diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2019-03-20 11:01:52 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-03-20 11:01:52 -0700 |
| commit | 54c490164523de90c42b1d89e7de3befe3284d1b (patch) | |
| tree | 6c10c57195dd11665f75080054669032985dc492 /arch/arc/kernel/head.S | |
| parent | babf09c3837f3cf4b58225225609445419c338e6 (diff) | |
| parent | 9a18b5a412baf23137c8fddb4ea7f0c14087f31c (diff) | |
Merge tag 'arc-5.1-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc
Pull ARC updates from Vineet Gupta:
- unaligned access support for HS cores
- Removed extra memory barrier around spinlock code
- HSDK platform updates: enable dmac, reset
- some more boot logging updates
- misc minor fixes
* tag 'arc-5.1-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc:
arch: arc: Kconfig: pedantic formatting
ARCv2: spinlock: remove the extra smp_mb before lock, after unlock
ARC: unaligned: relax the check for gcc supporting -mno-unaligned-access
ARC: boot log: cut down on verbosity
ARCv2: boot log: refurbish HS core/release identification
arc: hsdk_defconfig: Enable CONFIG_BLK_DEV_RAM
ARC: u-boot args: check that magic number is correct
ARC: perf: bpok condition only exists for ARCompact
ARCv2: Add explcit unaligned access support (and ability to disable too)
ARCv2: lib: introduce memcpy optimized for unaligned access
ARC: [plat-hsdk]: Enable AXI DW DMAC support
ARC: [plat-hsdk]: Add reset controller handle to manage USB reset
ARC: DTB: [scripted] fix node name and address spelling
Diffstat (limited to 'arch/arc/kernel/head.S')
| -rw-r--r-- | arch/arc/kernel/head.S | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/arc/kernel/head.S b/arch/arc/kernel/head.S index 30e090625916..8f6e0447dd17 100644 --- a/arch/arc/kernel/head.S +++ b/arch/arc/kernel/head.S @@ -54,7 +54,12 @@ ; gcc 7.3.1 (ARC GNU 2018.03) onwards generates unaligned access ; by default lr r5, [status32] +#ifdef CONFIG_ARC_USE_UNALIGNED_MEM_ACCESS bset r5, r5, STATUS_AD_BIT +#else + ; Although disabled at reset, bootloader might have enabled it + bclr r5, r5, STATUS_AD_BIT +#endif kflag r5 #endif .endm @@ -106,6 +111,7 @@ ENTRY(stext) ; r2 = pointer to uboot provided cmdline or external DTB in mem ; These are handled later in handle_uboot_args() st r0, [@uboot_tag] + st r1, [@uboot_magic] st r2, [@uboot_arg] ; setup "current" tsk and optionally cache it in dedicated r25 |