#include <config.h>
#include <version.h>
#include <asm/global_data.h>
+#include <asm/processor.h>
#include <asm/processor-flags.h>
-#include <generated/asm-offsets.h>
+#include <generated/generic-asm-offsets.h>
.section .text
.code32
cli
cld
- /* Turn of cache (this might require a 486-class CPU) */
+ /* Turn off cache (this might require a 486-class CPU) */
movl %cr0, %eax
orl $(X86_CR0_NW | X86_CR0_CD), %eax
movl %eax, %cr0
/* This is the 32-bit cold-reset entry point */
/* Load the segement registes to match the gdt loaded in start16.S */
- movl $0x18, %eax
+ movl $(X86_GDT_ENTRY_32BIT_DS * X86_GDT_ENTRY_SIZE), %eax
movw %ax, %fs
movw %ax, %ds
movw %ax, %gs
*/
movl $CONFIG_SYS_INIT_SP_ADDR, %esp
+ /* Initialise the Global Data Pointer */
+ movl $CONFIG_SYS_INIT_GD_ADDR, %eax
+ movl %eax, %edx
+ addl $GENERATED_GBL_DATA_SIZE, %edx
+ call init_gd;
+
/* Set parameter to board_init_f() to boot flags */
xorl %eax, %eax
movw %bx, %ax
movw $0x85, %ax
jmp die
-.globl relocate_code
-.type relocate_code, @function
-relocate_code:
+.globl board_init_f_r_trampoline
+.type board_init_f_r_trampoline, @function
+board_init_f_r_trampoline:
/*
* 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
+ * %eax = Address of top of new stack
*/
/* Setup stack in RAM */
movl %eax, %esp
- /* Setup call address of in-RAM copy of board_init_r() */
- movl $board_init_r, %ebp
- addl (GENERATED_GD_RELOC_OFF)(%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
+ /* Re-enter U-Boot by calling board_init_f_r */
+ call board_init_f_r
-die: hlt
+die:
+ hlt
jmp die
hlt
blank_idt_ptr:
.word 0 /* limit */
.long 0 /* base */
+
+ .p2align 2 /* force 4-byte alignment */
+
+multiboot_header:
+ /* magic */
+ .long 0x1BADB002
+ /* flags */
+ .long (1 << 16)
+ /* checksum */
+ .long -0x1BADB002 - (1 << 16)
+ /* header addr */
+ .long multiboot_header - _x86boot_start + CONFIG_SYS_TEXT_BASE
+ /* load addr */
+ .long CONFIG_SYS_TEXT_BASE
+ /* load end addr */
+ .long 0
+ /* bss end addr */
+ .long 0
+ /* entry addr */
+ .long CONFIG_SYS_TEXT_BASE