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7f30491ccd
After moving the the include files there were a few clean-ups: 1) Some files used #include <asm-ia64/xyz.h>, changed to <asm/xyz.h> 2) Some comments alerted maintainers to look at various header files to make matching updates if certain code were to be changed. Updated these comments to use the new include paths. 3) Some header files mentioned their own names in initial comments. Just deleted these self references. Signed-off-by: Tony Luck <tony.luck@intel.com>
83 lines
2.2 KiB
C
83 lines
2.2 KiB
C
/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 2000-2003, 2006 Silicon Graphics, Inc. All rights reserved.
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*/
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#include <linux/module.h>
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#include <linux/acpi.h>
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#include <asm/io.h>
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#include <asm/delay.h>
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#include <asm/vga.h>
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#include <asm/sn/nodepda.h>
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#include <asm/sn/simulator.h>
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#include <asm/sn/pda.h>
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#include <asm/sn/sn_cpuid.h>
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#include <asm/sn/shub_mmr.h>
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#include <asm/sn/acpi.h>
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#define IS_LEGACY_VGA_IOPORT(p) \
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(((p) >= 0x3b0 && (p) <= 0x3bb) || ((p) >= 0x3c0 && (p) <= 0x3df))
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/**
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* sn_io_addr - convert an in/out port to an i/o address
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* @port: port to convert
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*
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* Legacy in/out instructions are converted to ld/st instructions
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* on IA64. This routine will convert a port number into a valid
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* SN i/o address. Used by sn_in*() and sn_out*().
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*/
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void *sn_io_addr(unsigned long port)
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{
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if (!IS_RUNNING_ON_SIMULATOR()) {
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if (IS_LEGACY_VGA_IOPORT(port))
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return (__ia64_mk_io_addr(port));
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/* On sn2, legacy I/O ports don't point at anything */
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if (port < (64 * 1024))
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return NULL;
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if (SN_ACPI_BASE_SUPPORT())
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return (__ia64_mk_io_addr(port));
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else
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return ((void *)(port | __IA64_UNCACHED_OFFSET));
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} else {
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/* but the simulator uses them... */
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unsigned long addr;
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/*
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* word align port, but need more than 10 bits
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* for accessing registers in bedrock local block
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* (so we don't do port&0xfff)
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*/
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addr = (is_shub2() ? 0xc00000028c000000UL : 0xc0000087cc000000UL) | ((port >> 2) << 12);
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if ((port >= 0x1f0 && port <= 0x1f7) || port == 0x3f6 || port == 0x3f7)
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addr |= port;
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return (void *)addr;
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}
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}
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EXPORT_SYMBOL(sn_io_addr);
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/**
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* __sn_mmiowb - I/O space memory barrier
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*
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* See arch/ia64/include/asm/io.h and Documentation/DocBook/deviceiobook.tmpl
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* for details.
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*
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* On SN2, we wait for the PIO_WRITE_STATUS SHub register to clear.
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* See PV 871084 for details about the WAR about zero value.
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*
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*/
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void __sn_mmiowb(void)
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{
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volatile unsigned long *adr = pda->pio_write_status_addr;
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unsigned long val = pda->pio_write_status_val;
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while ((*adr & SH_PIO_WRITE_STATUS_PENDING_WRITE_COUNT_MASK) != val)
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cpu_relax();
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}
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EXPORT_SYMBOL(__sn_mmiowb);
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