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ARMv8: get new GD address from gd->new_gd directly

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the new GD address is calculated via board data BD currently
it require the new GD area locates below BD tightly, so a strict
constraint is imposed on memory layout which maybe make special
platform unpleasant.

fix it by getting new GD address from gd->new_gd directly.

Signed-off-by: zijun_hu <zijun_hu@htc.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
zijun_hu 2017-09-22 14:39:13 +08:00 committed by Tom Rini
parent 0d3aaa35b8
commit 01a8359989
2 changed files with 3 additions and 2 deletions
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3
arch/arm/lib/crt0_64.S
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@ -95,8 +95,7 @@ ENTRY(_main)
*/
ldr x0, [x18, #GD_START_ADDR_SP] /* x0 <- gd->start_addr_sp */
bic sp, x0, #0xf /* 16-byte alignment for ABI compliance */
ldr x18, [x18, #GD_BD] /* x18 <- gd->bd */
sub x18, x18, #GD_SIZE /* new GD is below bd */
ldr x18, [x18, #GD_NEW_GD] /* x18 <- gd->new_gd */
adr lr, relocation_return
ldr x9, [x18, #GD_RELOC_OFF] /* x9 <- gd->reloc_off */

2
lib/asm-offsets.c
View File

@ -38,5 +38,7 @@ int main(void)
DEFINE(GD_START_ADDR_SP, offsetof(struct global_data, start_addr_sp));
DEFINE(GD_NEW_GD, offsetof(struct global_data, new_gd));
return 0;
}