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Annotation of qemu/hw/mac_dbdma.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * PowerMac descriptor-based DMA emulation
        !             3:  *
        !             4:  * Copyright (c) 2005-2007 Fabrice Bellard
        !             5:  * Copyright (c) 2007 Jocelyn Mayer
        !             6:  *
        !             7:  * Permission is hereby granted, free of charge, to any person obtaining a copy
        !             8:  * of this software and associated documentation files (the "Software"), to deal
        !             9:  * in the Software without restriction, including without limitation the rights
        !            10:  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
        !            11:  * copies of the Software, and to permit persons to whom the Software is
        !            12:  * furnished to do so, subject to the following conditions:
        !            13:  *
        !            14:  * The above copyright notice and this permission notice shall be included in
        !            15:  * all copies or substantial portions of the Software.
        !            16:  *
        !            17:  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
        !            18:  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
        !            19:  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
        !            20:  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
        !            21:  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
        !            22:  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
        !            23:  * THE SOFTWARE.
        !            24:  */
        !            25: #include "hw.h"
        !            26: #include "ppc_mac.h"
        !            27: 
        !            28: /* DBDMA: currently no op - should suffice right now */
        !            29: 
        !            30: static void dbdma_writeb (void *opaque,
        !            31:                           target_phys_addr_t addr, uint32_t value)
        !            32: {
        !            33:     printf("%s: 0x" PADDRX " <= 0x%08x\n", __func__, addr, value);
        !            34: }
        !            35: 
        !            36: static void dbdma_writew (void *opaque,
        !            37:                           target_phys_addr_t addr, uint32_t value)
        !            38: {
        !            39: }
        !            40: 
        !            41: static void dbdma_writel (void *opaque,
        !            42:                           target_phys_addr_t addr, uint32_t value)
        !            43: {
        !            44: }
        !            45: 
        !            46: static uint32_t dbdma_readb (void *opaque, target_phys_addr_t addr)
        !            47: {
        !            48:     printf("%s: 0x" PADDRX " => 0x00000000\n", __func__, addr);
        !            49: 
        !            50:     return 0;
        !            51: }
        !            52: 
        !            53: static uint32_t dbdma_readw (void *opaque, target_phys_addr_t addr)
        !            54: {
        !            55:     return 0;
        !            56: }
        !            57: 
        !            58: static uint32_t dbdma_readl (void *opaque, target_phys_addr_t addr)
        !            59: {
        !            60:     return 0;
        !            61: }
        !            62: 
        !            63: static CPUWriteMemoryFunc *dbdma_write[] = {
        !            64:     &dbdma_writeb,
        !            65:     &dbdma_writew,
        !            66:     &dbdma_writel,
        !            67: };
        !            68: 
        !            69: static CPUReadMemoryFunc *dbdma_read[] = {
        !            70:     &dbdma_readb,
        !            71:     &dbdma_readw,
        !            72:     &dbdma_readl,
        !            73: };
        !            74: 
        !            75: void dbdma_init (int *dbdma_mem_index)
        !            76: {
        !            77:     *dbdma_mem_index = cpu_register_io_memory(0, dbdma_read, dbdma_write, NULL);
        !            78: }
        !            79: 

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