mirror of https://gitee.com/openkylin/qemu.git
122 lines
3.9 KiB
C
122 lines
3.9 KiB
C
/*
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* QEMU Common PCI Host bridge configuration data space access routines.
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*
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* Copyright (c) 2006 Fabrice Bellard
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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/* Worker routines for a PCI host controller that uses an {address,data}
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register pair to access PCI configuration space. */
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/* debug PCI */
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//#define DEBUG_PCI
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#include "sysbus.h"
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#ifdef DEBUG_PCI
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#define PCI_DPRINTF(fmt, ...) \
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do { printf("pci_host_data: " fmt , ## __VA_ARGS__); } while (0)
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#else
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#define PCI_DPRINTF(fmt, ...)
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#endif
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typedef struct {
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SysBusDevice busdev;
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uint32_t config_reg;
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PCIBus *bus;
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} PCIHostState;
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static void pci_host_data_writeb(void* opaque, pci_addr_t addr, uint32_t val)
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{
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PCIHostState *s = opaque;
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PCI_DPRINTF("writeb addr " TARGET_FMT_plx " val %x\n",
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(target_phys_addr_t)addr, val);
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if (s->config_reg & (1u << 31))
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pci_data_write(s->bus, s->config_reg | (addr & 3), val, 1);
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}
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static void pci_host_data_writew(void* opaque, pci_addr_t addr, uint32_t val)
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{
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PCIHostState *s = opaque;
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#ifdef TARGET_WORDS_BIGENDIAN
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val = bswap16(val);
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#endif
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PCI_DPRINTF("writew addr " TARGET_FMT_plx " val %x\n",
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(target_phys_addr_t)addr, val);
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if (s->config_reg & (1u << 31))
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pci_data_write(s->bus, s->config_reg | (addr & 3), val, 2);
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}
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static void pci_host_data_writel(void* opaque, pci_addr_t addr, uint32_t val)
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{
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PCIHostState *s = opaque;
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#ifdef TARGET_WORDS_BIGENDIAN
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val = bswap32(val);
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#endif
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PCI_DPRINTF("writel addr " TARGET_FMT_plx " val %x\n",
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(target_phys_addr_t)addr, val);
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if (s->config_reg & (1u << 31))
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pci_data_write(s->bus, s->config_reg, val, 4);
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}
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static uint32_t pci_host_data_readb(void* opaque, pci_addr_t addr)
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{
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PCIHostState *s = opaque;
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uint32_t val;
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if (!(s->config_reg & (1 << 31)))
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return 0xff;
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val = pci_data_read(s->bus, s->config_reg | (addr & 3), 1);
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PCI_DPRINTF("readb addr " TARGET_FMT_plx " val %x\n",
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(target_phys_addr_t)addr, val);
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return val;
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}
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static uint32_t pci_host_data_readw(void* opaque, pci_addr_t addr)
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{
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PCIHostState *s = opaque;
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uint32_t val;
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if (!(s->config_reg & (1 << 31)))
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return 0xffff;
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val = pci_data_read(s->bus, s->config_reg | (addr & 3), 2);
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PCI_DPRINTF("readw addr " TARGET_FMT_plx " val %x\n",
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(target_phys_addr_t)addr, val);
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#ifdef TARGET_WORDS_BIGENDIAN
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val = bswap16(val);
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#endif
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return val;
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}
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static uint32_t pci_host_data_readl(void* opaque, pci_addr_t addr)
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{
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PCIHostState *s = opaque;
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uint32_t val;
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if (!(s->config_reg & (1 << 31)))
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return 0xffffffff;
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val = pci_data_read(s->bus, s->config_reg | (addr & 3), 4);
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PCI_DPRINTF("readl addr " TARGET_FMT_plx " val %x\n",
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(target_phys_addr_t)addr, val);
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#ifdef TARGET_WORDS_BIGENDIAN
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val = bswap32(val);
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#endif
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return val;
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}
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