This patch enables ARM_PATCH_PHYS_VIRT and AUTO_ZRELADDR as default configs to EP93XX platforms from Cirrus.
Introduction of PHYS_VIRT config as default config enables phy-to-virt and virt-to-phy translation functions at boot and module loading time, and enforce dynamic reallocation of memory. PHYS_VIRT config is mutually exclusive to XIP_KERNEL, XIP_KERNEL is used in systems with NOR flash devices.
AUTO_ZRELADDR config enables auto calculation of the decompressed kernel image address. AUTO_ZRELADDR config is mutually exclusive to ZBOOT_ROM, and also assumes zImage to be loaded in the first 128MiB from start of memory.
CFT::Call For Testing
Requesting maintainers of EP93XX platform to evaluate the changes on the board and comment, as I dont have the board for testing and also requesting an ACK.
Signed-off-by: panchaxari panchaxari.prasannamurthy@linaro.org Cc: Hartley Sweeten hsweeten@visionengravers.com Cc: Ryan Mallon rmallon@gmail.com Cc: Linus Walleij linus.walleij@linaro.org Cc: Russell King linux@arm.linux.org.uk Cc: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org --- Below lkml link is a quoting by Russell which explains more on concept of PHYS_VIRT and ZRELADDR -------------------------------------------------
https://lkml.org/lkml/2011/10/14/434
------------------------------------------------- --- arch/arm/Kconfig | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 3501362..077ef9d 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -420,10 +420,12 @@ config ARCH_EBSA110 config ARCH_EP93XX bool "EP93xx-based" select ARCH_HAS_HOLES_MEMORYMODEL + select ARCH_PATCH_PHYS_VIRT select ARCH_REQUIRE_GPIOLIB select ARCH_USES_GETTIMEOFFSET select ARM_AMBA select ARM_VIC + select AUTO_ZRELADDR select CLKDEV_LOOKUP select CPU_ARM920T select NEED_MACH_MEMORY_H