1/* $Id: shmem.c,v 1.1.1.1 2007/08/03 18:52:36 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#include "includes.h"		/* This must be first */
21#include "hardware.h"
22#include "card.h"
23
24/*
25 *
26 */
27void memcpy_toshmem(int card, void *dest, const void *src, size_t n)
28{
29	unsigned long flags;
30	unsigned char ch;
31
32	if(!IS_VALID_CARD(card)) {
33		pr_debug("Invalid param: %d is not a valid card id\n", card);
34		return;
35	}
36
37	if(n > SRAM_PAGESIZE) {
38		return;
39	}
40
41	/*
42	 * determine the page to load from the address
43	 */
44	ch = (unsigned long) dest / SRAM_PAGESIZE;
45	pr_debug("%s: loaded page %d\n", sc_adapter[card]->devicename,ch);
46	/*
47	 * Block interrupts and load the page
48	 */
49	spin_lock_irqsave(&sc_adapter[card]->lock, flags);
50
51	outb(((sc_adapter[card]->shmem_magic + ch * SRAM_PAGESIZE) >> 14) | 0x80,
52		sc_adapter[card]->ioport[sc_adapter[card]->shmem_pgport]);
53	memcpy_toio(sc_adapter[card]->rambase +
54		((unsigned long) dest % 0x4000), src, n);
55	spin_unlock_irqrestore(&sc_adapter[card]->lock, flags);
56	pr_debug("%s: set page to %#x\n",sc_adapter[card]->devicename,
57		((sc_adapter[card]->shmem_magic + ch * SRAM_PAGESIZE)>>14)|0x80);
58	pr_debug("%s: copying %d bytes from %#lx to %#lx\n",
59		sc_adapter[card]->devicename, n,
60		(unsigned long) src,
61		sc_adapter[card]->rambase + ((unsigned long) dest %0x4000));
62}
63
64/*
65 * Reverse of above
66 */
67void memcpy_fromshmem(int card, void *dest, const void *src, size_t n)
68{
69	unsigned long flags;
70	unsigned char ch;
71
72	if(!IS_VALID_CARD(card)) {
73		pr_debug("Invalid param: %d is not a valid card id\n", card);
74		return;
75	}
76
77	if(n > SRAM_PAGESIZE) {
78		return;
79	}
80
81	/*
82	 * determine the page to load from the address
83	 */
84	ch = (unsigned long) src / SRAM_PAGESIZE;
85	pr_debug("%s: loaded page %d\n", sc_adapter[card]->devicename,ch);
86
87
88	/*
89	 * Block interrupts and load the page
90	 */
91	spin_lock_irqsave(&sc_adapter[card]->lock, flags);
92
93	outb(((sc_adapter[card]->shmem_magic + ch * SRAM_PAGESIZE) >> 14) | 0x80,
94		sc_adapter[card]->ioport[sc_adapter[card]->shmem_pgport]);
95	memcpy_fromio(dest,(void *)(sc_adapter[card]->rambase +
96		((unsigned long) src % 0x4000)), n);
97	spin_unlock_irqrestore(&sc_adapter[card]->lock, flags);
98	pr_debug("%s: set page to %#x\n",sc_adapter[card]->devicename,
99		((sc_adapter[card]->shmem_magic + ch * SRAM_PAGESIZE)>>14)|0x80);
100/*	pr_debug("%s: copying %d bytes from %#x to %#x\n",
101		sc_adapter[card]->devicename, n,
102		sc_adapter[card]->rambase + ((unsigned long) src %0x4000), (unsigned long) dest); */
103}
104