arch/arm/mach-highbank/sysregs.h

Source file repositories/reference/linux-study-clean/arch/arm/mach-highbank/sysregs.h

File Facts

System
Linux kernel
Corpus path
arch/arm/mach-highbank/sysregs.h
Extension
.h
Size
1803 bytes
Lines
76
Domain
Architecture Layer
Bucket
arch/arm
Inferred role
Architecture Layer: implementation source
Status
source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

#ifndef _MACH_HIGHBANK__SYSREGS_H_
#define _MACH_HIGHBANK__SYSREGS_H_

#include <linux/io.h>
#include <linux/smp.h>
#include <asm/smp_plat.h>
#include <asm/smp_scu.h>
#include "core.h"

extern void __iomem *sregs_base;

#define HB_SREG_A9_PWR_REQ		0xf00
#define HB_SREG_A9_BOOT_STAT		0xf04
#define HB_SREG_A9_BOOT_DATA		0xf08

#define HB_PWR_SUSPEND			0
#define HB_PWR_SOFT_RESET		1
#define HB_PWR_HARD_RESET		2
#define HB_PWR_SHUTDOWN			3

#define SREG_CPU_PWR_CTRL(c)		(0x200 + ((c) * 4))

static inline void highbank_set_core_pwr(void)
{
	int cpu = MPIDR_AFFINITY_LEVEL(cpu_logical_map(smp_processor_id()), 0);
	if (scu_base_addr)
		scu_power_mode(scu_base_addr, SCU_PM_POWEROFF);
	else
		writel_relaxed(1, sregs_base + SREG_CPU_PWR_CTRL(cpu));
}

static inline void highbank_clear_core_pwr(void)
{
	int cpu = MPIDR_AFFINITY_LEVEL(cpu_logical_map(smp_processor_id()), 0);
	if (scu_base_addr)
		scu_power_mode(scu_base_addr, SCU_PM_NORMAL);
	else
		writel_relaxed(0, sregs_base + SREG_CPU_PWR_CTRL(cpu));
}

static inline void highbank_set_pwr_suspend(void)
{
	writel(HB_PWR_SUSPEND, sregs_base + HB_SREG_A9_PWR_REQ);
	highbank_set_core_pwr();
}

static inline void highbank_set_pwr_shutdown(void)
{
	writel(HB_PWR_SHUTDOWN, sregs_base + HB_SREG_A9_PWR_REQ);
	highbank_set_core_pwr();
}

static inline void highbank_set_pwr_soft_reset(void)
{
	writel(HB_PWR_SOFT_RESET, sregs_base + HB_SREG_A9_PWR_REQ);
	highbank_set_core_pwr();
}

static inline void highbank_set_pwr_hard_reset(void)
{
	writel(HB_PWR_HARD_RESET, sregs_base + HB_SREG_A9_PWR_REQ);
	highbank_set_core_pwr();
}

static inline void highbank_clear_pwr_request(void)
{
	writel(~0UL, sregs_base + HB_SREG_A9_PWR_REQ);
	highbank_clear_core_pwr();
}

#endif

Annotation

Implementation Notes