/*
* This file is subject to the terms and conditions of the GNU General Public
* License . See the file " COPYING " in the main directory of this archive
* for more details .
*
* Copyright ( C ) 2000 , 2001 Keith M Wesolowski
*/
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/types.h>
#include <asm /ip32/mace.h>
#if 0
# define DPRINTK(args...) printk(args);
#else
# define DPRINTK(args...)
#endif
/*
* O2 has up to 5 PCI devices connected into the MACE bridge . The device
* map looks like this :
*
* 0 aic7xxx 0
* 1 aic7xxx 1
* 2 expansion slot
* 3 N / C
* 4 N / C
*/
static inline int mkaddr(struct pci_bus *bus, unsigned int devfn,
unsigned int reg)
{
return ((bus->number & 0 xff) << 16 ) |
((devfn & 0 xff) << 8 ) |
(reg & 0 xfc);
}
static int
mace_pci_read_config(struct pci_bus *bus, unsigned int devfn,
int reg, int size, u32 *val)
{
u32 control = mace->pci.control;
/* disable master aborts interrupts during config read */
mace->pci.control = control & ~MACEPCI_CONTROL_MAR_INT;
mace->pci.config_addr = mkaddr(bus, devfn, reg);
switch (size) {
case 1 :
*val = mace->pci.config_data.b[(reg & 3 ) ^ 3 ];
break ;
case 2 :
*val = mace->pci.config_data.w[((reg >> 1 ) & 1 ) ^ 1 ];
break ;
case 4 :
*val = mace->pci.config_data.l;
break ;
}
/* ack possible master abort */
mace->pci.error &= ~MACEPCI_ERROR_MASTER_ABORT;
mace->pci.control = control;
/*
* someone forgot to set the ultra bit for the onboard
* scsi chips ; we fake it here
*/
if (bus->number == 0 && reg == 0 x40 && size == 4 &&
(devfn == (1 << 3 ) || devfn == (2 << 3 )))
*val |= 0 x1000;
DPRINTK("read%d: reg=%08x,val=%02x\n" , size * 8 , reg, *val);
return PCIBIOS_SUCCESSFUL;
}
static int
mace_pci_write_config(struct pci_bus *bus, unsigned int devfn,
int reg, int size, u32 val)
{
mace->pci.config_addr = mkaddr(bus, devfn, reg);
switch (size) {
case 1 :
mace->pci.config_data.b[(reg & 3 ) ^ 3 ] = val;
break ;
case 2 :
mace->pci.config_data.w[((reg >> 1 ) & 1 ) ^ 1 ] = val;
break ;
case 4 :
mace->pci.config_data.l = val;
break ;
}
DPRINTK("write%d: reg=%08x,val=%02x\n" , size * 8 , reg, val);
return PCIBIOS_SUCCESSFUL;
}
struct pci_ops mace_pci_ops = {
.read = mace_pci_read_config,
.write = mace_pci_write_config,
};
Messung V0.5 in Prozent C=95 H=99 G=96
¤ Dauer der Verarbeitung: 0.9 Sekunden
(vorverarbeitet am 2026-09-28)
¤
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