u-boot.git/arch/arm/lib, branch v2017.07

Revert "armv7m: Disable D-cache when booting nommu(ARMv7M) Linux kernel"

2017-06-30T01:18:48Z

The author of the commit discovered later on that this was already being done in cleanup_before_linux() on arch/arm/cpu/armv7m/cpu.c. This reverts commit 8f079cccb369995e46a2ab530d5d60b88c1e70bb. Signed-off-by: Tom Rini

ARM: provide a valid exception stack address for startup code

2017-06-12T12:38:40Z

Create exception stack in IRAM if available to facilitate debugging of pre-relocation code by catching exceptions rather than stopping dead. Signed-off-by: Lothar Waßmann

arm: adjust PC displayed in exception handlers to point to the failing instruction

2017-06-12T12:38:39Z

Adjust the program counter register to point to the failing instruction depending on the exeption type. This makes it easier to localize the offending instruction leading to a fatal exception. Signed-off-by: Lothar Waßmann

ARM: remove bogus cp_delay() function

2017-06-12T12:38:39Z

The cp_delay() function was introduced because of a missing 'volatile' attribute to the 'asm' statement in get_cr() which led to the 'mrc' instruction in get_cr() being optimised out eventually. This has been fixed in commit 53fd4b8c22bb ("arm: mmu: Add missing volatile for reading SCTLR register") but the bogus cp_delay() function which was introduced as a workaround for the malfunctioning get_cr() was never removed. Signed-off-by: Lothar Waßmann

Merge git://git.denx.de/u-boot-dm

2017-06-10T22:01:22Z

armv7m: Disable D-cache when booting nommu(ARMv7M) Linux kernel

2017-06-10T00:34:54Z

Disable D-Cache is required when booting nommu Linux kernel. (please see Linux kernel source "arch/arm/kernel/head-nommu.S") U-Boot is enabled D-cache and I-Cache at startup. However, it does not disable D-Cache before booting nommu Linux kernel. Therefore, I call dcache_disable() when the CPU is ARMv7M to fix this problem. Signed-off-by: Toshifumi NISHINAGA

arm: Disable LPAE if not enabled

2017-06-09T19:39:32Z

If CONFIG_ARMV7_LPAE is not defined we should make sure that the feature is disabled. This can happen if U-Boot is chain-loaded from another boot loader which does enable LPAE. Signed-off-by: Simon Glass

arm: Don't try to support CONFIG_ARMV7_LPAE on ARMv4T

2017-06-09T19:39:32Z

At present if CONFIG_ARMV7_LPAE is defined then mmu_setup() will use instructions which are invalid on ARMv4T. This happens on Tegra since it has an ARMv4T boot CPU. Add a check for the architecture version to allow the code to be built. It will not actually be executed by the boot CPU, but needs to compile. Signed-off-by: Simon Glass

arm: Rename HCTR to HTCR

2017-06-09T19:39:31Z

This appears to be a typo. Fix it. Signed-off-by: Simon Glass

arm: Add Kconfig symbols used for Linux asm compatibility

2017-06-05T18:13:13Z

Rather than change asm files that come from Linux, add the symbols to Kconfig. Since one of the symbols is for thumb2 builds, make CPU_V7M always select them. Signed-off-by: Phil Edworthy