1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright © 2011 Tony Breeds IBM Corporation 4 * 5 * Based on earlier code: 6 * Copyright (C) Paul Mackerras 1997. 7 * 8 * Matt Porter <mporter@kernel.crashing.org> 9 * Copyright 2002-2005 MontaVista Software Inc. 10 * 11 * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net> 12 * Copyright (c) 2003, 2004 Zultys Technologies 13 * 14 * Copyright 2007 David Gibson, IBM Corporation. 15 * Copyright 2010 Ben. Herrenschmidt, IBM Corporation. 16 * Copyright © 2011 David Kleikamp IBM Corporation 17 */ 18 #include <stdarg.h> 19 #include <stddef.h> 20 #include "types.h" 21 #include "elf.h" 22 #include "string.h" 23 #include "stdio.h" 24 #include "page.h" 25 #include "ops.h" 26 #include "reg.h" 27 #include "io.h" 28 #include "dcr.h" 29 #include "4xx.h" 30 #include "44x.h" 31 #include "libfdt.h" 32 33 BSS_STACK(4096); 34 35 #define MAX_RANKS 0x4 36 #define DDR3_MR0CF 0x80010011U 37 38 static unsigned long long ibm_currituck_memsize; 39 static unsigned long long ibm_currituck_detect_memsize(void) 40 { 41 u32 reg; 42 unsigned i; 43 unsigned long long memsize = 0; 44 45 for(i = 0; i < MAX_RANKS; i++){ 46 reg = mfdcrx(DDR3_MR0CF + i); 47 48 if (!(reg & 1)) 49 continue; 50 51 reg &= 0x0000f000; 52 reg >>= 12; 53 memsize += (0x800000ULL << reg); 54 } 55 56 return memsize; 57 } 58 59 static void ibm_currituck_fixups(void) 60 { 61 void *devp = finddevice("/"); 62 u32 dma_ranges[7]; 63 64 dt_fixup_memory(0x0ULL, ibm_currituck_memsize); 65 66 while ((devp = find_node_by_devtype(devp, "pci"))) { 67 if (getprop(devp, "dma-ranges", dma_ranges, sizeof(dma_ranges)) < 0) { 68 printf("%s: Failed to get dma-ranges\r\n", __func__); 69 continue; 70 } 71 72 dma_ranges[5] = ibm_currituck_memsize >> 32; 73 dma_ranges[6] = ibm_currituck_memsize & 0xffffffffUL; 74 75 setprop(devp, "dma-ranges", dma_ranges, sizeof(dma_ranges)); 76 } 77 } 78 79 #define SPRN_PIR 0x11E /* Processor Identification Register */ 80 void platform_init(void) 81 { 82 unsigned long end_of_ram, avail_ram; 83 u32 pir_reg; 84 int node, size; 85 const u32 *timebase; 86 87 ibm_currituck_memsize = ibm_currituck_detect_memsize(); 88 if (ibm_currituck_memsize >> 32) 89 end_of_ram = ~0UL; 90 else 91 end_of_ram = ibm_currituck_memsize; 92 avail_ram = end_of_ram - (unsigned long)_end; 93 94 simple_alloc_init(_end, avail_ram, 128, 64); 95 platform_ops.fixups = ibm_currituck_fixups; 96 platform_ops.exit = ibm44x_dbcr_reset; 97 pir_reg = mfspr(SPRN_PIR); 98 99 /* Make sure FDT blob is sane */ 100 if (fdt_check_header(_dtb_start) != 0) 101 fatal("Invalid device tree blob\n"); 102 103 node = fdt_node_offset_by_prop_value(_dtb_start, -1, "device_type", 104 "cpu", sizeof("cpu")); 105 if (!node) 106 fatal("Cannot find cpu node\n"); 107 timebase = fdt_getprop(_dtb_start, node, "timebase-frequency", &size); 108 if (timebase && (size == 4)) 109 timebase_period_ns = 1000000000 / *timebase; 110 111 fdt_set_boot_cpuid_phys(_dtb_start, pir_reg); 112 fdt_init(_dtb_start); 113 114 serial_console_init(); 115 } 116