更新日期: 2022/06/01 来源: https://gitee.com/weharmony/kernel_liteos_a_note
smp.c
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1/*
2 * Copyright (c) 2013-2019 Huawei Technologies Co., Ltd. All rights reserved.
3 * Copyright (c) 2020-2021 Huawei Device Co., Ltd. All rights reserved.
4 *
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10 *
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12 * of conditions and the following disclaimer in the documentation and/or other materials
13 * provided with the distribution.
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16 * to endorse or promote products derived from this software without specific prior written
17 * permission.
18 *
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25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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30 */
31
32#include "smp.h"
33#include "arch_config.h"
34#include "los_base.h"
35#include "los_hw.h"
36#include "los_atomic.h"
37#include "los_arch_mmu.h"
38#include "gic_common.h"
39#include "los_task_pri.h"
40
41#ifdef LOSCFG_KERNEL_SMP
42
43extern VOID reset_vector(VOID);
44
45struct OsCpuInit {
47 VOID *arg;
49};
50
51STATIC struct OsCpuInit g_cpuInit[CORE_NUM - 1] = {0};
52
53VOID HalArchCpuOn(UINT32 cpuNum, ArchCpuStartFunc func, struct SmpOps *ops, VOID *arg)
54{
55 struct OsCpuInit *cpuInit = &g_cpuInit[cpuNum - 1];
56 UINTPTR startEntry = (UINTPTR)&reset_vector - KERNEL_VMM_BASE + SYS_MEM_BASE;
57 INT32 ret;
58
59 cpuInit->cpuStart = func;
60 cpuInit->arg = arg;
61 cpuInit->initFlag = 0;
62
63 DCacheFlushRange((UINTPTR)cpuInit, (UINTPTR)cpuInit + sizeof(struct OsCpuInit));
64
65 LOS_ASSERT(ops != NULL);
66
67
68 ret = ops->SmpCpuOn(cpuNum, startEntry);
69 if (ret < 0) {
70 PRINT_ERR("cpu start failed, cpu num: %u, ret: %d\n", cpuNum, ret);
71 return;
72 }
73
74 while (!LOS_AtomicRead(&cpuInit->initFlag)) {
75 WFE;
76 }
77}
78
80{
81 UINT32 cpuid = ArchCurrCpuid();
82 struct OsCpuInit *cpuInit = &g_cpuInit[cpuid - 1];
83
85
86 LOS_AtomicSet(&cpuInit->initFlag, 1);
87 SEV;
88
89#ifdef LOSCFG_KERNEL_MMU
91#endif
92
93 /* store each core's hwid */
94 CPU_MAP_SET(cpuid, OsHwIDGet());
96
97 cpuInit->cpuStart(cpuInit->arg);
98
99 while (1) {
100 WFI;
101 }
102}
103#endif
104
GIC(Generic Interrupt Controller)是ARM公司提供的一个通用的中断控制器 http://weharmonyos.com/blog/44....
VOID HalIrqInitPercpu(VOID)
中断控制器与CPU之间的关系初始化
Definition: gic_v2.c:109
STATIC INLINE INT32 LOS_AtomicRead(const Atomic *v)
Atomic read. | 读取32bit原子数据
Definition: los_atomic.h:123
STATIC INLINE VOID LOS_AtomicSet(Atomic *v, INT32 setVal)
Atomic setting.
Definition: los_atomic.h:147
https://blog.csdn.net/qq_38410730/article/details/81036768
VOID OsArchMmuInitPerCPU(VOID)
原子操作 http://weharmonyos.com/openharmony/zh-cn/device-dev/kernel/kernel-small-basic-atomic....
volatile INT32 Atomic
Definition: los_atomic.h:102
VOID DCacheFlushRange(UINT32 start, UINT32 end)
Definition: los_hw.c:170
STATIC INLINE UINT32 ArchCurrCpuid(VOID)
Definition: los_hw_cpu.h:168
STATIC INLINE UINT64 OsHwIDGet(VOID)
获取CPU硬件ID,每个CPU都有自己的唯一标识
Definition: los_hw_cpu.h:177
STATIC INLINE VOID OsCurrTaskSet(LosTaskCB *task)
注意任务地址由硬件保存,见于 CP15 | TPIDRPRW
LosTaskCB * OsGetMainTask()
Definition: los_task.c:162
signed int INT32
Definition: los_typedef.h:60
unsigned long UINTPTR
Definition: los_typedef.h:68
unsigned int UINT32
Definition: los_typedef.h:57
VOID HalSecondaryCpuStart(VOID)
Definition: smp.c:79
VOID reset_vector(VOID)
VOID HalArchCpuOn(UINT32 cpuNum, ArchCpuStartFunc func, struct SmpOps *ops, VOID *arg)
Definition: smp.c:53
STATIC struct OsCpuInit g_cpuInit[CORE_NUM - 1]
Definition: smp.c:51
VOID(* ArchCpuStartFunc)(VOID *arg)
Definition: smp.h:47
Definition: smp.c:45
Atomic initFlag
Definition: smp.c:48
VOID * arg
Definition: smp.c:47
ArchCpuStartFunc cpuStart
Definition: smp.c:46
Definition: smp.h:43
INT32(* SmpCpuOn)(UINT32 cpuNum, UINTPTR startEntry)
Definition: smp.h:44