1 /* $Id: shmem.c,v 1.2.10.1 2001/09/23 22:24:59 kai Exp $
3 * Copyright (C) 1996 SpellCaster Telecommunications Inc.
5 * Card functions implementing ISDN4Linux functionality
7 * This software may be used and distributed according to the terms
8 * of the GNU General Public License, incorporated herein by reference.
10 * For more information, please contact gpl-info@spellcast.com or write:
12 * SpellCaster Telecommunications Inc.
13 * 5621 Finch Avenue East, Unit #3
14 * Scarborough, Ontario Canada
17 * +1 (416) 297-6433 Facsimile
20 #include "includes.h" /* This must be first */
27 extern board *sc_adapter[];
33 void *memcpy_toshmem(int card, void *dest, const void *src, size_t n)
39 if(!IS_VALID_CARD(card)) {
40 pr_debug("Invalid param: %d is not a valid card id\n", card);
44 if(n > SRAM_PAGESIZE) {
49 * determine the page to load from the address
51 ch = (unsigned long) dest / SRAM_PAGESIZE;
52 pr_debug("%s: loaded page %d\n", sc_adapter[card]->devicename,ch);
54 * Block interrupts and load the page
56 spin_lock_irqsave(&sc_adapter[card]->lock, flags);
58 outb(((sc_adapter[card]->shmem_magic + ch * SRAM_PAGESIZE) >> 14) | 0x80,
59 sc_adapter[card]->ioport[sc_adapter[card]->shmem_pgport]);
60 ret = memcpy_toio(sc_adapter[card]->rambase +
61 ((unsigned long) dest % 0x4000), src, n);
62 spin_unlock_irqrestore(&sc_adapter[card]->lock, flags);
63 pr_debug("%s: set page to %#x\n",sc_adapter[card]->devicename,
64 ((sc_adapter[card]->shmem_magic + ch * SRAM_PAGESIZE)>>14)|0x80);
65 pr_debug("%s: copying %d bytes from %#x to %#x\n",
66 sc_adapter[card]->devicename, n,
68 sc_adapter[card]->rambase + ((unsigned long) dest %0x4000));
76 void *memcpy_fromshmem(int card, void *dest, const void *src, size_t n)
82 if(!IS_VALID_CARD(card)) {
83 pr_debug("Invalid param: %d is not a valid card id\n", card);
87 if(n > SRAM_PAGESIZE) {
92 * determine the page to load from the address
94 ch = (unsigned long) src / SRAM_PAGESIZE;
95 pr_debug("%s: loaded page %d\n", sc_adapter[card]->devicename,ch);
99 * Block interrupts and load the page
101 spin_lock_irqsave(&sc_adapter[card]->lock, flags);
103 outb(((sc_adapter[card]->shmem_magic + ch * SRAM_PAGESIZE) >> 14) | 0x80,
104 sc_adapter[card]->ioport[sc_adapter[card]->shmem_pgport]);
105 ret = memcpy_fromio(dest,(void *)(sc_adapter[card]->rambase +
106 ((unsigned long) src % 0x4000)), n);
107 spin_unlock_irqrestore(&sc_adapter[card]->lock, flags);
108 pr_debug("%s: set page to %#x\n",sc_adapter[card]->devicename,
109 ((sc_adapter[card]->shmem_magic + ch * SRAM_PAGESIZE)>>14)|0x80);
110 /* pr_debug("%s: copying %d bytes from %#x to %#x\n",
111 sc_adapter[card]->devicename, n,
112 sc_adapter[card]->rambase + ((unsigned long) src %0x4000), (unsigned long) dest); */
117 void *memset_shmem(int card, void *dest, int c, size_t n)
123 if(!IS_VALID_CARD(card)) {
124 pr_debug("Invalid param: %d is not a valid card id\n", card);
128 if(n > SRAM_PAGESIZE) {
133 * determine the page to load from the address
135 ch = (unsigned long) dest / SRAM_PAGESIZE;
136 pr_debug("%s: loaded page %d\n",sc_adapter[card]->devicename,ch);
139 * Block interrupts and load the page
141 spin_lock_irqsave(&sc_adapter[card]->lock, flags);
143 outb(((sc_adapter[card]->shmem_magic + ch * SRAM_PAGESIZE) >> 14) | 0x80,
144 sc_adapter[card]->ioport[sc_adapter[card]->shmem_pgport]);
145 ret = memset_io(sc_adapter[card]->rambase +
146 ((unsigned long) dest % 0x4000), c, n);
147 pr_debug("%s: set page to %#x\n",sc_adapter[card]->devicename,
148 ((sc_adapter[card]->shmem_magic + ch * SRAM_PAGESIZE)>>14)|0x80);
149 spin_unlock_irqrestore(&sc_adapter[card]->lock, flags);