linux/include/asm-arm/arch-omap/mtd-xip.h
Tony Lindgren 9839c6b8dd [ARM] 2888/1: OMAP 3/4: Update omap include files, take 2
Patch from Tony Lindgren

This patch syncs the mainline kernel with linux-omap tree.
The highlights of the patch are:
- Start adding 24xx support by Paul Mundt
- Clean-up of cpu detection by Dirk Behme and Tony Lindgren
- Add DSP header by Toshihiro Kobayashi
- Add support for mtd-xip by Vladimir Barinov
- Add various new mux registers
- Move OMAP specific serial defines back to serial.h

Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-09-07 17:20:27 +01:00

61 lines
1.9 KiB
C

/*
* 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__ */