// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (c) 2011 The Chromium OS Authors.
* (C) Copyright 2002-2006
* Wolfgang Denk, DENX Software Eng
ineer
ing, wd@denx.de.
*
* (C) Copyright 2002
* Sysgo Real-Time Solutions, GmbH <www.el
inos.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 def
ined(CONFIG_CMD_BEDBUG)
#
include <bedbug/type.h>
#endif
#
include <b
inman.h>
#
include <comm
and.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 def
ined(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 <n
and.h>
#
include <of_live.h>
#
include <onen
and_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 <l
inux/compiler.h>
#
include <l
inux/err.h>
#
include <efi_loader.h>
#
include <wdt.h>
#if def
ined(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 def
ined(CONFIG_ARM) || def
ined(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 def
ined(CONFIG_NDS32) || def
ined(CONFIG_RISCV)
monitor_flash_len = (ulong)&_end - (ulong)&_start;
#elif !def
ined(CONFIG_S
ANDBOX) && !def
ined(CONFIG_NIOS2)
monitor_flash_len = (ulong)&__
init_end - gd->relocaddr;
#endif
#if def
ined(CONFIG_MPC85xx) || def
ined(CONFIG_MPC86xx)
/*
* The gd->cpu po
inter is set to an address
in flash before relocation.
* We need to update it to po
int 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 'comput
ing' them constantly
*/
fixup_cpu();
#endif
#ifdef CONFIG_SYS_RELOC_GD_ENV_ADDR
/*
* Relocate the early env_addr po
inter unless we know it is not
inside
* the b
inary. 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 def
ined(CONFIG_SYS_
INIT_RAM_LOCK) && def
ined(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 unknow
ingly
* 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 runn
ing
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_b
inman(void)
{
int ret;
if (!CONFIG_IS_ENABLED(B
INMAN_FDT))
return 0;
ret = b
inman_
init();
if (ret)
pr
intf("b
inman_
init failed:%d\n", ret);
return ret;
}
#if def
ined(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())
pr
intf("Un
initialized - Write Protect On\n");
else
flash_size = flash_
init();
pr
int_size(flash_size, "");
#ifdef CONFIG_SYS_FLASH_CHECKSUM
/*
* Compute
and pr
int 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;
pr
intf(" 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 (f
inal value) */
bd->bi_flashsize = flash_size;
#if def
ined(CONFIG_SYS_UPDATE_FLASH_SIZE)
/* Make a update of the Memctrl. */
update_flash_size(flash_size);
#endif
#if def
ined(CONFIG_OXC) || def
ined(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_N
AND
/* go
init the N
AND */
static
int
initr_n
and(void)
{
puts("N
AND: ");
n
and_
init();
pr
intf("%lu MiB\n", n
and_size() / 1024);
return 0;
}
#endif
#if def
ined(CONFIG_CMD_ONEN
AND)
/* go
init the N
AND */
static
int
initr_onen
and(void)
{
puts("N
AND: ");
onen
and_
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 def
ined, we'll check with the FDT to see
* if this is OK (default
ing to say
ing it's OK).
*
* NOTE: Load
ing the environment early can be a bad idea if security is
* important, s
ince 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("WARN
ING: 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 def
ined(CONFIG_LED_STATUS)
static
int
initr_status_led(void)
{
#if def
ined(CONFIG_LED_STATUS_BOOT)
status_led_set(CONFIG_LED_STATUS_BOOT, CONFIG_LED_STATUS_BL
INK
ING);
#else
status_led_
init();
#endif
return 0;
}
#endif
#if def
ined(CONFIG_SCSI) && !def
ined(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 def
ined(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 def
ined(CONFIG_IDE) && !def
ined(CONFIG_BLK)
static
int
initr_ide(void)
{
puts("IDE: ");
#if def
ined(CONFIG_START_IDE)
if (board_start_ide())
ide_
init();
#else
ide_
init();
#endif
return 0;
}
#endif
#if def
ined(CONFIG_PRAM)
/*
* Export available size of memory for L
inux, tak
ing
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);
spr
intf(memsz, "%ldk", (long
int)((gd->ram_size / 1024) - pram));
env_set("mem", memsz);
return 0;
}
#endif
static
int run_ma
in_loop(void)
{
#ifdef CONFIG_S
ANDBOX
s
andbox_ma
in_loop_
init();
#endif
/* ma
in_loop() can return to retry autoboot, if so just run it aga
in */
for (;;)
ma
in_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 def
ined(CONFIG_ARM) || def
ined(CONFIG_RISCV)
initr_caches,
/* Note: For Freescale LS2 SoCs, new MMU table is created
in DDR.
* A temporary mapp
ing of IFC high region is s
ince 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 def
ined(CONFIG_SYS_
INIT_RAM_LOCK) && def
ined(CONFIG_E500)
initr_unlock_ram_
in_cache,
#endif
initr_barrier,
initr_malloc,
log_
init,
initr_bootstage, /* Needs malloc() but has its own timer */
#if def
ined(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 def
ined(CONFIG_ARM) || def
ined(CONFIG_NDS32) || def
ined(CONFIG_RISCV) || \
def
ined(CONFIG_S
ANDBOX)
board_
init, /* Setup chipselects */
#endif
/*
* TODO: pr
int
ing of the clock
inforamtion of the board is now
* implemented as part of bd
info comm
and. Currently only support for
* dav
inci 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_b
inman,
#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 def
ined(CONFIG_NEEDS_MANUAL_RELOC) && def
ined(CONFIG_BLOCK_CACHE)
blkcache_
init,
#endif
#ifdef CONFIG_NEEDS_MANUAL_RELOC
initr_manual_reloc_cmdtable,
#endif
arch_
initr_trap,
#if def
ined(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 def
ined(CONFIG_PCI_
INIT_R) && def
ined(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 def
ined(CONFIG_PPC) || def
ined(CONFIG_M68K) || def
ined(CONFIG_X86)
/*
initialize higher level parts of CPU like time base
and timers */
cpu_
init_r,
#endif
#ifdef CONFIG_CMD_N
AND
initr_n
and,
#endif
#ifdef CONFIG_CMD_ONEN
AND
initr_onen
and,
#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 def
ined(CONFIG_ID_EEPROM) || def
ined(CONFIG_SYS_I2C_MAC_OFFSET)
mac_read_from_eeprom,
#endif
INIT_FUNC_WATCHDOG_RESET
#if def
ined(CONFIG_PCI_
INIT_R) && !def
ined(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_BOARD
INFO_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 def
ined(CONFIG_MICROBLAZE) || def
ined(CONFIG_M68K)
timer_
init, /*
initialize timer */
#endif
#if def
ined(CONFIG_LED_STATUS)
initr_status_led,
#endif
/* PPC has a udelay(20) here dat
ing from 2002. Why? */
#ifdef CONFIG_CMD_NET
initr_ethaddr,
#endif
#if def
ined(CONFIG_GPIO_HOG)
gpio_hog_probe_all,
#endif
#ifdef CONFIG_BOARD_LATE_
INIT
board_late_
init,
#endif
#if def
ined(CONFIG_SCSI) && !def
ined(CONFIG_DM_SCSI)
INIT_FUNC_WATCHDOG_RESET
initr_scsi,
#endif
#ifdef CONFIG_BITBANGMII
bb_miiphy_
init,
#endif
#ifdef CONFIG_PCI_ENDPO
INT
pci_ep_
init,
#endif
#ifdef CONFIG_CMD_NET
INIT_FUNC_WATCHDOG_RESET
initr_net,
#endif
#ifdef CONFIG_POST
initr_post,
#endif
#if def
ined(CONFIG_IDE) && !def
ined(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 runn
ing (i.e. the PC-style ISA
* keyboard).
*/
last_stage_
init,
#endif
#ifdef CONFIG_CMD_BEDBUG
INIT_FUNC_WATCHDOG_RESET
bedbug_
init,
#endif
#if def
ined(CONFIG_PRAM)
initr_mem,
#endif
#ifdef CONFIG_EFI_SETUP_EARLY
(
init_fnc_t)efi_
init_obj_list,
#endif
run_ma
in_loop,
};
void board_
init_r(gd_t *new_gd, ulong dest_addr)
{
/*
* Set up the new global data po
inter. So far only x86 does this
* here.
* TODO(sjg@chromium.org): Consider do
ing this for all archs, or
* dropp
ing 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 !def
ined(CONFIG_X86) && !def
ined(CONFIG_ARM) && !def
ined(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_ma
in_loop() does not return */
hang();
}
本文深入探讨了C语言程序中的条件预处理指令，包括#if, #ifdef等用法及其作用，通过示例代码展示如何在编译阶段进行条件编译。
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