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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
b4e8c8dd TS |
2 | /* |
3 | * Copyright 2010 Ben. Herrenschmidt, 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. | |
b4e8c8dd TS |
15 | */ |
16 | #include <stdarg.h> | |
17 | #include <stddef.h> | |
18 | #include "types.h" | |
19 | #include "elf.h" | |
20 | #include "string.h" | |
21 | #include "stdio.h" | |
22 | #include "page.h" | |
23 | #include "ops.h" | |
24 | #include "reg.h" | |
25 | #include "io.h" | |
26 | #include "dcr.h" | |
27 | #include "4xx.h" | |
28 | #include "44x.h" | |
29 | #include "libfdt.h" | |
30 | ||
31 | BSS_STACK(4096); | |
32 | ||
e817513b DK |
33 | static u32 ibm4xx_memstart; |
34 | ||
b4e8c8dd TS |
35 | static void iss_4xx_fixups(void) |
36 | { | |
e817513b DK |
37 | void *memory; |
38 | u32 reg[3]; | |
39 | ||
40 | memory = finddevice("/memory"); | |
41 | if (!memory) | |
42 | fatal("Can't find memory node\n"); | |
43 | /* This assumes #address-cells = 2, #size-cells =1 and that */ | |
44 | getprop(memory, "reg", reg, sizeof(reg)); | |
45 | if (reg[2]) | |
46 | /* If the device tree specifies the memory range, use it */ | |
47 | ibm4xx_memstart = reg[1]; | |
48 | else | |
49 | /* othersize, read it from the SDRAM controller */ | |
50 | ibm4xx_sdram_fixup_memsize(); | |
51 | } | |
52 | ||
53 | static void *iss_4xx_vmlinux_alloc(unsigned long size) | |
54 | { | |
55 | return (void *)ibm4xx_memstart; | |
b4e8c8dd TS |
56 | } |
57 | ||
446957ba | 58 | #define SPRN_PIR 0x11E /* Processor Identification Register */ |
b4e8c8dd TS |
59 | void platform_init(void) |
60 | { | |
61 | unsigned long end_of_ram = 0x08000000; | |
62 | unsigned long avail_ram = end_of_ram - (unsigned long)_end; | |
63 | u32 pir_reg; | |
64 | ||
65 | simple_alloc_init(_end, avail_ram, 128, 64); | |
66 | platform_ops.fixups = iss_4xx_fixups; | |
e817513b | 67 | platform_ops.vmlinux_alloc = iss_4xx_vmlinux_alloc; |
b4e8c8dd TS |
68 | platform_ops.exit = ibm44x_dbcr_reset; |
69 | pir_reg = mfspr(SPRN_PIR); | |
70 | fdt_set_boot_cpuid_phys(_dtb_start, pir_reg); | |
71 | fdt_init(_dtb_start); | |
72 | serial_console_init(); | |
73 | } |