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- /*
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 2000-2004 Silicon Graphics, Inc. All rights reserved.
- */
-
- #ifndef _ASM_SN_IO_H
- #define _ASM_SN_IO_H
- #include <linux/compiler.h>
- #include <asm/intrinsics.h>
-
- extern void * sn_io_addr(unsigned long port) __attribute_const__; /* Forward definition */
- extern void __sn_mmiowb(void); /* Forward definition */
-
- extern int num_cnodes;
-
- #define __sn_mf_a() ia64_mfa()
-
- extern void sn_dma_flush(unsigned long);
-
- #define __sn_inb ___sn_inb
- #define __sn_inw ___sn_inw
- #define __sn_inl ___sn_inl
- #define __sn_outb ___sn_outb
- #define __sn_outw ___sn_outw
- #define __sn_outl ___sn_outl
- #define __sn_readb ___sn_readb
- #define __sn_readw ___sn_readw
- #define __sn_readl ___sn_readl
- #define __sn_readq ___sn_readq
- #define __sn_readb_relaxed ___sn_readb_relaxed
- #define __sn_readw_relaxed ___sn_readw_relaxed
- #define __sn_readl_relaxed ___sn_readl_relaxed
- #define __sn_readq_relaxed ___sn_readq_relaxed
-
- /*
- * Convenience macros for setting/clearing bits using the above accessors
- */
-
- #define __sn_setq_relaxed(addr, val) \
- writeq((__sn_readq_relaxed(addr) | (val)), (addr))
- #define __sn_clrq_relaxed(addr, val) \
- writeq((__sn_readq_relaxed(addr) & ~(val)), (addr))
-
- /*
- * The following routines are SN Platform specific, called when
- * a reference is made to inX/outX set macros. SN Platform
- * inX set of macros ensures that Posted DMA writes on the
- * Bridge is flushed.
- *
- * The routines should be self explainatory.
- */
-
- static inline unsigned int
- ___sn_inb (unsigned long port)
- {
- volatile unsigned char *addr;
- unsigned char ret = -1;
-
- if ((addr = sn_io_addr(port))) {
- ret = *addr;
- __sn_mf_a();
- sn_dma_flush((unsigned long)addr);
- }
- return ret;
- }
-
- static inline unsigned int
- ___sn_inw (unsigned long port)
- {
- volatile unsigned short *addr;
- unsigned short ret = -1;
-
- if ((addr = sn_io_addr(port))) {
- ret = *addr;
- __sn_mf_a();
- sn_dma_flush((unsigned long)addr);
- }
- return ret;
- }
-
- static inline unsigned int
- ___sn_inl (unsigned long port)
- {
- volatile unsigned int *addr;
- unsigned int ret = -1;
-
- if ((addr = sn_io_addr(port))) {
- ret = *addr;
- __sn_mf_a();
- sn_dma_flush((unsigned long)addr);
- }
- return ret;
- }
-
- static inline void
- ___sn_outb (unsigned char val, unsigned long port)
- {
- volatile unsigned char *addr;
-
- if ((addr = sn_io_addr(port))) {
- *addr = val;
- __sn_mmiowb();
- }
- }
-
- static inline void
- ___sn_outw (unsigned short val, unsigned long port)
- {
- volatile unsigned short *addr;
-
- if ((addr = sn_io_addr(port))) {
- *addr = val;
- __sn_mmiowb();
- }
- }
-
- static inline void
- ___sn_outl (unsigned int val, unsigned long port)
- {
- volatile unsigned int *addr;
-
- if ((addr = sn_io_addr(port))) {
- *addr = val;
- __sn_mmiowb();
- }
- }
-
- /*
- * The following routines are SN Platform specific, called when
- * a reference is made to readX/writeX set macros. SN Platform
- * readX set of macros ensures that Posted DMA writes on the
- * Bridge is flushed.
- *
- * The routines should be self explainatory.
- */
-
- static inline unsigned char
- ___sn_readb (const volatile void __iomem *addr)
- {
- unsigned char val;
-
- val = *(volatile unsigned char __force *)addr;
- __sn_mf_a();
- sn_dma_flush((unsigned long)addr);
- return val;
- }
-
- static inline unsigned short
- ___sn_readw (const volatile void __iomem *addr)
- {
- unsigned short val;
-
- val = *(volatile unsigned short __force *)addr;
- __sn_mf_a();
- sn_dma_flush((unsigned long)addr);
- return val;
- }
-
- static inline unsigned int
- ___sn_readl (const volatile void __iomem *addr)
- {
- unsigned int val;
-
- val = *(volatile unsigned int __force *)addr;
- __sn_mf_a();
- sn_dma_flush((unsigned long)addr);
- return val;
- }
-
- static inline unsigned long
- ___sn_readq (const volatile void __iomem *addr)
- {
- unsigned long val;
-
- val = *(volatile unsigned long __force *)addr;
- __sn_mf_a();
- sn_dma_flush((unsigned long)addr);
- return val;
- }
-
- /*
- * For generic and SN2 kernels, we have a set of fast access
- * PIO macros. These macros are provided on SN Platform
- * because the normal inX and readX macros perform an
- * additional task of flushing Post DMA request on the Bridge.
- *
- * These routines should be self explainatory.
- */
-
- static inline unsigned int
- sn_inb_fast (unsigned long port)
- {
- volatile unsigned char *addr = (unsigned char *)port;
- unsigned char ret;
-
- ret = *addr;
- __sn_mf_a();
- return ret;
- }
-
- static inline unsigned int
- sn_inw_fast (unsigned long port)
- {
- volatile unsigned short *addr = (unsigned short *)port;
- unsigned short ret;
-
- ret = *addr;
- __sn_mf_a();
- return ret;
- }
-
- static inline unsigned int
- sn_inl_fast (unsigned long port)
- {
- volatile unsigned int *addr = (unsigned int *)port;
- unsigned int ret;
-
- ret = *addr;
- __sn_mf_a();
- return ret;
- }
-
- static inline unsigned char
- ___sn_readb_relaxed (const volatile void __iomem *addr)
- {
- return *(volatile unsigned char __force *)addr;
- }
-
- static inline unsigned short
- ___sn_readw_relaxed (const volatile void __iomem *addr)
- {
- return *(volatile unsigned short __force *)addr;
- }
-
- static inline unsigned int
- ___sn_readl_relaxed (const volatile void __iomem *addr)
- {
- return *(volatile unsigned int __force *) addr;
- }
-
- static inline unsigned long
- ___sn_readq_relaxed (const volatile void __iomem *addr)
- {
- return *(volatile unsigned long __force *) addr;
- }
-
- struct pci_dev;
-
- static inline int
- sn_pci_set_vchan(struct pci_dev *pci_dev, unsigned long *addr, int vchan)
- {
-
- if (vchan > 1) {
- return -1;
- }
-
- if (!(*addr >> 32)) /* Using a mask here would be cleaner */
- return 0; /* but this generates better code */
-
- if (vchan == 1) {
- /* Set Bit 57 */
- *addr |= (1UL << 57);
- } else {
- /* Clear Bit 57 */
- *addr &= ~(1UL << 57);
- }
-
- return 0;
- }
-
- #endif /* _ASM_SN_IO_H */
-