/* * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. * * @APPLE_LICENSE_HEADER_START@ * * The contents of this file constitute Original Code as defined in and * are subject to the Apple Public Source License Version 1.1 (the * "License"). You may not use this file except in compliance with the * License. Please obtain a copy of the License at * http://www.apple.com/publicsource and read it before using this file. * * This Original Code and all software distributed under the License are * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the * License for the specific language governing rights and limitations * under the License. * * @APPLE_LICENSE_HEADER_END@ */ #include #include #include #include /* pe_identify_machine: * * Sets up platform parameters. * Returns: nothing */ void pe_identify_machine(void) { DTEntry cpu, root; unsigned long *value; int size; // Clear the gPEClockFrequencyInfo struct bzero((void *)&gPEClockFrequencyInfo, sizeof(clock_frequency_info_t)); // Start with default values. gPEClockFrequencyInfo.timebase_frequency_hz = 25000000; gPEClockFrequencyInfo.bus_clock_rate_hz = 100000000; gPEClockFrequencyInfo.cpu_clock_rate_hz = 300000000; // Try to get the values from the device tree. if (DTFindEntry("device_type", "cpu", &cpu) == kSuccess) { // Find the time base frequency first. if (DTGetProperty(cpu, "timebase-frequency", (void **)&value, &size) == kSuccess) { // timebase_frequency_hz is only 32 bits, and the device tree should never provide 64 bits // so this if should never be taken. if (size == 8) gPEClockFrequencyInfo.timebase_frequency_hz = *(unsigned long long *)value; else gPEClockFrequencyInfo.timebase_frequency_hz = *value; } gPEClockFrequencyInfo.dec_clock_rate_hz = gPEClockFrequencyInfo.timebase_frequency_hz; // Find the bus frequency next. Try the cpu node, then the root. if (DTGetProperty(cpu, "bus-frequency", (void **)&value, &size) == kSuccess) { if (size == 8) gPEClockFrequencyInfo.bus_frequency_hz = *(unsigned long long *)value; else gPEClockFrequencyInfo.bus_frequency_hz = *value; } else { if (DTLookupEntry(0, "/", &root) == kSuccess) { if (DTGetProperty(root, "clock-frequency", (void **)&value, &size) == kSuccess) { if (size == 8) gPEClockFrequencyInfo.bus_frequency_hz = *(unsigned long long *)value; else gPEClockFrequencyInfo.bus_frequency_hz = *value; } } } gPEClockFrequencyInfo.bus_frequency_min_hz = gPEClockFrequencyInfo.bus_frequency_hz; gPEClockFrequencyInfo.bus_frequency_max_hz = gPEClockFrequencyInfo.bus_frequency_hz; if (gPEClockFrequencyInfo.bus_frequency_hz < 0x100000000ULL) gPEClockFrequencyInfo.bus_clock_rate_hz = gPEClockFrequencyInfo.bus_frequency_hz; else gPEClockFrequencyInfo.bus_clock_rate_hz = 0xFFFFFFFF; // Find the cpu frequency last. if (DTGetProperty(cpu, "clock-frequency", (void **)&value, &size) == kSuccess) { if (size == 8) gPEClockFrequencyInfo.cpu_frequency_hz = *(unsigned long long *)value; else gPEClockFrequencyInfo.cpu_frequency_hz = *value; } gPEClockFrequencyInfo.cpu_frequency_min_hz = gPEClockFrequencyInfo.cpu_frequency_hz; gPEClockFrequencyInfo.cpu_frequency_max_hz = gPEClockFrequencyInfo.cpu_frequency_hz; if (gPEClockFrequencyInfo.cpu_frequency_hz < 0x100000000ULL) gPEClockFrequencyInfo.cpu_clock_rate_hz = gPEClockFrequencyInfo.cpu_frequency_hz; else gPEClockFrequencyInfo.cpu_clock_rate_hz = 0xFFFFFFFF; } // Set the num / den pairs form the hz values. gPEClockFrequencyInfo.timebase_frequency_num = gPEClockFrequencyInfo.timebase_frequency_hz; gPEClockFrequencyInfo.timebase_frequency_den = 1; gPEClockFrequencyInfo.bus_clock_rate_num = gPEClockFrequencyInfo.bus_clock_rate_hz; gPEClockFrequencyInfo.bus_clock_rate_den = 1; gPEClockFrequencyInfo.bus_to_cpu_rate_num = (2 * gPEClockFrequencyInfo.cpu_clock_rate_hz) / gPEClockFrequencyInfo.bus_clock_rate_hz; gPEClockFrequencyInfo.bus_to_cpu_rate_den = 2; gPEClockFrequencyInfo.bus_to_dec_rate_num = 1; gPEClockFrequencyInfo.bus_to_dec_rate_den = gPEClockFrequencyInfo.bus_clock_rate_hz / gPEClockFrequencyInfo.dec_clock_rate_hz; } /* get_io_base_addr(): * * Get the base address of the io controller. */ vm_offset_t get_io_base_addr(void) { DTEntry entryP; vm_offset_t *address; int size; if ((DTFindEntry("device_type", "dbdma", &entryP) == kSuccess) || (DTFindEntry("device_type", "mac-io", &entryP) == kSuccess)) { if (DTGetProperty(entryP, "AAPL,address", (void **)&address, &size) == kSuccess) return *address; if (DTGetProperty(entryP, "assigned-addresses", (void **)&address, &size) == kSuccess) // address calculation not correct return *(address+2); } panic("Can't find this machine's io base address\n"); return 0; } vm_offset_t PE_find_scc(void) { vm_offset_t io, sccadd; DTEntry entryP; vm_offset_t *sccregs; unsigned int sccrsize; if(!(io = get_io_base_addr())) { /* Get the I/O controller base address */ return (vm_offset_t)0; /* Hmmm, no I/O??? What gives??? How'd we even boot? */ } /* Note: if we find a escc-legacy, we need to kind of hack because it can be either an offset into the iobase or the actual address itself. ORint the two should provide the correct for either */ sccadd = 0; /* Assume none for now */ if(DTFindEntry("name", "escc-legacy", &entryP) == kSuccess) { /* Find the old fashioned serial port */ if (DTGetProperty(entryP, "reg", (void **)&sccregs, &sccrsize) == kSuccess) { /* Do we have some registers? */ sccadd = ((vm_offset_t)*sccregs | io); /* Get the address */ } } if(DTFindEntry("name", "escc", &entryP) == kSuccess) { /* Well, see if we just have the new fangled one */ sccadd = io + 0x12000; /* Yeah, but still return the oldie goldie... */ } return sccadd; /* Return it if you found it */ } unsigned int PE_init_taproot(vm_offset_t *taddr) { DTEntry entryP; vm_offset_t *tappdata; unsigned int tappsize; if(DTFindEntry("name", "memory-map", &entryP) != kSuccess) return 0; /* no memory map */ if (DTGetProperty(entryP, "TapRoot", (void **)&tappdata, &tappsize) != kSuccess) return 0; /* No TapRoot */ tappdata[1] = (tappdata[1] + 4095 ) & -4096; /* Make sure this is a whole page */ *taddr = io_map_spec(tappdata[0], tappdata[1]); /* Map it in and return the address */ tappdata[0] = *taddr; /* Also change property */ return tappdata[1]; /* And the size */ }