From 763169e4cecafb9d774adfc558926cc20ba11bf8 Mon Sep 17 00:00:00 2001 From: soda Date: Sun, 23 Jan 2000 20:08:08 +0000 Subject: [PATCH] Moved to /cvsroot/syssrc/sys/arch/arc/dev/dma.c,v --- sys/arch/pica/dev/dma.c | 409 ---------------------------------------- 1 file changed, 409 deletions(-) delete mode 100644 sys/arch/pica/dev/dma.c diff --git a/sys/arch/pica/dev/dma.c b/sys/arch/pica/dev/dma.c deleted file mode 100644 index ed0090d17784..000000000000 --- a/sys/arch/pica/dev/dma.c +++ /dev/null @@ -1,409 +0,0 @@ -/* $NetBSD: dma.c,v 1.9 1997/08/27 11:24:09 bouyer Exp $ */ - -/* - * Copyright (c) 1992, 1993 - * The Regents of the University of California. All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * This product includes software developed by the University of - * California, Berkeley and its contributors. - * 4. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * from: @(#)rz.c 8.1 (Berkeley) 7/29/93 - */ - -/* - * PICA system dma driver. Handles resource allocation and - * logical (viritual) address remaping. - */ - -#include -#include -#include -#include -#include -#include -#include - -#include -#include -#include - -#include -#include -#include -#include -#include - -#include -#include -#include - -#include -#include - - -extern vm_map_t phys_map; - -#define dma_pte_to_pa(x) (((x) - first_dma_pte) * PICA_DMA_PAGE_SIZE) - -dma_pte_t *free_dma_pte; /* Pointer to free dma pte list */ -dma_pte_t *first_dma_pte; /* Pointer to first dma pte */ - -/* - * Initialize the dma mapping register area and pool. - */ -void -picaDmaInit() -{ - int map = PICA_TL_BASE; - - MachFlushCache(); /* Make shure no map entries are cached */ - - bzero((char *)map, PICA_TL_SIZE); - free_dma_pte = (dma_pte_t *)map; - first_dma_pte = (dma_pte_t *)map; - free_dma_pte->queue.next = NULL; - free_dma_pte->queue.size = PICA_TL_SIZE / sizeof(dma_pte_t); - - out32(PICA_SYS_TL_BASE, MIPS_KSEG1_TO_PHYS(map)); - out32(PICA_SYS_TL_LIMIT, PICA_TL_SIZE); - out32(PICA_SYS_TL_IVALID, 0); -} - -/* - * Allocate an array of 'size' dma pte entrys. - * Return address to first pte. - */ -void -picaDmaTLBAlloc(dma_softc_t *dma) -{ - dma_pte_t *list; - dma_pte_t *found; - int size; - int s; - - found = NULL; - size = dma->pte_size; - do { - list = (dma_pte_t *)&free_dma_pte; - s = splhigh(); - while(list) { - if(list->queue.next->queue.size >= size) { - found = list->queue.next; - break; - } - } -/*XXX Wait for release wakeup */ - } while(found == NULL); - if(found->queue.size == size) { - list->queue.next = found->queue.next; - } - else { - list->queue.next = found + size; - list = found + size; - list->queue.next = found->queue.next; - list->queue.size = found->queue.size - size; - } - splx(s); - dma->pte_base = found; - dma->dma_va = dma_pte_to_pa(found); -} - -/* - * Free an array of dma pte entrys. - */ -void -picaDmaTLBFree(dma_softc_t *dma) -{ - dma_pte_t *list; - dma_pte_t *entry; - int size; - int s; - - s = splhigh(); - entry = dma->pte_base; - size = dma->pte_size; - entry->queue.next = NULL; - entry->queue.size = size; - if(free_dma_pte == NULL || entry < free_dma_pte) { - list = entry; - list->queue.next = free_dma_pte; - free_dma_pte = entry; - } - else { - list = free_dma_pte; - while(list < entry && list->queue.next != NULL) { - if(list + list->queue.size == entry) { - list->queue.size += size; - break; - } - else if(list->queue.next == NULL) { - list->queue.next = entry; - break; - } - else - list = list->queue.next; - } - } - if(list->queue.next != NULL) { - if(list + list->queue.size == list->queue.next) { - list->queue.size += list->queue.next->queue.size; - list->queue.next = list->queue.next->queue.next; - } - } - splx(s); -/*XXX Wakeup waiting */ -} - -/* - * Map up a viritual address space in dma space given by - * the dma control structure and invalidate dma TLB cache. - */ - -void -picaDmaTLBMap(dma_softc_t *sc) -{ - vm_offset_t pa; - vm_offset_t va; - dma_pte_t *dma_pte; - int nbytes; - - va = sc->next_va - sc->dma_va; - dma_pte = sc->pte_base + (va / PICA_DMA_PAGE_SIZE); - nbytes = dma_page_round(sc->next_size + dma_page_offs(va)); - va = sc->req_va; - while(nbytes > 0) { - if(va < VM_MIN_KERNEL_ADDRESS) { - pa = MIPS_KSEG0_TO_PHYS(va); - } - else { - pa = pmap_extract(vm_map_pmap(phys_map), va); - } - pa &= PICA_DMA_PAGE_NUM; - if(pa == 0) - panic("picaDmaTLBMap: null page frame"); - dma_pte->entry.lo_addr = pa; - dma_pte->entry.hi_addr = 0; - dma_pte++; - va += PICA_DMA_PAGE_SIZE; - nbytes -= PICA_DMA_PAGE_SIZE; - } -} - -/* - * Start local dma channel. - */ -void -picaDmaStart(sc, addr, size, datain) - struct dma_softc *sc; - char *addr; - size_t size; - int datain; -{ - pDmaReg regs = sc->dma_reg; - - /* Halt DMA */ - regs->dma_enab = 0; - regs->dma_mode = 0; - - /* Remap request space va into dma space va */ - - sc->req_va = (int)addr; - sc->next_va = sc->dma_va + dma_page_offs(addr); - sc->next_size = size; - - /* Map up the request viritual dma space */ - picaDmaTLBMap(sc); - out32(PICA_SYS_TL_IVALID, 0); /* Flush dma map cache */ - - /* Load new transfer parameters */ - regs->dma_addr = sc->next_va; - regs->dma_count = sc->next_size; - regs->dma_mode = sc->mode & PICA_DMA_MODE; - - sc->sc_active = 1; - if(datain == DMA_FROM_DEV) { - sc->mode &= ~DMA_DIR_WRITE; - regs->dma_enab = PICA_DMA_ENAB_RUN | PICA_DMA_ENAB_READ; - } - else { - sc->mode |= DMA_DIR_WRITE; - regs->dma_enab = PICA_DMA_ENAB_RUN | PICA_DMA_ENAB_WRITE; - } - wbflush(); -} - -/* - * Set up DMA mapper for external dma. - * Used by ISA dma and SONIC - */ -void -picaDmaMap(sc, addr, size, offset) - struct dma_softc *sc; - char *addr; - size_t size; - int offset; -{ - /* Remap request space va into dma space va */ - - sc->req_va = (int)addr; - sc->next_va = sc->dma_va + dma_page_offs(addr) + offset; - sc->next_size = size; - - /* Map up the request viritual dma space */ - picaDmaTLBMap(sc); -} - -/* - * Prepare for new dma by flushing - */ -void -picaDmaFlush(sc, addr, size, datain) - struct dma_softc *sc; - char *addr; - size_t size; - int datain; -{ - out32(PICA_SYS_TL_IVALID, 0); /* Flush dma map cache */ -} - -/* - * Stop/Reset a DMA channel - */ -void -picaDmaReset(dma_softc_t *sc) -{ - pDmaReg regs = sc->dma_reg; - - /* Halt DMA */ - regs->dma_enab = 0; - regs->dma_mode = 0; - sc->sc_active = 0; -} - -/* - * End dma operation, return byte count left. - */ -int -picaDmaEnd(dma_softc_t *sc) -{ - pDmaReg regs = sc->dma_reg; - int res; - - res = regs->dma_count = sc->next_size; - - /* Halt DMA */ - regs->dma_enab = 0; - regs->dma_mode = 0; - sc->sc_active = 0; - - return res; -} - -/* - * Null call rathole! - */ -int /* XXX*/ -picaDmaNull(dma_softc_t *sc) -{ - pDmaReg regs = sc->dma_reg; - - printf("picaDmaNull called\n"); -} - -/* - * Null enable-interrupt rathole! - */ -void /* XXX*/ -picaEnIntrNull(dma_softc_t *sc) -{ - pDmaReg regs = sc->dma_reg; - - printf("picaEnIntrNull called\n"); -} - - -/* - * dma_init.. - * Called from asc to set up dma - */ -void -asc_dma_init(dma_softc_t *sc) -{ - sc->reset = picaDmaReset; - sc->enintr = picaEnIntrNull; - sc->start = picaDmaStart; - sc->map = picaDmaMap; - sc->isintr = picaDmaNull; - sc->intr = picaDmaNull; - sc->end = picaDmaEnd; - - sc->dma_reg = (pDmaReg)PICA_SYS_DMA0_REGS; - sc->pte_size = 32; - sc->mode = PICA_DMA_MODE_160NS | PICA_DMA_MODE_16; - picaDmaTLBAlloc(sc); -} -/* - * dma_init.. - * Called from fdc to set up dma - */ -void -fdc_dma_init(dma_softc_t *sc) -{ - sc->reset = picaDmaReset; - sc->enintr = picaEnIntrNull; - sc->start = picaDmaStart; - sc->map = picaDmaMap; - sc->isintr = picaDmaNull; - sc->intr = picaDmaNull; - sc->end = picaDmaEnd; - - sc->dma_reg = (pDmaReg)PICA_SYS_DMA1_REGS; - sc->pte_size = 32; - sc->mode = PICA_DMA_MODE_160NS | PICA_DMA_MODE_8; - picaDmaTLBAlloc(sc); -} -/* - * dma_init.. - * Called from sonic to set up dma - */ -void -sn_dma_init(dma_softc_t *sc, int pages) -{ - sc->reset = picaEnIntrNull; /* XXX*/ - sc->enintr = picaEnIntrNull; - sc->start = picaDmaFlush; - sc->map = picaDmaMap; - sc->isintr = picaDmaNull; - sc->intr = picaDmaNull; - sc->end = picaDmaNull; - - sc->dma_reg = (pDmaReg)NULL; - sc->pte_size = pages; - sc->mode = 0; - picaDmaTLBAlloc(sc); -}