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linux: reboot power down cpu timeout [1/3]

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PD#SH-5853

Problem:
reboot power down cpu timeout

Solution:
power down cpus throug bl31
set PWRN_EN bits

Verify:
S905D3

Signed-off-by: fushan.zeng <fushan.zeng@amlogic.com>
Change-Id: Ib0a9bcf5ef4d0115ba0e83864f6497761050d6f5
This commit is contained in:
fushan.zeng
2020-11-19 13:32:02 +08:00
committed by Chris
parent 2a0849472a
commit 13e82edf2e
2 changed files with 32 additions and 0 deletions
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17
arch/arm/kernel/smp.c
View File

@@ -48,6 +48,10 @@
#include <asm/mach/arch.h>
#include <asm/mpu.h>
#ifdef CONFIG_AMLOGIC_MODIFY
#include <asm/cp15.h>
#define MIDR __ACCESS_CP15(c0, 0, c0, 0)
#endif
#define CREATE_TRACE_POINTS
#include <trace/events/ipi.h>
@@ -575,6 +579,19 @@ static void ipi_cpu_stop(unsigned int cpu)
local_fiq_disable();
local_irq_disable();
#ifdef CONFIG_AMLOGIC_MODIFY
/* CORTEX-A55 need power down here for shutdown*/
/* If A55 enter WFI here, it is possible quit from wfi,
* which cause CPU PACTIVE check fail.
*/
#ifdef CONFIG_HOTPLUG_CPU
if (((read_cpuid_id() >> 4) & 0xFFF) == 0xD05) {
flush_cache_louis();
if (smp_ops.cpu_die)
smp_ops.cpu_die(cpu);
}
#endif
#endif
while (1)
cpu_relax();
}

15
arch/arm64/kernel/smp.c
View File

@@ -62,6 +62,9 @@
#define CREATE_TRACE_POINTS
#include <trace/events/ipi.h>
#ifdef CONFIG_AMLOGIC_MODIFY
#include <asm/cputype.h>
#endif
DEFINE_PER_CPU_READ_MOSTLY(int, cpu_number);
EXPORT_PER_CPU_SYMBOL(cpu_number);
@@ -833,6 +836,18 @@ static void ipi_cpu_stop(unsigned int cpu)
local_irq_disable();
#ifdef CONFIG_AMLOGIC_MODIFY
/* CORTEX-A55 need power down here for shutdown*/
/* If A55 enter WFI here, it is possible quit from wfi,
* which cause CPU PACTIVE check fail.
*/
#ifdef CONFIG_HOTPLUG_CPU
if ((read_cpuid_id() & MIDR_CPU_MODEL_MASK) == MIDR_CORTEX_A55) {
if (cpu_ops[cpu] && cpu_ops[cpu]->cpu_die)
cpu_ops[cpu]->cpu_die(cpu);
}
#endif
#endif
while (1)
cpu_relax();
}