2 * Support for indirect PCI bridges.
4 * Copyright (C) 1998 Gabriel Paubert.
6 * SPDX-License-Identifier: GPL-2.0+
11 #if !defined(__I386__)
13 #include <asm/processor.h>
17 #define cfg_read(val, addr, type, op) *val = op((type)(addr))
18 #define cfg_write(val, addr, type, op) op((type *)(addr), (val))
20 #if defined(CONFIG_E500) || defined(CONFIG_MPC86xx)
21 #define INDIRECT_PCI_OP(rw, size, type, op, mask) \
23 indirect_##rw##_config_##size(struct pci_controller *hose, \
24 pci_dev_t dev, int offset, type val) \
27 b = PCI_BUS(dev); d = PCI_DEV(dev); f = PCI_FUNC(dev); \
28 b = b - hose->first_busno; \
29 dev = PCI_BDF(b, d, f); \
30 *(hose->cfg_addr) = dev | (offset & 0xfc) | ((offset & 0xf00) << 16) | 0x80000000; \
32 cfg_##rw(val, hose->cfg_data + (offset & mask), type, op); \
36 #define INDIRECT_PCI_OP(rw, size, type, op, mask) \
38 indirect_##rw##_config_##size(struct pci_controller *hose, \
39 pci_dev_t dev, int offset, type val) \
42 b = PCI_BUS(dev); d = PCI_DEV(dev); f = PCI_FUNC(dev); \
43 b = b - hose->first_busno; \
44 dev = PCI_BDF(b, d, f); \
45 out_le32(hose->cfg_addr, dev | (offset & 0xfc) | 0x80000000); \
46 cfg_##rw(val, hose->cfg_data + (offset & mask), type, op); \
51 INDIRECT_PCI_OP(read, byte, u8 *, in_8, 3)
52 INDIRECT_PCI_OP(read, word, u16 *, in_le16, 2)
53 INDIRECT_PCI_OP(read, dword, u32 *, in_le32, 0)
54 INDIRECT_PCI_OP(write, byte, u8, out_8, 3)
55 INDIRECT_PCI_OP(write, word, u16, out_le16, 2)
56 INDIRECT_PCI_OP(write, dword, u32, out_le32, 0)
58 void pci_setup_indirect(struct pci_controller* hose, u32 cfg_addr, u32 cfg_data)
61 indirect_read_config_byte,
62 indirect_read_config_word,
63 indirect_read_config_dword,
64 indirect_write_config_byte,
65 indirect_write_config_word,
66 indirect_write_config_dword);
68 hose->cfg_addr = (unsigned int *) cfg_addr;
69 hose->cfg_data = (unsigned char *) cfg_data;
72 #endif /* !__I386__ */