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 s64 lv1_panic(u64 in_1);
  31 extern s64 lv1_get_logical_partition_id(u64 *out_1);
  32 extern s64 lv1_get_logical_ppe_id(u64 *out_1);
  33 extern s64 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 static char cmdline[COMMAND_LINE_SIZE]
  50         __attribute__((__section__("__builtin_cmdline")));
  51
  52 static void prep_cmdline(void *chosen)
  53 {
  54         if (cmdline[0] == '\0')
  55                 getprop(chosen, "bootargs", cmdline, COMMAND_LINE_SIZE-1);
  56         else
  57                 setprop_str(chosen, "bootargs", cmdline);
  58
  59         printf("cmdline: '%s'\n", cmdline);
  60 }
  61
  62 static void ps3_console_write(const char *buf, int len)
  63 {
  64 }
  65
  66 static void ps3_exit(void)
  67 {
  68         printf("ps3_exit\n");
  69
  70         /* lv1_panic will shutdown the lpar. */
  71
  72         lv1_panic(0); /* zero = do not reboot */
  73         while (1);
  74 }
  75
  76 static int ps3_repository_read_rm_size(u64 *rm_size)
  77 {
  78         s64 result;
  79         u64 lpar_id;
  80         u64 ppe_id;
  81         u64 v2;
  82
  83         result = lv1_get_logical_partition_id(&lpar_id);
  84
  85         if (result)
  86                 return -1;
  87
  88         result = lv1_get_logical_ppe_id(&ppe_id);
  89
  90         if (result)
  91                 return -1;
  92
  93         /*
  94          * n1: 0000000062690000 : ....bi..
  95          * n2: 7075000000000000 : pu......
  96          * n3: 0000000000000001 : ........
  97          * n4: 726d5f73697a6500 : rm_size.
  98         */
  99
 100         result = lv1_get_repository_node_value(lpar_id, 0x0000000062690000ULL,
 101                 0x7075000000000000ULL, ppe_id, 0x726d5f73697a6500ULL, rm_size,
 102                 &v2);
 103
 104         printf("%s:%d: ppe_id  %lu \n", __func__, __LINE__,
 105                 (unsigned long)ppe_id);
 106         printf("%s:%d: lpar_id %lu \n", __func__, __LINE__,
 107                 (unsigned long)lpar_id);
 108         printf("%s:%d: rm_size %llxh \n", __func__, __LINE__, *rm_size);
 109
 110         return result ? -1 : 0;
 111 }
 112
 113 void ps3_copy_vectors(void)
 114 {
 115         extern char __system_reset_kernel[];
 116
 117         memcpy((void *)0x100, __system_reset_kernel, 0x100);
 118         flush_cache((void *)0x100, 0x100);
 119 }
 120
 121 void platform_init(void)
 122 {
 123         const u32 heapsize = 0x1000000 - (u32)_end; /* 16MiB */
 124         void *chosen;
 125         unsigned long ft_addr;
 126         u64 rm_size;
 127
 128         console_ops.write = ps3_console_write;
 129         platform_ops.exit = ps3_exit;
 130
 131         printf("\n-- PS3 bootwrapper --\n");
 132
 133         simple_alloc_init(_end, heapsize, 32, 64);
 134         ft_init(_dtb_start, 0, 4);
 135
 136         chosen = finddevice("/chosen");
 137
 138         ps3_repository_read_rm_size(&rm_size);
 139         dt_fixup_memory(0, rm_size);
 140
 141         if (_initrd_end > _initrd_start) {
 142                 setprop_val(chosen, "linux,initrd-start", (u32)(_initrd_start));
 143                 setprop_val(chosen, "linux,initrd-end", (u32)(_initrd_end));
 144         }
 145
 146         prep_cmdline(chosen);
 147
 148         ft_addr = dt_ops.finalize();
 149
 150         ps3_copy_vectors();
 151
 152         printf(" flat tree at 0x%lx\n\r", ft_addr);
 153
 154         ((kernel_entry_t)0)(ft_addr, 0, NULL);
 155
 156         ps3_exit();
 157 }