// SPDX-License-Identifier: GPL-2.0-or-later/* * Functions for setting up and using a MPC106 northbridge * Extracted from arch/powerpc/platforms/powermac/pci.c. * * Copyright (C) 2003 Benjamin Herrenschmuidt (benh@kernel.crashing.org) * Copyright (C) 1997 Paul Mackerras (paulus@samba.org) */#include <linux/kernel.h>#include <linux/pci.h>#include <linux/init.h>#include <linux/of.h> #include <asm/io.h>#include <asm/pci-bridge.h>#include <asm/grackle.h> #define GRACKLE_CFA(b, d, o)	(0x80 | ((b) << 8) | ((d) << 16) \				 | (((o) & ~3) << 24)) #define GRACKLE_PICR1_LOOPSNOOP		0x00000010 static inline void grackle_set_loop_snoop(struct pci_controller *bp, int enable){	unsigned int val; 	out_be32(bp->cfg_addr, GRACKLE_CFA(0, 0, 0xa8));	val = in_le32(bp->cfg_data);	val = enable? (val | GRACKLE_PICR1_LOOPSNOOP) :		(val & ~GRACKLE_PICR1_LOOPSNOOP);	out_be32(bp->cfg_addr, GRACKLE_CFA(0, 0, 0xa8));	out_le32(bp->cfg_data, val);	(void)in_le32(bp->cfg_data);} void __init setup_grackle(struct pci_controller *hose){	setup_indirect_pci(hose, 0xfec00000, 0xfee00000, 0);	if (of_machine_is_compatible("PowerMac1,1"))		pci_add_flags(PCI_REASSIGN_ALL_BUS);	if (of_machine_is_compatible("AAPL,PowerBook1998"))		grackle_set_loop_snoop(hose, 1);}