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 its 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(devp: chosen, name: "bootargs", buf: cmdline, BOOT_COMMAND_LINE_SIZE-1);
38 else
39 setprop_str(devp: chosen, name: "bootargs", buf: cmdline);
40
41 printf(fmt: "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(fmt: "ps3_exit\n");
51
52 /* lv1_panic will shutdown the lpar. */
53
54 lv1_panic(in_1: 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(out_1: &lpar_id);
66
67 if (result)
68 return -1;
69
70 result = lv1_get_logical_ppe_id(out_1: &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(in_1: lpar_id, in_2: 0x0000000062690000ULL,
83 in_3: 0x7075000000000000ULL, in_4: ppe_id, in_5: 0x726d5f73697a6500ULL, out_1: rm_size,
84 out_2: &v2);
85
86 printf(fmt: "%s:%d: ppe_id %lu \n", __func__, __LINE__,
87 (unsigned long)ppe_id);
88 printf(fmt: "%s:%d: lpar_id %lu \n", __func__, __LINE__,
89 (unsigned long)lpar_id);
90 printf(fmt: "%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(dest: (void *)0x100, src: __system_reset_kernel, n: 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(fmt: "\n-- PS3 bootwrapper --\n");
114
115 simple_alloc_init(base: _end, heap_size: heapsize, granularity: 32, max_allocs: 64);
116 fdt_init(blob: _dtb_start);
117
118 chosen = finddevice(name: "/chosen");
119
120 ps3_repository_read_rm_size(rm_size: &rm_size);
121 dt_fixup_memory(start: 0, size: 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(fmt: " 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

source code of linux/arch/powerpc/boot/ps3.c