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/* $Id: shmem.c,v 1.1.4.1 2001/11/20 14:19:37 kai Exp $
*
* Copyright (C) 1996 SpellCaster Telecommunications Inc.
*
* Card functions implementing ISDN4Linux functionality
*
* This software may be used and distributed according to the terms
* of the GNU General Public License, incorporated herein by reference.
*
* 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;
}
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