projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| ad71860a | 1 | /* |
| 1da177e4 LT |
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 | |
| 4 | * for more details. | |
| 5 | * | |
| 8ea6091f | 6 | * Copyright (C) 2000-2003, 2006 Silicon Graphics, Inc. All rights reserved. |
| 1da177e4 LT |
7 | */ |
| 8 | ||
| 9 | #include <linux/module.h> | |
| 8ea6091f | 10 | #include <linux/acpi.h> |
| 1da177e4 LT |
11 | #include <asm/io.h> |
| 12 | #include <asm/delay.h> | |
| a9f9de73 | 13 | #include <asm/vga.h> |
| 1da177e4 LT |
14 | #include <asm/sn/nodepda.h> |
| 15 | #include <asm/sn/simulator.h> | |
| 16 | #include <asm/sn/pda.h> | |
| 17 | #include <asm/sn/sn_cpuid.h> | |
| 18 | #include <asm/sn/shub_mmr.h> | |
| 19 | ||
| a9f9de73 MM |
20 | #define IS_LEGACY_VGA_IOPORT(p) \ |
| 21 | (((p) >= 0x3b0 && (p) <= 0x3bb) || ((p) >= 0x3c0 && (p) <= 0x3df)) | |
| 22 | ||
| 1da177e4 LT |
23 | /** |
| 24 | * sn_io_addr - convert an in/out port to an i/o address | |
| 25 | * @port: port to convert | |
| 26 | * | |
| 27 | * Legacy in/out instructions are converted to ld/st instructions | |
| ad71860a | 28 | * on IA64. This routine will convert a port number into a valid |
| 1da177e4 LT |
29 | * SN i/o address. Used by sn_in*() and sn_out*(). |
| 30 | */ | |
| ad71860a AS |
31 | |
| 32 | extern int sn_acpi_base_support(); | |
| 33 | ||
| 1da177e4 LT |
34 | void *sn_io_addr(unsigned long port) |
| 35 | { | |
| 36 | if (!IS_RUNNING_ON_SIMULATOR()) { | |
| a9f9de73 | 37 | if (IS_LEGACY_VGA_IOPORT(port)) |
| 8ea6091f | 38 | return (__ia64_mk_io_addr(port)); |
| 1da177e4 LT |
39 | /* On sn2, legacy I/O ports don't point at anything */ |
| 40 | if (port < (64 * 1024)) | |
| 41 | return NULL; | |
| ad71860a | 42 | if (sn_acpi_base_support()) |
| 8ea6091f JK |
43 | return (__ia64_mk_io_addr(port)); |
| 44 | else | |
| 45 | return ((void *)(port | __IA64_UNCACHED_OFFSET)); | |
| 1da177e4 LT |
46 | } else { |
| 47 | /* but the simulator uses them... */ | |
| 48 | unsigned long addr; | |
| 49 | ||
| 50 | /* | |
| 51 | * word align port, but need more than 10 bits | |
| 52 | * for accessing registers in bedrock local block | |
| 53 | * (so we don't do port&0xfff) | |
| 54 | */ | |
| 55 | addr = (is_shub2() ? 0xc00000028c000000UL : 0xc0000087cc000000UL) | ((port >> 2) << 12); | |
| 56 | if ((port >= 0x1f0 && port <= 0x1f7) || port == 0x3f6 || port == 0x3f7) | |
| 57 | addr |= port; | |
| 58 | return (void *)addr; | |
| 59 | } | |
| 60 | } | |
| 61 | ||
| 62 | EXPORT_SYMBOL(sn_io_addr); | |
| 63 | ||
| 64 | /** | |
| 65 | * __sn_mmiowb - I/O space memory barrier | |
| 66 | * | |
| 67 | * See include/asm-ia64/io.h and Documentation/DocBook/deviceiobook.tmpl | |
| 68 | * for details. | |
| 69 | * | |
| 70 | * On SN2, we wait for the PIO_WRITE_STATUS SHub register to clear. | |
| 71 | * See PV 871084 for details about the WAR about zero value. | |
| 72 | * | |
| 73 | */ | |
| 74 | void __sn_mmiowb(void) | |
| 75 | { | |
| 76 | volatile unsigned long *adr = pda->pio_write_status_addr; | |
| 77 | unsigned long val = pda->pio_write_status_val; | |
| 78 | ||
| 79 | while ((*adr & SH_PIO_WRITE_STATUS_PENDING_WRITE_COUNT_MASK) != val) | |
| 80 | cpu_relax(); | |
| 81 | } | |
| 82 | ||
| 83 | EXPORT_SYMBOL(__sn_mmiowb); |