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