projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 2a2c74b2 AP |
1 | /* |
| 2 | * Copyright © 2013 Tony Breeds IBM Corporation | |
| 3 | * Copyright © 2013 Alistair Popple 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 | * This program is free software; you can redistribute it and/or | |
| 19 | * modify it under the terms of the GNU General Public License | |
| 20 | * as published by the Free Software Foundation; either version | |
| 21 | * 2 of the License, or (at your option) any later version. | |
| 22 | */ | |
| 23 | #include <stdarg.h> | |
| 24 | #include <stddef.h> | |
| 25 | #include "types.h" | |
| 26 | #include "elf.h" | |
| 27 | #include "string.h" | |
| 28 | #include "stdlib.h" | |
| 29 | #include "stdio.h" | |
| 30 | #include "page.h" | |
| 31 | #include "ops.h" | |
| 32 | #include "reg.h" | |
| 33 | #include "io.h" | |
| 34 | #include "dcr.h" | |
| 35 | #include "4xx.h" | |
| 36 | #include "44x.h" | |
| 37 | #include "libfdt.h" | |
| 38 | ||
| 39 | BSS_STACK(4096); | |
| 40 | ||
| 41 | #define SPRN_PIR 0x11E /* Processor Indentification Register */ | |
| 42 | #define USERDATA_LEN 256 /* Length of userdata passed in by PIBS */ | |
| 43 | #define MAX_RANKS 0x4 | |
| 44 | #define DDR3_MR0CF 0x80010011U | |
| 45 | #define CCTL0_MCO2 0x8000080FU | |
| 46 | #define CCTL0_MCO3 0x80000810U | |
| 47 | #define CCTL0_MCO4 0x80000811U | |
| 48 | #define CCTL0_MCO5 0x80000812U | |
| 49 | #define CCTL0_MCO6 0x80000813U | |
| 50 | ||
| 51 | static unsigned long long ibm_akebono_memsize; | |
| 52 | static long long unsigned mac_addr; | |
| 53 | ||
| 54 | static unsigned long long ibm_akebono_detect_memsize(void) | |
| 55 | { | |
| 56 | u32 reg; | |
| 57 | unsigned i; | |
| 58 | unsigned long long memsize = 0; | |
| 59 | ||
| 60 | for (i = 0; i < MAX_RANKS; i++) { | |
| 61 | reg = mfdcrx(DDR3_MR0CF + i); | |
| 62 | ||
| 63 | if (!(reg & 1)) | |
| 64 | continue; | |
| 65 | ||
| 66 | reg &= 0x0000f000; | |
| 67 | reg >>= 12; | |
| 68 | memsize += (0x800000ULL << reg); | |
| 69 | } | |
| 70 | ||
| 71 | return memsize; | |
| 72 | } | |
| 73 | ||
| 74 | static void ibm_akebono_fixups(void) | |
| 75 | { | |
| 76 | void *emac; | |
| 77 | u32 reg; | |
| 2a2c74b2 AP |
78 | |
| 79 | dt_fixup_memory(0x0ULL, ibm_akebono_memsize); | |
| 80 | ||
| 2a2c74b2 AP |
81 | /* Fixup the SD timeout frequency */ |
| 82 | mtdcrx(CCTL0_MCO4, 0x1); | |
| 83 | ||
| 84 | /* Disable SD high-speed mode (which seems to be broken) */ | |
| 85 | reg = mfdcrx(CCTL0_MCO2) & ~0x2; | |
| 86 | mtdcrx(CCTL0_MCO2, reg); | |
| 87 | ||
| 88 | /* Set the MAC address */ | |
| 89 | emac = finddevice("/plb/opb/ethernet"); | |
| 90 | if (emac > 0) { | |
| 91 | if (mac_addr) | |
| 92 | setprop(emac, "local-mac-address", | |
| 93 | ((u8 *) &mac_addr) + 2 , 6); | |
| 94 | } | |
| 95 | } | |
| 96 | ||
| 97 | void platform_init(char *userdata) | |
| 98 | { | |
| 99 | unsigned long end_of_ram, avail_ram; | |
| 100 | u32 pir_reg; | |
| 101 | int node, size; | |
| 102 | const u32 *timebase; | |
| 103 | int len, i, userdata_len; | |
| 104 | char *end; | |
| 105 | ||
| 106 | userdata[USERDATA_LEN - 1] = '\0'; | |
| 107 | userdata_len = strlen(userdata); | |
| 108 | for (i = 0; i < userdata_len - 15; i++) { | |
| 109 | if (strncmp(&userdata[i], "local-mac-addr=", 15) == 0) { | |
| 110 | if (i > 0 && userdata[i - 1] != ' ') { | |
| 111 | /* We've only found a substring ending | |
| 112 | * with local-mac-addr so this isn't | |
| 113 | * our mac address. */ | |
| 114 | continue; | |
| 115 | } | |
| 116 | ||
| 117 | mac_addr = strtoull(&userdata[i + 15], &end, 16); | |
| 118 | ||
| 119 | /* Remove the "local-mac-addr=<...>" from the kernel | |
| 120 | * command line, including the tailing space if | |
| 121 | * present. */ | |
| 122 | if (*end == ' ') | |
| 123 | end++; | |
| 124 | ||
| 125 | len = ((int) end) - ((int) &userdata[i]); | |
| 126 | memmove(&userdata[i], end, | |
| 127 | userdata_len - (len + i) + 1); | |
| 128 | break; | |
| 129 | } | |
| 130 | } | |
| 131 | ||
| 132 | loader_info.cmdline = userdata; | |
| 133 | loader_info.cmdline_len = 256; | |
| 134 | ||
| 135 | ibm_akebono_memsize = ibm_akebono_detect_memsize(); | |
| 136 | if (ibm_akebono_memsize >> 32) | |
| 137 | end_of_ram = ~0UL; | |
| 138 | else | |
| 139 | end_of_ram = ibm_akebono_memsize; | |
| 140 | avail_ram = end_of_ram - (unsigned long)_end; | |
| 141 | ||
| 142 | simple_alloc_init(_end, avail_ram, 128, 64); | |
| 143 | platform_ops.fixups = ibm_akebono_fixups; | |
| 144 | platform_ops.exit = ibm44x_dbcr_reset; | |
| 145 | pir_reg = mfspr(SPRN_PIR); | |
| 146 | ||
| 147 | /* Make sure FDT blob is sane */ | |
| 148 | if (fdt_check_header(_dtb_start) != 0) | |
| 149 | fatal("Invalid device tree blob\n"); | |
| 150 | ||
| 151 | node = fdt_node_offset_by_prop_value(_dtb_start, -1, "device_type", | |
| 152 | "cpu", sizeof("cpu")); | |
| 153 | if (!node) | |
| 154 | fatal("Cannot find cpu node\n"); | |
| 155 | timebase = fdt_getprop(_dtb_start, node, "timebase-frequency", &size); | |
| 156 | if (timebase && (size == 4)) | |
| 157 | timebase_period_ns = 1000000000 / *timebase; | |
| 158 | ||
| 159 | fdt_set_boot_cpuid_phys(_dtb_start, pir_reg); | |
| 160 | fdt_init(_dtb_start); | |
| 161 | ||
| 162 | serial_console_init(); | |
| 163 | } |