1*228d5505STony Breeds /* 2*228d5505STony Breeds * Copyright © 2011 Tony Breeds IBM Corporation 3*228d5505STony Breeds * 4*228d5505STony Breeds * Based on earlier code: 5*228d5505STony Breeds * Copyright (C) Paul Mackerras 1997. 6*228d5505STony Breeds * 7*228d5505STony Breeds * Matt Porter <mporter@kernel.crashing.org> 8*228d5505STony Breeds * Copyright 2002-2005 MontaVista Software Inc. 9*228d5505STony Breeds * 10*228d5505STony Breeds * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net> 11*228d5505STony Breeds * Copyright (c) 2003, 2004 Zultys Technologies 12*228d5505STony Breeds * 13*228d5505STony Breeds * Copyright 2007 David Gibson, IBM Corporation. 14*228d5505STony Breeds * Copyright 2010 Ben. Herrenschmidt, IBM Corporation. 15*228d5505STony Breeds * Copyright © 2011 David Kleikamp IBM Corporation 16*228d5505STony Breeds * 17*228d5505STony Breeds * This program is free software; you can redistribute it and/or 18*228d5505STony Breeds * modify it under the terms of the GNU General Public License 19*228d5505STony Breeds * as published by the Free Software Foundation; either version 20*228d5505STony Breeds * 2 of the License, or (at your option) any later version. 21*228d5505STony Breeds */ 22*228d5505STony Breeds #include <stdarg.h> 23*228d5505STony Breeds #include <stddef.h> 24*228d5505STony Breeds #include "types.h" 25*228d5505STony Breeds #include "elf.h" 26*228d5505STony Breeds #include "string.h" 27*228d5505STony Breeds #include "stdio.h" 28*228d5505STony Breeds #include "page.h" 29*228d5505STony Breeds #include "ops.h" 30*228d5505STony Breeds #include "reg.h" 31*228d5505STony Breeds #include "io.h" 32*228d5505STony Breeds #include "dcr.h" 33*228d5505STony Breeds #include "4xx.h" 34*228d5505STony Breeds #include "44x.h" 35*228d5505STony Breeds #include "libfdt.h" 36*228d5505STony Breeds 37*228d5505STony Breeds BSS_STACK(4096); 38*228d5505STony Breeds 39*228d5505STony Breeds #define MAX_RANKS 0x4 40*228d5505STony Breeds #define DDR3_MR0CF 0x80010011U 41*228d5505STony Breeds 42*228d5505STony Breeds static unsigned long long ibm_currituck_memsize; 43*228d5505STony Breeds static unsigned long long ibm_currituck_detect_memsize(void) 44*228d5505STony Breeds { 45*228d5505STony Breeds u32 reg; 46*228d5505STony Breeds unsigned i; 47*228d5505STony Breeds unsigned long long memsize = 0; 48*228d5505STony Breeds 49*228d5505STony Breeds for(i = 0; i < MAX_RANKS; i++){ 50*228d5505STony Breeds reg = mfdcrx(DDR3_MR0CF + i); 51*228d5505STony Breeds 52*228d5505STony Breeds if (!(reg & 1)) 53*228d5505STony Breeds continue; 54*228d5505STony Breeds 55*228d5505STony Breeds reg &= 0x0000f000; 56*228d5505STony Breeds reg >>= 12; 57*228d5505STony Breeds memsize += (0x800000ULL << reg); 58*228d5505STony Breeds } 59*228d5505STony Breeds 60*228d5505STony Breeds return memsize; 61*228d5505STony Breeds } 62*228d5505STony Breeds 63*228d5505STony Breeds static void ibm_currituck_fixups(void) 64*228d5505STony Breeds { 65*228d5505STony Breeds void *devp = finddevice("/"); 66*228d5505STony Breeds u32 dma_ranges[7]; 67*228d5505STony Breeds 68*228d5505STony Breeds dt_fixup_memory(0x0ULL, ibm_currituck_memsize); 69*228d5505STony Breeds 70*228d5505STony Breeds while ((devp = find_node_by_devtype(devp, "pci"))) { 71*228d5505STony Breeds if (getprop(devp, "dma-ranges", dma_ranges, sizeof(dma_ranges)) < 0) { 72*228d5505STony Breeds printf("%s: Failed to get dma-ranges\r\n", __func__); 73*228d5505STony Breeds continue; 74*228d5505STony Breeds } 75*228d5505STony Breeds 76*228d5505STony Breeds dma_ranges[5] = ibm_currituck_memsize >> 32; 77*228d5505STony Breeds dma_ranges[6] = ibm_currituck_memsize & 0xffffffffUL; 78*228d5505STony Breeds 79*228d5505STony Breeds setprop(devp, "dma-ranges", dma_ranges, sizeof(dma_ranges)); 80*228d5505STony Breeds } 81*228d5505STony Breeds } 82*228d5505STony Breeds 83*228d5505STony Breeds #define SPRN_PIR 0x11E /* Processor Indentification Register */ 84*228d5505STony Breeds void platform_init(void) 85*228d5505STony Breeds { 86*228d5505STony Breeds unsigned long end_of_ram, avail_ram; 87*228d5505STony Breeds u32 pir_reg; 88*228d5505STony Breeds int node, size; 89*228d5505STony Breeds const u32 *timebase; 90*228d5505STony Breeds 91*228d5505STony Breeds ibm_currituck_memsize = ibm_currituck_detect_memsize(); 92*228d5505STony Breeds if (ibm_currituck_memsize >> 32) 93*228d5505STony Breeds end_of_ram = ~0UL; 94*228d5505STony Breeds else 95*228d5505STony Breeds end_of_ram = ibm_currituck_memsize; 96*228d5505STony Breeds avail_ram = end_of_ram - (unsigned long)_end; 97*228d5505STony Breeds 98*228d5505STony Breeds simple_alloc_init(_end, avail_ram, 128, 64); 99*228d5505STony Breeds platform_ops.fixups = ibm_currituck_fixups; 100*228d5505STony Breeds platform_ops.exit = ibm44x_dbcr_reset; 101*228d5505STony Breeds pir_reg = mfspr(SPRN_PIR); 102*228d5505STony Breeds 103*228d5505STony Breeds /* Make sure FDT blob is sane */ 104*228d5505STony Breeds if (fdt_check_header(_dtb_start) != 0) 105*228d5505STony Breeds fatal("Invalid device tree blob\n"); 106*228d5505STony Breeds 107*228d5505STony Breeds node = fdt_node_offset_by_prop_value(_dtb_start, -1, "device_type", 108*228d5505STony Breeds "cpu", sizeof("cpu")); 109*228d5505STony Breeds if (!node) 110*228d5505STony Breeds fatal("Cannot find cpu node\n"); 111*228d5505STony Breeds timebase = fdt_getprop(_dtb_start, node, "timebase-frequency", &size); 112*228d5505STony Breeds if (timebase && (size == 4)) 113*228d5505STony Breeds timebase_period_ns = 1000000000 / *timebase; 114*228d5505STony Breeds 115*228d5505STony Breeds fdt_set_boot_cpuid_phys(_dtb_start, pir_reg); 116*228d5505STony Breeds fdt_init(_dtb_start); 117*228d5505STony Breeds 118*228d5505STony Breeds serial_console_init(); 119*228d5505STony Breeds } 120