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