projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 9839c6b8 TL |
1 | /* |
| 2 | * MTD primitives for XIP support. Architecture specific functions. | |
| 3 | * | |
| 4 | * Do not include this file directly. It's included from linux/mtd/xip.h | |
| 5 | * | |
| d6b52039 | 6 | * Author: Vladimir Barinov <vbarinov@embeddedalley.com> |
| 9839c6b8 TL |
7 | * |
| 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 | |
| 11 | * implied. | |
| 12 | */ | |
| 13 | ||
| 14 | #ifndef __ARCH_OMAP_MTD_XIP_H__ | |
| 15 | #define __ARCH_OMAP_MTD_XIP_H__ | |
| 16 | ||
| a09e64fb | 17 | #include <mach/hardware.h> |
| 9839c6b8 TL |
18 | #define OMAP_MPU_TIMER_BASE (0xfffec500) |
| 19 | #define OMAP_MPU_TIMER_OFFSET 0x100 | |
| 20 | ||
| 21 | typedef struct { | |
| 22 | u32 cntl; /* CNTL_TIMER, R/W */ | |
| 23 | u32 load_tim; /* LOAD_TIM, W */ | |
| 24 | u32 read_tim; /* READ_TIM, R */ | |
| 25 | } xip_omap_mpu_timer_regs_t; | |
| 26 | ||
| 27 | #define xip_omap_mpu_timer_base(n) \ | |
| 94113260 | 28 | ((volatile xip_omap_mpu_timer_regs_t*)OMAP1_IO_ADDRESS(OMAP_MPU_TIMER_BASE + \ |
| 9839c6b8 TL |
29 | (n)*OMAP_MPU_TIMER_OFFSET)) |
| 30 | ||
| 31 | static inline unsigned long xip_omap_mpu_timer_read(int nr) | |
| 32 | { | |
| 33 | volatile xip_omap_mpu_timer_regs_t* timer = xip_omap_mpu_timer_base(nr); | |
| 34 | return timer->read_tim; | |
| 35 | } | |
| 36 | ||
| 37 | #define xip_irqpending() \ | |
| 38 | (omap_readl(OMAP_IH1_ITR) & ~omap_readl(OMAP_IH1_MIR)) | |
| 39 | #define xip_currtime() (~xip_omap_mpu_timer_read(0)) | |
| 40 | ||
| 41 | /* | |
| 42 | * It's permitted to do approxmation for xip_elapsed_since macro | |
| 43 | * (see linux/mtd/xip.h) | |
| 44 | */ | |
| 45 | ||
| 46 | #ifdef CONFIG_MACH_OMAP_PERSEUS2 | |
| 47 | #define xip_elapsed_since(x) (signed)((~xip_omap_mpu_timer_read(0) - (x)) / 7) | |
| 48 | #else | |
| 49 | #define xip_elapsed_since(x) (signed)((~xip_omap_mpu_timer_read(0) - (x)) / 6) | |
| 50 | #endif | |
| 51 | ||
| 52 | /* | |
| 53 | * xip_cpu_idle() is used when waiting for a delay equal or larger than | |
| 54 | * the system timer tick period. This should put the CPU into idle mode | |
| 55 | * to save power and to be woken up only when some interrupts are pending. | |
| 56 | * As above, this should not rely upon standard kernel code. | |
| 57 | */ | |
| 58 | ||
| 59 | #define xip_cpu_idle() asm volatile ("mcr p15, 0, %0, c7, c0, 4" :: "r" (1)) | |
| 60 | ||
| 61 | #endif /* __ARCH_OMAP_MTD_XIP_H__ */ |