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Blackfin: move gd/bd to bss by default 

We don't need these setup manually, so let the bss do the rest.  On
Blackfin systems, we clear the bss before executing any C code that
would use these, so this should be fine.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
This commit is contained in:
Mike Frysinger 2012-02-29 22:48:10 -05:00
parent 33e7e60c77
commit a4932d7877
2 changed files with 43 additions and 23 deletions
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8
arch/blackfin/include/asm/config.h
View File

@ -109,14 +109,8 @@
#ifndef CONFIG_SYS_MALLOC_BASE
# define CONFIG_SYS_MALLOC_BASE (CONFIG_SYS_MONITOR_BASE - CONFIG_SYS_MALLOC_LEN)
#endif
#ifndef CONFIG_SYS_GBL_DATA_ADDR
# define CONFIG_SYS_GBL_DATA_ADDR (CONFIG_SYS_MALLOC_BASE - GENERATED_GBL_DATA_SIZE)
#endif
#ifndef CONFIG_SYS_BD_INFO_ADDR
# define CONFIG_SYS_BD_INFO_ADDR (CONFIG_SYS_GBL_DATA_ADDR - GENERATED_BD_INFO_SIZE)
#endif
#ifndef CONFIG_STACKBASE
# define CONFIG_STACKBASE (CONFIG_SYS_BD_INFO_ADDR - 4)
# define CONFIG_STACKBASE (CONFIG_SYS_MALLOC_BASE - 4)
#endif
#ifndef CONFIG_SYS_MEMTEST_START
# define CONFIG_SYS_MEMTEST_START 0

58
arch/blackfin/lib/board.c
View File

@ -181,6 +181,46 @@ void init_cplbtables(void)
}
}
static int global_board_data_init(void)
{
#ifndef CONFIG_SYS_GBL_DATA_ADDR
# define CONFIG_SYS_GBL_DATA_ADDR 0
#endif
#ifndef CONFIG_SYS_BD_INFO_ADDR
# define CONFIG_SYS_BD_INFO_ADDR 0
#endif
bd_t *bd;
if (CONFIG_SYS_GBL_DATA_ADDR) {
gd = (gd_t *) (CONFIG_SYS_GBL_DATA_ADDR);
memset((void *)gd, 0, GENERATED_GBL_DATA_SIZE);
} else {
static gd_t _bfin_gd;
gd = &_bfin_gd;
}
if (CONFIG_SYS_BD_INFO_ADDR) {
bd = (bd_t *) (CONFIG_SYS_BD_INFO_ADDR);
memset(bd, 0, GENERATED_BD_INFO_SIZE);
} else {
static bd_t _bfin_bd;
bd = &_bfin_bd;
}
gd->bd = bd;
bd->bi_r_version = version_string;
bd->bi_cpu = MK_STR(CONFIG_BFIN_CPU);
bd->bi_board_name = BFIN_BOARD_NAME;
bd->bi_vco = get_vco();
bd->bi_cclk = get_cclk();
bd->bi_sclk = get_sclk();
bd->bi_memstart = CONFIG_SYS_SDRAM_BASE;
bd->bi_memsize = CONFIG_SYS_MAX_RAM_SIZE;
return 0;
}
/*
* All attempts to come up with a "common" initialization sequence
* that works for all boards and architectures failed: some of the
@ -201,7 +241,6 @@ extern int timer_init(void);
void board_init_f(ulong bootflag)
{
bd_t *bd;
char buf[32];
#ifdef CONFIG_BOARD_EARLY_INIT_F
@ -234,21 +273,8 @@ void board_init_f(ulong bootflag)
hang();
#endif
serial_early_puts("Init global data\n");
gd = (gd_t *) (CONFIG_SYS_GBL_DATA_ADDR);
memset((void *)gd, 0, GENERATED_GBL_DATA_SIZE);
bd = (bd_t *) (CONFIG_SYS_BD_INFO_ADDR);
gd->bd = bd;
memset((void *)bd, 0, GENERATED_BD_INFO_SIZE);
bd->bi_r_version = version_string;
bd->bi_cpu = MK_STR(CONFIG_BFIN_CPU);
bd->bi_board_name = BFIN_BOARD_NAME;
bd->bi_vco = get_vco();
bd->bi_cclk = get_cclk();
bd->bi_sclk = get_sclk();
bd->bi_memstart = CONFIG_SYS_SDRAM_BASE;
bd->bi_memsize = CONFIG_SYS_MAX_RAM_SIZE;
global_board_data_init();
/* Initialize */
serial_early_puts("IRQ init\n");
@ -276,7 +302,7 @@ void board_init_f(ulong bootflag)
if (CONFIG_MEM_SIZE) {
printf("RAM: ");
print_size(bd->bi_memsize, "\n");
print_size(gd->bd->bi_memsize, "\n");
}
#if defined(CONFIG_POST)