shmem.c
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/* $Id: shmem.c,v 1.2.10.1 2001/09/23 22:24:59 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
*/
#include "includes.h" /* This must be first */
#include "hardware.h"
#include "card.h"
/*
*
*/
void memcpy_toshmem(int card, void *dest, const void *src, size_t n)
{
unsigned long flags;
unsigned char ch;
unsigned long dest_rem = ((unsigned long) dest) % 0x4000;
if (!IS_VALID_CARD(card)) {
pr_debug("Invalid param: %d is not a valid card id\n", card);
return;
}
if (n > SRAM_PAGESIZE)
return;
/*
* determine the page to load from the address
*/
ch = (unsigned long) dest / SRAM_PAGESIZE;
pr_debug("%s: loaded page %d\n", sc_adapter[card]->devicename, ch);
/*
* Block interrupts and load the page
*/
spin_lock_irqsave(&sc_adapter[card]->lock, flags);
outb(((sc_adapter[card]->shmem_magic + ch * SRAM_PAGESIZE) >> 14) | 0x80,
sc_adapter[card]->ioport[sc_adapter[card]->shmem_pgport]);
memcpy_toio((void __iomem *)(sc_adapter[card]->rambase + dest_rem), src, n);
spin_unlock_irqrestore(&sc_adapter[card]->lock, flags);
pr_debug("%s: set page to %#x\n", sc_adapter[card]->devicename,
((sc_adapter[card]->shmem_magic + ch * SRAM_PAGESIZE) >> 14) | 0x80);
pr_debug("%s: copying %zu bytes from %#lx to %#lx\n",
sc_adapter[card]->devicename, n,
(unsigned long) src,
sc_adapter[card]->rambase + ((unsigned long) dest % 0x4000));
}
/*
* Reverse of above
*/
void memcpy_fromshmem(int card, void *dest, const void *src, size_t n)
{
unsigned long flags;
unsigned char ch;
if (!IS_VALID_CARD(card)) {
pr_debug("Invalid param: %d is not a valid card id\n", card);
return;
}
if (n > SRAM_PAGESIZE) {
return;
}
/*
* determine the page to load from the address
*/
ch = (unsigned long) src / SRAM_PAGESIZE;
pr_debug("%s: loaded page %d\n", sc_adapter[card]->devicename, ch);
/*
* Block interrupts and load the page
*/
spin_lock_irqsave(&sc_adapter[card]->lock, flags);
outb(((sc_adapter[card]->shmem_magic + ch * SRAM_PAGESIZE) >> 14) | 0x80,
sc_adapter[card]->ioport[sc_adapter[card]->shmem_pgport]);
memcpy_fromio(dest, (void *)(sc_adapter[card]->rambase +
((unsigned long) src % 0x4000)), n);
spin_unlock_irqrestore(&sc_adapter[card]->lock, flags);
pr_debug("%s: set page to %#x\n", sc_adapter[card]->devicename,
((sc_adapter[card]->shmem_magic + ch * SRAM_PAGESIZE) >> 14) | 0x80);
/* pr_debug("%s: copying %d bytes from %#x to %#x\n",
sc_adapter[card]->devicename, n,
sc_adapter[card]->rambase + ((unsigned long) src %0x4000), (unsigned long) dest); */
}
#if 0
void memset_shmem(int card, void *dest, int c, size_t n)
{
unsigned long flags;
unsigned char ch;
if (!IS_VALID_CARD(card)) {
pr_debug("Invalid param: %d is not a valid card id\n", card);
return;
}
if (n > SRAM_PAGESIZE) {
return;
}
/*
* determine the page to load from the address
*/
ch = (unsigned long) dest / SRAM_PAGESIZE;
pr_debug("%s: loaded page %d\n", sc_adapter[card]->devicename, ch);
/*
* Block interrupts and load the page
*/
spin_lock_irqsave(&sc_adapter[card]->lock, flags);
outb(((sc_adapter[card]->shmem_magic + ch * SRAM_PAGESIZE) >> 14) | 0x80,
sc_adapter[card]->ioport[sc_adapter[card]->shmem_pgport]);
memset_io(sc_adapter[card]->rambase +
((unsigned long) dest % 0x4000), c, n);
pr_debug("%s: set page to %#x\n", sc_adapter[card]->devicename,
((sc_adapter[card]->shmem_magic + ch * SRAM_PAGESIZE) >> 14) | 0x80);
spin_unlock_irqrestore(&sc_adapter[card]->lock, flags);
}
#endif /* 0 */