MIPS: make inclusion of ROM exception vectors configurable
This adds a compile time option to include code for static
exception vectors. Static exception vectors are only needed,
when the U-Boot entry point is equal to the CPU reset exception
vector address. For instance this is the case when U-Boot is
used as ROM in Qemu or booted from parallel NOR flash. When
U-Boot is booted from RAM (e.g. loaded there by SPL), the
exception vectors need to be setup dynamically, which is done
in follow-up commits.
Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 097ad58..709ac5c 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -20,6 +20,7 @@
select SUPPORTS_CPU_MIPS32_R2
select SUPPORTS_CPU_MIPS64_R1
select SUPPORTS_CPU_MIPS64_R2
+ select ROM_EXCEPTION_VECTORS
config TARGET_MALTA
bool "Support malta"
@@ -40,6 +41,7 @@
select SUPPORTS_CPU_MIPS64_R6
select SWAP_IO_SPACE
select MIPS_L1_CACHE_SHIFT_6
+ select ROM_EXCEPTION_VECTORS
config TARGET_VCT
bool "Support vct"
@@ -47,6 +49,7 @@
select SUPPORTS_CPU_MIPS32_R1
select SUPPORTS_CPU_MIPS32_R2
select SYS_MIPS_CACHE_INIT_RAM_LOAD
+ select ROM_EXCEPTION_VECTORS
config TARGET_DBAU1X00
bool "Support dbau1x00"
@@ -55,6 +58,7 @@
select SUPPORTS_CPU_MIPS32_R1
select SUPPORTS_CPU_MIPS32_R2
select SYS_MIPS_CACHE_INIT_RAM_LOAD
+ select ROM_EXCEPTION_VECTORS
select MIPS_TUNE_4KC
config TARGET_PB1X00
@@ -63,6 +67,7 @@
select SUPPORTS_CPU_MIPS32_R1
select SUPPORTS_CPU_MIPS32_R2
select SYS_MIPS_CACHE_INIT_RAM_LOAD
+ select ROM_EXCEPTION_VECTORS
select MIPS_TUNE_4KC
config ARCH_ATH79
@@ -91,6 +96,7 @@
select SUPPORTS_CPU_MIPS64_R1
select SUPPORTS_CPU_MIPS64_R2
select SUPPORTS_CPU_MIPS64_R6
+ select ROM_EXCEPTION_VECTORS
config TARGET_XILFPGA
bool "Support Imagination Xilfpga"
@@ -103,6 +109,7 @@
select SUPPORTS_CPU_MIPS32_R1
select SUPPORTS_CPU_MIPS32_R2
select MIPS_L1_CACHE_SHIFT_4
+ select ROM_EXCEPTION_VECTORS
help
This supports IMGTEC MIPSfpga platform
@@ -192,6 +199,20 @@
endchoice
+menu "General setup"
+
+config ROM_EXCEPTION_VECTORS
+ bool "Build U-Boot image with exception vectors"
+ help
+ Enable this to include exception vectors in the U-Boot image. This is
+ required if the U-Boot entry point is equal to the address of the
+ CPU reset exception vector (e.g. U-Boot as ROM loader in Qemu,
+ U-Boot booted from parallel NOR flash).
+ Disable this, if the U-Boot image is booted from DRAM (e.g. by SPL).
+ In that case the image size will be reduced by 0x500 bytes.
+
+endmenu
+
menu "OS boot interface"
config MIPS_BOOT_CMDLINE_LEGACY