arch/powerpc/boot/ps3.c

   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
  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
  44 static void ps3_console_write(const char *buf, int len)
  45 {
  46 }
  47
  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
  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
  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
 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 }