// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (c) 2011 The Chromium OS Authors.
* (C) Copyright 2002-2006
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* (C) Copyright 2002
* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
* Marius Groeger <mgroeger@sysgo.de>
*/
#include <common.h>
#include <api.h>
#include <bootstage.h>
#include <cpu_func.h>
#include <exports.h>
#include <flash.h>
#include <hang.h>
#include <image.h>
#include <irq_func.h>
#include <log.h>
#include <net.h>
#include <asm/cache.h>
#include <asm/global_data.h>
#include <u-boot/crc.h>
/* TODO: can we just include all these headers whether needed or not? */
#if defined(
CONFIG_CMD_BEDBUG)
#include <bedbug/type.h>
#endif
#include <binman.h>
#include <command.h>
#include <console.h>
#include <dm.h>
#include <env.h>
#include <env_internal.h>
#include <fdtdec.h>
#include <ide.h>
#include <init.h>
#include <initcall.h>
#if defined(
CONFIG_CMD_KGDB)
#include <kgdb.h>
#endif
#include <irq_func.h>
#include <malloc.h>
#include <mapmem.h>
#ifdef CONFIG_BITBANGMII
#include <miiphy.h>
#endif
#include <mmc.h>
#include <mux.h>
#include <nand.h>
#include <of_live.h>
#include <onenand_uboot.h>
#include <pvblock.h>
#include <scsi.h>
#include <serial.h>
#include <status_led.h>
#include <stdio_dev.h>
#include <timer.h>
#include <trace.h>
#include <watchdog.h>
#ifdef CONFIG_XEN
#include <xen.h>
#endif
#ifdef CONFIG_ADDR_MAP
#include <asm/mmu.h>
#endif
#include <asm/sections.h>
#include <dm/root.h>
#include <linux/compiler.h>
#include <linux/err.h>
#include <efi_loader.h>
#include <wdt.h>
#if defined(
CONFIG_GPIO_HOG)
#include <asm/gpio.h>
#endif
#ifdef CONFIG_EFI_SETUP_EARLY
#include <efi_loader.h>
#endif
DECLARE_GLOBAL_DATA_PTR;
ulong monitor_flash_len;
__weak int board_flash_wp_on(void)
{
/*
* Most flashes can't be detected when write protection is enabled,
* so provide a way to let U-Boot gracefully ignore write protected
* devices.
*/
return 0;
}
__weak int cpu_secondary_init_r(void)
{
return 0;
}
static int initr_trace(void)
{
#ifdef CONFIG_TRACE
trace_init(gd->trace_buff,
CONFIG_TRACE_BUFFER_SIZE);
#endif
return 0;
}
static int initr_reloc(void)
{
/* tell others: relocation done */
gd->flags |= GD_FLG_RELOC | GD_FLG_FULL_MALLOC_INIT;
return 0;
}
#if defined(
CONFIG_ARM) || defined(
CONFIG_RISCV)
/*
* Some of these functions are needed purely because the functions they
* call return void. If we change them to return 0, these stubs can go away.
*/
static int initr_caches(void)
{
/* Enable caches */
enable_caches();
return 0;
}
#endif
__weak int fixup_cpu(void)
{
return 0;
}
static int initr_reloc_global_data(void)
{
#ifdef __ARM__
monitor_flash_len = _end - __image_copy_start;
#elif defined(
CONFIG_NDS32) || defined(
CONFIG_RISCV)
monitor_flash_len = (ulong)&_end - (ulong)&_start;
#elif !defined(
CONFIG_SANDBOX) && !defined(
CONFIG_NIOS2)
monitor_flash_len = (ulong)&__init_end - gd->relocaddr;
#endif
#if defined(
CONFIG_MPC85xx) || defined(
CONFIG_MPC86xx)
/*
* The gd->cpu pointer is set to an address in flash before relocation.
* We need to update it to point to the same CPU entry in RAM.
* TODO: why not just add gd->reloc_ofs?
*/
gd->arch.cpu += gd->relocaddr -
CONFIG_SYS_MONITOR_BASE;
/*
* If we didn't know the cpu mask & # cores, we can save them of
* now rather than 'computing' them constantly
*/
fixup_cpu();
#endif
#ifdef CONFIG_SYS_RELOC_GD_ENV_ADDR
/*
* Relocate the early env_addr pointer unless we know it is not inside
* the binary. Some systems need this and for the rest, it doesn't hurt.
*/
gd->env_addr += gd->reloc_off;
#endif
#ifdef CONFIG_OF_EMBED
/*
* The fdt_blob needs to be moved to new relocation address
* incase of FDT blob is embedded with in image
*/
gd->fdt_blob += gd->reloc_off;
#endif
#ifdef CONFIG_EFI_LOADER
/*
* On the ARM architecture gd is mapped to a fixed register (r9 or x18).
* As this register may be overwritten by an EFI payload we save it here
* and restore it on every callback entered.
*/
efi_save_gd();
efi_runtime_relocate(gd->relocaddr, NULL);
#endif
return 0;
}
__weak int arch_initr_trap(void)
{
return 0;
}
#ifdef CONFIG_ADDR_MAP
static int initr_addr_map(void)
{
init_addr_map();
return 0;
}
#endif
#if defined(
CONFIG_SYS_INIT_RAM_LOCK) && defined(
CONFIG_E500)
static int initr_unlock_ram_in_cache(void)
{
unlock_ram_in_cache(); /* it's time to unlock D-cache in e500 */
return 0;
}
#endif
static int initr_barrier(void)
{
#ifdef CONFIG_PPC
/* TODO: Can we not use dmb() macros for this? */
asm("sync ; isync");
#endif
return 0;
}
static int initr_malloc(void)
{
ulong malloc_start;
#if
CONFIG_VAL(SYS_MALLOC_F_LEN)
debug("Pre-reloc malloc() used %#lx bytes (%ld KB)\n", gd->malloc_ptr,
gd->malloc_ptr / 1024);
#endif
/* The malloc area is immediately below the monitor copy in DRAM */
/*
* This value MUST match the value of gd->start_addr_sp in board_f.c:
* reserve_noncached().
*/
malloc_start = gd->relocaddr - TOTAL_MALLOC_LEN;
mem_malloc_init((ulong)map_sysmem(malloc_start, TOTAL_MALLOC_LEN),
TOTAL_MALLOC_LEN);
return 0;
}
static int initr_of_live(void)
{
if (
CONFIG_IS_ENABLED(OF_LIVE)) {
int ret;
bootstage_start(BOOTSTAGE_ID_ACCUM_OF_LIVE, "of_live");
ret = of_live_build(gd->fdt_blob,
(struct device_node
**)gd_of_root_ptr());
bootstage_accum(BOOTSTAGE_ID_ACCUM_OF_LIVE);
if (ret)
return ret;
}
return 0;
}
#ifdef CONFIG_DM
static int initr_dm(void)
{
int ret;
/* Save the pre-reloc driver model and start a new one */
gd->dm_root_f = gd->dm_root;
gd->dm_root = NULL;
#ifdef CONFIG_TIMER
gd->timer = NULL;
#endif
bootstage_start(BOOTSTAGE_ID_ACCUM_DM_R, "dm_r");
ret = dm_init_and_scan(false);
bootstage_accum(BOOTSTAGE_ID_ACCUM_DM_R);
if (ret)
return ret;
return 0;
}
#endif
static int initr_dm_devices(void)
{
int ret;
if (IS_ENABLED(
CONFIG_TIMER_EARLY)) {
ret = dm_timer_init();
if (ret)
return ret;
}
if (IS_ENABLED(
CONFIG_MULTIPLEXER)) {
/*
* Initialize the multiplexer controls to their default state.
* This must be done early as other drivers may unknowingly
* rely on it.
*/
ret = dm_mux_init();
if (ret)
return ret;
}
return 0;
}
static int initr_bootstage(void)
{
bootstage_mark_name(BOOTSTAGE_ID_START_UBOOT_R, "board_init_r");
return 0;
}
__weak int power_init_board(void)
{
return 0;
}
static int initr_announce(void)
{
debug("Now running in RAM - U-Boot at: %08lx\n", gd->relocaddr);
return 0;
}
#ifdef CONFIG_NEEDS_MANUAL_RELOC
static int initr_manual_reloc_cmdtable(void)
{
fixup_cmdtable(ll_entry_start(struct cmd_tbl, cmd),
ll_entry_count(struct cmd_tbl, cmd));
return 0;
}
#endif
static int initr_binman(void)
{
int ret;
if (!
CONFIG_IS_ENABLED(BINMAN_FDT))
return 0;
ret = binman_init();
if (ret)
printf("binman_init failed:%d\n", ret);
return ret;
}
#if defined(
CONFIG_MTD_NOR_FLASH)
__weak int is_flash_available(void)
{
return 1;
}
static int initr_flash(void)
{
ulong flash_size = 0;
struct bd_info *bd = gd->bd;
if (!is_flash_available())
return 0;
puts("Flash: ");
if (board_flash_wp_on())
printf("Uninitialized - Write Protect On\n");
else
flash_size = flash_init();
print_size(flash_size, "");
#ifdef CONFIG_SYS_FLASH_CHECKSUM
/*
* Compute and print flash CRC if flashchecksum is set to 'y'
*
* NOTE: Maybe we should add some WATCHDOG_RESET()? XXX
*/
if (env_get_yesno("flashchecksum") == 1) {
const uchar *flash_base = (const uchar *)
CONFIG_SYS_FLASH_BASE;
printf(" CRC: %08X", crc32(0,
flash_base,
flash_size));
}
#endif /*
CONFIG_SYS_FLASH_CHECKSUM */
putc('\n');
/* update start of FLASH memory */
#ifdef CONFIG_SYS_FLASH_BASE
bd->bi_flashstart =
CONFIG_SYS_FLASH_BASE;
#endif
/* size of FLASH memory (final value) */
bd->bi_flashsize = flash_size;
#if defined(
CONFIG_SYS_UPDATE_FLASH_SIZE)
/* Make a update of the Memctrl. */
update_flash_size(flash_size);
#endif
#if defined(
CONFIG_OXC) || defined(
CONFIG_RMU)
/* flash mapped at end of memory map */
bd->bi_flashoffset =
CONFIG_SYS_TEXT_BASE + flash_size;
#elif
CONFIG_SYS_MONITOR_BASE ==
CONFIG_SYS_FLASH_BASE
bd->bi_flashoffset = monitor_flash_len; /* reserved area for monitor */
#endif
return 0;
}
#endif
#ifdef CONFIG_CMD_NAND
/* go init the NAND */
static int initr_nand(void)
{
puts("NAND: ");
nand_init();
printf("%lu MiB\n", nand_size() / 1024);
return 0;
}
#endif
#if defined(
CONFIG_CMD_ONENAND)
/* go init the NAND */
static int initr_onenand(void)
{
puts("NAND: ");
onenand_init();
return 0;
}
#endif
#ifdef CONFIG_MMC
static int initr_mmc(void)
{
puts("MMC: ");
mmc_initialize(gd->bd);
return 0;
}
#endif
#ifdef CONFIG_PVBLOCK
static int initr_pvblock(void)
{
puts("PVBLOCK: ");
pvblock_init();
return 0;
}
#endif
/*
* Tell if it's OK to load the environment early in boot.
*
* If
CONFIG_OF_CONTROL is defined, we'll check with the FDT to see
* if this is OK (defaulting to saying it's OK).
*
* NOTE: Loading the environment early can be a bad idea if security is
* important, since no verification is done on the environment.
*
* @return 0 if environment should not be loaded, !=0 if it is ok to load
*/
static int should_load_env(void)
{
if (IS_ENABLED(
CONFIG_OF_CONTROL))
return fdtdec_get_
config_int(gd->fdt_blob,
"load-environment", 1);
if (IS_ENABLED(
CONFIG_DELAY_ENVIRONMENT))
return 0;
return 1;
}
static int initr_env(void)
{
/* initialize environment */
if (should_load_env())
env_relocate();
else
env_set_default(NULL, 0);
env_import_fdt();
if (IS_ENABLED(
CONFIG_OF_CONTROL))
env_set_hex("fdtcontroladdr",
(unsigned long)map_to_sysmem(gd->fdt_blob));
/* Initialize from environment */
image_load_addr = env_get_ulong("loadaddr", 16, image_load_addr);
return 0;
}
#ifdef CONFIG_SYS_BOOTPARAMS_LEN
static int initr_malloc_bootparams(void)
{
gd->bd->bi_boot_params = (ulong)malloc(
CONFIG_SYS_BOOTPARAMS_LEN);
if (!gd->bd->bi_boot_params) {
puts("WARNING: Cannot allocate space for boot parameters\n");
return -ENOMEM;
}
return 0;
}
#endif
#ifdef CONFIG_CMD_NET
static int initr_ethaddr(void)
{
struct bd_info *bd = gd->bd;
/* kept around for legacy kernels only ... ignore the next section */
eth_env_get_enetaddr("ethaddr", bd->bi_enetaddr);
return 0;
}
#endif /*
CONFIG_CMD_NET */
#ifdef CONFIG_CMD_KGDB
static int initr_kgdb(void)
{
puts("KGDB: ");
kgdb_init();
return 0;
}
#endif
#if defined(
CONFIG_LED_STATUS)
static int initr_status_led(void)
{
#if defined(
CONFIG_LED_STATUS_BOOT)
status_led_set(
CONFIG_LED_STATUS_BOOT,
CONFIG_LED_STATUS_BLINKING);
#else
status_led_init();
#endif
return 0;
}
#endif
#if defined(
CONFIG_SCSI) && !defined(
CONFIG_DM_SCSI)
static int initr_scsi(void)
{
puts("SCSI: ");
scsi_init();
puts("\n");
return 0;
}
#endif
#ifdef CONFIG_CMD_NET
static int initr_net(void)
{
puts("Net: ");
eth_initialize();
#if defined(
CONFIG_RESET_PHY_R)
debug("Reset Ethernet PHY\n");
reset_phy();
#endif
return 0;
}
#endif
#ifdef CONFIG_POST
static int initr_post(void)
{
post_run(NULL, POST_RAM | post_bootmode_get(0));
return 0;
}
#endif
#if defined(
CONFIG_IDE) && !defined(
CONFIG_BLK)
static int initr_ide(void)
{
puts("IDE: ");
#if defined(
CONFIG_START_IDE)
if (board_start_ide())
ide_init();
#else
ide_init();
#endif
return 0;
}
#endif
#if defined(
CONFIG_PRAM)
/*
* Export available size of memory for Linux, taking into account the
* protected RAM at top of memory
*/
int initr_mem(void)
{
ulong pram = 0;
char memsz[32];
pram = env_get_ulong("pram", 10,
CONFIG_PRAM);
sprintf(memsz, "%ldk", (long int)((gd->ram_size / 1024) - pram));
env_set("mem", memsz);
return 0;
}
#endif
static int run_main_loop(void)
{
#ifdef CONFIG_SANDBOX
sandbox_main_loop_init();
#endif
/* main_loop() can return to retry autoboot, if so just run it again */
for (;;)
main_loop();
return 0;
}
/*
* We hope to remove most of the driver-related init and do it if/when
* the driver is later used.
*
* TODO: perhaps reset the watchdog in the initcall function after each call?
*/
static init_fnc_t init_sequence_r[] = {
initr_trace,
initr_reloc,
/* TODO: could x86/PPC have this also perhaps? */
#if defined(
CONFIG_ARM) || defined(
CONFIG_RISCV)
initr_caches,
/* Note: For Freescale LS2 SoCs, new MMU table is created in DDR.
* A temporary mapping of IFC high region is since removed,
* so environmental variables in NOR flash is not available
* until board_init() is called below to remap IFC to high
* region.
*/
#endif
initr_reloc_global_data,
#if defined(
CONFIG_SYS_INIT_RAM_LOCK) && defined(
CONFIG_E500)
initr_unlock_ram_in_cache,
#endif
initr_barrier,
initr_malloc,
log_init,
initr_bootstage, /* Needs malloc() but has its own timer */
#if defined(
CONFIG_CONSOLE_RECORD)
console_record_init,
#endif
#ifdef CONFIG_SYS_NONCACHED_MEMORY
noncached_init,
#endif
initr_of_live,
#ifdef CONFIG_DM
initr_dm,
#endif
#ifdef CONFIG_ADDR_MAP
initr_addr_map,
#endif
#if defined(
CONFIG_ARM) || defined(
CONFIG_NDS32) || defined(
CONFIG_RISCV) || \
defined(
CONFIG_SANDBOX)
board_init, /* Setup chipselects */
#endif
/*
* TODO: printing of the clock inforamtion of the board is now
* implemented as part of bdinfo command. Currently only support for
* davinci SOC's is added. Remove this check once all the board
* implement this.
*/
#ifdef CONFIG_CLOCKS
set_cpu_clk_info, /* Setup clock information */
#endif
#ifdef CONFIG_EFI_LOADER
efi_memory_init,
#endif
initr_binman,
#ifdef CONFIG_FSP_VERSION2
arch_fsp_init_r,
#endif
initr_dm_devices,
stdio_init_tables,
serial_initialize,
initr_announce,
#if
CONFIG_IS_ENABLED(WDT)
initr_watchdog,
#endif
INIT_FUNC_WATCHDOG_RESET
#if defined(
CONFIG_NEEDS_MANUAL_RELOC) && defined(
CONFIG_BLOCK_CACHE)
blkcache_init,
#endif
#ifdef CONFIG_NEEDS_MANUAL_RELOC
initr_manual_reloc_cmdtable,
#endif
arch_initr_trap,
#if defined(
CONFIG_BOARD_EARLY_INIT_R)
board_early_init_r,
#endif
INIT_FUNC_WATCHDOG_RESET
#ifdef CONFIG_POST
post_output_backlog,
#endif
INIT_FUNC_WATCHDOG_RESET
#if defined(
CONFIG_PCI_INIT_R) && defined(
CONFIG_SYS_EARLY_PCI_INIT)
/*
* Do early PCI
configuration _before_ the flash gets initialised,
* because PCU resources are crucial for flash access on some boards.
*/
pci_init,
#endif
#ifdef CONFIG_ARCH_EARLY_INIT_R
arch_early_init_r,
#endif
power_init_board,
#ifdef CONFIG_MTD_NOR_FLASH
initr_flash,
#endif
INIT_FUNC_WATCHDOG_RESET
#if defined(
CONFIG_PPC) || defined(
CONFIG_M68K) || defined(
CONFIG_X86)
/* initialize higher level parts of CPU like time base and timers */
cpu_init_r,
#endif
#ifdef CONFIG_CMD_NAND
initr_nand,
#endif
#ifdef CONFIG_CMD_ONENAND
initr_onenand,
#endif
#ifdef CONFIG_MMC
initr_mmc,
#endif
#ifdef CONFIG_XEN
xen_init,
#endif
#ifdef CONFIG_PVBLOCK
initr_pvblock,
#endif
initr_env,
#ifdef CONFIG_SYS_BOOTPARAMS_LEN
initr_malloc_bootparams,
#endif
INIT_FUNC_WATCHDOG_RESET
cpu_secondary_init_r,
#if defined(
CONFIG_ID_EEPROM) || defined(
CONFIG_SYS_I2C_MAC_OFFSET)
mac_read_from_eeprom,
#endif
INIT_FUNC_WATCHDOG_RESET
#if defined(
CONFIG_PCI_INIT_R) && !defined(
CONFIG_SYS_EARLY_PCI_INIT)
/*
* Do pci
configuration
*/
pci_init,
#endif
stdio_add_devices,
jumptable_init,
#ifdef CONFIG_API
api_init,
#endif
console_init_r, /* fully init console as a device */
#ifdef CONFIG_DISPLAY_BOARDINFO_LATE
console_announce_r,
show_board_info,
#endif
#ifdef CONFIG_ARCH_MISC_INIT
arch_misc_init, /* miscellaneous arch-dependent init */
#endif
#ifdef CONFIG_MISC_INIT_R
misc_init_r, /* miscellaneous platform-dependent init */
#endif
INIT_FUNC_WATCHDOG_RESET
#ifdef CONFIG_CMD_KGDB
initr_kgdb,
#endif
interrupt_init,
#if defined(
CONFIG_MICROBLAZE) || defined(
CONFIG_M68K)
timer_init, /* initialize timer */
#endif
#if defined(
CONFIG_LED_STATUS)
initr_status_led,
#endif
/* PPC has a udelay(20) here dating from 2002. Why? */
#ifdef CONFIG_CMD_NET
initr_ethaddr,
#endif
#if defined(
CONFIG_GPIO_HOG)
gpio_hog_probe_all,
#endif
#ifdef CONFIG_BOARD_LATE_INIT
board_late_init,
#endif
#if defined(
CONFIG_SCSI) && !defined(
CONFIG_DM_SCSI)
INIT_FUNC_WATCHDOG_RESET
initr_scsi,
#endif
#ifdef CONFIG_BITBANGMII
bb_miiphy_init,
#endif
#ifdef CONFIG_PCI_ENDPOINT
pci_ep_init,
#endif
#ifdef CONFIG_CMD_NET
INIT_FUNC_WATCHDOG_RESET
initr_net,
#endif
#ifdef CONFIG_POST
initr_post,
#endif
#if defined(
CONFIG_IDE) && !defined(
CONFIG_BLK)
initr_ide,
#endif
#ifdef CONFIG_LAST_STAGE_INIT
INIT_FUNC_WATCHDOG_RESET
/*
* Some parts can be only initialized if all others (like
* Interrupts) are up and running (i.e. the PC-style ISA
* keyboard).
*/
last_stage_init,
#endif
#ifdef CONFIG_CMD_BEDBUG
INIT_FUNC_WATCHDOG_RESET
bedbug_init,
#endif
#if defined(
CONFIG_PRAM)
initr_mem,
#endif
#ifdef CONFIG_EFI_SETUP_EARLY
(init_fnc_t)efi_init_obj_list,
#endif
run_main_loop,
};
void board_init_r(gd_t *new_gd, ulong dest_addr)
{
/*
* Set up the new global data pointer. So far only x86 does this
* here.
* TODO(sjg@chromium.org): Consider doing this for all archs, or
* dropping the new_gd parameter.
*/
#if
CONFIG_IS_ENABLED(X86_64)
arch_setup_gd(new_gd);
#endif
#ifdef CONFIG_NEEDS_MANUAL_RELOC
int i;
#endif
#if !defined(
CONFIG_X86) && !defined(
CONFIG_ARM) && !defined(
CONFIG_ARM64)
gd = new_gd;
#endif
gd->flags &= ~GD_FLG_LOG_READY;
#ifdef CONFIG_NEEDS_MANUAL_RELOC
for (i = 0; i < ARRAY_SIZE(init_sequence_r); i++)
init_sequence_r[i] += gd->reloc_off;
#endif
if (initcall_run_list(init_sequence_r))
hang();
/* NOTREACHED - run_main_loop() does not return */
hang();
}
本文深入探讨了Linux内核中配置宏的作用及如何影响编译过程，特别是通过理解`#ifdef CONFIG_PROC_FS`的机制，展示了如何在特定配置下选择性地编译内核模块。详细解析了配置宏的生成过程以及它们如何通过编译命令影响源代码的编译。
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