| Tony Breeds | 228d550 | 2011-11-30 21:39:24 +0000 | [diff] [blame] | 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 Indentification 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 | } |