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138 lines
3.9 KiB
138 lines
3.9 KiB
/* $Id: shmem.c,v 1.2.10.1 2001/09/23 22:24:59 kai Exp $
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*
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* Copyright (C) 1996 SpellCaster Telecommunications Inc.
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*
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* Card functions implementing ISDN4Linux functionality
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*
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* This software may be used and distributed according to the terms
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* of the GNU General Public License, incorporated herein by reference.
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*
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* For more information, please contact gpl-info@spellcast.com or write:
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*
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* SpellCaster Telecommunications Inc.
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* 5621 Finch Avenue East, Unit #3
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* Scarborough, Ontario Canada
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* M1B 2T9
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* +1 (416) 297-8565
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* +1 (416) 297-6433 Facsimile
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*/
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#include "includes.h" /* This must be first */
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#include "hardware.h"
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#include "card.h"
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/*
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*
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*/
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void memcpy_toshmem(int card, void *dest, const void *src, size_t n)
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{
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unsigned long flags;
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unsigned char ch;
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unsigned long dest_rem = ((unsigned long) dest) % 0x4000;
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if (!IS_VALID_CARD(card)) {
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pr_debug("Invalid param: %d is not a valid card id\n", card);
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return;
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}
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if (n > SRAM_PAGESIZE)
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return;
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/*
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* determine the page to load from the address
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*/
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ch = (unsigned long) dest / SRAM_PAGESIZE;
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pr_debug("%s: loaded page %d\n", sc_adapter[card]->devicename,ch);
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/*
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* Block interrupts and load the page
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*/
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spin_lock_irqsave(&sc_adapter[card]->lock, flags);
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outb(((sc_adapter[card]->shmem_magic + ch * SRAM_PAGESIZE) >> 14) | 0x80,
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sc_adapter[card]->ioport[sc_adapter[card]->shmem_pgport]);
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memcpy_toio((void __iomem *)(sc_adapter[card]->rambase + dest_rem), src, n);
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spin_unlock_irqrestore(&sc_adapter[card]->lock, flags);
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pr_debug("%s: set page to %#x\n",sc_adapter[card]->devicename,
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((sc_adapter[card]->shmem_magic + ch * SRAM_PAGESIZE)>>14)|0x80);
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pr_debug("%s: copying %zu bytes from %#lx to %#lx\n",
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sc_adapter[card]->devicename, n,
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(unsigned long) src,
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sc_adapter[card]->rambase + ((unsigned long) dest %0x4000));
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}
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/*
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* Reverse of above
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*/
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void memcpy_fromshmem(int card, void *dest, const void *src, size_t n)
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{
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unsigned long flags;
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unsigned char ch;
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if(!IS_VALID_CARD(card)) {
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pr_debug("Invalid param: %d is not a valid card id\n", card);
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return;
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}
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if(n > SRAM_PAGESIZE) {
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return;
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}
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/*
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* determine the page to load from the address
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*/
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ch = (unsigned long) src / SRAM_PAGESIZE;
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pr_debug("%s: loaded page %d\n", sc_adapter[card]->devicename,ch);
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/*
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* Block interrupts and load the page
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*/
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spin_lock_irqsave(&sc_adapter[card]->lock, flags);
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outb(((sc_adapter[card]->shmem_magic + ch * SRAM_PAGESIZE) >> 14) | 0x80,
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sc_adapter[card]->ioport[sc_adapter[card]->shmem_pgport]);
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memcpy_fromio(dest,(void *)(sc_adapter[card]->rambase +
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((unsigned long) src % 0x4000)), n);
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spin_unlock_irqrestore(&sc_adapter[card]->lock, flags);
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pr_debug("%s: set page to %#x\n",sc_adapter[card]->devicename,
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((sc_adapter[card]->shmem_magic + ch * SRAM_PAGESIZE)>>14)|0x80);
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/* pr_debug("%s: copying %d bytes from %#x to %#x\n",
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sc_adapter[card]->devicename, n,
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sc_adapter[card]->rambase + ((unsigned long) src %0x4000), (unsigned long) dest); */
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}
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#if 0
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void memset_shmem(int card, void *dest, int c, size_t n)
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{
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unsigned long flags;
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unsigned char ch;
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if(!IS_VALID_CARD(card)) {
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pr_debug("Invalid param: %d is not a valid card id\n", card);
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return;
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}
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if(n > SRAM_PAGESIZE) {
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return;
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}
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/*
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* determine the page to load from the address
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*/
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ch = (unsigned long) dest / SRAM_PAGESIZE;
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pr_debug("%s: loaded page %d\n",sc_adapter[card]->devicename,ch);
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/*
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* Block interrupts and load the page
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*/
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spin_lock_irqsave(&sc_adapter[card]->lock, flags);
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outb(((sc_adapter[card]->shmem_magic + ch * SRAM_PAGESIZE) >> 14) | 0x80,
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sc_adapter[card]->ioport[sc_adapter[card]->shmem_pgport]);
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memset_io(sc_adapter[card]->rambase +
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((unsigned long) dest % 0x4000), c, n);
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pr_debug("%s: set page to %#x\n",sc_adapter[card]->devicename,
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((sc_adapter[card]->shmem_magic + ch * SRAM_PAGESIZE)>>14)|0x80);
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spin_unlock_irqrestore(&sc_adapter[card]->lock, flags);
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}
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#endif /* 0 */
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