2 * Support for indirect PCI bridges.
4 * Copyright (C) 1998 Gabriel Paubert.
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
17 #include <asm/processor.h>
21 #define cfg_read(val, addr, type, op) *val = op((type)(addr))
22 #define cfg_write(val, addr, type, op) op((type *)(addr), (val))
24 #define INDIRECT_PCI_OP(rw, size, type, op, mask) \
26 indirect_##rw##_config_##size(struct pci_controller *hose, \
27 pci_dev_t dev, int offset, type val) \
29 out_le32(hose->cfg_addr, dev | (offset & 0xfc) | 0x80000000); \
30 cfg_##rw(val, hose->cfg_data + (offset & mask), type, op); \
34 #define INDIRECT_PCI_OP_ERRATA6(rw, size, type, op, mask) \
36 indirect_##rw##_config_##size(struct pci_controller *hose, \
37 pci_dev_t dev, int offset, type val) \
39 unsigned int msr = mfmsr(); \
40 mtmsr(msr & ~(MSR_EE | MSR_CE)); \
41 out_le32(hose->cfg_addr, dev | (offset & 0xfc) | 0x80000000); \
42 cfg_##rw(val, hose->cfg_data + (offset & mask), type, op); \
43 out_le32(hose->cfg_addr, 0x00000000); \
48 INDIRECT_PCI_OP(read, byte, u8 *, in_8, 3)
49 INDIRECT_PCI_OP(read, word, u16 *, in_le16, 2)
50 INDIRECT_PCI_OP(read, dword, u32 *, in_le32, 0)
52 INDIRECT_PCI_OP_ERRATA6(write, byte, u8, out_8, 3)
53 INDIRECT_PCI_OP_ERRATA6(write, word, u16, out_le16, 2)
54 INDIRECT_PCI_OP_ERRATA6(write, dword, u32, out_le32, 0)
56 INDIRECT_PCI_OP(write, byte, u8, out_8, 3)
57 INDIRECT_PCI_OP(write, word, u16, out_le16, 2)
58 INDIRECT_PCI_OP(write, dword, u32, out_le32, 0)
61 void pci_setup_indirect(struct pci_controller* hose, u32 cfg_addr, u32 cfg_data)
64 indirect_read_config_byte,
65 indirect_read_config_word,
66 indirect_read_config_dword,
67 indirect_write_config_byte,
68 indirect_write_config_word,
69 indirect_write_config_dword);
71 hose->cfg_addr = (unsigned int *) cfg_addr;
72 hose->cfg_data = (unsigned char *) cfg_data;