c44bd69c9a
Because the issue of nsim, the sleep instruction doest not work
correctly when SMP is enabled. A workaround is introduced in commit
d56a12d955, this workaround should be enabled only for SMP case in
nsim.
For other cases, no need of this workaround.
This commit fixes #24276
Signed-off-by: Wayne Ren <wei.ren@synopsys.com>
83 lines
1.5 KiB
ArmAsm
83 lines
1.5 KiB
ArmAsm
/*
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* Copyright (c) 2014 Wind River Systems, Inc.
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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/**
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* @file
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* @brief CPU power management
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*
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* CPU power management routines.
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*/
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#include <kernel_structs.h>
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#include <offsets_short.h>
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#include <toolchain.h>
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#include <linker/sections.h>
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#include <arch/cpu.h>
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GTEXT(arch_cpu_idle)
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GTEXT(arch_cpu_atomic_idle)
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GDATA(z_arc_cpu_sleep_mode)
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SECTION_VAR(BSS, z_arc_cpu_sleep_mode)
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.balign 4
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.word 0
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/*
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* @brief Put the CPU in low-power mode
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*
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* This function always exits with interrupts unlocked.
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*
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* void nanCpuIdle(void)
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*/
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SECTION_FUNC(TEXT, arch_cpu_idle)
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#ifdef CONFIG_TRACING
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push_s blink
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jl sys_trace_idle
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pop_s blink
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#endif
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ld r1, [z_arc_cpu_sleep_mode]
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or r1, r1, (1 << 4) /* set IRQ-enabled bit */
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/*
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* It's found that (in nsim_hs_smp), when cpu
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* is sleeping, no response to inter-processor interrupt
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* although it's pending and interrupts are enabled.
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* (Here fire SNPS JIRA issue P10019563-41294 to trace)
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* here is a workround
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*/
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#if defined(CONFIG_SOC_NSIM) && defined(CONFIG_SMP)
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seti r1
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_z_arc_idle_loop:
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b _z_arc_idle_loop
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#else
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sleep r1
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#endif
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j_s [blink]
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nop
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/*
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* @brief Put the CPU in low-power mode, entered with IRQs locked
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*
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* This function exits with interrupts restored to <key>.
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*
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* void arch_cpu_atomic_idle(unsigned int key)
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*/
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SECTION_FUNC(TEXT, arch_cpu_atomic_idle)
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#ifdef CONFIG_TRACING
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push_s blink
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jl sys_trace_idle
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pop_s blink
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#endif
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ld r1, [z_arc_cpu_sleep_mode]
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or r1, r1, (1 << 4) /* set IRQ-enabled bit */
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sleep r1
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j_s.d [blink]
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seti r0
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