/* $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(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 %d 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 */