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microblaze: Move architecture to use generic board init

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Compile code with -fPIC to get GOT. Do not build SPL
with fPIC because it increasing SPL size for nothing.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
This commit is contained in:
Michal Simek 2014-05-08 16:08:44 +02:00
parent 4dd097427a
commit e945f6dc28
12 changed files with 193 additions and 270 deletions
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5
arch/microblaze/config.mk
View File

@ -15,3 +15,8 @@ endif
CONFIG_STANDALONE_LOAD_ADDR ?= 0x80F00000
PLATFORM_CPPFLAGS += -ffixed-r31 -D__microblaze__
ifeq ($(CONFIG_SPL_BUILD),)
PLATFORM_CPPFLAGS += -fPIC
endif
__HAVE_ARCH_GENERIC_BOARD := y

103
arch/microblaze/cpu/start.S
View File

@ -150,6 +150,7 @@ clear_bss:
bnei r6, 2b
3: /* jumping to board_init */
#ifndef CONFIG_SPL_BUILD
or r5, r0, r0 /* flags - empty */
brai board_init_f
#else
addi r31, r0, CONFIG_SYS_SPL_MALLOC_END
@ -190,4 +191,106 @@ out16: bslli r3, r6, 8
rtsd r15, 8
or r0, r0, r0
.end out16
/*
* Relocate u-boot
*/
.text
.global relocate_code
.ent relocate_code
.align 2
relocate_code:
/*
* r5 - start_addr_sp
* r6 - new_gd
* r7 - reloc_addr
*/
addi r1, r5, 0 /* Start to use new SP */
addi r31, r6, 0 /* Start to use new GD */
add r23, r0, r7 /* Move reloc addr to r23 */
/* Relocate text and data - r12 temp value */
addi r21, r0, _start
addi r22, r0, __end - 4 /* Include BSS too */
1: lwi r12, r21, 0 /* Load u-boot data */
swi r12, r23, 0 /* Write zero to loc */
addi r21, r21, 4 /* Increment to next loc - origin code */
cmp r12, r21, r22 /* Check if we have reach the end */
bneid r12, 1b
addi r23, r23, 4 /* Increment to next loc - relocate code */
/* R23 points to the base address. */
add r23, r0, r7 /* Move reloc addr to r23 */
addi r24, r0, CONFIG_SYS_TEXT_BASE /* Get reloc offset */
rsub r23, r24, r23 /* keep - this is already here gd->reloc_off */
addik r6, r0, 0x2 /* BIG/LITTLE endian offset */
lwi r7, r0, 0x28
swi r6, r0, 0x28 /* used first unused MB vector */
lbui r10, r0, 0x28 /* used first unused MB vector */
swi r7, r0, 0x28
#ifdef CONFIG_SYS_USR_EXCEP
addik r6, r0, _exception_handler
addk r6, r6, r23 /* add offset */
sw r6, r1, r0
lhu r7, r1, r10
rsubi r8, r10, 0xa
sh r7, r0, r8
rsubi r8, r10, 0xe
sh r6, r0, r8
#endif
addik r6, r0, _hw_exception_handler
addk r6, r6, r23 /* add offset */
sw r6, r1, r0
lhu r7, r1, r10
rsubi r8, r10, 0x22
sh r7, r0, r8
rsubi r8, r10, 0x26
sh r6, r0, r8
addik r6, r0, _interrupt_handler
addk r6, r6, r23 /* add offset */
sw r6, r1, r0
lhu r7, r1, r10
rsubi r8, r10, 0x12
sh r7, r0, r8
rsubi r8, r10, 0x16
sh r6, r0, r8
/* Check if GOT exist */
addik r21, r23, _got_start
addik r22, r23, _got_end
cmpu r12, r21, r22
beqi r12, 2f /* No GOT table - jump over */
/* Skip last 3 entries plus 1 because of loop boundary below */
addik r22, r22, -0x10
/* Relocate the GOT. */
3: lw r12, r21, r0 /* Load entry */
addk r12, r12, r23 /* Add reloc offset */
sw r12, r21, r0 /* Save entry back */
cmpu r12, r21, r22 /* Check if this cross boundary */
bneid r12, 3b
addik r21. r21, 4
/* Update pointer to GOT */
mfs r20, rpc
addik r20, r20, _GLOBAL_OFFSET_TABLE_ + 8
addk r20, r20, r23
/* Flush caches to ensure consistency */
addik r5, r0, 0
addik r6, r0, XILINX_DCACHE_BYTE_SIZE
bralid r15, flush_cache
nop
2: addi r5, r31, 0 /* gd is initialized in board_r.c */
addi r6, r0, CONFIG_SYS_TEXT_BASE
addi r12, r23, board_init_r
bra r12 /* Jump to relocated code */
.end relocate_code
#endif

9
arch/microblaze/cpu/u-boot.lds
View File

@ -33,10 +33,19 @@ SECTIONS
__data_end = .;
}
.got ALIGN(4):
{
_got_start = .;
*(.got*)
. = ALIGN(4);
_got_end = .;
}
. = ALIGN(4);
.u_boot_list : {
KEEP(*(SORT(.u_boot_list*)));
}
__init_end = . ;
.bss ALIGN(0x4):
{

8
arch/microblaze/include/asm/config.h
View File

@ -7,4 +7,12 @@
#ifndef _ASM_CONFIG_H_
#define _ASM_CONFIG_H_
#ifndef CONFIG_SPL_BUILD
#define CONFIG_NEEDS_MANUAL_RELOC
#endif
#define CONFIG_NR_DRAM_BANKS 1
#define CONFIG_SYS_GENERIC_BOARD
#define CONFIG_SYS_GENERIC_GLOBAL_DATA
#endif

11
arch/microblaze/include/asm/u-boot.h
View File

@ -16,16 +16,7 @@
#ifndef _U_BOOT_H_
#define _U_BOOT_H_
typedef struct bd_info {
unsigned long bi_memstart; /* start of DRAM memory */
phys_size_t bi_memsize; /* size of DRAM memory in bytes */
unsigned long bi_flashstart; /* start of FLASH memory */
unsigned long bi_flashsize; /* size of FLASH memory */
unsigned long bi_flashoffset; /* reserved area for startup monitor */
unsigned long bi_sramstart; /* start of SRAM memory */
unsigned long bi_sramsize; /* size of SRAM memory */
ulong bi_boot_params; /* where this board expects params */
} bd_t;
#include <asm-generic/u-boot.h>
/* For image.h:image_check_target_arch() */
#define IH_ARCH_DEFAULT IH_ARCH_MICROBLAZE

1
arch/microblaze/lib/Makefile
View File

@ -5,6 +5,5 @@
# SPDX-License-Identifier: GPL-2.0+
#
obj-y += board.o
obj-$(CONFIG_CMD_BOOTM) += bootm.o
obj-y += muldi3.o

201
arch/microblaze/lib/board.c
View File

@ -1,201 +0,0 @@
/*
* (C) Copyright 2007 Michal Simek
* (C) Copyright 2004 Atmark Techno, Inc.
*
* Michal SIMEK <monstr@monstr.eu>
* Yasushi SHOJI <yashi@atmark-techno.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <command.h>
#include <malloc.h>
#include <version.h>
#include <watchdog.h>
#include <stdio_dev.h>
#include <serial.h>
#include <net.h>
#include <spi.h>
#include <linux/compiler.h>
#include <asm/processor.h>
#include <asm/microblaze_intc.h>
#include <fdtdec.h>
DECLARE_GLOBAL_DATA_PTR;
static int display_banner(void)
{
printf("\n\n%s\n\n", version_string);
return 0;
}
/*
* All attempts to come up with a "common" initialization sequence
* that works for all boards and architectures failed: some of the
* requirements are just _too_ different. To get rid of the resulting
* mess of board dependend #ifdef'ed code we now make the whole
* initialization sequence configurable to the user.
*
* The requirements for any new initalization function is simple: it
* receives a pointer to the "global data" structure as it's only
* argument, and returns an integer return code, where 0 means
* "continue" and != 0 means "fatal error, hang the system".
*/
typedef int (init_fnc_t) (void);
init_fnc_t *init_sequence[] = {
env_init,
#ifdef CONFIG_OF_CONTROL
fdtdec_check_fdt,
#endif
serial_init,
#ifndef CONFIG_SPL_BUILD
console_init_f,
#endif
display_banner,
#ifndef CONFIG_SPL_BUILD
interrupt_init,
timer_init,
#endif
NULL,
};
unsigned long monitor_flash_len;
void board_init_f(ulong not_used)
{
bd_t *bd;
init_fnc_t **init_fnc_ptr;
gd = (gd_t *)(CONFIG_SYS_SDRAM_BASE + CONFIG_SYS_GBL_DATA_OFFSET);
bd = (bd_t *)(CONFIG_SYS_SDRAM_BASE + CONFIG_SYS_GBL_DATA_OFFSET
- GENERATED_BD_INFO_SIZE);
#if defined(CONFIG_CMD_FLASH) && !defined(CONFIG_SPL_BUILD)
ulong flash_size = 0;
#endif
asm ("nop"); /* FIXME gd is not initialize - wait */
memset((void *)gd, 0, GENERATED_GBL_DATA_SIZE);
memset((void *)bd, 0, GENERATED_BD_INFO_SIZE);
gd->bd = bd;
gd->baudrate = CONFIG_BAUDRATE;
bd->bi_memstart = CONFIG_SYS_SDRAM_BASE;
bd->bi_memsize = CONFIG_SYS_SDRAM_SIZE;
gd->flags |= GD_FLG_RELOC; /* tell others: relocation done */
monitor_flash_len = __end - __text_start;
#ifdef CONFIG_OF_EMBED
/* Get a pointer to the FDT */
gd->fdt_blob = __dtb_dt_begin;
#elif defined CONFIG_OF_SEPARATE
/* FDT is at end of image */
gd->fdt_blob = (void *)__end;
#endif
#ifndef CONFIG_SPL_BUILD
/* Allow the early environment to override the fdt address */
gd->fdt_blob = (void *)getenv_ulong("fdtcontroladdr", 16,
(uintptr_t)gd->fdt_blob);
#endif
/*
* The Malloc area is immediately below the monitor copy in DRAM
* aka CONFIG_SYS_MONITOR_BASE - Note there is no need for reloc_off
* as our monitory code is run from SDRAM
*/
mem_malloc_init(CONFIG_SYS_MALLOC_BASE, CONFIG_SYS_MALLOC_LEN);
serial_initialize();
#ifdef CONFIG_XILINX_TB_WATCHDOG
hw_watchdog_init();
#endif
for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
WATCHDOG_RESET();
if ((*init_fnc_ptr) () != 0)
hang();
}
#ifndef CONFIG_SPL_BUILD
#ifdef CONFIG_OF_CONTROL
/* For now, put this check after the console is ready */
if (fdtdec_prepare_fdt())
panic("** No FDT - please see doc/README.fdt-control");
else
printf("DTB: 0x%x\n", (u32)gd->fdt_blob);
#endif
puts("SDRAM :\n");
printf("\t\tIcache:%s\n", icache_status() ? "ON" : "OFF");
printf("\t\tDcache:%s\n", dcache_status() ? "ON" : "OFF");
printf("\tU-Boot Start:0x%08x\n", CONFIG_SYS_TEXT_BASE);
#if defined(CONFIG_CMD_FLASH)
puts("Flash: ");
bd->bi_flashstart = CONFIG_SYS_FLASH_BASE;
flash_size = flash_init();
if (bd->bi_flashstart && flash_size > 0) {
# ifdef CONFIG_SYS_FLASH_CHECKSUM
print_size(flash_size, "");
/*
* 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 u8 *)bd->bi_flashstart,
flash_size)
);
}
putc('\n');
# else /* !CONFIG_SYS_FLASH_CHECKSUM */
print_size(flash_size, "\n");
# endif /* CONFIG_SYS_FLASH_CHECKSUM */
bd->bi_flashsize = flash_size;
bd->bi_flashoffset = bd->bi_flashstart + flash_size;
} else {
puts("Flash init FAILED");
bd->bi_flashstart = 0;
bd->bi_flashsize = 0;
bd->bi_flashoffset = 0;
}
#endif
#ifdef CONFIG_SPI
spi_init();
#endif
/* relocate environment function pointers etc. */
env_relocate();
/* Initialize stdio devices */
stdio_init();
/* Initialize the jump table for applications */
jumptable_init();
/* Initialize the console (after the relocation and devices init) */
console_init_r();
board_init();
/* Initialize from environment */
load_addr = getenv_ulong("loadaddr", 16, load_addr);
#if defined(CONFIG_CMD_NET)
printf("Net: ");
eth_initialize(gd->bd);
uchar enetaddr[6];
eth_getenv_enetaddr("ethaddr", enetaddr);
printf("MAC: %pM\n", enetaddr);
#endif
/* main_loop */
for (;;) {
WATCHDOG_RESET();
main_loop();
}
#endif /* CONFIG_SPL_BUILD */
}

46
board/xilinx/microblaze-generic/microblaze-generic.c
View File

@ -11,16 +11,62 @@
#include <common.h>
#include <config.h>
#include <fdtdec.h>
#include <netdev.h>
#include <asm/processor.h>
#include <asm/microblaze_intc.h>
#include <asm/asm.h>
#include <asm/gpio.h>
DECLARE_GLOBAL_DATA_PTR;
#ifdef CONFIG_XILINX_GPIO
static int reset_pin = -1;
#endif
#ifdef CONFIG_OF_CONTROL
ulong ram_base;
void dram_init_banksize(void)
{
gd->bd->bi_dram[0].start = ram_base;
gd->bd->bi_dram[0].size = get_effective_memsize();
}
int dram_init(void)
{
int node;
fdt_addr_t addr;
fdt_size_t size;
const void *blob = gd->fdt_blob;
node = fdt_node_offset_by_prop_value(blob, -1, "device_type",
"memory", 7);
if (node == -FDT_ERR_NOTFOUND) {
debug("DRAM: Can't get memory node\n");
return 1;
}
addr = fdtdec_get_addr_size(blob, node, "reg", &size);
if (addr == FDT_ADDR_T_NONE || size == 0) {
debug("DRAM: Can't get base address or size\n");
return 1;
}
ram_base = addr;
gd->ram_top = addr; /* In setup_dest_addr() is done +ram_size */
gd->ram_size = size;
return 0;
};
#else
int dram_init(void)
{
gd->ram_size = CONFIG_SYS_SDRAM_SIZE;
return 0;
}
#endif
int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
#ifdef CONFIG_XILINX_GPIO

4
common/board_f.c
View File

@ -262,7 +262,7 @@ static int zero_global_data(void)
static int setup_mon_len(void)
{
#ifdef __ARM__
#if defined(__ARM__) || defined(__MICROBLAZE__)
gd->mon_len = (ulong)&__bss_end - (ulong)_start;
#elif defined(CONFIG_SANDBOX)
gd->mon_len = (ulong)&_end - (ulong)_init;
@ -909,7 +909,7 @@ static init_fnc_t init_sequence_f[] = {
#endif
announce_dram_init,
/* TODO: unify all these dram functions? */
#if defined(CONFIG_ARM) || defined(CONFIG_X86)
#if defined(CONFIG_ARM) || defined(CONFIG_X86) || defined(CONFIG_MICROBLAZE)
dram_init, /* configure available RAM banks */
#endif
#if defined(CONFIG_MIPS) || defined(CONFIG_PPC)

2
common/board_r.c
View File

@ -813,7 +813,7 @@ init_fnc_t init_sequence_r[] = {
#if defined(CONFIG_ARM)
initr_enable_interrupts,
#endif
#ifdef CONFIG_X86
#if defined(CONFIG_X86) || defined(CONFIG_MICROBLAZE)
timer_init, /* initialize timer */
#endif
#if defined(CONFIG_STATUS_LED) && defined(STATUS_LED_BOOT)

13
common/cmd_bdinfo.c
View File

@ -183,8 +183,14 @@ int do_bdinfo(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
int do_bdinfo(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
bd_t *bd = gd->bd;
print_num("mem start ", (ulong)bd->bi_memstart);
print_lnum("mem size ", (u64)bd->bi_memsize);
int i;
for (i = 0; i < CONFIG_NR_DRAM_BANKS; ++i) {
print_num("DRAM bank", i);
print_num("-> start", bd->bi_dram[i].start);
print_num("-> size", bd->bi_dram[i].size);
}
print_num("flash start ", (ulong)bd->bi_flashstart);
print_num("flash size ", (ulong)bd->bi_flashsize);
print_num("flash offset ", (ulong)bd->bi_flashoffset);
@ -196,6 +202,9 @@ int do_bdinfo(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
print_eths();
#endif
printf("baudrate = %u bps\n", gd->baudrate);
print_num("relocaddr", gd->relocaddr);
print_num("reloc off", gd->reloc_off);
return 0;
}

60
include/configs/microblaze-generic.h
View File

@ -106,62 +106,16 @@
# define CONFIG_XILINX_TB_WATCHDOG
#endif
/*
* memory layout - Example
* CONFIG_SYS_TEXT_BASE = 0x1200_0000; defined in config.mk
* CONFIG_SYS_SRAM_BASE = 0x1000_0000;
* CONFIG_SYS_SRAM_SIZE = 0x0400_0000; 64MB
*
* CONFIG_SYS_MONITOR_LEN = 0x40000
* CONFIG_SYS_MALLOC_LEN = 3 * CONFIG_SYS_MONITOR_LEN = 0xC0000
*
* CONFIG_SYS_GBL_DATA_OFFSET = 0x1000_0000 + 0x0400_0000 - 0x1000 = 0x13FF_F000
* CONFIG_SYS_MONITOR_BASE = 0x13FF_F000 - CONFIG_SYS_MONITOR_LEN = 0x13FB_F000
* CONFIG_SYS_MALLOC_BASE = 0x13FB_F000 - CONFIG_SYS_MALLOC_LEN = 0x13EF_F000
*
* 0x1000_0000 CONFIG_SYS_SDRAM_BASE
* MEMTEST_AREA 64kB
* FREE
* 0x1200_0000 CONFIG_SYS_TEXT_BASE
* U-BOOT code
* 0x1202_0000
* FREE
*
* STACK
* 0x13EF_F000 CONFIG_SYS_MALLOC_BASE
* MALLOC_AREA 768kB Alloc
* 0x13FB_F000 CONFIG_SYS_MONITOR_BASE
* MONITOR_CODE 256kB Env
* 0x13FF_F000 CONFIG_SYS_GBL_DATA_OFFSET
* GLOBAL_DATA 4kB bd, gd
* 0x1400_0000 CONFIG_SYS_SDRAM_BASE + CONFIG_SYS_SDRAM_SIZE
*/
#ifndef CONFIG_OF_CONTROL
/* ddr sdram - main memory */
#define CONFIG_SYS_SDRAM_BASE XILINX_RAM_START
#define CONFIG_SYS_SDRAM_SIZE XILINX_RAM_SIZE
#define CONFIG_SYS_MEMTEST_START CONFIG_SYS_SDRAM_BASE
#define CONFIG_SYS_MEMTEST_END (CONFIG_SYS_SDRAM_BASE + 0x1000)
# define CONFIG_SYS_SDRAM_BASE XILINX_RAM_START
# define CONFIG_SYS_SDRAM_SIZE XILINX_RAM_SIZE
#endif
/* global pointer */
/* start of global data */
#define CONFIG_SYS_GBL_DATA_OFFSET \
(CONFIG_SYS_SDRAM_SIZE - GENERATED_GBL_DATA_SIZE)
#define CONFIG_SYS_MALLOC_LEN 0xC0000
/* monitor code */
#define SIZE 0x40000
#define CONFIG_SYS_MONITOR_LEN SIZE
#define CONFIG_SYS_MONITOR_BASE \
(CONFIG_SYS_SDRAM_BASE + CONFIG_SYS_GBL_DATA_OFFSET \
- CONFIG_SYS_MONITOR_LEN - GENERATED_BD_INFO_SIZE)
#define CONFIG_SYS_MONITOR_END \
(CONFIG_SYS_MONITOR_BASE + CONFIG_SYS_MONITOR_LEN)
#define CONFIG_SYS_MALLOC_LEN (SIZE * 3)
#define CONFIG_SYS_MALLOC_BASE \
(CONFIG_SYS_MONITOR_BASE - CONFIG_SYS_MALLOC_LEN)
/* stack */
#define CONFIG_SYS_INIT_SP_OFFSET CONFIG_SYS_MALLOC_BASE
/* Stack location before relocation */
#define CONFIG_SYS_INIT_SP_OFFSET CONFIG_SYS_TEXT_BASE
/*
* CFI flash memory layout - Example