diff options
Diffstat (limited to 'arch/xtensa/Kconfig')
| -rw-r--r-- | arch/xtensa/Kconfig | 48 |
1 files changed, 46 insertions, 2 deletions
diff --git a/arch/xtensa/Kconfig b/arch/xtensa/Kconfig index ea9f63c7672d..bf492f9e1f75 100644 --- a/arch/xtensa/Kconfig +++ b/arch/xtensa/Kconfig @@ -19,8 +19,8 @@ config XTENSA select GENERIC_PCI_IOMAP select GENERIC_SCHED_CLOCK select GENERIC_STRNCPY_FROM_USER if KASAN - select HAVE_ARCH_JUMP_LABEL - select HAVE_ARCH_KASAN if MMU + select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL + select HAVE_ARCH_KASAN if MMU && !XIP_KERNEL select HAVE_ARCH_TRACEHOOK select HAVE_DEBUG_KMEMLEAK select HAVE_DMA_CONTIGUOUS @@ -299,6 +299,9 @@ config XTENSA_CALIBRATE_CCOUNT config SERIAL_CONSOLE def_bool n +config PLATFORM_HAVE_XIP + def_bool n + menu "Platform options" choice @@ -325,6 +328,7 @@ config XTENSA_PLATFORM_XTFPGA select PLATFORM_WANT_DEFAULT_MEM if !MMU select SERIAL_CONSOLE select XTENSA_CALIBRATE_CCOUNT + select PLATFORM_HAVE_XIP help XTFPGA is the name of Tensilica board family (LX60, LX110, LX200, ML605). This hardware is capable of running a full Linux distribution. @@ -478,6 +482,27 @@ config INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX If in doubt, say Y. +config XIP_KERNEL + bool "Kernel Execute-In-Place from ROM" + depends on PLATFORM_HAVE_XIP + help + Execute-In-Place allows the kernel to run from non-volatile storage + directly addressable by the CPU, such as NOR flash. This saves RAM + space since the text section of the kernel is not loaded from flash + to RAM. Read-write sections, such as the data section and stack, + are still copied to RAM. The XIP kernel is not compressed since + it has to run directly from flash, so it will take more space to + store it. The flash address used to link the kernel object files, + and for storing it, is configuration dependent. Therefore, if you + say Y here, you must know the proper physical address where to + store the kernel image depending on your own flash memory usage. + + Also note that the make target becomes "make xipImage" rather than + "make Image" or "make uImage". The final kernel binary to put in + ROM memory will be arch/xtensa/boot/xipImage. + + If unsure, say N. + config MEMMAP_CACHEATTR hex "Cache attributes for the memory address space" depends on !MMU @@ -522,6 +547,16 @@ config KSEG_PADDR If unsure, leave the default value here. +config KERNEL_VIRTUAL_ADDRESS + hex "Kernel virtual address" + depends on MMU && XIP_KERNEL + default 0xd0003000 + help + This is the virtual address where the XIP kernel is mapped. + XIP kernel may be mapped into KSEG or KIO region, virtual address + provided here must match kernel load address provided in + KERNEL_LOAD_ADDRESS. + config KERNEL_LOAD_ADDRESS hex "Kernel load address" default 0x60003000 if !MMU @@ -537,12 +572,21 @@ config KERNEL_LOAD_ADDRESS config VECTORS_OFFSET hex "Kernel vectors offset" default 0x00003000 + depends on !XIP_KERNEL help This is the offset of the kernel image from the relocatable vectors base. If unsure, leave the default value here. +config XIP_DATA_ADDR + hex "XIP kernel data virtual address" + depends on XIP_KERNEL + default 0x00000000 + help + This is the virtual address where XIP kernel data is copied. + It must be within KSEG if MMU is used. + config PLATFORM_WANT_DEFAULT_MEM def_bool n |