diff options
Diffstat (limited to 'arch/arm/mach-pxa/include/mach/mtd-xip.h')
| -rw-r--r-- | arch/arm/mach-pxa/include/mach/mtd-xip.h | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/arch/arm/mach-pxa/include/mach/mtd-xip.h b/arch/arm/mach-pxa/include/mach/mtd-xip.h new file mode 100644 index 000000000..4b31bef9e --- /dev/null +++ b/arch/arm/mach-pxa/include/mach/mtd-xip.h @@ -0,0 +1,36 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * MTD primitives for XIP support. Architecture specific functions + * + * Do not include this file directly. It's included from linux/mtd/xip.h + * + * Author: Nicolas Pitre + * Created: Nov 2, 2004 + * Copyright: (C) 2004 MontaVista Software, Inc. + */ + +#ifndef __ARCH_PXA_MTD_XIP_H__ +#define __ARCH_PXA_MTD_XIP_H__ + +#include <mach/regs-ost.h> + +/* restored July 2017, this did not build since 2011! */ + +#define ICIP io_p2v(0x40d00000) +#define ICMR io_p2v(0x40d00004) +#define xip_irqpending() (readl(ICIP) & readl(ICMR)) + +/* we sample OSCR and convert desired delta to usec (1/4 ~= 1000000/3686400) */ +#define xip_currtime() readl(OSCR) +#define xip_elapsed_since(x) (signed)((readl(OSCR) - (x)) / 4) + +/* + * xip_cpu_idle() is used when waiting for a delay equal or larger than + * the system timer tick period. This should put the CPU into idle mode + * to save power and to be woken up only when some interrupts are pending. + * As above, this should not rely upon standard kernel code. + */ + +#define xip_cpu_idle() asm volatile ("mcr p14, 0, %0, c7, c0, 0" :: "r" (1)) + +#endif /* __ARCH_PXA_MTD_XIP_H__ */ |