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-rw-r--r--include/linux/mtd/xip.h31
1 files changed, 13 insertions, 18 deletions
diff --git a/include/linux/mtd/xip.h b/include/linux/mtd/xip.h
index fc071125cbcc..7b7deef6b180 100644
--- a/include/linux/mtd/xip.h
+++ b/include/linux/mtd/xip.h
@@ -58,22 +58,16 @@
58 * returned value is <= the real elapsed time. 58 * returned value is <= the real elapsed time.
59 * note 2: this should be able to cope with a few seconds without 59 * note 2: this should be able to cope with a few seconds without
60 * overflowing. 60 * overflowing.
61 *
62 * xip_iprefetch()
63 *
64 * Macro to fill instruction prefetch
65 * e.g. a series of nops: asm volatile (".rep 8; nop; .endr");
61 */ 66 */
62 67
63#if defined(CONFIG_ARCH_SA1100) || defined(CONFIG_ARCH_PXA) 68#include <asm/mtd-xip.h>
64
65#include <asm/hardware.h>
66#ifdef CONFIG_ARCH_PXA
67#include <asm/arch/pxa-regs.h>
68#endif
69
70#define xip_irqpending() (ICIP & ICMR)
71
72/* we sample OSCR and convert desired delta to usec (1/4 ~= 1000000/3686400) */
73#define xip_currtime() (OSCR)
74#define xip_elapsed_since(x) (signed)((OSCR - (x)) / 4)
75 69
76#else 70#ifndef xip_irqpending
77 71
78#warning "missing IRQ and timer primitives for XIP MTD support" 72#warning "missing IRQ and timer primitives for XIP MTD support"
79#warning "some of the XIP MTD support code will be disabled" 73#warning "some of the XIP MTD support code will be disabled"
@@ -85,16 +79,17 @@
85 79
86#endif 80#endif
87 81
82#ifndef xip_iprefetch
83#define xip_iprefetch() do { } while (0)
84#endif
85
88/* 86/*
89 * xip_cpu_idle() is used when waiting for a delay equal or larger than 87 * xip_cpu_idle() is used when waiting for a delay equal or larger than
90 * the system timer tick period. This should put the CPU into idle mode 88 * the system timer tick period. This should put the CPU into idle mode
91 * to save power and to be woken up only when some interrupts are pending. 89 * to save power and to be woken up only when some interrupts are pending.
92 * As above, this should not rely upon standard kernel code. 90 * This should not rely upon standard kernel code.
93 */ 91 */
94 92#ifndef xip_cpu_idle
95#if defined(CONFIG_CPU_XSCALE)
96#define xip_cpu_idle() asm volatile ("mcr p14, 0, %0, c7, c0, 0" :: "r" (1))
97#else
98#define xip_cpu_idle() do { } while (0) 93#define xip_cpu_idle() do { } while (0)
99#endif 94#endif
100 95