unicore32 core architecture: mm related: generic codes

This patch includes generic codes for memory management.

Signed-off-by: Guan Xuetao <gxt@mprc.pku.edu.cn>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>

2 files changed, 78 insertions, 0 deletions

diff --git a/arch/unicore32/include/mach/map.h b/arch/unicore32/include/mach/map.h
new file mode 100644
index 000000000000..55c936573741
--- /dev/null
+++ b/arch/unicore32/include/mach/map.h
@@ -0,0 +1,20 @@
+/*
+ * linux/arch/unicore32/include/mach/map.h
+ *
+ * Code specific to PKUnity SoC and UniCore ISA
+ *
+ * Copyright (C) 2001-2010 GUAN Xue-tao
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ *  Page table mapping constructs and function prototypes
+ */
+#define MT_DEVICE		0
+#define MT_DEVICE_CACHED	2
+#define MT_KUSER		7
+#define MT_HIGH_VECTORS		8
+#define MT_MEMORY		9
+#define MT_ROM			10
+
diff --git a/arch/unicore32/include/mach/memory.h b/arch/unicore32/include/mach/memory.h
new file mode 100644
index 000000000000..541949dfa5b4
--- /dev/null
+++ b/arch/unicore32/include/mach/memory.h
@@ -0,0 +1,58 @@
+/*
+ * linux/arch/unicore32/include/mach/memory.h
+ *
+ * Code specific to PKUnity SoC and UniCore ISA
+ *
+ * Copyright (C) 2001-2010 GUAN Xue-tao
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef __MACH_PUV3_MEMORY_H__
+#define __MACH_PUV3_MEMORY_H__
+
+#include <mach/hardware.h>
+
+/* Physical DRAM offset. */
+#define PHYS_OFFSET	UL(0x00000000)
+/* The base address of exception vectors. */
+#define VECTORS_BASE	UL(0xffff0000)
+/* The base address of kuser area. */
+#define KUSER_BASE	UL(0x80000000)
+
+#ifdef __ASSEMBLY__
+/* The byte offset of the kernel image in RAM from the start of RAM. */
+#define KERNEL_IMAGE_START	0x00408000
+#endif
+
+#if !defined(__ASSEMBLY__) && defined(CONFIG_PCI)
+
+void puv3_pci_adjust_zones(unsigned long *size, unsigned long *holes);
+
+#define arch_adjust_zones(size, holes) \
+	puv3_pci_adjust_zones(size, holes)
+
+#endif
+
+/*
+ * PCI controller in PKUnity-3 masks highest 5-bit for upstream channel,
+ * so we must limit the DMA allocation within 128M physical memory for
+ * supporting PCI devices.
+ */
+#define PCI_DMA_THRESHOLD	(PHYS_OFFSET + SZ_128M - 1)
+
+#define is_pcibus_device(dev)	(dev &&			\
+				(strncmp(dev->bus->name, "pci", 3) == 0))
+
+#define __virt_to_pcibus(x)     (__virt_to_phys(x) + PKUNITY_PCIAHB_BASE)
+#define __pcibus_to_virt(x)     __phys_to_virt((x) - PKUNITY_PCIAHB_BASE)
+
+/* kuser area */
+#define KUSER_VECPAGE_BASE	(KUSER_BASE + UL(0x3fff0000))
+#define KUSER_UNIGFX_BASE	(KUSER_BASE + PKUNITY_UNIGFX_MMAP_BASE)
+/* kuser_vecpage (0xbfff0000) is ro, and vectors page (0xffff0000) is rw */
+#define kuser_vecpage_to_vectors(x)	((x) - (KUSER_VECPAGE_BASE)	\
+					+ (VECTORS_BASE))
+
+#endif