diff options
Diffstat (limited to 'kernel/drivers/isdn/sc/shmem.c')
| -rw-r--r-- | kernel/drivers/isdn/sc/shmem.c | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/kernel/drivers/isdn/sc/shmem.c b/kernel/drivers/isdn/sc/shmem.c new file mode 100644 index 000000000..d24506ceb --- /dev/null +++ b/kernel/drivers/isdn/sc/shmem.c @@ -0,0 +1,138 @@ +/* $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 */ |