1 // SPDX-License-Identifier: GPL-2.0-or-later 1
2 /*
3 * Functions for setting up and using a MPC106
4 * Extracted from arch/powerpc/platforms/power
5 *
6 * Copyright (C) 2003 Benjamin Herrenschmuidt
7 * Copyright (C) 1997 Paul Mackerras (paulus@s
8 */
9 #include <linux/kernel.h>
10 #include <linux/pci.h>
11 #include <linux/init.h>
12 #include <linux/of.h>
13
14 #include <asm/io.h>
15 #include <asm/pci-bridge.h>
16 #include <asm/grackle.h>
17
18 #define GRACKLE_CFA(b, d, o) (0x80 | ((b) <
19 | (((o) & ~3)
20
21 #define GRACKLE_PICR1_LOOPSNOOP 0x0000
22
23 static inline void grackle_set_loop_snoop(stru
24 {
25 unsigned int val;
26
27 out_be32(bp->cfg_addr, GRACKLE_CFA(0,
28 val = in_le32(bp->cfg_data);
29 val = enable? (val | GRACKLE_PICR1_LOO
30 (val & ~GRACKLE_PICR1_LOOPSNOO
31 out_be32(bp->cfg_addr, GRACKLE_CFA(0,
32 out_le32(bp->cfg_data, val);
33 (void)in_le32(bp->cfg_data);
34 }
35
36 void __init setup_grackle(struct pci_controlle
37 {
38 setup_indirect_pci(hose, 0xfec00000, 0
39 if (of_machine_is_compatible("PowerMac
40 pci_add_flags(PCI_REASSIGN_ALL
41 if (of_machine_is_compatible("AAPL,Pow
42 grackle_set_loop_snoop(hose, 1
43 }
44
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