2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
6 * Copyright (C) 2000-2004 Silicon Graphics, Inc. All rights reserved.
11 #include <linux/compiler.h>
12 #include <asm/intrinsics.h>
14 extern void * sn_io_addr(unsigned long port) __attribute_const__; /* Forward definition */
15 extern void __sn_mmiowb(void); /* Forward definition */
17 extern int num_cnodes;
19 #define __sn_mf_a() ia64_mfa()
21 extern void sn_dma_flush(unsigned long);
23 #define __sn_inb ___sn_inb
24 #define __sn_inw ___sn_inw
25 #define __sn_inl ___sn_inl
26 #define __sn_outb ___sn_outb
27 #define __sn_outw ___sn_outw
28 #define __sn_outl ___sn_outl
29 #define __sn_readb ___sn_readb
30 #define __sn_readw ___sn_readw
31 #define __sn_readl ___sn_readl
32 #define __sn_readq ___sn_readq
33 #define __sn_readb_relaxed ___sn_readb_relaxed
34 #define __sn_readw_relaxed ___sn_readw_relaxed
35 #define __sn_readl_relaxed ___sn_readl_relaxed
36 #define __sn_readq_relaxed ___sn_readq_relaxed
39 * Convenience macros for setting/clearing bits using the above accessors
42 #define __sn_setq_relaxed(addr, val) \
43 writeq((__sn_readq_relaxed(addr) | (val)), (addr))
44 #define __sn_clrq_relaxed(addr, val) \
45 writeq((__sn_readq_relaxed(addr) & ~(val)), (addr))
48 * The following routines are SN Platform specific, called when
49 * a reference is made to inX/outX set macros. SN Platform
50 * inX set of macros ensures that Posted DMA writes on the
53 * The routines should be self explainatory.
56 static inline unsigned int
57 ___sn_inb (unsigned long port)
59 volatile unsigned char *addr;
60 unsigned char ret = -1;
62 if ((addr = sn_io_addr(port))) {
65 sn_dma_flush((unsigned long)addr);
70 static inline unsigned int
71 ___sn_inw (unsigned long port)
73 volatile unsigned short *addr;
74 unsigned short ret = -1;
76 if ((addr = sn_io_addr(port))) {
79 sn_dma_flush((unsigned long)addr);
84 static inline unsigned int
85 ___sn_inl (unsigned long port)
87 volatile unsigned int *addr;
88 unsigned int ret = -1;
90 if ((addr = sn_io_addr(port))) {
93 sn_dma_flush((unsigned long)addr);
99 ___sn_outb (unsigned char val, unsigned long port)
101 volatile unsigned char *addr;
103 if ((addr = sn_io_addr(port))) {
110 ___sn_outw (unsigned short val, unsigned long port)
112 volatile unsigned short *addr;
114 if ((addr = sn_io_addr(port))) {
121 ___sn_outl (unsigned int val, unsigned long port)
123 volatile unsigned int *addr;
125 if ((addr = sn_io_addr(port))) {
132 * The following routines are SN Platform specific, called when
133 * a reference is made to readX/writeX set macros. SN Platform
134 * readX set of macros ensures that Posted DMA writes on the
137 * The routines should be self explainatory.
140 static inline unsigned char
141 ___sn_readb (const volatile void __iomem *addr)
145 val = *(volatile unsigned char __force *)addr;
147 sn_dma_flush((unsigned long)addr);
151 static inline unsigned short
152 ___sn_readw (const volatile void __iomem *addr)
156 val = *(volatile unsigned short __force *)addr;
158 sn_dma_flush((unsigned long)addr);
162 static inline unsigned int
163 ___sn_readl (const volatile void __iomem *addr)
167 val = *(volatile unsigned int __force *)addr;
169 sn_dma_flush((unsigned long)addr);
173 static inline unsigned long
174 ___sn_readq (const volatile void __iomem *addr)
178 val = *(volatile unsigned long __force *)addr;
180 sn_dma_flush((unsigned long)addr);
185 * For generic and SN2 kernels, we have a set of fast access
186 * PIO macros. These macros are provided on SN Platform
187 * because the normal inX and readX macros perform an
188 * additional task of flushing Post DMA request on the Bridge.
190 * These routines should be self explainatory.
193 static inline unsigned int
194 sn_inb_fast (unsigned long port)
196 volatile unsigned char *addr = (unsigned char *)port;
204 static inline unsigned int
205 sn_inw_fast (unsigned long port)
207 volatile unsigned short *addr = (unsigned short *)port;
215 static inline unsigned int
216 sn_inl_fast (unsigned long port)
218 volatile unsigned int *addr = (unsigned int *)port;
226 static inline unsigned char
227 ___sn_readb_relaxed (const volatile void __iomem *addr)
229 return *(volatile unsigned char __force *)addr;
232 static inline unsigned short
233 ___sn_readw_relaxed (const volatile void __iomem *addr)
235 return *(volatile unsigned short __force *)addr;
238 static inline unsigned int
239 ___sn_readl_relaxed (const volatile void __iomem *addr)
241 return *(volatile unsigned int __force *) addr;
244 static inline unsigned long
245 ___sn_readq_relaxed (const volatile void __iomem *addr)
247 return *(volatile unsigned long __force *) addr;
253 sn_pci_set_vchan(struct pci_dev *pci_dev, unsigned long *addr, int vchan)
260 if (!(*addr >> 32)) /* Using a mask here would be cleaner */
261 return 0; /* but this generates better code */
265 *addr |= (1UL << 57);
268 *addr &= ~(1UL << 57);
274 #endif /* _ASM_SN_IO_H */