u-boot.git/arch/mips/cpu/mips32, branch v2013.04

MIPS: add dynamic relocation support

2013-02-12T21:22:13Z

The code handles relocation entries with the following relocation types only: mips32: R_MIPS_REL32 mips64: R_MIPS_REL+R_MIPS_64 xburst: R_MIPS_REL32 Other relocation entries are skipped without processing. The code must be extended if other relocation types must be supported. Add -pie to LDFLAGS_FINAL to generate the .rel.dyn fixup table, which will be applied to the relocated image before transferring control to it. The CONFIG_NEEDS_MANUAL_RELOC is not needed after the patch, so remove that as well. Signed-off-by: Gabor Juhos Signed-off-by: Daniel Schwierzeck

MIPS: start.S: use symbol __image_copy_end for U-Boot image relocation

2013-02-12T21:22:13Z

Use the newly introduced symbol __image_copy_end as end address for relocation of U-Boot image. This is needed for dynamic relocation added in later patches. This patch obsoletes the symbols uboot_end and uboot_end_data which are removed. Signed-off-by: Daniel Schwierzeck

MIPS: start.S: optimize BSS initialization

2013-02-12T21:22:13Z

Get the start and end address for clearing BSS from the newly introduced symbols __bss_start and __bss_end. After GOT is relocated, those symbols are already pointing to the correct addresses. Also optimize the loop by moving the address incrementation to the delay slot to avoid the initial sub instruction. Signed-off-by: Daniel Schwierzeck

MIPS: start.S: unify and simplify reset vector handling

2013-02-12T21:22:12Z

Adopt reset vector handling from Yamon. Signed-off-by: Daniel Schwierzeck

MIPS: start.S: remove obsolete 64 bit handling in setup_c0_status

2013-02-12T21:22:12Z

Signed-off-by: Daniel Schwierzeck

MIPS: remove OUTPUT_FORMAT from linker scripts

2013-01-30T22:34:10Z

The OUTPUT_FORMAT command in linker scripts was always misused due to some endianess and toolchain problems. Use GCC flags to ensure proper output format, and get rid of the OUTPUT_FORMAT commands in the board specific u-boot.lds files. Signed-off-by: Gabor Juhos Cc: Daniel Schwierzeck Cc: Stefan Roese Cc: Wolfgang Denk Cc: Xiangfu Liu

MIPS: simplify relocated _G_O_T_ address calculation

2013-01-30T22:32:52Z

The difference between the address of the original and the relocated _GLOBAL_OFFSET_TABLE_ is always the same as the relocation offset. The relocation offset is already computed and it is available in the 's1/t6' register. Use that to adjust the relocated _G_O_T_ address, instead of calculating the offset again from the _gp value. Signed-off-by: Gabor Juhos Cc: Daniel Schwierzeck Cc: Xiangfu Liu

MIPS: start.S: don't save flush_cache parameters in advance

2013-01-27T15:40:15Z

Saving the parameters in advance unnecessarily complicates the code. The destination address is already saved in the 's2' register, and that register is not clobbered by the copy loop. The size of the copied data can be computed after the copy loop is done. Change the code to compute the size parameter right before calling flush_cache, and set the destination address parameter in the delay slot of the actuall call. Signed-off-by: Gabor Juhos Cc: Daniel Schwierzeck

MIPS: start.S: simplify relocation offset calculation

2013-01-27T15:40:07Z

The current code uses four instructions and a temporary register to calculate the relocation offset and to adjust the gp register. The relocation offset can be calculated directly from the CONFIG_SYS_MONITOR_BASE constant and from the destination address. The resulting offset can be used to adjust the gp pointer. This approach makes the code a bit simpler because it needs two instructions only. Signed-off-by: Gabor Juhos Cc: Daniel Schwierzeck

MIPS: start.S: save reused arguments earlier in relocate_code

2013-01-27T15:39:59Z

Save the reused parameters at the beginning of the 'relocate_code' function. This makes the function a bit more readable. Signed-off-by: Gabor Juhos Cc: Daniel Schwierzeck