diff options
Diffstat (limited to 'arch/arm/plat-omap/include/mach/mtd-xip.h')
-rw-r--r-- | arch/arm/plat-omap/include/mach/mtd-xip.h | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/arch/arm/plat-omap/include/mach/mtd-xip.h b/arch/arm/plat-omap/include/mach/mtd-xip.h new file mode 100644 index 000000000000..5cee7e16a1b4 --- /dev/null +++ b/arch/arm/plat-omap/include/mach/mtd-xip.h | |||
@@ -0,0 +1,61 @@ | |||
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 | * | ||
6 | * Author: Vladimir Barinov <vbarinov@ru.mvista.com> | ||
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 | |||
17 | #include <mach/hardware.h> | ||
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) \ | ||
28 | ((volatile xip_omap_mpu_timer_regs_t*)IO_ADDRESS(OMAP_MPU_TIMER_BASE + \ | ||
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__ */ | ||