root/arch/powerpc/boot/ps3.c

DEFINITIONS

1. DBG
2. prep_cmdline
3. ps3_console_write
4. ps3_exit
5. ps3_repository_read_rm_size
6. ps3_copy_vectors
7. platform_init

   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 #ifdef DEBUG
  25 #define DBG(fmt...) printf(fmt)
  26 #else
  27 static inline int __attribute__ ((format (printf, 1, 2))) DBG(
  28         const char *fmt, ...) {return 0;}
  29 #endif
  30 
  31 BSS_STACK(4096);
  32 
  33 /* A buffer that may be edited by tools operating on a zImage binary so as to
  34  * edit the command line passed to vmlinux (by setting /chosen/bootargs).
  35  * The buffer is put in it's own section so that tools may locate it easier.
  36  */
  37 
  38 static char cmdline[BOOT_COMMAND_LINE_SIZE]
  39         __attribute__((__section__("__builtin_cmdline")));
  40 
  41 static void prep_cmdline(void *chosen)
  42 {
  43         if (cmdline[0] == '\0')
  44                 getprop(chosen, "bootargs", cmdline, BOOT_COMMAND_LINE_SIZE-1);
  45         else
  46                 setprop_str(chosen, "bootargs", cmdline);
  47 
  48         printf("cmdline: '%s'\n", cmdline);
  49 }
  50 
  51 static void ps3_console_write(const char *buf, int len)
  52 {
  53 }
  54 
  55 static void ps3_exit(void)
  56 {
  57         printf("ps3_exit\n");
  58 
  59         /* lv1_panic will shutdown the lpar. */
  60 
  61         lv1_panic(0); /* zero = do not reboot */
  62         while (1);
  63 }
  64 
  65 static int ps3_repository_read_rm_size(u64 *rm_size)
  66 {
  67         int result;
  68         u64 lpar_id;
  69         u64 ppe_id;
  70         u64 v2;
  71 
  72         result = lv1_get_logical_partition_id(&lpar_id);
  73 
  74         if (result)
  75                 return -1;
  76 
  77         result = lv1_get_logical_ppe_id(&ppe_id);
  78 
  79         if (result)
  80                 return -1;
  81 
  82         /*
  83          * n1: 0000000062690000 : ....bi..
  84          * n2: 7075000000000000 : pu......
  85          * n3: 0000000000000001 : ........
  86          * n4: 726d5f73697a6500 : rm_size.
  87         */
  88 
  89         result = lv1_get_repository_node_value(lpar_id, 0x0000000062690000ULL,
  90                 0x7075000000000000ULL, ppe_id, 0x726d5f73697a6500ULL, rm_size,
  91                 &v2);
  92 
  93         printf("%s:%d: ppe_id  %lu \n", __func__, __LINE__,
  94                 (unsigned long)ppe_id);
  95         printf("%s:%d: lpar_id %lu \n", __func__, __LINE__,
  96                 (unsigned long)lpar_id);
  97         printf("%s:%d: rm_size %llxh \n", __func__, __LINE__, *rm_size);
  98 
  99         return result ? -1 : 0;
 100 }
 101 
 102 void ps3_copy_vectors(void)
 103 {
 104         extern char __system_reset_kernel[];
 105 
 106         memcpy((void *)0x100, __system_reset_kernel, 512);
 107         flush_cache((void *)0x100, 512);
 108 }
 109 
 110 void platform_init(void)
 111 {
 112         const u32 heapsize = 0x1000000 - (u32)_end; /* 16MiB */
 113         void *chosen;
 114         unsigned long ft_addr;
 115         u64 rm_size;
 116 
 117         console_ops.write = ps3_console_write;
 118         platform_ops.exit = ps3_exit;
 119 
 120         printf("\n-- PS3 bootwrapper --\n");
 121 
 122         simple_alloc_init(_end, heapsize, 32, 64);
 123         fdt_init(_dtb_start);
 124 
 125         chosen = finddevice("/chosen");
 126 
 127         ps3_repository_read_rm_size(&rm_size);
 128         dt_fixup_memory(0, rm_size);
 129 
 130         if (_initrd_end > _initrd_start) {
 131                 setprop_val(chosen, "linux,initrd-start", (u32)(_initrd_start));
 132                 setprop_val(chosen, "linux,initrd-end", (u32)(_initrd_end));
 133         }
 134 
 135         prep_cmdline(chosen);
 136 
 137         ft_addr = dt_ops.finalize();
 138 
 139         ps3_copy_vectors();
 140 
 141         printf(" flat tree at 0x%lx\n\r", ft_addr);
 142 
 143         ((kernel_entry_t)0)(ft_addr, 0, NULL);
 144 
 145         ps3_exit();
 146 }