From 849369d6c66d3054688672f97d31fceb8e8230fb Mon Sep 17 00:00:00 2001 From: root Date: Fri, 25 Dec 2015 04:40:36 +0000 Subject: initial_commit --- arch/arm/mach-omap1/include/mach/mtd-xip.h | 61 ++++++++++++++++++++++++++++++ 1 file changed, 61 insertions(+) create mode 100644 arch/arm/mach-omap1/include/mach/mtd-xip.h (limited to 'arch/arm/mach-omap1/include/mach/mtd-xip.h') diff --git a/arch/arm/mach-omap1/include/mach/mtd-xip.h b/arch/arm/mach-omap1/include/mach/mtd-xip.h new file mode 100644 index 00000000..f82a8dca --- /dev/null +++ b/arch/arm/mach-omap1/include/mach/mtd-xip.h @@ -0,0 +1,61 @@ +/* + * 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 + * + * (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 +#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*)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 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__ */ -- cgit v1.2.3