patch-2.1.27 linux/drivers/isdn/sc/shmem.c

• Lines: 166
• Date: Tue Feb 25 17:12:50 1997
• Orig file: v2.1.26/linux/drivers/isdn/sc/shmem.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.26/linux/drivers/isdn/sc/shmem.c linux/drivers/isdn/sc/shmem.c
@@ -0,0 +1,165 @@
+/*
+ *  $Id: shmem.c,v 1.2 1996/11/20 17:49:56 fritz Exp $
+ *  Copyright (C) 1996  SpellCaster Telecommunications Inc.
+ *
+ *  card.c - Card functions implementing ISDN4Linux functionality
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ *  For more information, please contact gpl-info@spellcast.com or write:
+ *
+ *     SpellCaster Telecommunications Inc.
+ *     5621 Finch Avenue East, Unit #3
+ *     Scarborough, Ontario  Canada
+ *     M1B 2T9
+ *     +1 (416) 297-8565
+ *     +1 (416) 297-6433 Facsimile
+ */
+
+#define __NO_VERSION__
+#include "includes.h"		/* This must be first */
+#include "hardware.h"
+#include "card.h"
+
+/*
+ * Main adapter array
+ */
+extern board *adapter[];
+extern int cinst;
+
+/*
+ *
+ */
+void *memcpy_toshmem(int card, void *dest, const void *src, size_t n)
+{
+	unsigned long flags;
+	void *ret;
+	unsigned char ch;
+
+	if(!IS_VALID_CARD(card)) {
+		pr_debug("Invalid param: %d is not a valid card id\n", card);
+		return NULL;
+	}
+
+	if(n > SRAM_PAGESIZE) {
+		return NULL;
+	}
+
+	/*
+	 * determine the page to load from the address
+	 */
+	ch = (unsigned long) dest / SRAM_PAGESIZE;
+	pr_debug("%s: loaded page %d\n",adapter[card]->devicename,ch);
+	/*
+	 * Block interrupts and load the page
+	 */
+	save_flags(flags);
+	cli();
+
+	outb(((adapter[card]->shmem_magic + ch * SRAM_PAGESIZE) >> 14) | 0x80,
+		adapter[card]->ioport[adapter[card]->shmem_pgport]);
+	pr_debug("%s: set page to %#x\n",adapter[card]->devicename,
+		((adapter[card]->shmem_magic + ch * SRAM_PAGESIZE)>>14)|0x80);
+	ret = memcpy_toio(adapter[card]->rambase + 
+		((unsigned long) dest % 0x4000), src, n);
+	pr_debug("%s: copying %d bytes from %#x to %#x\n",adapter[card]->devicename, n,
+		 (unsigned long) src, adapter[card]->rambase + ((unsigned long) dest %0x4000));
+	restore_flags(flags);
+
+	return ret;
+}
+
+/*
+ * Reverse of above
+ */
+void *memcpy_fromshmem(int card, void *dest, const void *src, size_t n)
+{
+	unsigned long flags;
+	void *ret;
+	unsigned char ch;
+
+	if(!IS_VALID_CARD(card)) {
+		pr_debug("Invalid param: %d is not a valid card id\n", card);
+		return NULL;
+	}
+
+	if(n > SRAM_PAGESIZE) {
+		return NULL;
+	}
+
+	/*
+	 * determine the page to load from the address
+	 */
+	ch = (unsigned long) src / SRAM_PAGESIZE;
+	pr_debug("%s: loaded page %d\n",adapter[card]->devicename,ch);
+	
+	
+	/*
+	 * Block interrupts and load the page
+	 */
+	save_flags(flags);
+	cli();
+
+	outb(((adapter[card]->shmem_magic + ch * SRAM_PAGESIZE) >> 14) | 0x80,
+		adapter[card]->ioport[adapter[card]->shmem_pgport]);
+	pr_debug("%s: set page to %#x\n",adapter[card]->devicename,
+		((adapter[card]->shmem_magic + ch * SRAM_PAGESIZE)>>14)|0x80);
+	ret = memcpy_fromio(dest,(void *)(adapter[card]->rambase + 
+		((unsigned long) src % 0x4000)), n);
+/*	pr_debug("%s: copying %d bytes from %#x to %#x\n",
+		adapter[card]->devicename, n,
+		adapter[card]->rambase + ((unsigned long) src %0x4000), (unsigned long) dest); */
+	restore_flags(flags);
+
+	return ret;
+}
+
+void *memset_shmem(int card, void *dest, int c, size_t n)
+{
+	unsigned long flags;
+	unsigned char ch;
+	void *ret;
+
+	if(!IS_VALID_CARD(card)) {
+		pr_debug("Invalid param: %d is not a valid card id\n", card);
+		return NULL;
+	}
+
+	if(n > SRAM_PAGESIZE) {
+		return NULL;
+	}
+
+	/*
+	 * determine the page to load from the address
+	 */
+	ch = (unsigned long) dest / SRAM_PAGESIZE;
+	pr_debug("%s: loaded page %d\n",adapter[card]->devicename,ch);
+
+	/*
+	 * Block interrupts and load the page
+	 */
+	save_flags(flags);
+	cli();
+
+	outb(((adapter[card]->shmem_magic + ch * SRAM_PAGESIZE) >> 14) | 0x80,
+		adapter[card]->ioport[adapter[card]->shmem_pgport]);
+	pr_debug("%s: set page to %#x\n",adapter[card]->devicename,
+		((adapter[card]->shmem_magic + ch * SRAM_PAGESIZE)>>14)|0x80);
+	ret = memset_io(adapter[card]->rambase + 
+		((unsigned long) dest % 0x4000), c, n);
+	restore_flags(flags);
+
+	return ret;
+}