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u-boot/common/board_r.c
Stephen Warren 5e0404ff85 board_f: fix noncached reservation calculation 
The current code in reserve_noncached() has two issues:

1) The first update of gd->start_addr_sp always rounds down to a section
start. However, the equivalent calculation in cache.c:noncached_init()
always first rounds up to a section start, then subtracts a section size.
These two calculations differ if the initial value is already rounded to
section alignment.

2) The second update of gd->start_addr_sp subtracts exactly
CONFIG_SYS_NONCACHED_MEMORY, whereas the equivalent calculation in
cache.c:noncached_init() rounds the noncached size up to section
alignment before subtracting it. The two calculations differ if the
noncached region size is not a multiple of the MMU section size.

In practice, one/both of those issues causes a practical problem on
Jetson TX1; U-Boot triggers a synchronous abort during initialization,
likely due to overlapping use of some memory region.

This change fixes both these issues by duplicating the exact calculations
from noncached_init() into reserve_noncached().

However, this fix assumes that gd->start_addr_sp on entry to
reserve_noncached() exactly matches mem_malloc_start on entry to
noncached_init(). I haven't traced the code to see whether it absolutely
guarantees this in all (or indeed any!) cases. Consequently, I added some
comments in the hope that this condition will continue to be true.

Fixes: 5f7adb5b1c ("board_f: reserve noncached space below malloc area")
Cc: Vikas Manocha <vikas.manocha@st.com>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
2019-08-30 14:17:11 -04:00

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// 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>
/* TODO: can we just include all these headers whether needed or not? */
#if defined(CONFIG_CMD_BEDBUG)
#include <bedbug/type.h>
#endif
#include <command.h>
#include <console.h>
#include <dm.h>
#include <env.h>
#include <env_internal.h>
#include <fdtdec.h>
#include <ide.h>
#include <initcall.h>
#if defined(CONFIG_CMD_KGDB)
#include <kgdb.h>
#endif
#include <malloc.h>
#include <mapmem.h>
#ifdef CONFIG_BITBANGMII
#include <miiphy.h>
#endif
#include <mmc.h>
#include <nand.h>
#include <of_live.h>
#include <onenand_uboot.h>
#include <scsi.h>
#include <serial.h>
#include <stdio_dev.h>
#include <timer.h>
#include <trace.h>
#include <watchdog.h>
#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
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 void cpu_secondary_init_r(void)
{
}
static int initr_secondary_cpu(void)
{
/*
* after non-volatile devices & environment is setup and cpu code have
* another round to deal with any initialization that might require
* full access to the environment or loading of some image (firmware)
* from a non-volatile device
*/
/* TODO: maybe define this for all archs? */
cpu_secondary_init_r();
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;
}
#ifdef CONFIG_ARM
/*
* 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
#if !defined(CONFIG_ENV_ADDR) || defined(ENV_IS_EMBEDDED)
/*
* 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;
}
static int initr_serial(void)
{
serial_initialize();
return 0;
}
#if defined(CONFIG_PPC) || defined(CONFIG_M68K) || defined(CONFIG_MIPS)
static int initr_trap(void)
{
/*
* Setup trap handlers
*/
#if defined(CONFIG_PPC)
trap_init(gd->relocaddr);
#else
trap_init(CONFIG_SYS_SDRAM_BASE);
#endif
return 0;
}
#endif
#ifdef CONFIG_ADDR_MAP
static int initr_addr_map(void)
{
init_addr_map();
return 0;
}
#endif
#ifdef CONFIG_POST
static int initr_post_backlog(void)
{
post_output_backlog();
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
#ifdef CONFIG_PCI
static int initr_pci(void)
{
#ifndef CONFIG_DM_PCI
pci_init();
#endif
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_console_record(void)
{
#if defined(CONFIG_CONSOLE_RECORD)
return console_record_init();
#else
return 0;
#endif
}
#ifdef CONFIG_SYS_NONCACHED_MEMORY
static int initr_noncached(void)
{
noncached_init();
return 0;
}
#endif
#ifdef CONFIG_OF_LIVE
static int initr_of_live(void)
{
int ret;
bootstage_start(BOOTSTAGE_ID_ACCUM_OF_LIVE, "of_live");
ret = of_live_build(gd->fdt_blob, (struct device_node **)&gd->of_root);
bootstage_accum(BOOTSTAGE_ID_ACCUM_OF_LIVE);
if (ret)
return ret;
return 0;
}
#endif
#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(BOOTSTATE_ID_ACCUM_DM_R, "dm_r");
ret = dm_init_and_scan(false);
bootstage_accum(BOOTSTATE_ID_ACCUM_DM_R);
if (ret)
return ret;
#ifdef CONFIG_TIMER_EARLY
ret = dm_timer_init();
if (ret)
return ret;
#endif
return 0;
}
#endif
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(cmd_tbl_t, cmd),
ll_entry_count(cmd_tbl_t, cmd));
return 0;
}
#endif
#if defined(CONFIG_MTD_NOR_FLASH)
static int initr_flash(void)
{
ulong flash_size = 0;
bd_t *bd = gd->bd;
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
/*
* 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)
{
#ifdef CONFIG_OF_CONTROL
return fdtdec_get_config_int(gd->fdt_blob, "load-environment", 1);
#elif defined CONFIG_DELAY_ENVIRONMENT
return 0;
#else
return 1;
#endif
}
static int initr_env(void)
{
/* initialize environment */
if (should_load_env())
env_relocate();
else
env_set_default(NULL, 0);
#ifdef CONFIG_OF_CONTROL
env_set_hex("fdtcontroladdr",
(unsigned long)map_to_sysmem(gd->fdt_blob));
#endif
/* Initialize from environment */
load_addr = env_get_ulong("loadaddr", 16, 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
static int initr_jumptable(void)
{
jumptable_init();
return 0;
}
#if defined(CONFIG_API)
static int initr_api(void)
{
/* Initialize API */
api_init();
return 0;
}
#endif
/* enable exceptions */
#ifdef CONFIG_ARM
static int initr_enable_interrupts(void)
{
enable_interrupts();
return 0;
}
#endif
#ifdef CONFIG_CMD_NET
static int initr_ethaddr(void)
{
bd_t *bd = gd->bd;
/* kept around for legacy kernels only ... ignore the next section */
eth_env_get_enetaddr("ethaddr", bd->bi_enetaddr);
#ifdef CONFIG_HAS_ETH1
eth_env_get_enetaddr("eth1addr", bd->bi_enet1addr);
#endif
#ifdef CONFIG_HAS_ETH2
eth_env_get_enetaddr("eth2addr", bd->bi_enet2addr);
#endif
#ifdef CONFIG_HAS_ETH3
eth_env_get_enetaddr("eth3addr", bd->bi_enet3addr);
#endif
#ifdef CONFIG_HAS_ETH4
eth_env_get_enetaddr("eth4addr", bd->bi_enet4addr);
#endif
#ifdef CONFIG_HAS_ETH5
eth_env_get_enetaddr("eth5addr", bd->bi_enet5addr);
#endif
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_BITBANGMII
static int initr_bbmii(void)
{
bb_miiphy_init();
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
#ifdef CONFIG_CMD_BEDBUG
static int initr_bedbug(void)
{
bedbug_init();
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? */
#ifdef CONFIG_ARM
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 */
initr_console_record,
#ifdef CONFIG_SYS_NONCACHED_MEMORY
initr_noncached,
#endif
bootstage_relocate,
#ifdef CONFIG_OF_LIVE
initr_of_live,
#endif
#ifdef CONFIG_DM
initr_dm,
#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
stdio_init_tables,
initr_serial,
initr_announce,
#if CONFIG_IS_ENABLED(WDT)
initr_watchdog,
#endif
INIT_FUNC_WATCHDOG_RESET
#ifdef CONFIG_NEEDS_MANUAL_RELOC
initr_manual_reloc_cmdtable,
#endif
#if defined(CONFIG_PPC) || defined(CONFIG_M68K) || defined(CONFIG_MIPS)
initr_trap,
#endif
#ifdef CONFIG_ADDR_MAP
initr_addr_map,
#endif
#if defined(CONFIG_BOARD_EARLY_INIT_R)
board_early_init_r,
#endif
INIT_FUNC_WATCHDOG_RESET
#ifdef CONFIG_POST
initr_post_backlog,
#endif
INIT_FUNC_WATCHDOG_RESET
#if defined(CONFIG_PCI) && 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.
*/
initr_pci,
#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
initr_env,
#ifdef CONFIG_SYS_BOOTPARAMS_LEN
initr_malloc_bootparams,
#endif
INIT_FUNC_WATCHDOG_RESET
initr_secondary_cpu,
#if defined(CONFIG_ID_EEPROM) || defined(CONFIG_SYS_I2C_MAC_OFFSET)
mac_read_from_eeprom,
#endif
INIT_FUNC_WATCHDOG_RESET
#if defined(CONFIG_PCI) && !defined(CONFIG_SYS_EARLY_PCI_INIT)
/*
* Do pci configuration
*/
initr_pci,
#endif
stdio_add_devices,
initr_jumptable,
#ifdef CONFIG_API
initr_api,
#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,
#ifdef CONFIG_ARM
initr_enable_interrupts,
#endif
#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
initr_bbmii,
#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
initr_bedbug,
#endif
#if defined(CONFIG_PRAM)
initr_mem,
#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();
}
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