1/* $Id: shmem.c,v 1.2.10.1 2001/09/23 22:24:59 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#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	unsigned long dest_rem = ((unsigned long) dest) % 0x4000;
32
33	if (!IS_VALID_CARD(card)) {
34		pr_debug("Invalid param: %d is not a valid card id\n", card);
35		return;
36	}
37
38	if (n > SRAM_PAGESIZE)
39		return;
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((void __iomem *)(sc_adapter[card]->rambase + dest_rem), src, n);
54	spin_unlock_irqrestore(&sc_adapter[card]->lock, flags);
55	pr_debug("%s: set page to %#x\n", sc_adapter[card]->devicename,
56		 ((sc_adapter[card]->shmem_magic + ch * SRAM_PAGESIZE) >> 14) | 0x80);
57	pr_debug("%s: copying %zu bytes from %#lx to %#lx\n",
58		 sc_adapter[card]->devicename, n,
59		 (unsigned long) src,
60		 sc_adapter[card]->rambase + ((unsigned long) dest % 0x4000));
61}
62
63/*
64 * Reverse of above
65 */
66void memcpy_fromshmem(int card, void *dest, const void *src, size_t n)
67{
68	unsigned long flags;
69	unsigned char ch;
70
71	if (!IS_VALID_CARD(card)) {
72		pr_debug("Invalid param: %d is not a valid card id\n", card);
73		return;
74	}
75
76	if (n > SRAM_PAGESIZE) {
77		return;
78	}
79
80	/*
81	 * determine the page to load from the address
82	 */
83	ch = (unsigned long) src / SRAM_PAGESIZE;
84	pr_debug("%s: loaded page %d\n", sc_adapter[card]->devicename, ch);
85
86
87	/*
88	 * Block interrupts and load the page
89	 */
90	spin_lock_irqsave(&sc_adapter[card]->lock, flags);
91
92	outb(((sc_adapter[card]->shmem_magic + ch * SRAM_PAGESIZE) >> 14) | 0x80,
93	     sc_adapter[card]->ioport[sc_adapter[card]->shmem_pgport]);
94	memcpy_fromio(dest, (void *)(sc_adapter[card]->rambase +
95				     ((unsigned long) src % 0x4000)), n);
96	spin_unlock_irqrestore(&sc_adapter[card]->lock, flags);
97	pr_debug("%s: set page to %#x\n", sc_adapter[card]->devicename,
98		 ((sc_adapter[card]->shmem_magic + ch * SRAM_PAGESIZE) >> 14) | 0x80);
99/*	pr_debug("%s: copying %d bytes from %#x to %#x\n",
100	sc_adapter[card]->devicename, n,
101	sc_adapter[card]->rambase + ((unsigned long) src %0x4000), (unsigned long) dest); */
102}
103
104#if 0
105void memset_shmem(int card, void *dest, int c, size_t n)
106{
107	unsigned long flags;
108	unsigned char ch;
109
110	if (!IS_VALID_CARD(card)) {
111		pr_debug("Invalid param: %d is not a valid card id\n", card);
112		return;
113	}
114
115	if (n > SRAM_PAGESIZE) {
116		return;
117	}
118
119	/*
120	 * determine the page to load from the address
121	 */
122	ch = (unsigned long) dest / SRAM_PAGESIZE;
123	pr_debug("%s: loaded page %d\n", sc_adapter[card]->devicename, ch);
124
125	/*
126	 * Block interrupts and load the page
127	 */
128	spin_lock_irqsave(&sc_adapter[card]->lock, flags);
129
130	outb(((sc_adapter[card]->shmem_magic + ch * SRAM_PAGESIZE) >> 14) | 0x80,
131	     sc_adapter[card]->ioport[sc_adapter[card]->shmem_pgport]);
132	memset_io(sc_adapter[card]->rambase +
133		  ((unsigned long) dest % 0x4000), c, n);
134	pr_debug("%s: set page to %#x\n", sc_adapter[card]->devicename,
135		 ((sc_adapter[card]->shmem_magic + ch * SRAM_PAGESIZE) >> 14) | 0x80);
136	spin_unlock_irqrestore(&sc_adapter[card]->lock, flags);
137}
138#endif  /*  0  */
139