arm: Add CONFIG_DELAY_ENVIRONMENT to delay environment loading

[u-boot] / arch / arm / lib / board.c

diff --git a/arch/arm/lib/board.c b/arch/arm/lib/board.c
index 99cb54b8d8c88e1ef4a7e81e8a8b72e747169a29..a1eb7993ad8dc4d29727db1e18759a480646128a 100644 (file)
--- a/arch/arm/lib/board.c
+++ b/arch/arm/lib/board.c
@@ -40,6 +40,7 @@
 
 #include <common.h>
 #include <command.h>
+#include <environment.h>
 #include <malloc.h>
 #include <stdio_dev.h>
 #include <version.h>
@@ -57,13 +58,6 @@
 #include <miiphy.h>
 #endif
 
-#ifdef CONFIG_DRIVER_SMC91111
-#include "../drivers/net/smc91111.h"
-#endif
-#ifdef CONFIG_DRIVER_LAN91C96
-#include "../drivers/net/lan91c96.h"
-#endif
-
 DECLARE_GLOBAL_DATA_PTR;
 
 ulong monitor_flash_len;
@@ -231,14 +225,20 @@ int __arch_cpu_init(void)
 int arch_cpu_init(void)
        __attribute__((weak, alias("__arch_cpu_init")));
 
+int __power_init_board(void)
+{
+       return 0;
+}
+int power_init_board(void)
+       __attribute__((weak, alias("__power_init_board")));
+
 init_fnc_t *init_sequence[] = {
        arch_cpu_init,          /* basic arch cpu dependent setup */
-
-#if defined(CONFIG_BOARD_EARLY_INIT_F)
-       board_early_init_f,
-#endif
 #ifdef CONFIG_OF_CONTROL
        fdtdec_check_fdt,
+#endif
+#if defined(CONFIG_BOARD_EARLY_INIT_F)
+       board_early_init_f,
 #endif
        timer_init,             /* initialize timer */
 #ifdef CONFIG_BOARD_POSTCLK_INIT
@@ -279,11 +279,6 @@ void board_init_f(ulong bootflag)
 
        bootstage_mark_name(BOOTSTAGE_ID_START_UBOOT_F, "board_init_f");
 
-       /* Pointer is writable since we allocated a register for it */
-       gd = (gd_t *) ((CONFIG_SYS_INIT_SP_ADDR) & ~0x07);
-       /* compiler optimization barrier needed for GCC >= 3.4 */
-       __asm__ __volatile__("": : :"memory");
-
        memset((void *)gd, 0, sizeof(gd_t));
 
        gd->mon_len = _bss_end_ofs;
@@ -353,13 +348,14 @@ void board_init_f(ulong bootflag)
 
 #if !(defined(CONFIG_SYS_ICACHE_OFF) && defined(CONFIG_SYS_DCACHE_OFF))
        /* reserve TLB table */
-       addr -= (4096 * 4);
+       gd->tlb_size = 4096 * 4;
+       addr -= gd->tlb_size;
 
        /* round down to next 64 kB limit */
        addr &= ~(0x10000 - 1);
 
        gd->tlb_addr = addr;
-       debug("TLB table at: %08lx\n", addr);
+       debug("TLB table from %08lx to %08lx\n", addr, addr + gd->tlb_size);
 #endif
 
        /* round down to next 4 kB limit */
@@ -465,10 +461,6 @@ void board_init_f(ulong bootflag)
                gd->fdt_blob = new_fdt;
        }
        memcpy(id, (void *)gd, sizeof(gd_t));
-
-       relocate_code(addr_sp, id, addr);
-
-       /* NOTREACHED - relocate_code() does not return */
 }
 
 #if !defined(CONFIG_SYS_NO_FLASH)
@@ -476,7 +468,28 @@ static char *failed = "*** failed ***\n";
 #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 not 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", 0);
+#elif defined CONFIG_DELAY_ENVIRONMENT
+       return 0;
+#else
+       return 1;
+#endif
+}
+
+/************************************************************************
  *
  * This is the next part if the initialization sequence: we are now
  * running from RAM and have a "normal" C environment, i. e. global
@@ -493,8 +506,6 @@ void board_init_r(gd_t *id, ulong dest_addr)
        ulong flash_size;
 #endif
 
-       gd = id;
-
        gd->flags |= GD_FLG_RELOC;      /* tell others: relocation done */
        bootstage_mark_name(BOOTSTAGE_ID_START_UBOOT_R, "board_init_r");
 
@@ -532,6 +543,7 @@ void board_init_r(gd_t *id, ulong dest_addr)
 #ifdef CONFIG_ARCH_EARLY_INIT_R
        arch_early_init_r();
 #endif
+       power_init_board();
 
 #if !defined(CONFIG_SYS_NO_FLASH)
        puts("Flash: ");
@@ -539,15 +551,13 @@ void board_init_r(gd_t *id, ulong dest_addr)
        flash_size = flash_init();
        if (flash_size > 0) {
 # ifdef CONFIG_SYS_FLASH_CHECKSUM
-               char *s = getenv("flashchecksum");
-
                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 (s && (*s == 'y')) {
+               if (getenv_yesno("flashchecksum") == 1) {
                        printf("  CRC: %08X", crc32(0,
                                (const unsigned char *) CONFIG_SYS_FLASH_BASE,
                                flash_size));
@@ -582,7 +592,10 @@ void board_init_r(gd_t *id, ulong dest_addr)
 #endif
 
        /* initialize environment */
-       env_relocate();
+       if (should_load_env())
+               env_relocate();
+       else
+               set_default_env(NULL);
 
 #if defined(CONFIG_CMD_PCI) || defined(CONFIG_PCI)
        arm_pci_init();
@@ -613,16 +626,6 @@ void board_init_r(gd_t *id, ulong dest_addr)
        /* enable exceptions */
        enable_interrupts();
 
-       /* Perform network card initialisation if necessary */
-#if defined(CONFIG_DRIVER_SMC91111) || defined (CONFIG_DRIVER_LAN91C96)
-       /* XXX: this needs to be moved to board init */
-       if (getenv("ethaddr")) {
-               uchar enetaddr[6];
-               eth_getenv_enetaddr("ethaddr", enetaddr);
-               smc_set_mac_addr(enetaddr);
-       }
-#endif /* CONFIG_DRIVER_SMC91111 || CONFIG_DRIVER_LAN91C96 */
-
        /* Initialize from environment */
        load_addr = getenv_ulong("loadaddr", 16, load_addr);