u-boot.git/arch/arm/lib, branch v2024.04

arm: spl: Use separate fault handlers instead of a single common one

2024-01-12T02:19:25Z

It may be necessary to set breakpoints etc. on a specific fault handler in SPL. Add a Kconfig option to separate the different handlers into their own individual infinite loops. Signed-off-by: Csókás Bence

bootm: Adjust arguments of boot_os_fn

2023-12-21T21:07:52Z

Adjust boot_os_fn to use struct bootm_info instead of the separate argc, argv and image parameters. Update the handlers accordingly. Few of the functions make use of the arguments, so this improves code size slightly. Signed-off-by: Simon Glass Reviewed-by: Tom Rini

arm: semihosting: Support semihosting fallback on 32-bit ARM

2023-11-10T17:52:33Z

Add support for a semihosting fallback on 32-bit ARM. The assembly is lightly adapted from the irq return code, except there is no offset since lr already points to the correct instruction. The C side is mostly like ARM64, except we have fewer cases to deal with. Signed-off-by: Sean Anderson

arm: semihosting: Fix returning from traps on ARMv6 and lower

2023-11-10T17:52:28Z

U-Boot runs in supervisor mode. On ARMv6 and lower, software interrupts are taken in supervisor mode. When entering an interrupt, the link register is set to the address of the next instruction. However, if we are already in supervisor mode, this clobbers the link register. The debugger can't help us, since by the time it notices we've taken a software interrupt, the link register is already gone. Work around this by moving the return address to another register. Signed-off-by: Sean Anderson

arm: Fix software interrupt handler

2023-11-10T16:55:17Z

When we take a software interrupt, we are already in supervisor mode. get_bad_stack assumes we are not in supervisor mode so it can clobber the stack pointer. This causes us to have an invalid stack once that macro finishes. Revert back to the get_bad_stack_swi macro which was previously removed. Fixes: 41623c91b09 ("arm: move exception handling out of start.S files") Signed-off-by: Sean Anderson

spl: Use SYS_MALLOC_F instead of SYS_MALLOC_F_LEN

2023-10-06T18:38:12Z

Use the new SPL/TPL/VPL_SYS_MALLOC_F symbols to determine whether the malloc pool exists. Signed-off-by: Simon Glass Reviewed-by: Sean Anderson

common: Drop linux/printk.h from common header

2023-09-24T13:54:57Z

This old patch was marked as deferred. Bring it back to life, to continue towards the removal of common.h Move this out of the common header and include it only where needed. Signed-off-by: Simon Glass

Merge tag 'v2023.10-rc3' into next

2023-08-21T21:32:17Z

Prepare v2023.10-rc3 Signed-off-by: Tom Rini

arm: Use builtins for ffs/fls

2023-08-17T20:39:20Z

Since ARMv5, the clz instruction allows for efficient implementation of ffs/fls with builtins. Until ARMv7 (with Thumb-2), this instruction is only available in ARM mode. LTO makes it difficult to force specific functions to be in ARM mode, as it is effectively a form of very aggressive inlining. To work around this, fls/ffs are implemented in assembly for ARMv5 and ARMv6 when compiling U-Boot in Thumb mode. Overall, this saves around 75 bytes per call. This code is synced with v5.15 of the Linux kernel. Signed-off-by: Sean Anderson Reviewed-by: Tom Rini

arm64: smccc: add support for SMCCCv1.2 x0-x17 registers

2023-08-08T14:22:03Z

add support for x0-x17 registers used by the SMC calls In SMCCC v1.2 [1] arguments are passed in registers x1-x17. Results are returned in x0-x17. This work is inspired from the following kernel commit: arm64: smccc: Add support for SMCCCv1.2 extended input/output registers [1]: https://documentation-service.arm.com/static/5f8edaeff86e16515cdbe4c6?token= Signed-off-by: Abdellatif El Khlifi Reviewed-by: Ilias Apalodimas Reviewed-by: Jens Wiklander Reviewed-by: Simon Glass Cc: Tom Rini