n\t"
5462d6b66eSPaul Mundt 			: "=&r" (data), "=&r" (len),
5562d6b66eSPaul Mundt 			  "=&r" (tmp2), "=&r" (tmp3), "=&r" (tmp4),
5662d6b66eSPaul Mundt 			  "=&r" (tmp5), "=&r" (tmp6)
5762d6b66eSPaul Mundt 			: "r"(addr), "0" (data), "1" (len)
5862d6b66eSPaul Mundt 			: "r0", "r7", "t", "memory");
5962d6b66eSPaul Mundt 	}
6062d6b66eSPaul Mundt 
6162d6b66eSPaul Mundt 	for (; len != 0; len--)
62*64c9627cSPaul Mundt 		*data++ = __raw_readl(addr);
6362d6b66eSPaul Mundt }
6462d6b66eSPaul Mundt EXPORT_SYMBOL(__raw_readsl);
6562d6b66eSPaul Mundt 
66*64c9627cSPaul Mundt void __raw_writesl(void __iomem *addr, const void *data, int len)
6762d6b66eSPaul Mundt {
6862d6b66eSPaul Mundt 	if (likely(len != 0)) {
6962d6b66eSPaul Mundt 		int tmp1;
7062d6b66eSPaul Mundt 
7162d6b66eSPaul Mundt 		__asm__ __volatile__ (
7262d6b66eSPaul Mundt 			"1:				\n\t"
7362d6b66eSPaul Mundt 			"mov.l	@%0+, %1	\n\t"
7462d6b66eSPaul Mundt 			"dt		%3		\n\t"
7562d6b66eSPaul Mundt 			"bf.s		1b		\n\t"
7662d6b66eSPaul Mundt 			" mov.l	%1, @%4		\n\t"
7762d6b66eSPaul Mundt 			: "=&r" (data), "=&r" (tmp1)
7862d6b66eSPaul Mundt 			: "0" (data), "r" (len), "r"(addr)
7962d6b66eSPaul Mundt 			: "t", "memory");
8062d6b66eSPaul Mundt 	}
8162d6b66eSPaul Mundt }
8262d6b66eSPaul Mundt EXPORT_SYMBOL(__raw_writesl);
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