// 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) (0 x80 | ((b) << 8 ) | ((d) << 16 ) \
| (((o) & ~3 ) << 24 ))
#define GRACKLE_PICR1_LOOPSNOOP 0 x00000010
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 , 0 xa8));
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 , 0 xa8));
out_le32(bp->cfg_data, val);
(void )in_le32(bp->cfg_data);
}
void __init setup_grackle(struct pci_controller *hose)
{
setup_indirect_pci(hose, 0 xfec00000, 0 xfee00000, 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 );
}
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