1 /* $Id: shmem.c,v 1.1.4.1 2001/11/20 14:19:37 kai Exp $
2 *
3 * Copyright (C) 1996 SpellCaster Telecommunications Inc.
4 *
5 * Card functions implementing ISDN4Linux functionality
6 *
7 * This software may be used and distributed according to the terms
8 * of the GNU General Public License, incorporated herein by reference.
9 *
10 * For more information, please contact gpl-info@spellcast.com or write:
11 *
12 * SpellCaster Telecommunications Inc.
13 * 5621 Finch Avenue East, Unit #3
14 * Scarborough, Ontario Canada
15 * M1B 2T9
16 * +1 (416) 297-8565
17 * +1 (416) 297-6433 Facsimile
18 */
19
20 #define __NO_VERSION__
21 #include "includes.h" /* This must be first */
22 #include "hardware.h"
23 #include "card.h"
24
25 /*
26 * Main adapter array
27 */
28 extern board *adapter[];
29 extern int cinst;
30
31 /*
32 *
33 */
memcpy_toshmem(int card,void * dest,const void * src,size_t n)34 void *memcpy_toshmem(int card, void *dest, const void *src, size_t n)
35 {
36 unsigned long flags;
37 void *ret;
38 unsigned char ch;
39
40 if(!IS_VALID_CARD(card)) {
41 pr_debug("Invalid param: %d is not a valid card id\n", card);
42 return NULL;
43 }
44
45 if(n > SRAM_PAGESIZE) {
46 return NULL;
47 }
48
49 /*
50 * determine the page to load from the address
51 */
52 ch = (unsigned long) dest / SRAM_PAGESIZE;
53 pr_debug("%s: loaded page %d\n",adapter[card]->devicename,ch);
54 /*
55 * Block interrupts and load the page
56 */
57 save_flags(flags);
58 cli();
59
60 outb(((adapter[card]->shmem_magic + ch * SRAM_PAGESIZE) >> 14) | 0x80,
61 adapter[card]->ioport[adapter[card]->shmem_pgport]);
62 pr_debug("%s: set page to %#x\n",adapter[card]->devicename,
63 ((adapter[card]->shmem_magic + ch * SRAM_PAGESIZE)>>14)|0x80);
64 ret = memcpy_toio(adapter[card]->rambase +
65 ((unsigned long) dest % 0x4000), src, n);
66 pr_debug("%s: copying %d bytes from %#x to %#x\n",adapter[card]->devicename, n,
67 (unsigned long) src, adapter[card]->rambase + ((unsigned long) dest %0x4000));
68 restore_flags(flags);
69
70 return ret;
71 }
72
73 /*
74 * Reverse of above
75 */
memcpy_fromshmem(int card,void * dest,const void * src,size_t n)76 void *memcpy_fromshmem(int card, void *dest, const void *src, size_t n)
77 {
78 unsigned long flags;
79 void *ret;
80 unsigned char ch;
81
82 if(!IS_VALID_CARD(card)) {
83 pr_debug("Invalid param: %d is not a valid card id\n", card);
84 return NULL;
85 }
86
87 if(n > SRAM_PAGESIZE) {
88 return NULL;
89 }
90
91 /*
92 * determine the page to load from the address
93 */
94 ch = (unsigned long) src / SRAM_PAGESIZE;
95 pr_debug("%s: loaded page %d\n",adapter[card]->devicename,ch);
96
97
98 /*
99 * Block interrupts and load the page
100 */
101 save_flags(flags);
102 cli();
103
104 outb(((adapter[card]->shmem_magic + ch * SRAM_PAGESIZE) >> 14) | 0x80,
105 adapter[card]->ioport[adapter[card]->shmem_pgport]);
106 pr_debug("%s: set page to %#x\n",adapter[card]->devicename,
107 ((adapter[card]->shmem_magic + ch * SRAM_PAGESIZE)>>14)|0x80);
108 ret = memcpy_fromio(dest,(void *)(adapter[card]->rambase +
109 ((unsigned long) src % 0x4000)), n);
110 /* pr_debug("%s: copying %d bytes from %#x to %#x\n",
111 adapter[card]->devicename, n,
112 adapter[card]->rambase + ((unsigned long) src %0x4000), (unsigned long) dest); */
113 restore_flags(flags);
114
115 return ret;
116 }
117
memset_shmem(int card,void * dest,int c,size_t n)118 void *memset_shmem(int card, void *dest, int c, size_t n)
119 {
120 unsigned long flags;
121 unsigned char ch;
122 void *ret;
123
124 if(!IS_VALID_CARD(card)) {
125 pr_debug("Invalid param: %d is not a valid card id\n", card);
126 return NULL;
127 }
128
129 if(n > SRAM_PAGESIZE) {
130 return NULL;
131 }
132
133 /*
134 * determine the page to load from the address
135 */
136 ch = (unsigned long) dest / SRAM_PAGESIZE;
137 pr_debug("%s: loaded page %d\n",adapter[card]->devicename,ch);
138
139 /*
140 * Block interrupts and load the page
141 */
142 save_flags(flags);
143 cli();
144
145 outb(((adapter[card]->shmem_magic + ch * SRAM_PAGESIZE) >> 14) | 0x80,
146 adapter[card]->ioport[adapter[card]->shmem_pgport]);
147 pr_debug("%s: set page to %#x\n",adapter[card]->devicename,
148 ((adapter[card]->shmem_magic + ch * SRAM_PAGESIZE)>>14)|0x80);
149 ret = memset_io(adapter[card]->rambase +
150 ((unsigned long) dest % 0x4000), c, n);
151 restore_flags(flags);
152
153 return ret;
154 }
155