diff options
| author | Tom Rini <[email protected]> | 2023-10-02 10:55:44 -0400 |
|---|---|---|
| committer | Tom Rini <[email protected]> | 2023-10-02 10:55:44 -0400 |
| commit | ac897385bbfa30cfdfb62ccf24acfcd4b274b2ff (patch) | |
| tree | ae567980737beb24ca24e2ee8cfeaf6eb9e26e3f /arch/arm/lib | |
| parent | 4459ed60cb1e0562bc5b40405e2b4b9bbf766d57 (diff) | |
| parent | e29b932aa07fa0226d325b35d96cd4eea0370129 (diff) | |
Merge branch 'next'
Signed-off-by: Tom Rini <[email protected]>
Diffstat (limited to 'arch/arm/lib')
| -rw-r--r-- | arch/arm/lib/Makefile | 5 | ||||
| -rw-r--r-- | arch/arm/lib/bitops.S | 45 | ||||
| -rw-r--r-- | arch/arm/lib/gic-v3-its.c | 1 |
3 files changed, 51 insertions, 0 deletions
diff --git a/arch/arm/lib/Makefile b/arch/arm/lib/Makefile index 62cf80f3739..b1bcd374662 100644 --- a/arch/arm/lib/Makefile +++ b/arch/arm/lib/Makefile @@ -113,6 +113,11 @@ AFLAGS_REMOVE_memset.o := -mthumb -mthumb-interwork AFLAGS_REMOVE_memcpy.o := -mthumb -mthumb-interwork AFLAGS_memset.o := -DMEMSET_NO_THUMB_BUILD AFLAGS_memcpy.o := -DMEMCPY_NO_THUMB_BUILD + +# This is only necessary to force ARM mode on THUMB1 targets. +ifneq ($(CONFIG_SYS_ARM_ARCH),4) +obj-y += bitops.o +endif endif endif diff --git a/arch/arm/lib/bitops.S b/arch/arm/lib/bitops.S new file mode 100644 index 00000000000..29d15246346 --- /dev/null +++ b/arch/arm/lib/bitops.S @@ -0,0 +1,45 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2023 Sean Anderson <[email protected]> + * + * ARM bitops to call when using THUMB1, which doesn't have these instructions. + */ +#include <linux/linkage.h> +#include <asm/assembler.h> + +.pushsection .text.__fls +ENTRY(__fls) + clz r0, r0 + rsb r0, r0, #31 + ret lr +ENDPROC(__fls) +.popsection + +.pushsection .text.__ffs +ENTRY(__ffs) + rsb r3, r0, #0 + and r0, r0, r3 + clz r0, r0 + rsb r0, r0, #31 + ret lr +ENDPROC(__ffs) +.popsection + +.pushsection .text.fls +ENTRY(fls) + cmp r0, #0 + clzne r0, r0 + rsbne r0, r0, #32 + ret lr +ENDPROC(fls) +.popsection + +.pushsection .text.ffs +ENTRY(ffs) + rsb r3, r0, #0 + and r0, r0, r3 + clz r0, r0 + rsb r0, r0, #32 + ret lr +ENDPROC(ffs) +.popsection diff --git a/arch/arm/lib/gic-v3-its.c b/arch/arm/lib/gic-v3-its.c index f6211a2d92c..f4bbd21da91 100644 --- a/arch/arm/lib/gic-v3-its.c +++ b/arch/arm/lib/gic-v3-its.c @@ -9,6 +9,7 @@ #include <asm/gic-v3.h> #include <asm/io.h> #include <linux/bitops.h> +#include <linux/printk.h> #include <linux/sizes.h> static u32 lpi_id_bits; |