2 * MTD primitives for XIP support. Architecture specific functions.
4 * Do not include this file directly. It's included from linux/mtd/xip.h
6 * Author: Vladimir Barinov <vbarinov@embeddedalley.com>
8 * (c) 2005 MontaVista Software, Inc. This file is licensed under the
9 * terms of the GNU General Public License version 2. This program is
10 * licensed "as is" without any warranty of any kind, whether express or
14 #ifndef __ARCH_OMAP_MTD_XIP_H__
15 #define __ARCH_OMAP_MTD_XIP_H__
18 #include <linux/soc/ti/omap1-io.h>
19 #define OMAP_MPU_TIMER_BASE (0xfffec500)
20 #define OMAP_MPU_TIMER_OFFSET 0x100
23 u32 cntl; /* CNTL_TIMER, R/W */
24 u32 load_tim; /* LOAD_TIM, W */
25 u32 read_tim; /* READ_TIM, R */
26 } xip_omap_mpu_timer_regs_t;
28 #define xip_omap_mpu_timer_base(n) \
29 ((volatile xip_omap_mpu_timer_regs_t*)OMAP1_IO_ADDRESS(OMAP_MPU_TIMER_BASE + \
30 (n)*OMAP_MPU_TIMER_OFFSET))
32 static inline unsigned long xip_omap_mpu_timer_read(int nr)
34 volatile xip_omap_mpu_timer_regs_t* timer = xip_omap_mpu_timer_base(nr);
35 return timer->read_tim;
38 #define xip_irqpending() \
39 (omap_readl(OMAP_IH1_ITR) & ~omap_readl(OMAP_IH1_MIR))
40 #define xip_currtime() (~xip_omap_mpu_timer_read(0))
43 * It's permitted to do approximation for xip_elapsed_since macro
44 * (see linux/mtd/xip.h)
47 #ifdef CONFIG_MACH_OMAP_PERSEUS2
48 #define xip_elapsed_since(x) (signed)((~xip_omap_mpu_timer_read(0) - (x)) / 7)
50 #define xip_elapsed_since(x) (signed)((~xip_omap_mpu_timer_read(0) - (x)) / 6)
54 * xip_cpu_idle() is used when waiting for a delay equal or larger than
55 * the system timer tick period. This should put the CPU into idle mode
56 * to save power and to be woken up only when some interrupts are pending.
57 * As above, this should not rely upon standard kernel code.
60 #define xip_cpu_idle() asm volatile ("mcr p15, 0, %0, c7, c0, 4" :: "r" (1))
62 #endif /* __ARCH_OMAP_MTD_XIP_H__ */