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authorYing Zhang <b40530@freescale.com>2013-05-20 14:07:23 +0800
committerAndy Fleming <afleming@freescale.com>2013-06-20 17:08:50 -0500
commit5df572f0131cf5e0abd8ce4e8f57841b790c40d4 (patch)
tree23a4eb5bd8468e4172a137946838ef7f9ad8e091 /README
parent505c293ffd67170507154c3660d8d880d3edd9da (diff)
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powerpc/mpc85xx: support application without resetvec segment in the linker script
For SD/SPI 2-stage bootloader, the On-Chip Rom code loads the SPL into L2 SRAM, then jump to it to begin execution. After that, the SPL loads the final uboot image into DDR, then jump to it to begin execution. The segment .resetvec in the SPL and in final U-boot is useless. So, add new symbols CONFIG_SYS_MPC85XX_NO_RESETVEC for this application. If CONFIG_SYS_MPC85XX_NO_RESETVEC is set, the segment .resetvec is excluded and the segment .bootpg is placed in the previous 4K of the segment .text. Signed-off-by: Ying Zhang <b40530@freescale.com> Signed-off-by: Andy Fleming <afleming@freescale.com>
Diffstat (limited to 'README')
-rw-r--r--README5
1 files changed, 5 insertions, 0 deletions
diff --git a/README b/README
index 983d55e..88274ed 100644
--- a/README
+++ b/README
@@ -4088,6 +4088,11 @@ Low Level (hardware related) configuration options:
that is executed before the actual U-Boot. E.g. when
compiling a NAND SPL.
+- CONFIG_SYS_MPC85XX_NO_RESETVEC
+ Only for 85xx systems. If this variable is specified, the section
+ .resetvec is not kept and the section .bootpg is placed in the
+ previous 4k of the .text section.
+
- CONFIG_ARCH_MAP_SYSMEM
Generally U-Boot (and in particular the md command) uses
effective address. It is therefore not necessary to regard