release/src-rt-6.x.4708/linux/linux-2.6.36/arch/powerpc/boot/ps3.c

   1 /*
   2  *  PS3 bootwrapper support.
   3  *
   4  *  Copyright (C) 2007 Sony Computer Entertainment Inc.
   5  *  Copyright 2007 Sony Corp.
   6  *
   7  *  This program is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License as published by
   9  *  the Free Software Foundation; version 2 of the License.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include <stdarg.h>
  22 #include <stddef.h>
  23 #include "types.h"
  24 #include "elf.h"
  25 #include "string.h"
  26 #include "stdio.h"
  27 #include "page.h"
  28 #include "ops.h"
  29
  30 extern int lv1_panic(u64 in_1);
  31 extern int lv1_get_logical_partition_id(u64 *out_1);
  32 extern int lv1_get_logical_ppe_id(u64 *out_1);
  33 extern int lv1_get_repository_node_value(u64 in_1, u64 in_2, u64 in_3,
  34         u64 in_4, u64 in_5, u64 *out_1, u64 *out_2);
  35
  36 #ifdef DEBUG
  37 #define DBG(fmt...) printf(fmt)
  38 #else
  39 static inline int __attribute__ ((format (printf, 1, 2))) DBG(
  40         const char *fmt, ...) {return 0;}
  41 #endif
  42
  43 BSS_STACK(4096);
  44
  45 /* A buffer that may be edited by tools operating on a zImage binary so as to
  46  * edit the command line passed to vmlinux (by setting /chosen/bootargs).
  47  * The buffer is put in it's own section so that tools may locate it easier.
  48  */
  49
  50 static char cmdline[COMMAND_LINE_SIZE]
  51         __attribute__((__section__("__builtin_cmdline")));
  52
  53 static void prep_cmdline(void *chosen)
  54 {
  55         if (cmdline[0] == '\0')
  56                 getprop(chosen, "bootargs", cmdline, COMMAND_LINE_SIZE-1);
  57         else
  58                 setprop_str(chosen, "bootargs", cmdline);
  59
  60         printf("cmdline: '%s'\n", cmdline);
  61 }
  62
  63 static void ps3_console_write(const char *buf, int len)
  64 {
  65 }
  66
  67 static void ps3_exit(void)
  68 {
  69         printf("ps3_exit\n");
  70
  71         /* lv1_panic will shutdown the lpar. */
  72
  73         lv1_panic(0); /* zero = do not reboot */
  74         while (1);
  75 }
  76
  77 static int ps3_repository_read_rm_size(u64 *rm_size)
  78 {
  79         int result;
  80         u64 lpar_id;
  81         u64 ppe_id;
  82         u64 v2;
  83
  84         result = lv1_get_logical_partition_id(&lpar_id);
  85
  86         if (result)
  87                 return -1;
  88
  89         result = lv1_get_logical_ppe_id(&ppe_id);
  90
  91         if (result)
  92                 return -1;
  93
  94         /*
  95          * n1: 0000000062690000 : ....bi..
  96          * n2: 7075000000000000 : pu......
  97          * n3: 0000000000000001 : ........
  98          * n4: 726d5f73697a6500 : rm_size.
  99         */
 100
 101         result = lv1_get_repository_node_value(lpar_id, 0x0000000062690000ULL,
 102                 0x7075000000000000ULL, ppe_id, 0x726d5f73697a6500ULL, rm_size,
 103                 &v2);
 104
 105         printf("%s:%d: ppe_id  %lu \n", __func__, __LINE__,
 106                 (unsigned long)ppe_id);
 107         printf("%s:%d: lpar_id %lu \n", __func__, __LINE__,
 108                 (unsigned long)lpar_id);
 109         printf("%s:%d: rm_size %llxh \n", __func__, __LINE__, *rm_size);
 110
 111         return result ? -1 : 0;
 112 }
 113
 114 void ps3_copy_vectors(void)
 115 {
 116         extern char __system_reset_kernel[];
 117
 118         memcpy((void *)0x100, __system_reset_kernel, 512);
 119         flush_cache((void *)0x100, 512);
 120 }
 121
 122 void platform_init(unsigned long null_check)
 123 {
 124         const u32 heapsize = 0x1000000 - (u32)_end; /* 16MiB */
 125         void *chosen;
 126         unsigned long ft_addr;
 127         u64 rm_size;
 128         unsigned long val;
 129
 130         console_ops.write = ps3_console_write;
 131         platform_ops.exit = ps3_exit;
 132
 133         printf("\n-- PS3 bootwrapper --\n");
 134
 135         simple_alloc_init(_end, heapsize, 32, 64);
 136         fdt_init(_dtb_start);
 137
 138         chosen = finddevice("/chosen");
 139
 140         ps3_repository_read_rm_size(&rm_size);
 141         dt_fixup_memory(0, rm_size);
 142
 143         if (_initrd_end > _initrd_start) {
 144                 setprop_val(chosen, "linux,initrd-start", (u32)(_initrd_start));
 145                 setprop_val(chosen, "linux,initrd-end", (u32)(_initrd_end));
 146         }
 147
 148         prep_cmdline(chosen);
 149
 150         ft_addr = dt_ops.finalize();
 151
 152         ps3_copy_vectors();
 153
 154         printf(" flat tree at 0x%lx\n\r", ft_addr);
 155
 156         val = *(unsigned long *)0;
 157
 158         if (val != null_check)
 159                 printf("null check failed: %lx != %lx\n\r", val, null_check);
 160
 161         ((kernel_entry_t)0)(ft_addr, 0, NULL);
 162
 163         ps3_exit();
 164 }