diff options
| -rw-r--r-- | arch/i386/cpu/start.S | 44 | ||||
| -rw-r--r-- | arch/i386/lib/board.c | 6 |
2 files changed, 33 insertions, 17 deletions
diff --git a/arch/i386/cpu/start.S b/arch/i386/cpu/start.S index 95be5a2..77f0332 100644 --- a/arch/i386/cpu/start.S +++ b/arch/i386/cpu/start.S @@ -96,21 +96,6 @@ car_init_ret: /* size memory */ call dram_init_f - /* Setup stack in SDRAM */ - movl (GD_RAM_SIZE * 4)(%ebp), %esp - - /* Test the stack */ - pushl $0 - popl %ecx - cmpl $0, %ecx - jne die - push $0x55aa55aa - popl %ecx - cmpl $0x55aa55aa, %ecx - jne die - - wbinvd - /* Set parameter to board_init_f() to boot flags */ movl (GD_FLAGS * 4)(%ebp), %eax @@ -118,6 +103,35 @@ car_init_ret: /* indicate (lack of) progress */ movw $0x85, %ax + jmp die + +.globl relocate_code +.type relocate_code, @function +relocate_code: + /* + * SDRAM has been initialised, U-Boot code has been copied into + * RAM, BSS has been cleared and relocation adjustments have been + * made. It is now time to jump into the in-RAM copy of U-Boot + * + * %eax = Address of top of stack + * %edx = Address of Global Data + * %ecx = Base address of in-RAM copy of U-Boot + */ + + /* Setup stack in RAM */ + movl %eax, %esp + + /* Setup call address of in-RAM copy of board_init_r() */ + movl $board_init_r, %ebp + subl (GD_RELOC_OFF * 4)(%edx), %ebp + + /* Setup parameters to board_init_r() */ + movl %edx, %eax + movl %ecx, %edx + + /* Jump to in-RAM copy of board_init_r() */ + call *%ebp + die: hlt jmp die hlt diff --git a/arch/i386/lib/board.c b/arch/i386/lib/board.c index d716232..60fa982 100644 --- a/arch/i386/lib/board.c +++ b/arch/i386/lib/board.c @@ -189,6 +189,7 @@ void board_init_f(ulong boot_flags) ulong *src_addr; ulong *end_addr; + void *addr_sp; void *dest_addr; ulong rel_offset; Elf32_Rel *re_src; @@ -198,6 +199,7 @@ void board_init_f(ulong boot_flags) /* Calculate destination RAM Address and relocation offset */ dest_addr = (void *)gd->ram_size; + addr_sp = dest_addr; dest_addr -= CONFIG_SYS_STACK_SIZE; dest_addr -= (bss_end - text_start); rel_offset = text_start - dest_addr; @@ -242,9 +244,9 @@ void board_init_f(ulong boot_flags) gd->flags |= GD_FLG_RELOC; /* Enter the relocated U-Boot! */ - (board_init_r - rel_offset)(gd, (ulong)dest_addr); + relocate_code((ulong)addr_sp, gd, (ulong)dest_addr); - /* NOTREACHED - board_init_f() does not return */ + /* NOTREACHED - relocate_code() does not return */ while(1); } |