8f34c2760d
project:cfg:BoardConfig_IPC: Added fastboot BoardConfig file and firmware post-scripts, distinguishing between the BoardConfigs for Luckfox Pico Pro and Luckfox Pico Max. project:app: Added fastboot_client and rk_smart_door for quick boot applications; updated rkipc app to adapt to the latest media library. media:samples: Added more usage examples. media:rockit: Fixed bugs; removed support for retrieving data frames from VPSS. media:isp: Updated rkaiq library and related tools to support connection to RKISP_Tuner. sysdrv:Makefile: Added support for compiling drv_ko on Luckfox Pico Ultra W using Ubuntu; added support for custom root filesystem. sysdrv:tools:board: Updated Buildroot optional mirror sources, updated some software versions, and stored device tree files and configuration files that undergo multiple modifications for U-Boot and kernel separately. sysdrv:source:mcu: Used RISC-V MCU SDK with RT-Thread system, mainly for initializing camera AE during quick boot. sysdrv:source:uboot: Added support for fastboot; added high baud rate DDR bin for serial firmware upgrades. sysdrv:source:kernel: Upgraded to version 5.10.160; increased NPU frequency for RV1106G3; added support for fastboot. Signed-off-by: luckfox-eng29 <eng29@luckfox.com>
48 lines
1007 B
ArmAsm
48 lines
1007 B
ArmAsm
/* SPDX-License-Identifier: GPL-2.0-only */
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#include <linux/linkage.h>
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#include <asm/percpu.h>
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.text
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/*
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* Inputs:
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* %rsi : memory location to compare
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* %rax : low 64 bits of old value
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* %rdx : high 64 bits of old value
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* %rbx : low 64 bits of new value
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* %rcx : high 64 bits of new value
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* %al : Operation successful
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*/
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SYM_FUNC_START(this_cpu_cmpxchg16b_emu)
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#
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# Emulate 'cmpxchg16b %gs:(%rsi)' except we return the result in %al not
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# via the ZF. Caller will access %al to get result.
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#
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# Note that this is only useful for a cpuops operation. Meaning that we
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# do *not* have a fully atomic operation but just an operation that is
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# *atomic* on a single cpu (as provided by the this_cpu_xx class of
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# macros).
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#
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pushfq
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cli
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cmpq PER_CPU_VAR((%rsi)), %rax
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jne .Lnot_same
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cmpq PER_CPU_VAR(8(%rsi)), %rdx
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jne .Lnot_same
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movq %rbx, PER_CPU_VAR((%rsi))
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movq %rcx, PER_CPU_VAR(8(%rsi))
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popfq
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mov $1, %al
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RET
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.Lnot_same:
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popfq
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xor %al,%al
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RET
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SYM_FUNC_END(this_cpu_cmpxchg16b_emu)
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