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