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61 lines
1.9 KiB
61 lines
1.9 KiB
/* |
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* MTD primitives for XIP support. Architecture specific functions. |
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* |
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* Do not include this file directly. It's included from linux/mtd/xip.h |
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* |
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* Author: Vladimir Barinov <[email protected]> |
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* |
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* (c) 2005 MontaVista Software, Inc. This file is licensed under the |
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* terms of the GNU General Public License version 2. This program is |
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* licensed "as is" without any warranty of any kind, whether express or |
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* implied. |
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*/ |
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#ifndef __ARCH_OMAP_MTD_XIP_H__ |
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#define __ARCH_OMAP_MTD_XIP_H__ |
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#include <mach/hardware.h> |
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#define OMAP_MPU_TIMER_BASE (0xfffec500) |
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#define OMAP_MPU_TIMER_OFFSET 0x100 |
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typedef struct { |
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u32 cntl; /* CNTL_TIMER, R/W */ |
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u32 load_tim; /* LOAD_TIM, W */ |
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u32 read_tim; /* READ_TIM, R */ |
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} xip_omap_mpu_timer_regs_t; |
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#define xip_omap_mpu_timer_base(n) \ |
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((volatile xip_omap_mpu_timer_regs_t*)OMAP1_IO_ADDRESS(OMAP_MPU_TIMER_BASE + \ |
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(n)*OMAP_MPU_TIMER_OFFSET)) |
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static inline unsigned long xip_omap_mpu_timer_read(int nr) |
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{ |
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volatile xip_omap_mpu_timer_regs_t* timer = xip_omap_mpu_timer_base(nr); |
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return timer->read_tim; |
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} |
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#define xip_irqpending() \ |
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(omap_readl(OMAP_IH1_ITR) & ~omap_readl(OMAP_IH1_MIR)) |
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#define xip_currtime() (~xip_omap_mpu_timer_read(0)) |
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/* |
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* It's permitted to do approximation for xip_elapsed_since macro |
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* (see linux/mtd/xip.h) |
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*/ |
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#ifdef CONFIG_MACH_OMAP_PERSEUS2 |
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#define xip_elapsed_since(x) (signed)((~xip_omap_mpu_timer_read(0) - (x)) / 7) |
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#else |
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#define xip_elapsed_since(x) (signed)((~xip_omap_mpu_timer_read(0) - (x)) / 6) |
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#endif |
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/* |
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* xip_cpu_idle() is used when waiting for a delay equal or larger than |
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* the system timer tick period. This should put the CPU into idle mode |
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* to save power and to be woken up only when some interrupts are pending. |
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* As above, this should not rely upon standard kernel code. |
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*/ |
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#define xip_cpu_idle() asm volatile ("mcr p15, 0, %0, c7, c0, 4" :: "r" (1)) |
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#endif /* __ARCH_OMAP_MTD_XIP_H__ */
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