| xj | b04a402 | 2021-11-25 15:01:52 +0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2010 Ben. Herrenschmidt, 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 | * |
| 15 | * This program is free software; you can redistribute it and/or |
| 16 | * modify it under the terms of the GNU General Public License |
| 17 | * as published by the Free Software Foundation; either version |
| 18 | * 2 of the License, or (at your option) any later version. |
| 19 | */ |
| 20 | #include <stdarg.h> |
| 21 | #include <stddef.h> |
| 22 | #include "types.h" |
| 23 | #include "elf.h" |
| 24 | #include "string.h" |
| 25 | #include "stdio.h" |
| 26 | #include "page.h" |
| 27 | #include "ops.h" |
| 28 | #include "reg.h" |
| 29 | #include "io.h" |
| 30 | #include "dcr.h" |
| 31 | #include "4xx.h" |
| 32 | #include "44x.h" |
| 33 | #include "libfdt.h" |
| 34 | |
| 35 | BSS_STACK(4096); |
| 36 | |
| 37 | static u32 ibm4xx_memstart; |
| 38 | |
| 39 | static void iss_4xx_fixups(void) |
| 40 | { |
| 41 | void *memory; |
| 42 | u32 reg[3]; |
| 43 | |
| 44 | memory = finddevice("/memory"); |
| 45 | if (!memory) |
| 46 | fatal("Can't find memory node\n"); |
| 47 | /* This assumes #address-cells = 2, #size-cells =1 and that */ |
| 48 | getprop(memory, "reg", reg, sizeof(reg)); |
| 49 | if (reg[2]) |
| 50 | /* If the device tree specifies the memory range, use it */ |
| 51 | ibm4xx_memstart = reg[1]; |
| 52 | else |
| 53 | /* othersize, read it from the SDRAM controller */ |
| 54 | ibm4xx_sdram_fixup_memsize(); |
| 55 | } |
| 56 | |
| 57 | static void *iss_4xx_vmlinux_alloc(unsigned long size) |
| 58 | { |
| 59 | return (void *)ibm4xx_memstart; |
| 60 | } |
| 61 | |
| 62 | #define SPRN_PIR 0x11E /* Processor Identification Register */ |
| 63 | void platform_init(void) |
| 64 | { |
| 65 | unsigned long end_of_ram = 0x08000000; |
| 66 | unsigned long avail_ram = end_of_ram - (unsigned long)_end; |
| 67 | u32 pir_reg; |
| 68 | |
| 69 | simple_alloc_init(_end, avail_ram, 128, 64); |
| 70 | platform_ops.fixups = iss_4xx_fixups; |
| 71 | platform_ops.vmlinux_alloc = iss_4xx_vmlinux_alloc; |
| 72 | platform_ops.exit = ibm44x_dbcr_reset; |
| 73 | pir_reg = mfspr(SPRN_PIR); |
| 74 | fdt_set_boot_cpuid_phys(_dtb_start, pir_reg); |
| 75 | fdt_init(_dtb_start); |
| 76 | serial_console_init(); |
| 77 | } |