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authorLinus Torvalds <torvalds@linux-foundation.org>2026-08-24 08:46:03 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2026-08-24 08:46:03 -0700
commitcf9610f9116d55c5a66ef9f1faecacabd93a9322 (patch)
tree757a3d280760c654767631cab5ad8af2d86d1848 /arch/alpha/lib/ev67-strchr.S
downloadlinux-stable-cf9610f9116d55c5a66ef9f1faecacabd93a9322.tar.gz
linux-stable-cf9610f9116d55c5a66ef9f1faecacabd93a9322.zip
Merge tag 'pinctrl-v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrlgrafted
Pull pin control updates from Linus Walleij: "Core changes: - Use the non-blocking mux_state_try_select() in the generic MUX pin control back-end - Free pin maps on pinctrl_generic_to_map() failure in the core helpers New hardware pin control: - Qualcomm Maili TLMM SoC, PMG1110 PMIC, and Eliza LPASS LPI TLMM SoC (this is for the low power audio, LPASS = Low Power Audio SubSystem portions) - Upboard support on top of the Intel pin controller - Apple T6030 and T6031 support (just compatible strings) - Samsung Exynos 8855 SoC - Mediatek MT6858 SoC - Rockchip RK3308B and RV1106 SoCs - Airoha EN7523 and AN7563 SoCs Improvements: - Qualcomm TLMM GPIOs are unconditionally marked as wakeup capable - Qualcomm improvements on top of the Qualcomm PDC (power domain controller) irqchip improvements from tglx:s tree - Qualcomm IPQ806x and IPQ9650 non-urgent pin grop fixups - The NPCM8xx driver has been put into shape fixing many pin and group definitions - Some non-urgent Tegra 264 pin assignments are fixed up - Some non-urgent fixups to Airoha AN7581 and AN7583 registers and pin assignments, missing features etc" * tag 'pinctrl-v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl: (130 commits) dt-bindings: pinctrl: Convert TI DA850 pupd to DT schema pinctrl: meson: sync some modify from A4 pinctrl: meson: a4: Add input enable pin configuration pinctrl: realtek: rtd1625: remove unused group name spdif_sel pinctrl: realtek: rtd1625: fix base_bit for VE4 GPIO 13 dt-bindings: pinctrl: microchip,pic32mzda-pinctrl: Convert to DT schema Revert "Merge branch 'ib-rsk7204' into devel" pinctrl: rockchip: Add RV1106 pinctrl support dt-bindings: pinctrl: rockchip: Add RV1106 compatible pinctrl: rockchip: Decode drive strength in the get function pinctrl: fix PINCTRL_GENERIC_MUX not always being selectable pinctrl: airoha: add support of an7563 SoC dt-bindings: pinctrl: airoha: add support of an7563 pin controller pinctrl: airoha: try to find chip scu node by phandle first pinctrl: airoha: add support of en7523 SoC dt-bindings: pinctrl: airoha: add support of en7523 pin controller pinctrl: airoha: an7583: add support for olt pinmux pinctrl: airoha: an7583: add support for pon_alt pinmux pinctrl: airoha: an7583: add support for npu_uart pinmux dt-bindings: pinctrl: airoha: an7583: add missed features ...
Diffstat (limited to 'arch/alpha/lib/ev67-strchr.S')
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diff --git a/arch/alpha/lib/ev67-strchr.S b/arch/alpha/lib/ev67-strchr.S
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+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * arch/alpha/lib/ev67-strchr.S
+ * 21264 version contributed by Rick Gorton <rick.gorton@alpha-processor.com>
+ *
+ * Return the address of a given character within a null-terminated
+ * string, or null if it is not found.
+ *
+ * Much of the information about 21264 scheduling/coding comes from:
+ * Compiler Writer's Guide for the Alpha 21264
+ * abbreviated as 'CWG' in other comments here
+ * ftp.digital.com/pub/Digital/info/semiconductor/literature/dsc-library.html
+ * Scheduling notation:
+ * E - either cluster
+ * U - upper subcluster; U0 - subcluster U0; U1 - subcluster U1
+ * L - lower subcluster; L0 - subcluster L0; L1 - subcluster L1
+ * Try not to change the actual algorithm if possible for consistency.
+ */
+#include <linux/export.h>
+#include <asm/regdef.h>
+
+ .set noreorder
+ .set noat
+
+ .align 4
+ .globl strchr
+ .ent strchr
+strchr:
+ .frame sp, 0, ra
+ .prologue 0
+
+ ldq_u t0, 0(a0) # L : load first quadword Latency=3
+ and a1, 0xff, t3 # E : 00000000000000ch
+ insbl a1, 1, t5 # U : 000000000000ch00
+ insbl a1, 7, a2 # U : ch00000000000000
+
+ insbl t3, 6, a3 # U : 00ch000000000000
+ or t5, t3, a1 # E : 000000000000chch
+ andnot a0, 7, v0 # E : align our loop pointer
+ lda t4, -1 # E : build garbage mask
+
+ mskqh t4, a0, t4 # U : only want relevant part of first quad
+ or a2, a3, a2 # E : chch000000000000
+ inswl a1, 2, t5 # E : 00000000chch0000
+ inswl a1, 4, a3 # E : 0000chch00000000
+
+ or a1, a2, a1 # E : chch00000000chch
+ or a3, t5, t5 # E : 0000chchchch0000
+ cmpbge zero, t0, t2 # E : bits set iff byte == zero
+ cmpbge zero, t4, t4 # E : bits set iff byte is garbage
+
+ /* This quad is _very_ serialized. Lots of stalling happens */
+ or t5, a1, a1 # E : chchchchchchchch
+ xor t0, a1, t1 # E : make bytes == c zero
+ cmpbge zero, t1, t3 # E : bits set iff byte == c
+ or t2, t3, t0 # E : bits set iff char match or zero match
+
+ andnot t0, t4, t0 # E : clear garbage bits
+ cttz t0, a2 # U0 : speculative (in case we get a match)
+ nop # E :
+ bne t0, $found # U :
+
+ /*
+ * Yuk. This loop is going to stall like crazy waiting for the
+ * data to be loaded. Not much can be done about it unless it's
+ * unrolled multiple times - is that safe to do in kernel space?
+ * Or would exception handling recovery code do the trick here?
+ */
+$loop: ldq t0, 8(v0) # L : Latency=3
+ addq v0, 8, v0 # E :
+ xor t0, a1, t1 # E :
+ cmpbge zero, t0, t2 # E : bits set iff byte == 0
+
+ cmpbge zero, t1, t3 # E : bits set iff byte == c
+ or t2, t3, t0 # E :
+ cttz t3, a2 # U0 : speculative (in case we get a match)
+ beq t0, $loop # U :
+
+$found: negq t0, t1 # E : clear all but least set bit
+ and t0, t1, t0 # E :
+ and t0, t3, t1 # E : bit set iff byte was the char
+ addq v0, a2, v0 # E : Add in the bit number from above
+
+ cmoveq t1, $31, v0 # E : Two mapping slots, latency = 2
+ nop
+ nop
+ ret # L0 :
+
+ .end strchr
+ EXPORT_SYMBOL(strchr)