83 строки
2.2 KiB
C
83 строки
2.2 KiB
C
/*
|
|
* 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) 2000-2003, 2006 Silicon Graphics, Inc. All rights reserved.
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/acpi.h>
|
|
#include <asm/io.h>
|
|
#include <asm/delay.h>
|
|
#include <asm/vga.h>
|
|
#include <asm/sn/nodepda.h>
|
|
#include <asm/sn/simulator.h>
|
|
#include <asm/sn/pda.h>
|
|
#include <asm/sn/sn_cpuid.h>
|
|
#include <asm/sn/shub_mmr.h>
|
|
#include <asm/sn/acpi.h>
|
|
|
|
#define IS_LEGACY_VGA_IOPORT(p) \
|
|
(((p) >= 0x3b0 && (p) <= 0x3bb) || ((p) >= 0x3c0 && (p) <= 0x3df))
|
|
|
|
/**
|
|
* sn_io_addr - convert an in/out port to an i/o address
|
|
* @port: port to convert
|
|
*
|
|
* Legacy in/out instructions are converted to ld/st instructions
|
|
* on IA64. This routine will convert a port number into a valid
|
|
* SN i/o address. Used by sn_in*() and sn_out*().
|
|
*/
|
|
|
|
void *sn_io_addr(unsigned long port)
|
|
{
|
|
if (!IS_RUNNING_ON_SIMULATOR()) {
|
|
if (IS_LEGACY_VGA_IOPORT(port))
|
|
return (__ia64_mk_io_addr(port));
|
|
/* On sn2, legacy I/O ports don't point at anything */
|
|
if (port < (64 * 1024))
|
|
return NULL;
|
|
if (SN_ACPI_BASE_SUPPORT())
|
|
return (__ia64_mk_io_addr(port));
|
|
else
|
|
return ((void *)(port | __IA64_UNCACHED_OFFSET));
|
|
} else {
|
|
/* but the simulator uses them... */
|
|
unsigned long addr;
|
|
|
|
/*
|
|
* word align port, but need more than 10 bits
|
|
* for accessing registers in bedrock local block
|
|
* (so we don't do port&0xfff)
|
|
*/
|
|
addr = (is_shub2() ? 0xc00000028c000000UL : 0xc0000087cc000000UL) | ((port >> 2) << 12);
|
|
if ((port >= 0x1f0 && port <= 0x1f7) || port == 0x3f6 || port == 0x3f7)
|
|
addr |= port;
|
|
return (void *)addr;
|
|
}
|
|
}
|
|
|
|
EXPORT_SYMBOL(sn_io_addr);
|
|
|
|
/**
|
|
* __sn_mmiowb - I/O space memory barrier
|
|
*
|
|
* See arch/ia64/include/asm/io.h and Documentation/driver-api/device-io.rst
|
|
* for details.
|
|
*
|
|
* On SN2, we wait for the PIO_WRITE_STATUS SHub register to clear.
|
|
* See PV 871084 for details about the WAR about zero value.
|
|
*
|
|
*/
|
|
void __sn_mmiowb(void)
|
|
{
|
|
volatile unsigned long *adr = pda->pio_write_status_addr;
|
|
unsigned long val = pda->pio_write_status_val;
|
|
|
|
while ((*adr & SH_PIO_WRITE_STATUS_PENDING_WRITE_COUNT_MASK) != val)
|
|
cpu_relax();
|
|
}
|
|
|
|
EXPORT_SYMBOL(__sn_mmiowb);
|