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Linux kernel mirror (for testing)
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linux
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Embedded Planet EP405 with PlanetCore firmware
4 *
5 * (c) Benjamin Herrenschmidt <benh@kernel.crashing.org>, IBM Corp,\
6 *
7 * Based on ep88xc.c by
8 *
9 * Scott Wood <scottwood@freescale.com>
10 *
11 * Copyright (c) 2007 Freescale Semiconductor, Inc.
12 */
13
14#include "ops.h"
15#include "stdio.h"
16#include "planetcore.h"
17#include "dcr.h"
18#include "4xx.h"
19#include "io.h"
20
21static char *table;
22static u64 mem_size;
23
24static void platform_fixups(void)
25{
26 u64 val;
27 void *nvrtc;
28
29 dt_fixup_memory(0, mem_size);
30 planetcore_set_mac_addrs(table);
31
32 if (!planetcore_get_decimal(table, PLANETCORE_KEY_CRYSTAL_HZ, &val)) {
33 printf("No PlanetCore crystal frequency key.\r\n");
34 return;
35 }
36 ibm405gp_fixup_clocks(val, 0xa8c000);
37 ibm4xx_quiesce_eth((u32 *)0xef600800, NULL);
38 ibm4xx_fixup_ebc_ranges("/plb/ebc");
39
40 if (!planetcore_get_decimal(table, PLANETCORE_KEY_KB_NVRAM, &val)) {
41 printf("No PlanetCore NVRAM size key.\r\n");
42 return;
43 }
44 nvrtc = finddevice("/plb/ebc/nvrtc@4,200000");
45 if (nvrtc != NULL) {
46 u32 reg[3] = { 4, 0x200000, 0};
47 getprop(nvrtc, "reg", reg, 3);
48 reg[2] = (val << 10) & 0xffffffff;
49 setprop(nvrtc, "reg", reg, 3);
50 }
51}
52
53void platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
54 unsigned long r6, unsigned long r7)
55{
56 table = (char *)r3;
57 planetcore_prepare_table(table);
58
59 if (!planetcore_get_decimal(table, PLANETCORE_KEY_MB_RAM, &mem_size))
60 return;
61
62 mem_size *= 1024 * 1024;
63 simple_alloc_init(_end, mem_size - (unsigned long)_end, 32, 64);
64
65 fdt_init(_dtb_start);
66
67 planetcore_set_stdout_path(table);
68
69 serial_console_init();
70 platform_ops.fixups = platform_fixups;
71}