efDataDiscreteRateMining averageVoltageCalculation.c 张婷 commit at 2021-03-24

efDataDiscreteRateMining/averageCalculation/averageVoltageCalculation.c

@@ -377,3 +377,78 @@ void __init sa11x0_init_late(void)
  * 0xffff2000-0xffff2fff:	Minicache copy_user_page area
  *
  * Below 0xe8000000 is reserved for vm allocation.
+ *
+ * The machine specific code must provide the extra mapping beside the
+ * default mapping provided here.
+ */
+
+static struct map_desc standard_io_desc[] __initdata = {
+	{	/* PCM */
+		.virtual	=  0xf8000000,
+		.pfn		= __phys_to_pfn(0x80000000),
+		.length		= 0x00100000,
+		.type		= MT_DEVICE
+	}, {	/* SCM */
+		.virtual	=  0xfa000000,
+		.pfn		= __phys_to_pfn(0x90000000),
+		.length		= 0x00100000,
+		.type		= MT_DEVICE
+	}, {	/* MER */
+		.virtual	=  0xfc000000,
+		.pfn		= __phys_to_pfn(0xa0000000),
+		.length		= 0x00100000,
+		.type		= MT_DEVICE
+	}, {	/* LCD + DMA */
+		.virtual	=  0xfe000000,
+		.pfn		= __phys_to_pfn(0xb0000000),
+		.length		= 0x00200000,
+		.type		= MT_DEVICE
+	},
+};
+
+void __init sa1100_map_io(void)
+{
+	iotable_init(standard_io_desc, ARRAY_SIZE(standard_io_desc));
+}
+
+/*
+ * Disable the memory bus request/grant signals on the SA1110 to
+ * ensure that we don't receive spurious memory requests.  We set
+ * the MBGNT signal false to ensure the SA1111 doesn't own the
+ * SDRAM bus.
+ */
+void sa1110_mb_disable(void)
+{
+	unsigned long flags;
+
+	local_irq_save(flags);
+	
+	PGSR &= ~GPIO_MBGNT;
+	GPCR = GPIO_MBGNT;
+	GPDR = (GPDR & ~GPIO_MBREQ) | GPIO_MBGNT;
+
+	GAFR &= ~(GPIO_MBGNT | GPIO_MBREQ);
+
+	local_irq_restore(flags);
+}
+
+/*
+ * If the system is going to use the SA-1111 DMA engines, set up
+ * the memory bus request/grant pins.
+ */
+void sa1110_mb_enable(void)
+{
+	unsigned long flags;
+
+	local_irq_save(flags);
+
+	PGSR &= ~GPIO_MBGNT;
+	GPCR = GPIO_MBGNT;
+	GPDR = (GPDR & ~GPIO_MBREQ) | GPIO_MBGNT;
+
+	GAFR |= (GPIO_MBGNT | GPIO_MBREQ);
+	TUCR |= TUCR_MR;
+
+	local_irq_restore(flags);
+}
+