x86: Move initial gd to fixed location
diff --git a/arch/i386/lib/board.c b/arch/i386/lib/board.c
index 2cadce8..4227312 100644
--- a/arch/i386/lib/board.c
+++ b/arch/i386/lib/board.c
@@ -45,7 +45,15 @@
#include <miiphy.h>
#endif
-DECLARE_GLOBAL_DATA_PTR;
+/*
+ * Pointer to initial global data area
+ *
+ * Here we initialize it.
+ */
+#undef XTRN_DECLARE_GLOBAL_DATA_PTR
+#define XTRN_DECLARE_GLOBAL_DATA_PTR /* empty = allocate here */
+DECLARE_GLOBAL_DATA_PTR = (gd_t *) (CONFIG_SYS_INIT_GD_ADDR);
+
/* Exports from the Linker Script */
extern ulong __text_start;
@@ -168,7 +176,7 @@
/*
* Load U-Boot into RAM, initialize BSS, perform relocation adjustments
*/
-void board_init_f (ulong gdp)
+void board_init_f(ulong mem_top)
{
void *text_start = &__text_start;
void *data_end = &__data_end;
@@ -187,11 +195,11 @@
Elf32_Rel *re_end;
/* Calculate destination RAM Address and relocation offset */
- dest_addr = (void *)gdp - (bss_end - text_start);
+ dest_addr = (void *)mem_top - (bss_end - text_start);
rel_offset = text_start - dest_addr;
/* Perform low-level initialization only when cold booted */
- if (((gd_t *)gdp)->flags & GD_FLG_COLD_BOOT) {
+ if (gd->flags & GD_FLG_COLD_BOOT) {
/* First stage CPU initialization */
if (cpu_init_f() != 0)
hang();
@@ -203,8 +211,8 @@
/* Copy U-Boot into RAM */
dst_addr = (ulong *)dest_addr;
- src_addr = (ulong *)(text_start + ((gd_t *)gdp)->load_off);
- end_addr = (ulong *)(data_end + ((gd_t *)gdp)->load_off);
+ src_addr = (ulong *)(text_start + gd->load_off);
+ end_addr = (ulong *)(data_end + gd->load_off);
while (src_addr < end_addr)
*dst_addr++ = *src_addr++;
@@ -217,8 +225,8 @@
*dst_addr++ = 0x00000000;
/* Perform relocation adjustments */
- re_src = (Elf32_Rel *)(rel_dyn_start + ((gd_t *)gdp)->load_off);
- re_end = (Elf32_Rel *)(rel_dyn_end + ((gd_t *)gdp)->load_off);
+ re_src = (Elf32_Rel *)(rel_dyn_start + gd->load_off);
+ re_end = (Elf32_Rel *)(rel_dyn_end + gd->load_off);
do {
if (re_src->r_offset >= CONFIG_SYS_TEXT_BASE)
@@ -226,11 +234,11 @@
*(Elf32_Addr *)(re_src->r_offset - rel_offset) -= rel_offset;
} while (re_src++ < re_end);
- ((gd_t *)gdp)->reloc_off = rel_offset;
- ((gd_t *)gdp)->flags |= GD_FLG_RELOC;
+ gd->reloc_off = rel_offset;
+ gd->flags |= GD_FLG_RELOC;
/* Enter the relocated U-Boot! */
- (board_init_r - rel_offset)((gd_t *)gdp, (ulong)dest_addr);
+ (board_init_r - rel_offset)(gd, (ulong)dest_addr);
/* NOTREACHED - board_init_f() does not return */
while(1);
@@ -242,11 +250,15 @@
int i;
ulong size;
static bd_t bd_data;
+ static gd_t gd_data;
init_fnc_t **init_fnc_ptr;
show_boot_progress(0x21);
- gd = id;
+ /* Global data pointer is now writable */
+ gd = &gd_data;
+ memcpy(gd, id, sizeof(gd_t));
+
/* compiler optimization barrier needed for GCC >= 3.4 */
__asm__ __volatile__("": : :"memory");