/* SPDX-License-Identifier: GPL-2.0-only */
/*
* MTD primitives for XIP support . Architecture specific functions .
*
* Do not include this file directly . It ' s included from linux / mtd / xip . h
*
* Author : Vladimir Barinov < vbarinov @ embeddedalley . com >
*
* ( c ) 2005 MontaVista Software , Inc .
*/
#ifndef __ARCH_OMAP_MTD_XIP_H__
#define __ARCH_OMAP_MTD_XIP_H__
#include "hardware.h"
#include <linux/soc/ti/omap1-io.h>
#define OMAP_MPU_TIMER_BASE (0 xfffec500)
#define OMAP_MPU_TIMER_OFFSET 0 x100
typedef struct {
u32 cntl; /* CNTL_TIMER, R/W */
u32 load_tim; /* LOAD_TIM, W */
u32 read_tim; /* READ_TIM, R */
} xip_omap_mpu_timer_regs_t;
#define xip_omap_mpu_timer_base(n) \
((volatile xip_omap_mpu_timer_regs_t*)OMAP1_IO_ADDRESS(OMAP_MPU_TIMER_BASE + \
(n)*OMAP_MPU_TIMER_OFFSET))
static inline unsigned long xip_omap_mpu_timer_read(int nr)
{
volatile xip_omap_mpu_timer_regs_t* timer = xip_omap_mpu_timer_base(nr);
return timer->read_tim;
}
#define xip_irqpending() \
(omap_readl(OMAP_IH1_ITR) & ~omap_readl(OMAP_IH1_MIR))
#define xip_currtime() (~xip_omap_mpu_timer_read(0 ))
/*
* It ' s permitted to do approximation for xip_elapsed_since macro
* ( see linux / mtd / xip . h )
*/
#define xip_elapsed_since(x) (signed )((~xip_omap_mpu_timer_read(0 ) - (x)) / 6 )
/*
* xip_cpu_idle ( ) is used when waiting for a delay equal or larger than
* the system timer tick period . This should put the CPU into idle mode
* to save power and to be woken up only when some interrupts are pending .
* As above , this should not rely upon standard kernel code .
*/
#define xip_cpu_idle() asm volatile ("mcr p15, 0, %0, c7, c0, 4" :: "r" (1 ))
#endif /* __ARCH_OMAP_MTD_XIP_H__ */
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