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
  24#ifdef DEBUG
  25#define DBG(fmt...) printf(fmt)
  26#else
  27static inline int __attribute__ ((format (printf, 1, 2))) DBG(
  28        const char *fmt, ...) {return 0;}
  29#endif
  30
  31BSS_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
  38static char cmdline[BOOT_COMMAND_LINE_SIZE]
  39        __attribute__((__section__("__builtin_cmdline")));
  40
  41static 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
  51static void ps3_console_write(const char *buf, int len)
  52{
  53}
  54
  55static 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
  65static 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
 102void 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
 110void 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}
 147