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authorArnd Bergmann <arnd@arndb.de>2019-08-06 17:16:03 +0300
committerArnd Bergmann <arnd@arndb.de>2022-04-22 12:08:55 +0300
commit7e0a9e622dbe465f66cb1841d071acfe9ceaa32f (patch)
treea35ed964613fd5cfcc1dd717eb870d899073c628 /arch/arm/mach-omap1/mtd-xip.h
parentdf99e7bbbec3180693b3d932a9cbc88346e2a30e (diff)
downloadlinux-7e0a9e622dbe465f66cb1841d071acfe9ceaa32f.tar.xz
ARM: omap1: move mach/*.h into mach directory
Most of the header files are no longer referenced from outside arch/arm/mach-omap1, so move them all to that place directly and change their users to use the new location. The exceptions are: - mach/compress.h is used by the core architecture code - mach/serial.h is used by mach/compress.h The mach/memory.h is empty and gets removed in the process, avoiding the need for CONFIG_NEED_MACH_MEMORY_H. Acked-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'arch/arm/mach-omap1/mtd-xip.h')
-rw-r--r--arch/arm/mach-omap1/mtd-xip.h62
1 files changed, 62 insertions, 0 deletions
diff --git a/arch/arm/mach-omap1/mtd-xip.h b/arch/arm/mach-omap1/mtd-xip.h
new file mode 100644
index 000000000000..b675d501b13d
--- /dev/null
+++ b/arch/arm/mach-omap1/mtd-xip.h
@@ -0,0 +1,62 @@
+/*
+ * MTD primitives for XIP support. Architecture specific functions.
+ *
+ * Do not include this file directly. It's included from linux/mtd/xip.h
+ *
+ * Author: Vladimir Barinov <vbarinov@embeddedalley.com>
+ *
+ * (c) 2005 MontaVista Software, Inc. This file is licensed under the
+ * terms of the GNU General Public License version 2. This program is
+ * licensed "as is" without any warranty of any kind, whether express or
+ * implied.
+ */
+
+#ifndef __ARCH_OMAP_MTD_XIP_H__
+#define __ARCH_OMAP_MTD_XIP_H__
+
+#include "hardware.h"
+#include <linux/soc/ti/omap1-io.h>
+#define OMAP_MPU_TIMER_BASE (0xfffec500)
+#define OMAP_MPU_TIMER_OFFSET 0x100
+
+typedef struct {
+ u32 cntl; /* CNTL_TIMER, R/W */
+ u32 load_tim; /* LOAD_TIM, W */
+ u32 read_tim; /* READ_TIM, R */
+} xip_omap_mpu_timer_regs_t;
+
+#define xip_omap_mpu_timer_base(n) \
+((volatile xip_omap_mpu_timer_regs_t*)OMAP1_IO_ADDRESS(OMAP_MPU_TIMER_BASE + \
+ (n)*OMAP_MPU_TIMER_OFFSET))
+
+static inline unsigned long xip_omap_mpu_timer_read(int nr)
+{
+ volatile xip_omap_mpu_timer_regs_t* timer = xip_omap_mpu_timer_base(nr);
+ return timer->read_tim;
+}
+
+#define xip_irqpending() \
+ (omap_readl(OMAP_IH1_ITR) & ~omap_readl(OMAP_IH1_MIR))
+#define xip_currtime() (~xip_omap_mpu_timer_read(0))
+
+/*
+ * It's permitted to do approximation for xip_elapsed_since macro
+ * (see linux/mtd/xip.h)
+ */
+
+#ifdef CONFIG_MACH_OMAP_PERSEUS2
+#define xip_elapsed_since(x) (signed)((~xip_omap_mpu_timer_read(0) - (x)) / 7)
+#else
+#define xip_elapsed_since(x) (signed)((~xip_omap_mpu_timer_read(0) - (x)) / 6)
+#endif
+
+/*
+ * 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 p15, 0, %0, c7, c0, 4" :: "r" (1))
+
+#endif /* __ARCH_OMAP_MTD_XIP_H__ */