indirect_pci.c
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:2k
- /*
- * BK Id: %F% %I% %G% %U% %#%
- */
- /*
- * Support for indirect PCI bridges.
- *
- * Copyright (C) 1998 Gabriel Paubert.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
- #include <linux/kernel.h>
- #include <linux/pci.h>
- #include <linux/delay.h>
- #include <linux/string.h>
- #include <linux/init.h>
- #include <linux/bootmem.h>
- #include <asm/io.h>
- #include <asm/prom.h>
- #include <asm/pci-bridge.h>
- #include <asm/machdep.h>
- #define cfg_read(val, addr, type, op) *val = op((type)(addr))
- #define cfg_write(val, addr, type, op) op((type *)(addr), (val))
- #define INDIRECT_PCI_OP(rw, size, type, op, mask)
- static int
- indirect_##rw##_config_##size(struct pci_dev *dev, int offset, type val)
- {
- struct pci_controller *hose = dev->sysdata;
-
- out_be32(hose->cfg_addr,
- ((offset & 0xfc) << 24) | (dev->devfn << 16)
- | (dev->bus->number << 8) | 0x80);
- cfg_##rw(val, hose->cfg_data + (offset & mask), type, op);
- return PCIBIOS_SUCCESSFUL;
- }
- INDIRECT_PCI_OP(read, byte, u8 *, in_8, 3)
- INDIRECT_PCI_OP(read, word, u16 *, in_le16, 2)
- INDIRECT_PCI_OP(read, dword, u32 *, in_le32, 0)
- INDIRECT_PCI_OP(write, byte, u8, out_8, 3)
- INDIRECT_PCI_OP(write, word, u16, out_le16, 2)
- INDIRECT_PCI_OP(write, dword, u32, out_le32, 0)
- static struct pci_ops indirect_pci_ops =
- {
- indirect_read_config_byte,
- indirect_read_config_word,
- indirect_read_config_dword,
- indirect_write_config_byte,
- indirect_write_config_word,
- indirect_write_config_dword
- };
- void __init
- setup_indirect_pci(struct pci_controller* hose, u32 cfg_addr, u32 cfg_data)
- {
- hose->ops = &indirect_pci_ops;
- hose->cfg_addr = (unsigned int *) ioremap(cfg_addr, 4);
- hose->cfg_data = (unsigned char *) ioremap(cfg_data, 4);
- }