[PATCH v2 01/12] mips: start.S: Add CONFIG_MIPS_INIT_JUMP_OFFSET

[Stefan Roese]

This Kconfig symbol will be introduced with the base Octeon MIPS support.
Using it, its possible to use a TEXT_BASE address which differs from
the reset PC. And with the earliest function call to mips_sram_init()
the CPU will transfer execution to the actual TEXT_BASE region. So after
returning from this function, all absolute addresses are okay again.

This will be used by the Octeon platform to copy the U-Boot image into
L2 cache and transfer execution to the cache to speed up the execution.

Signed-off-by: Stefan Roese <sr at denx.de>

---

Changes in v2:
- New patch

 arch/mips/cpu/start.S | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/mips/cpu/start.S b/arch/mips/cpu/start.S
index 6de9a2f362..f601662cd0 100644
--- a/arch/mips/cpu/start.S
+++ b/arch/mips/cpu/start.S
@@ -222,6 +222,10 @@ wr_done:
 #ifdef CONFIG_MIPS_SRAM_INIT
 	/* Initialize the SRAM first */
 	PTR_LA	t9, mips_sram_init
+#ifdef CONFIG_MIPS_INIT_JUMP_OFFSET
+	PTR_SUBU \
+		t9, t9, (CONFIG_SYS_TEXT_BASE - CONFIG_MIPS_INIT_JUMP_OFFSET)
+#endif
 	jalr	t9
 	 nop
 #endif
-- 
2.26.2