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 
18 extern int lv1_panic(u64 in_1);
19 extern int lv1_get_logical_partition_id(u64 *out_1);
20 extern int lv1_get_logical_ppe_id(u64 *out_1);
21 extern 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 
24 BSS_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 
31 static char cmdline[BOOT_COMMAND_LINE_SIZE]
32 	__attribute__((__section__("__builtin_cmdline")));
33 
prep_cmdline(void * chosen)34 static 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 
ps3_console_write(const char * buf,int len)44 static void ps3_console_write(const char *buf, int len)
45 {
46 }
47 
ps3_exit(void)48 static 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 
ps3_repository_read_rm_size(u64 * rm_size)58 static 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 
ps3_copy_vectors(void)95 void 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 
platform_init(void)103 void 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