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u-boot/common/board_r.c
Thierry Reding 1dfdd9ba4e ARM: Implement non-cached memory support 
Implement an API that can be used by drivers to allocate memory from a
pool that is mapped uncached. This is useful if drivers would otherwise
need to do extensive cache maintenance (or explicitly maintaining the
cache isn't safe).

The API is protected using the new CONFIG_SYS_NONCACHED_MEMORY setting.
Boards can set this to the size to be used for the non-cached area. The
area will typically be right below the malloc() area, but architectures
should take care of aligning the beginning and end of the area to honor
any mapping restrictions. Architectures must also ensure that mappings
established for this area do not overlap with the malloc() area (which
should remain cached for improved performance).

While the API is currently only implemented for ARM v7, it should be
generic enough to allow other architectures to implement it as well.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Warren <twarren@nvidia.com>
2014-12-18 13:19:21 -07:00

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/*
* 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>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
/* TODO: can we just include all these headers whether needed or not? */
#if defined(CONFIG_CMD_BEDBUG)
#include <bedbug/type.h>
#endif
#ifdef CONFIG_HAS_DATAFLASH
#include <dataflash.h>
#endif
#include <dm.h>
#include <environment.h>
#include <fdtdec.h>
#if defined(CONFIG_CMD_IDE)
#include <ide.h>
#endif
#include <initcall.h>
#ifdef CONFIG_PS2KBD
#include <keyboard.h>
#endif
#if defined(CONFIG_CMD_KGDB)
#include <kgdb.h>
#endif
#include <logbuff.h>
#include <malloc.h>
#ifdef CONFIG_BITBANGMII
#include <miiphy.h>
#endif
#include <mmc.h>
#include <nand.h>
#include <onenand_uboot.h>
#include <scsi.h>
#include <serial.h>
#include <spi.h>
#include <stdio_dev.h>
#include <trace.h>
#include <watchdog.h>
#ifdef CONFIG_ADDR_MAP
#include <asm/mmu.h>
#endif
#include <asm/sections.h>
#ifdef CONFIG_X86
#include <asm/init_helpers.h>
#endif
#include <dm/root.h>
#include <linux/compiler.h>
#include <linux/err.h>
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;
bootstage_mark_name(BOOTSTAGE_ID_START_UBOOT_R, "board_init_r");
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_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_EXTRA_ENV_RELOC
/*
* Some systems need to relocate the env_addr pointer early because the
* location it points to will get invalidated before env_relocate is
* called. One example is on systems that might use a L2 or L3 cache
* in SRAM mode and initialize that cache from SRAM mode back to being
* a cache in cpu_init_r.
*/
gd->env_addr += gd->relocaddr - CONFIG_SYS_MONITOR_BASE;
#endif
return 0;
}
static int initr_serial(void)
{
serial_initialize();
return 0;
}
#ifdef CONFIG_PPC
static int initr_trap(void)
{
/*
* Setup trap handlers
*/
trap_init(gd->relocaddr);
return 0;
}
#endif
#ifdef CONFIG_ADDR_MAP
static int initr_addr_map(void)
{
init_addr_map();
return 0;
}
#endif
#ifdef CONFIG_LOGBUFFER
unsigned long logbuffer_base(void)
{
return gd->ram_top - LOGBUFF_LEN;
}
static int initr_logbuffer(void)
{
logbuff_init_ptrs();
return 0;
}
#endif
#ifdef CONFIG_POST
static int initr_post_backlog(void)
{
post_output_backlog();
return 0;
}
#endif
#ifdef CONFIG_SYS_DELAYED_ICACHE
static int initr_icache_enable(void)
{
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)
{
pci_init();
return 0;
}
#endif
#ifdef CONFIG_WINBOND_83C553
static int initr_w83c553f(void)
{
/*
* Initialise the ISA bridge
*/
initialise_w83c553f();
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;
#ifdef CONFIG_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 */
malloc_start = gd->relocaddr - TOTAL_MALLOC_LEN;
mem_malloc_init((ulong)map_sysmem(malloc_start, TOTAL_MALLOC_LEN),
TOTAL_MALLOC_LEN);
return 0;
}
#ifdef CONFIG_SYS_NONCACHED_MEMORY
static int initr_noncached(void)
{
noncached_init();
return 0;
}
#endif
#ifdef CONFIG_DM
static int initr_dm(void)
{
/* Save the pre-reloc driver model and start a new one */
gd->dm_root_f = gd->dm_root;
gd->dm_root = NULL;
return dm_init_and_scan(false);
}
#endif
__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;
}
#if !defined(CONFIG_SYS_NO_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 (getenv_yesno("flashchecksum") == 1) {
printf(" CRC: %08X", crc32(0,
(const unsigned char *) CONFIG_SYS_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
#if defined(CONFIG_PPC) && !defined(CONFIG_DM_SPI)
static int initr_spi(void)
{
/* PPC does this here */
#ifdef CONFIG_SPI
#if !defined(CONFIG_ENV_IS_IN_EEPROM)
spi_init_f();
#endif
spi_init_r();
#endif
return 0;
}
#endif
#ifdef CONFIG_CMD_NAND
/* go init the NAND */
static int initr_nand(void)
{
puts("NAND: ");
nand_init();
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_GENERIC_MMC
static int initr_mmc(void)
{
puts("MMC: ");
mmc_initialize(gd->bd);
return 0;
}
#endif
#ifdef CONFIG_HAS_DATAFLASH
static int initr_dataflash(void)
{
AT91F_DataflashInit();
dataflash_print_info();
return 0;
}
#endif
/*
* Tell if it's OK to load the environment early in boot.
*
* If CONFIG_OF_CONFIG 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
set_default_env(NULL);
/* Initialize from environment */
load_addr = getenv_ulong("loadaddr", 16, load_addr);
#if defined(CONFIG_SYS_EXTBDINFO)
#if defined(CONFIG_405GP) || defined(CONFIG_405EP)
#if defined(CONFIG_I2CFAST)
/*
* set bi_iic_fast for linux taking environment variable
* "i2cfast" into account
*/
{
char *s = getenv("i2cfast");
if (s && ((*s == 'y') || (*s == 'Y'))) {
gd->bd->bi_iic_fast[0] = 1;
gd->bd->bi_iic_fast[1] = 1;
}
}
#endif /* CONFIG_I2CFAST */
#endif /* CONFIG_405GP, CONFIG_405EP */
#endif /* CONFIG_SYS_EXTBDINFO */
return 0;
}
#ifdef CONFIG_SC3
/* TODO: with new initcalls, move this into the driver */
extern void sc3_read_eeprom(void);
static int initr_sc3_read_eeprom(void)
{
sc3_read_eeprom();
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
#ifdef CONFIG_DISPLAY_BOARDINFO_LATE
static int show_model_r(void)
{
/* Put this here so it appears on the LCD, now it is ready */
# ifdef CONFIG_OF_CONTROL
const char *model;
model = (char *)fdt_getprop(gd->fdt_blob, 0, "model", NULL);
printf("Model: %s\n", model ? model : "<unknown>");
# else
checkboard();
# endif
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_getenv_enetaddr("ethaddr", bd->bi_enetaddr);
#ifdef CONFIG_HAS_ETH1
eth_getenv_enetaddr("eth1addr", bd->bi_enet1addr);
#endif
#ifdef CONFIG_HAS_ETH2
eth_getenv_enetaddr("eth2addr", bd->bi_enet2addr);
#endif
#ifdef CONFIG_HAS_ETH3
eth_getenv_enetaddr("eth3addr", bd->bi_enet3addr);
#endif
#ifdef CONFIG_HAS_ETH4
eth_getenv_enetaddr("eth4addr", bd->bi_enet4addr);
#endif
#ifdef CONFIG_HAS_ETH5
eth_getenv_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_STATUS_LED) && defined(STATUS_LED_BOOT)
static int initr_status_led(void)
{
status_led_set(STATUS_LED_BOOT, STATUS_LED_BLINKING);
return 0;
}
#endif
#if defined(CONFIG_CMD_SCSI)
static int initr_scsi(void)
{
puts("SCSI: ");
scsi_init();
return 0;
}
#endif
#if defined(CONFIG_CMD_DOC)
static int initr_doc(void)
{
puts("DOC: ");
doc_init();
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(gd->bd);
#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_CMD_PCMCIA) && !defined(CONFIG_CMD_IDE)
static int initr_pcmcia(void)
{
puts("PCMCIA:");
pcmcia_init();
return 0;
}
#endif
#if defined(CONFIG_CMD_IDE)
static int initr_ide(void)
{
#ifdef CONFIG_IDE_8xx_PCCARD
puts("PCMCIA:");
#else
puts("IDE: ");
#endif
#if defined(CONFIG_START_IDE)
if (board_start_ide())
ide_init();
#else
ide_init();
#endif
return 0;
}
#endif
#if defined(CONFIG_PRAM) || defined(CONFIG_LOGBUFFER)
/*
* 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];
# ifdef CONFIG_PRAM
pram = getenv_ulong("pram", 10, CONFIG_PRAM);
# endif
# if defined(CONFIG_LOGBUFFER) && !defined(CONFIG_ALT_LB_ADDR)
/* Also take the logbuffer into account (pram is in kB) */
pram += (LOGBUFF_LEN + LOGBUFF_OVERHEAD) / 1024;
# endif
sprintf(memsz, "%ldk", (long int) ((gd->ram_size / 1024) - pram));
setenv("mem", memsz);
return 0;
}
#endif
#ifdef CONFIG_CMD_BEDBUG
static int initr_bedbug(void)
{
bedbug_init();
return 0;
}
#endif
#ifdef CONFIG_PS2KBD
static int initr_kbd(void)
{
puts("PS/2: ");
kbd_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;
}
/*
* Over time we hope to remove these functions with code fragments and
* stub funtcions, and instead call the relevant function directly.
*
* We also 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?
*/
init_fnc_t init_sequence_r[] = {
initr_trace,
initr_reloc,
/* TODO: could x86/PPC have this also perhaps? */
#ifdef CONFIG_ARM
initr_caches,
#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,
#ifdef CONFIG_SYS_NONCACHED_MEMORY
initr_noncached,
#endif
bootstage_relocate,
#ifdef CONFIG_DM
initr_dm,
#endif
#ifdef CONFIG_ARM
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
stdio_init_tables,
initr_serial,
initr_announce,
INIT_FUNC_WATCHDOG_RESET
#ifdef CONFIG_PPC
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_LOGBUFFER
initr_logbuffer,
#endif
#ifdef CONFIG_POST
initr_post_backlog,
#endif
INIT_FUNC_WATCHDOG_RESET
#ifdef CONFIG_SYS_DELAYED_ICACHE
initr_icache_enable,
#endif
#if defined(CONFIG_PCI) && defined(CONFIG_SYS_EARLY_PCI_INIT)
/*
* Do early PCI configuration _before_ the flash gets initialised,
* because PCU ressources are crucial for flash access on some boards.
*/
initr_pci,
#endif
#ifdef CONFIG_WINBOND_83C553
initr_w83c553f,
#endif
#ifdef CONFIG_ARCH_EARLY_INIT_R
arch_early_init_r,
#endif
power_init_board,
#ifndef CONFIG_SYS_NO_FLASH
initr_flash,
#endif
INIT_FUNC_WATCHDOG_RESET
#if defined(CONFIG_PPC)
/* initialize higher level parts of CPU like time base and timers */
cpu_init_r,
#endif
#ifdef CONFIG_PPC
initr_spi,
#endif
#if defined(CONFIG_X86) && defined(CONFIG_SPI)
init_func_spi,
#endif
#ifdef CONFIG_CMD_NAND
initr_nand,
#endif
#ifdef CONFIG_CMD_ONENAND
initr_onenand,
#endif
#ifdef CONFIG_GENERIC_MMC
initr_mmc,
#endif
#ifdef CONFIG_HAS_DATAFLASH
initr_dataflash,
#endif
initr_env,
INIT_FUNC_WATCHDOG_RESET
initr_secondary_cpu,
#ifdef CONFIG_SC3
initr_sc3_read_eeprom,
#endif
#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
show_model_r,
#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_ARM)
initr_enable_interrupts,
#endif
#ifdef CONFIG_X86
timer_init, /* initialize timer */
#endif
#if defined(CONFIG_STATUS_LED) && defined(STATUS_LED_BOOT)
initr_status_led,
#endif
/* PPC has a udelay(20) here dating from 2002. Why? */
#ifdef CONFIG_CMD_NET
initr_ethaddr,
#endif
#ifdef CONFIG_BOARD_LATE_INIT
board_late_init,
#endif
#ifdef CONFIG_CMD_SCSI
INIT_FUNC_WATCHDOG_RESET
initr_scsi,
#endif
#ifdef CONFIG_CMD_DOC
INIT_FUNC_WATCHDOG_RESET
initr_doc,
#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_CMD_PCMCIA) && !defined(CONFIG_CMD_IDE)
initr_pcmcia,
#endif
#if defined(CONFIG_CMD_IDE)
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) || defined(CONFIG_LOGBUFFER)
initr_mem,
#endif
#ifdef CONFIG_PS2KBD
initr_kbd,
#endif
run_main_loop,
};
void board_init_r(gd_t *new_gd, ulong dest_addr)
{
#ifdef CONFIG_NEEDS_MANUAL_RELOC
int i;
#endif
#if !defined(CONFIG_X86) && !defined(CONFIG_ARM) && !defined(CONFIG_ARM64)
gd = new_gd;
#endif
#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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