On Mon, 2014-03-31 at 15:35 +0530, Prabhakar Kushwaha wrote:
+void board_init_f(ulong bootflag) +{
- u32 plat_ratio, sys_clk, uart_clk;
- ccsr_gur_t *gur = (void *)CONFIG_SYS_MPC85xx_GUTS_ADDR;
- /* Memcpy existing GD at CONFIG_SPL_GD_ADDR */
- memcpy((void *)CONFIG_SPL_GD_ADDR, (void *)gd, sizeof(gd_t));
- /* Update GD pointer */
- gd = (gd_t *)(CONFIG_SPL_GD_ADDR);
- __asm__ __volatile__("" : : : "memory");
Explain why this barrier is needed.
+#ifndef CONFIG_SPL_NAND_BOOT
- env_init();
+#endif
- /* relocate environment function pointers etc. */
+#ifdef CONFIG_SPL_NAND_BOOT
- nand_spl_load_image(CONFIG_ENV_OFFSET, CONFIG_ENV_SIZE,
(uchar *)CONFIG_ENV_ADDR);- gd->env_addr = (ulong)(CONFIG_ENV_ADDR);
- gd->env_valid = 1;
+#else
- env_relocate();
+#endif
Move env_init() to be just before env_relocate(), rather than duplicating the ifdef.
- i2c_init_all();
- puts("\n\n");
- gd->ram_size = initdram(0);
What is the 0?
diff --git a/doc/README.b4860qds b/doc/README.b4860qds index 3da77d9..44b46da 100644 --- a/doc/README.b4860qds +++ b/doc/README.b4860qds @@ -328,3 +328,38 @@ The below commands apply to both B4860QDS and B4420QDS. On Linux the interfaces are renamed as: . eth2 -> fm1-gb2 . eth3 -> fm1-gb3
+NAND boot with 2 Stage boot loader +---------------------------------- +PBL initialise the internal SRAM and copy SPL(160KB) in SRAM. +SPL further initialise DDR using SPD and environment variables and copy +u-boot(768 KB) from flash to DDR. +Finally SPL transer control to u-boot for futher booting.
+SPL has following features:
- Executes within 256K
- No relocation required
- Run time view of SPL framework :-
- Area | Address |
+-----------------------------------------------
- Reserve | 0xFFFC0000 (32KB) |
s/Reserve/Reserved/
What is it reserved for/by? Something external? Or does U-Boot just not use that area currently? In that case just say "Unused".
+NAND Flash memory Map on B4860 and B4420QDS +------------------------------------------
- Start End Definition Size
+0x000000 0x0FFFFF u-boot 1MB +0x140000 0x15FFFF u-boot env 128KB +0x160000 0x17FFFF FMAN Ucode 128KB
What goes at 0x100000?
What if 0x140000 or 0x160000 is a bad block?
-Scott