EMILE/second/arch.c

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/*
*
* (c) 2004 Laurent Vivier <LaurentVivier@wanadoo.fr>
*
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* some parts from BootX, (c) Benjamin Herrenschmidt
*
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*/
#include "misc.h"
#include "glue.h"
#include "arch.h"
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#include "lowmem.h"
unsigned long cpu_type;
unsigned long mmu_type;
unsigned long fpu_type;
unsigned long machine_id;
unsigned long arch_type;
unsigned long bus_type;
void arch_init()
{
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/* System prior to 6.0.4 doesn't support Gestalt() */
if (ROMBase[4] == 0x0178) {
/* Macintosh SE/30 */
/* Doesn't support Gestalt(), nor SysEnvirons() (why ?) */
/* http://docs.info.apple.com/article.html?artnum=112170 */
cpu_type = gestalt68030;
mmu_type = gestalt68030MMU;
fpu_type = gestalt68882;
machine_id = gestaltMacSE030;
arch_type = gestalt68k;
bus_type = busNUBUS;
return;
}
/* get processor type */
Gestalt(gestaltProcessorType, &cpu_type);
/* check FPU */
if (Gestalt('FPUE', &fpu_type) == noErr)
fpu_type = 0;
else
Gestalt(gestaltFPUType, &fpu_type);
/* check MMU */
Gestalt(gestaltMMUType, &mmu_type);
/* I'v got a 'noMMU' with my 68030, not cool... */
if (mmu_type == gestaltNoMMU)
{
switch(cpu_type)
{
case gestalt68030:
mmu_type = gestalt68030MMU;
break;
case gestalt68040:
mmu_type = gestalt68040MMU;
break;
}
}
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/* get architecture type: powerPC or m68k */
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if (Gestalt(gestaltSysArchitecture, &arch_type) != noErr)
arch_type = gestalt68k;
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/* check machine type */
Gestalt(gestaltMachineType, &machine_id);
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/* check bus type */
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if (arch_type == gestalt68k)
{
bus_type = busNUBUS;
}
else
{
unsigned long response;
/* OpenFirmware implies PCI */
if ( (Gestalt('opfw', &response) == noErr) &&
(Gestalt('nreg', &response) == noErr) )
bus_type = busPCI;
else
bus_type = busNUBUS;
switch(machine_id)
{
case gestaltPowerMac6100_60:
case gestaltPowerMac6100_66:
case gestaltPowerMac6100_80:
case gestaltPowerMac7100_66:
case gestaltPowerMac7100_80:
case gestaltPowerMac7100_80_chipped:
case gestaltPowerMac8100_80:
case gestaltPowerMac8100_100:
case gestaltPowerMac8100_110:
case gestaltPowerMac8100_120:
case gestaltAWS9150_80:
case gestaltAWS9150_120:
bus_type |= busPDM;
break;
case gestaltPowerMac5200:
case gestaltPowerMac6200:
bus_type |= busPERFORMA;
break;
case gestaltPowerBook1400:
case gestaltPowerBook5300:
case gestaltPowerBookDuo2300:
bus_type |= busPOWERBOOK;
break;
}
}
}