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.
16 #include <asm/processor.h>
20 #define cfg_read(val, addr, type, op) *val = op((type)(addr))
21 #define cfg_write(val, addr, type, op) op((type *)(addr), (val))
23 #define INDIRECT_PCI_OP(rw, size, type, op, mask) \
25 indirect_##rw##_config_##size(struct pci_controller *hose, \
26 pci_dev_t dev, int offset, type val) \
28 out_le32(hose->cfg_addr, dev | (offset & 0xfc) | 0x80000000); \
29 cfg_##rw(val, hose->cfg_data + (offset & mask), type, op); \
33 #define INDIRECT_PCI_OP_ERRATA6(rw, size, type, op, mask) \
35 indirect_##rw##_config_##size(struct pci_controller *hose, \
36 pci_dev_t dev, int offset, type val) \
38 unsigned int msr = mfmsr(); \
39 mtmsr(msr & ~(MSR_EE | MSR_CE)); \
40 out_le32(hose->cfg_addr, dev | (offset & 0xfc) | 0x80000000); \
41 cfg_##rw(val, hose->cfg_data + (offset & mask), type, op); \
42 out_le32(hose->cfg_addr, 0x00000000); \
47 INDIRECT_PCI_OP(read, byte, u8 *, in_8, 3)
48 INDIRECT_PCI_OP(read, word, u16 *, in_le16, 2)
49 INDIRECT_PCI_OP(read, dword, u32 *, in_le32, 0)
51 INDIRECT_PCI_OP_ERRATA6(write, byte, u8, out_8, 3)
52 INDIRECT_PCI_OP_ERRATA6(write, word, u16, out_le16, 2)
53 INDIRECT_PCI_OP_ERRATA6(write, dword, u32, out_le32, 0)
55 INDIRECT_PCI_OP(write, byte, u8, out_8, 3)
56 INDIRECT_PCI_OP(write, word, u16, out_le16, 2)
57 INDIRECT_PCI_OP(write, dword, u32, out_le32, 0)
60 void pci_setup_indirect(struct pci_controller* hose, u32 cfg_addr, u32 cfg_data)
63 indirect_read_config_byte,
64 indirect_read_config_word,
65 indirect_read_config_dword,
66 indirect_write_config_byte,
67 indirect_write_config_word,
68 indirect_write_config_dword);
70 hose->cfg_addr = (unsigned int *) cfg_addr;
71 hose->cfg_data = (unsigned char *) cfg_data;