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

   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 * Copyright (c) 2018 Google, Inc
   4 */
   5
   6#include <common.h>
   7#include <debug_uart.h>
   8#include <dm.h>
   9#include <hang.h>
  10#include <image.h>
  11#include <init.h>
  12#include <log.h>
  13#include <spl.h>
  14#include <asm/cpu.h>
  15#include <asm/global_data.h>
  16#include <asm/mtrr.h>
  17#include <asm/processor.h>
  18#include <asm-generic/sections.h>
  19
  20DECLARE_GLOBAL_DATA_PTR;
  21
  22static int x86_tpl_init(void)
  23{
  24        int ret;
  25
  26        debug("%s starting\n", __func__);
  27        ret = x86_cpu_init_tpl();
  28        if (ret) {
  29                debug("%s: x86_cpu_init_tpl() failed\n", __func__);
  30                return ret;
  31        }
  32        ret = spl_init();
  33        if (ret) {
  34                debug("%s: spl_init() failed\n", __func__);
  35                return ret;
  36        }
  37        ret = arch_cpu_init();
  38        if (ret) {
  39                debug("%s: arch_cpu_init() failed\n", __func__);
  40                return ret;
  41        }
  42        preloader_console_init();
  43
  44        return 0;
  45}
  46
  47void board_init_f(ulong flags)
  48{
  49        int ret;
  50
  51        ret = x86_tpl_init();
  52        if (ret) {
  53                debug("Error %d\n", ret);
  54                panic("x86_tpl_init fail");
  55        }
  56
  57        /* Uninit CAR and jump to board_init_f_r() */
  58        board_init_r(gd, 0);
  59}
  60
  61void board_init_f_r(void)
  62{
  63        /* Not used since we never call board_init_f_r_trampoline() */
  64        while (1);
  65}
  66
  67u32 spl_boot_device(void)
  68{
  69        return IS_ENABLED(CONFIG_CHROMEOS_VBOOT) ? BOOT_DEVICE_CROS_VBOOT :
  70                BOOT_DEVICE_SPI_MMAP;
  71}
  72
  73int spl_start_uboot(void)
  74{
  75        return 0;
  76}
  77
  78void spl_board_announce_boot_device(void)
  79{
  80        printf("SPI flash");
  81}
  82
  83static int spl_board_load_image(struct spl_image_info *spl_image,
  84                                struct spl_boot_device *bootdev)
  85{
  86        spl_image->size = CONFIG_SYS_MONITOR_LEN;  /* We don't know SPL size */
  87        spl_image->entry_point = CONFIG_SPL_TEXT_BASE;
  88        spl_image->load_addr = CONFIG_SPL_TEXT_BASE;
  89        spl_image->os = IH_OS_U_BOOT;
  90        spl_image->name = "U-Boot";
  91
  92        debug("Loading to %lx\n", spl_image->load_addr);
  93
  94        return 0;
  95}
  96SPL_LOAD_IMAGE_METHOD("SPI", 5, BOOT_DEVICE_SPI_MMAP, spl_board_load_image);
  97
  98int spl_spi_load_image(void)
  99{
 100        return -EPERM;
 101}
 102
 103void __noreturn jump_to_image_no_args(struct spl_image_info *spl_image)
 104{
 105        debug("Jumping to %s at %lx\n", spl_phase_name(spl_next_phase()),
 106              (ulong)spl_image->entry_point);
 107#ifdef DEBUG
 108        print_buffer(spl_image->entry_point, (void *)spl_image->entry_point, 1,
 109                     0x20, 0);
 110#endif
 111        jump_to_spl(spl_image->entry_point);
 112        hang();
 113}
 114
 115void spl_board_init(void)
 116{
 117        preloader_console_init();
 118}
 119
 120#if !CONFIG_IS_ENABLED(PCI)
 121/*
 122 * This is a fake PCI bus for TPL when it doesn't have proper PCI. It is enough
 123 * to bind the devices on the PCI bus, some of which have early-regs properties
 124 * providing fixed BARs. Individual drivers program these BARs themselves so
 125 * that they can access the devices. The BARs are allocated statically in the
 126 * device tree.
 127 *
 128 * Once SPL is running it enables PCI properly, but does not auto-assign BARs
 129 * for devices, so the TPL BARs continue to be used. Once U-Boot starts it does
 130 * the auto allocation (after relocation).
 131 */
 132#if CONFIG_IS_ENABLED(OF_REAL)
 133static const struct udevice_id tpl_fake_pci_ids[] = {
 134        { .compatible = "pci-x86" },
 135        { }
 136};
 137#endif
 138
 139U_BOOT_DRIVER(pci_x86) = {
 140        .name   = "pci_x86",
 141        .id     = UCLASS_SIMPLE_BUS,
 142        .of_match = of_match_ptr(tpl_fake_pci_ids),
 143        DM_PHASE(tpl)
 144};
 145#endif
 146