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159 lines
3.8 KiB
159 lines
3.8 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* Copyright © 2013 Tony Breeds IBM Corporation |
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* Copyright © 2013 Alistair Popple IBM Corporation |
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* |
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* Based on earlier code: |
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* Copyright (C) Paul Mackerras 1997. |
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* |
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* Matt Porter <[email protected]> |
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* Copyright 2002-2005 MontaVista Software Inc. |
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* |
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* Eugene Surovegin <[email protected]> or <[email protected]> |
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* Copyright (c) 2003, 2004 Zultys Technologies |
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* |
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* Copyright 2007 David Gibson, IBM Corporation. |
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* Copyright 2010 Ben. Herrenschmidt, IBM Corporation. |
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* Copyright © 2011 David Kleikamp IBM Corporation |
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*/ |
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#include <stdarg.h> |
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#include <stddef.h> |
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#include "types.h" |
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#include "elf.h" |
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#include "string.h" |
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#include "stdlib.h" |
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#include "stdio.h" |
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#include "page.h" |
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#include "ops.h" |
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#include "reg.h" |
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#include "io.h" |
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#include "dcr.h" |
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#include "4xx.h" |
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#include "44x.h" |
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#include "libfdt.h" |
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BSS_STACK(4096); |
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#define SPRN_PIR 0x11E /* Processor Identification Register */ |
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#define USERDATA_LEN 256 /* Length of userdata passed in by PIBS */ |
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#define MAX_RANKS 0x4 |
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#define DDR3_MR0CF 0x80010011U |
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#define CCTL0_MCO2 0x8000080FU |
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#define CCTL0_MCO3 0x80000810U |
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#define CCTL0_MCO4 0x80000811U |
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#define CCTL0_MCO5 0x80000812U |
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#define CCTL0_MCO6 0x80000813U |
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static unsigned long long ibm_akebono_memsize; |
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static long long unsigned mac_addr; |
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static unsigned long long ibm_akebono_detect_memsize(void) |
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{ |
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u32 reg; |
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unsigned i; |
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unsigned long long memsize = 0; |
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for (i = 0; i < MAX_RANKS; i++) { |
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reg = mfdcrx(DDR3_MR0CF + i); |
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if (!(reg & 1)) |
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continue; |
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reg &= 0x0000f000; |
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reg >>= 12; |
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memsize += (0x800000ULL << reg); |
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} |
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return memsize; |
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} |
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static void ibm_akebono_fixups(void) |
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{ |
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void *emac; |
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u32 reg; |
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dt_fixup_memory(0x0ULL, ibm_akebono_memsize); |
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/* Fixup the SD timeout frequency */ |
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mtdcrx(CCTL0_MCO4, 0x1); |
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/* Disable SD high-speed mode (which seems to be broken) */ |
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reg = mfdcrx(CCTL0_MCO2) & ~0x2; |
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mtdcrx(CCTL0_MCO2, reg); |
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/* Set the MAC address */ |
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emac = finddevice("/plb/opb/ethernet"); |
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if (emac > 0) { |
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if (mac_addr) |
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setprop(emac, "local-mac-address", |
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((u8 *) &mac_addr) + 2 , 6); |
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} |
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} |
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void platform_init(char *userdata) |
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{ |
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unsigned long end_of_ram, avail_ram; |
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u32 pir_reg; |
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int node, size; |
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const u32 *timebase; |
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int len, i, userdata_len; |
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char *end; |
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userdata[USERDATA_LEN - 1] = '\0'; |
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userdata_len = strlen(userdata); |
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for (i = 0; i < userdata_len - 15; i++) { |
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if (strncmp(&userdata[i], "local-mac-addr=", 15) == 0) { |
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if (i > 0 && userdata[i - 1] != ' ') { |
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/* We've only found a substring ending |
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* with local-mac-addr so this isn't |
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* our mac address. */ |
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continue; |
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} |
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mac_addr = strtoull(&userdata[i + 15], &end, 16); |
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/* Remove the "local-mac-addr=<...>" from the kernel |
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* command line, including the tailing space if |
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* present. */ |
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if (*end == ' ') |
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end++; |
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len = ((int) end) - ((int) &userdata[i]); |
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memmove(&userdata[i], end, |
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userdata_len - (len + i) + 1); |
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break; |
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} |
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} |
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loader_info.cmdline = userdata; |
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loader_info.cmdline_len = 256; |
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ibm_akebono_memsize = ibm_akebono_detect_memsize(); |
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if (ibm_akebono_memsize >> 32) |
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end_of_ram = ~0UL; |
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else |
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end_of_ram = ibm_akebono_memsize; |
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avail_ram = end_of_ram - (unsigned long)_end; |
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simple_alloc_init(_end, avail_ram, 128, 64); |
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platform_ops.fixups = ibm_akebono_fixups; |
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platform_ops.exit = ibm44x_dbcr_reset; |
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pir_reg = mfspr(SPRN_PIR); |
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/* Make sure FDT blob is sane */ |
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if (fdt_check_header(_dtb_start) != 0) |
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fatal("Invalid device tree blob\n"); |
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node = fdt_node_offset_by_prop_value(_dtb_start, -1, "device_type", |
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"cpu", sizeof("cpu")); |
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if (!node) |
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fatal("Cannot find cpu node\n"); |
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timebase = fdt_getprop(_dtb_start, node, "timebase-frequency", &size); |
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if (timebase && (size == 4)) |
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timebase_period_ns = 1000000000 / *timebase; |
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fdt_set_boot_cpuid_phys(_dtb_start, pir_reg); |
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fdt_init(_dtb_start); |
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serial_console_init(); |
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}
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