1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-or-later
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Copyright 2010 Ben. Herrenschmidt, IBM Corporation.
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Based on earlier code:
6*4882a593Smuzhiyun * Copyright (C) Paul Mackerras 1997.
7*4882a593Smuzhiyun *
8*4882a593Smuzhiyun * Matt Porter <mporter@kernel.crashing.org>
9*4882a593Smuzhiyun * Copyright 2002-2005 MontaVista Software Inc.
10*4882a593Smuzhiyun *
11*4882a593Smuzhiyun * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
12*4882a593Smuzhiyun * Copyright (c) 2003, 2004 Zultys Technologies
13*4882a593Smuzhiyun *
14*4882a593Smuzhiyun * Copyright 2007 David Gibson, IBM Corporation.
15*4882a593Smuzhiyun */
16*4882a593Smuzhiyun #include <stdarg.h>
17*4882a593Smuzhiyun #include <stddef.h>
18*4882a593Smuzhiyun #include "types.h"
19*4882a593Smuzhiyun #include "elf.h"
20*4882a593Smuzhiyun #include "string.h"
21*4882a593Smuzhiyun #include "stdio.h"
22*4882a593Smuzhiyun #include "page.h"
23*4882a593Smuzhiyun #include "ops.h"
24*4882a593Smuzhiyun #include "reg.h"
25*4882a593Smuzhiyun #include "io.h"
26*4882a593Smuzhiyun #include "dcr.h"
27*4882a593Smuzhiyun #include "4xx.h"
28*4882a593Smuzhiyun #include "44x.h"
29*4882a593Smuzhiyun #include "libfdt.h"
30*4882a593Smuzhiyun
31*4882a593Smuzhiyun BSS_STACK(4096);
32*4882a593Smuzhiyun
33*4882a593Smuzhiyun static u32 ibm4xx_memstart;
34*4882a593Smuzhiyun
iss_4xx_fixups(void)35*4882a593Smuzhiyun static void iss_4xx_fixups(void)
36*4882a593Smuzhiyun {
37*4882a593Smuzhiyun void *memory;
38*4882a593Smuzhiyun u32 reg[3];
39*4882a593Smuzhiyun
40*4882a593Smuzhiyun memory = finddevice("/memory");
41*4882a593Smuzhiyun if (!memory)
42*4882a593Smuzhiyun fatal("Can't find memory node\n");
43*4882a593Smuzhiyun /* This assumes #address-cells = 2, #size-cells =1 and that */
44*4882a593Smuzhiyun getprop(memory, "reg", reg, sizeof(reg));
45*4882a593Smuzhiyun if (reg[2])
46*4882a593Smuzhiyun /* If the device tree specifies the memory range, use it */
47*4882a593Smuzhiyun ibm4xx_memstart = reg[1];
48*4882a593Smuzhiyun else
49*4882a593Smuzhiyun /* othersize, read it from the SDRAM controller */
50*4882a593Smuzhiyun ibm4xx_sdram_fixup_memsize();
51*4882a593Smuzhiyun }
52*4882a593Smuzhiyun
iss_4xx_vmlinux_alloc(unsigned long size)53*4882a593Smuzhiyun static void *iss_4xx_vmlinux_alloc(unsigned long size)
54*4882a593Smuzhiyun {
55*4882a593Smuzhiyun return (void *)ibm4xx_memstart;
56*4882a593Smuzhiyun }
57*4882a593Smuzhiyun
58*4882a593Smuzhiyun #define SPRN_PIR 0x11E /* Processor Identification Register */
platform_init(void)59*4882a593Smuzhiyun void platform_init(void)
60*4882a593Smuzhiyun {
61*4882a593Smuzhiyun unsigned long end_of_ram = 0x08000000;
62*4882a593Smuzhiyun unsigned long avail_ram = end_of_ram - (unsigned long)_end;
63*4882a593Smuzhiyun u32 pir_reg;
64*4882a593Smuzhiyun
65*4882a593Smuzhiyun simple_alloc_init(_end, avail_ram, 128, 64);
66*4882a593Smuzhiyun platform_ops.fixups = iss_4xx_fixups;
67*4882a593Smuzhiyun platform_ops.vmlinux_alloc = iss_4xx_vmlinux_alloc;
68*4882a593Smuzhiyun platform_ops.exit = ibm44x_dbcr_reset;
69*4882a593Smuzhiyun pir_reg = mfspr(SPRN_PIR);
70*4882a593Smuzhiyun fdt_set_boot_cpuid_phys(_dtb_start, pir_reg);
71*4882a593Smuzhiyun fdt_init(_dtb_start);
72*4882a593Smuzhiyun serial_console_init();
73*4882a593Smuzhiyun }
74