/* * 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@ru.mvista.com> * * (c) 2005 MontaVista Software, Inc. This file is licensed under the * terms of the GNU General Public License version 2. This program is * licensed "as is" without any warranty of any kind, whether express or * implied. */ #ifndef __ARCH_OMAP_MTD_XIP_H__ #define __ARCH_OMAP_MTD_XIP_H__ #include <asm/hardware.h> #define OMAP_MPU_TIMER_BASE (0xfffec500) #define OMAP_MPU_TIMER_OFFSET 0x100 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*)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 approxmation for xip_elapsed_since macro * (see linux/mtd/xip.h) */ #ifdef CONFIG_MACH_OMAP_PERSEUS2 #define xip_elapsed_since(x) (signed)((~xip_omap_mpu_timer_read(0) - (x)) / 7) #else #define xip_elapsed_since(x) (signed)((~xip_omap_mpu_timer_read(0) - (x)) / 6) #endif /* * 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__ */