LXR uboot/arch/x86/lib/spl.c

   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 * Copyright (c) 2016 Google, Inc
   4 */
   5
   6#include <common.h>
   7#include <debug_uart.h>
   8#include <spl.h>
   9#include <asm/cpu.h>
  10#include <asm/mtrr.h>
  11#include <asm/processor.h>
  12#include <asm-generic/sections.h>
  13
  14DECLARE_GLOBAL_DATA_PTR;
  15
  16__weak int arch_cpu_init_dm(void)
  17{
  18        return 0;
  19}
  20
  21static int x86_spl_init(void)
  22{
  23        /*
  24         * TODO(sjg@chromium.org): We use this area of RAM for the stack
  25         * and global_data in SPL. Once U-Boot starts up and releocates it
  26         * is not needed. We could make this a CONFIG option or perhaps
  27         * place it immediately below CONFIG_SYS_TEXT_BASE.
  28         */
  29        char *ptr = (char *)0x110000;
  30        int ret;
  31
  32        debug("%s starting\n", __func__);
  33        ret = spl_init();
  34        if (ret) {
  35                debug("%s: spl_init() failed\n", __func__);
  36                return ret;
  37        }
  38        ret = arch_cpu_init();
  39        if (ret) {
  40                debug("%s: arch_cpu_init() failed\n", __func__);
  41                return ret;
  42        }
  43        ret = arch_cpu_init_dm();
  44        if (ret) {
  45                debug("%s: arch_cpu_init_dm() failed\n", __func__);
  46                return ret;
  47        }
  48        preloader_console_init();
  49        ret = print_cpuinfo();
  50        if (ret) {
  51                debug("%s: print_cpuinfo() failed\n", __func__);
  52                return ret;
  53        }
  54        ret = dram_init();
  55        if (ret) {
  56                debug("%s: dram_init() failed\n", __func__);
  57                return ret;
  58        }
  59        memset(&__bss_start, 0, (ulong)&__bss_end - (ulong)&__bss_start);
  60
  61        /* TODO(sjg@chromium.org): Consider calling cpu_init_r() here */
  62        ret = interrupt_init();
  63        if (ret) {
  64                debug("%s: interrupt_init() failed\n", __func__);
  65                return ret;
  66        }
  67
  68        /*
  69         * The stack grows down from ptr. Put the global data at ptr. This
  70         * will only be used for SPL. Once SPL loads U-Boot proper it will
  71         * set up its own stack.
  72         */
  73        gd->new_gd = (struct global_data *)ptr;
  74        memcpy(gd->new_gd, gd, sizeof(*gd));
  75        arch_setup_gd(gd->new_gd);
  76        gd->start_addr_sp = (ulong)ptr;
  77
  78        /* Cache the SPI flash. Otherwise copying the code to RAM takes ages */
  79        ret = mtrr_add_request(MTRR_TYPE_WRBACK,
  80                               (1ULL << 32) - CONFIG_XIP_ROM_SIZE,
  81                               CONFIG_XIP_ROM_SIZE);
  82        if (ret) {
  83                debug("%s: SPI cache setup failed\n", __func__);
  84                return ret;
  85        }
  86
  87        return 0;
  88}
  89
  90void board_init_f(ulong flags)
  91{
  92        int ret;
  93
  94        ret = x86_spl_init();
  95        if (ret) {
  96                debug("Error %d\n", ret);
  97                hang();
  98        }
  99
 100        /* Uninit CAR and jump to board_init_f_r() */
 101        board_init_f_r_trampoline(gd->start_addr_sp);
 102}
 103
 104void board_init_f_r(void)
 105{
 106        init_cache_f_r();
 107        gd->flags &= ~GD_FLG_SERIAL_READY;
 108        debug("cache status %d\n", dcache_status());
 109        board_init_r(gd, 0);
 110}
 111
 112u32 spl_boot_device(void)
 113{
 114        return BOOT_DEVICE_BOARD;
 115}
 116
 117int spl_start_uboot(void)
 118{
 119        return 0;
 120}
 121
 122void spl_board_announce_boot_device(void)
 123{
 124        printf("SPI flash");
 125}
 126
 127static int spl_board_load_image(struct spl_image_info *spl_image,
 128                                struct spl_boot_device *bootdev)
 129{
 130        spl_image->size = CONFIG_SYS_MONITOR_LEN;
 131        spl_image->entry_point = CONFIG_SYS_TEXT_BASE;
 132        spl_image->load_addr = CONFIG_SYS_TEXT_BASE;
 133        spl_image->os = IH_OS_U_BOOT;
 134        spl_image->name = "U-Boot";
 135
 136        debug("Loading to %lx\n", spl_image->load_addr);
 137
 138        return 0;
 139}
 140SPL_LOAD_IMAGE_METHOD("SPI", 0, BOOT_DEVICE_BOARD, spl_board_load_image);
 141
 142int spl_spi_load_image(void)
 143{
 144        return -EPERM;
 145}
 146
 147void __noreturn jump_to_image_no_args(struct spl_image_info *spl_image)
 148{
 149        int ret;
 150
 151        printf("Jumping to 64-bit U-Boot: Note many features are missing\n");
 152        ret = cpu_jump_to_64bit_uboot(spl_image->entry_point);
 153        debug("ret=%d\n", ret);
 154        while (1)
 155                ;
 156}
 157