mirror of https://github.com/vivier/EMILE.git
173 lines
3.5 KiB
C
173 lines
3.5 KiB
C
/*
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*
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* (c) 2004 Laurent Vivier <Laurent@Vivier.EU>
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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 <sys/types.h>
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#include <macos/lowmem.h>
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#include <macos/gestalt.h>
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#include <macos/errors.h>
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#include "misc.h"
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#include "arch.h"
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#ifdef ARCH_PPC
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#include "bootx.h"
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#endif
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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 ram_size;
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unsigned long gmt_bias;
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#ifdef ARCH_PPC
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unsigned long bus_type;
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#endif
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struct older_macintosh_info {
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char *name;
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unsigned short ROMID;
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unsigned short SSW;
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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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};
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struct older_macintosh_info older_macintosh[] = {
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{ "Macintosh SE/30", 0x0178, 0x0603,
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gestalt68030, gestalt68030MMU, gestalt68882,
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gestaltMacSE030, gestalt68k },
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{ "Macintosh Classic", 0x0276, 0x0607,
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gestalt68000, gestaltNoMMU, gestaltNoFPU,
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gestaltClassic, gestalt68k },
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{ 0 }
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};
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void arch_init()
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{
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MachineLocation where;
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int i = 0;
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/* Some systems don't support Gestalt() */
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while (older_macintosh[i].name != 0 )
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{
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if (ROMBase[4] == older_macintosh[i].ROMID)
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{
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/* Doesn't support Gestalt(), nor SysEnvirons() */
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cpu_type = older_macintosh[i].cpu_type;
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mmu_type = older_macintosh[i].mmu_type;
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fpu_type = older_macintosh[i].fpu_type;
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machine_id = older_macintosh[i].machine_id;
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arch_type = older_macintosh[i].arch_type;
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ram_size = MemTop;
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return;
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}
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i++;
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}
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/* get RAM size */
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Gestalt('ram ', (long*)&ram_size);
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/* get processor type */
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Gestalt(gestaltProcessorType, (long*)&cpu_type);
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/* check FPU */
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if (Gestalt('FPUE', (long*)&fpu_type) == noErr)
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fpu_type = 0;
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else
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Gestalt(gestaltFPUType, (long*)&fpu_type);
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/* check MMU */
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Gestalt(gestaltMMUType, (long*)&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, (long*)&arch_type) != noErr)
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arch_type = gestalt68k;
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/* check machine type */
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Gestalt(gestaltMachineType, (long*)&machine_id);
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/* GMT bias */
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ReadLocation(&where);
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gmt_bias = where.u.gmtDelta & 0x00FFFFFF;
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if (gmt_bias & 0x00800000)
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gmt_bias |= 0xFF000000; /* sign-extend to 32 bits */
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gmt_bias = (long)gmt_bias / 60; /* convert to whole minutes, remember sign */
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#ifdef ARCH_PPC
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/* check bus type */
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if (arch_type == gestaltPowerPC)
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{
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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 = BOOT_ARCH_PCI;
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else
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bus_type = BOOT_ARCH_NUBUS;
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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 |= BOOT_ARCH_NUBUS_PDM;
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break;
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case gestaltPowerMac5200:
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case gestaltPowerMac6200:
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bus_type |= BOOT_ARCH_NUBUS_PERFORMA;
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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 |= BOOT_ARCH_NUBUS_POWERBOOK;
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break;
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}
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}
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#endif
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}
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