Remove dependencies on link address. Use GOT and add an new function to calculate the actual address.
Signed-off-by: Joakim Tjernlund Joakim.Tjernlund@transmode.se --- arch/powerpc/cpu/mpc83xx/start.S | 35 +++++++++++++++++++++++++++-------- 1 files changed, 27 insertions(+), 8 deletions(-)
diff --git a/arch/powerpc/cpu/mpc83xx/start.S b/arch/powerpc/cpu/mpc83xx/start.S index 0c8e884..1ab8c88 100644 --- a/arch/powerpc/cpu/mpc83xx/start.S +++ b/arch/powerpc/cpu/mpc83xx/start.S @@ -71,12 +71,12 @@ */ START_GOT GOT_ENTRY(_GOT2_TABLE_) + GOT_ENTRY(_start) GOT_ENTRY(__bss_start) GOT_ENTRY(_end)
#ifndef CONFIG_NAND_SPL GOT_ENTRY(_FIXUP_TABLE_) - GOT_ENTRY(_start) GOT_ENTRY(_start_of_vectors) GOT_ENTRY(_end_of_vectors) GOT_ENTRY(transfer_to_handler) @@ -229,10 +229,12 @@ _start: /* time t 0 */ /* there and deflate the flash size back to minimal size */ /*------------------------------------------------------------*/ bl map_flash_by_law1 - lis r4, (CONFIG_SYS_MONITOR_BASE)@h - ori r4, r4, (CONFIG_SYS_MONITOR_BASE)@l - addi r5, r4, in_flash - _start + EXC_OFF_SYS_RESET - mtlr r5 + + bl 1f +1: mflr r3 /* get current address */ + addi r3, r3, in_flash - 1b + bl add_flash_base + mtlr r3 blr in_flash: #if 1 /* Remapping flash with LAW0. */ @@ -831,10 +833,11 @@ relocate_code: bl _GLOBAL_OFFSET_TABLE_@local-4 mflr r30 #endif - mr r3, r5 /* Destination Address */ - lis r4, CONFIG_SYS_MONITOR_BASE@h /* Source Address */ - ori r4, r4, CONFIG_SYS_MONITOR_BASE@l + lwz r4, GOT(_start) /* Source Address */ + addi r4, r4, -EXC_OFF_SYS_RESET lwz r5, GOT(__bss_start) + mr r3, r10 /* Destination Address */ + sub r5, r5, r4 li r6, CONFIG_SYS_CACHELINE_SIZE /* Cache Line Size */
@@ -1128,6 +1131,21 @@ unlock_ram_in_cache: #endif /* CONFIG_SYS_INIT_RAM_LOCK */
#ifdef CONFIG_SYS_FLASHBOOT + +add_flash_base: + /* Check if already inside flash address space. */ + /* if so, do not add CONFIG_SYS_FLASH_BASE */ + lis r4, (CONFIG_SYS_FLASH_BASE)@h + ori r4, r4, (CONFIG_SYS_FLASH_BASE)@l + cmplw cr0, r3, r4 + ble cr0, 2f /* r3 < r4 ? */ + lis r6, (CONFIG_SYS_FLASH_BASE+(CONFIG_SYS_FLASH_SIZE*1024*1024-1))@h + ori r6, r6, (CONFIG_SYS_FLASH_BASE+(CONFIG_SYS_FLASH_SIZE*1024*1024-1))@l + cmplw cr0, r3, r6 + blelr cr0 /* r3 < r6 ? */ +2: add r3,r3,r4 + blr + map_flash_by_law1: /* When booting from ROM (Flash or EPROM), clear the */ /* Address Mask in OR0 so ROM appears everywhere */ @@ -1179,6 +1197,7 @@ map_flash_by_law1: */ remap_flash_by_law0: /* Initialize the BR0 with the boot ROM starting address. */ + lis r3, (CONFIG_SYS_IMMR)@h /* r3 <= CONFIG_SYS_IMMR */ lwz r4, BR0(r3) li r5, 0x7FFF and r4, r4, r5