1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 *  PS3 bootwrapper support.
4 *
5 *  Copyright (C) 2007 Sony Computer Entertainment Inc.
6 *  Copyright 2007 Sony Corp.
7 */
8
9#include <stdarg.h>
10#include <stddef.h>
11#include "types.h"
12#include "elf.h"
13#include "string.h"
14#include "stdio.h"
15#include "page.h"
16#include "ops.h"
17
18extern int lv1_panic(u64 in_1);
19extern int lv1_get_logical_partition_id(u64 *out_1);
20extern int lv1_get_logical_ppe_id(u64 *out_1);
21extern int lv1_get_repository_node_value(u64 in_1, u64 in_2, u64 in_3,
22	u64 in_4, u64 in_5, u64 *out_1, u64 *out_2);
23
24BSS_STACK(4096);
25
26/* A buffer that may be edited by tools operating on a zImage binary so as to
27 * edit the command line passed to vmlinux (by setting /chosen/bootargs).
28 * The buffer is put in it's own section so that tools may locate it easier.
29 */
30
31static char cmdline[BOOT_COMMAND_LINE_SIZE]
32	__attribute__((__section__("__builtin_cmdline")));
33
34static void prep_cmdline(void *chosen)
35{
36	if (cmdline[0] == '\0')
37		getprop(chosen, "bootargs", cmdline, BOOT_COMMAND_LINE_SIZE-1);
38	else
39		setprop_str(chosen, "bootargs", cmdline);
40
41	printf("cmdline: '%s'\n", cmdline);
42}
43
44static void ps3_console_write(const char *buf, int len)
45{
46}
47
48static void ps3_exit(void)
49{
50	printf("ps3_exit\n");
51
52	/* lv1_panic will shutdown the lpar. */
53
54	lv1_panic(0); /* zero = do not reboot */
55	while (1);
56}
57
58static int ps3_repository_read_rm_size(u64 *rm_size)
59{
60	int result;
61	u64 lpar_id;
62	u64 ppe_id;
63	u64 v2;
64
65	result = lv1_get_logical_partition_id(&lpar_id);
66
67	if (result)
68		return -1;
69
70	result = lv1_get_logical_ppe_id(&ppe_id);
71
72	if (result)
73		return -1;
74
75	/*
76	 * n1: 0000000062690000 : ....bi..
77	 * n2: 7075000000000000 : pu......
78	 * n3: 0000000000000001 : ........
79	 * n4: 726d5f73697a6500 : rm_size.
80	*/
81
82	result = lv1_get_repository_node_value(lpar_id, 0x0000000062690000ULL,
83		0x7075000000000000ULL, ppe_id, 0x726d5f73697a6500ULL, rm_size,
84		&v2);
85
86	printf("%s:%d: ppe_id  %lu \n", __func__, __LINE__,
87		(unsigned long)ppe_id);
88	printf("%s:%d: lpar_id %lu \n", __func__, __LINE__,
89		(unsigned long)lpar_id);
90	printf("%s:%d: rm_size %llxh \n", __func__, __LINE__, *rm_size);
91
92	return result ? -1 : 0;
93}
94
95void ps3_copy_vectors(void)
96{
97	extern char __system_reset_kernel[];
98
99	memcpy((void *)0x100, __system_reset_kernel, 512);
100	flush_cache((void *)0x100, 512);
101}
102
103void platform_init(void)
104{
105	const u32 heapsize = 0x1000000 - (u32)_end; /* 16MiB */
106	void *chosen;
107	unsigned long ft_addr;
108	u64 rm_size;
109
110	console_ops.write = ps3_console_write;
111	platform_ops.exit = ps3_exit;
112
113	printf("\n-- PS3 bootwrapper --\n");
114
115	simple_alloc_init(_end, heapsize, 32, 64);
116	fdt_init(_dtb_start);
117
118	chosen = finddevice("/chosen");
119
120	ps3_repository_read_rm_size(&rm_size);
121	dt_fixup_memory(0, rm_size);
122
123	if (&_initrd_end > &_initrd_start) {
124		setprop_val(chosen, "linux,initrd-start", (u32)(_initrd_start));
125		setprop_val(chosen, "linux,initrd-end", (u32)(_initrd_end));
126	}
127
128	prep_cmdline(chosen);
129
130	ft_addr = dt_ops.finalize();
131
132	ps3_copy_vectors();
133
134	printf(" flat tree at 0x%lx\n\r", ft_addr);
135
136	((kernel_entry_t)0)(ft_addr, 0, NULL);
137
138	ps3_exit();
139}
140