[coldfire]: 2.6.31 support (WiP)

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@24087 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 186 insertions, 0 deletions

diff --git a/target/linux/coldfire/files-2.6.31/arch/m68k/include/asm/cf_page.h b/target/linux/coldfire/files-2.6.31/arch/m68k/include/asm/cf_page.h
new file mode 100644
index 000000000..1421f4943
--- /dev/null
+++ b/target/linux/coldfire/files-2.6.31/arch/m68k/include/asm/cf_page.h
@@ -0,0 +1,186 @@
+/*
+ * linux/include/asm-m68k/cf_page.h
+ *
+ * Copyright 2007-2009 Freescale Semiconductor, Inc. All Rights Reserved.
+ * Based on linux/include/asm-m68k/page.h
+ *
+ * 10/09/08 JKM: split Coldfire pieces into separate file
+ */
+#ifndef __CF_PAGE__
+#define __CF_PAGE__
+
+#include <linux/const.h>
+#include <asm/setup.h>
+#include <asm/page_offset.h>
+
+/* Virtual base page location */
+#define PAGE_OFFSET	(PAGE_OFFSET_RAW)
+
+/* PAGE_SHIFT determines the page size */
+#define PAGE_SHIFT	(13)	/* 8K pages */
+#define PAGE_SIZE	(_AC(1, UL) << PAGE_SHIFT)
+#define PAGE_MASK	(~(PAGE_SIZE-1))
+
+#define THREAD_SIZE 	PAGE_SIZE
+
+#ifndef __ASSEMBLY__
+#include <linux/compiler.h>
+#include <asm/module.h>
+
+#define get_user_page(vaddr)		__get_free_page(GFP_KERNEL)
+#define free_user_page(page, addr)	free_page(addr)
+
+#define clear_page(page)	memset((page), 0, PAGE_SIZE)
+#define copy_page(to,from)	memcpy((to), (from), PAGE_SIZE)
+
+#define clear_user_page(addr, vaddr, page)	\
+	do {	clear_page(addr);		\
+		flush_dcache_page(page);	\
+	} while (0)
+
+#define copy_user_page(to, from, vaddr, page)	\
+	do {	copy_page(to, from);		\
+		flush_dcache_page(page);	\
+	} while (0)
+
+/*
+ * These are used to make use of C type-checking..
+ */
+typedef struct { unsigned long pte; } pte_t;
+typedef struct { unsigned long pmd[16]; } pmd_t;
+typedef struct { unsigned long pgd; } pgd_t;
+typedef struct { unsigned long pgprot; } pgprot_t;
+typedef struct page *pgtable_t;
+
+#define pte_val(x)	((x).pte)
+#define pmd_val(x)	((&x)->pmd[0])
+#define pgd_val(x)	((x).pgd)
+#define pgprot_val(x)	((x).pgprot)
+
+#define __pte(x)	((pte_t) { (x) } )
+#define __pmd(x)	((pmd_t) { (x) } )
+#define __pgd(x)	((pgd_t) { (x) } )
+#define __pgprot(x)	((pgprot_t) { (x) } )
+
+/* to align the pointer to the (next) page boundary */
+/*Defined in linux/mm.h*/
+/*#define PAGE_ALIGN(addr)	(((addr)+PAGE_SIZE-1)&PAGE_MASK)*/
+
+extern unsigned long m68k_memoffset;
+
+#define WANT_PAGE_VIRTUAL
+
+extern unsigned long cf_dma_base;
+extern unsigned long cf_dma_end;
+
+/*
+ * Convert a virt to a phys
+ */
+static inline unsigned long ___pa(void *vaddr)
+{
+#if CONFIG_SDRAM_BASE != PAGE_OFFSET
+	return (((unsigned long)vaddr & 0x0fffffff) + CONFIG_SDRAM_BASE);
+#else
+	if ((unsigned long)vaddr >= CONFIG_DMA_BASE &&
+	    (unsigned long)vaddr < (CONFIG_DMA_BASE + CONFIG_DMA_SIZE)) {
+		/* address is in carved out DMA range */
+		return ((unsigned long)vaddr - CONFIG_DMA_BASE) + CONFIG_SDRAM_BASE;
+	}
+	else if ((unsigned long)vaddr >= PAGE_OFFSET &&
+		 (unsigned long)vaddr < (PAGE_OFFSET + CONFIG_SDRAM_SIZE)) {
+		/* normal mapping */
+		return ((unsigned long)vaddr - PAGE_OFFSET) + CONFIG_SDRAM_BASE;
+	}
+
+	return (unsigned long)vaddr;
+#endif
+}
+#define __pa(vaddr)	___pa((void *)(vaddr))
+
+/*
+ * Convert a phys to a virt
+ */
+static inline void *__va(unsigned long paddr)
+{
+#if CONFIG_SDRAM_BASE != PAGE_OFFSET
+	return (void *)((paddr & 0x0fffffff) + PAGE_OFFSET);
+#else
+	if (paddr >= cf_dma_base && paddr <= cf_dma_end) {
+		/* mapped address for DMA */
+		return (void *)((paddr - CONFIG_SDRAM_BASE) + CONFIG_DMA_BASE);
+	}
+	else if (paddr >= cf_dma_end &&
+		 paddr < (CONFIG_SDRAM_BASE + CONFIG_SDRAM_SIZE)) {
+		/* normal mapping */
+		return (void *)((paddr - CONFIG_SDRAM_BASE) + PAGE_OFFSET);
+	}
+	return (void *)paddr;
+#endif
+}
+
+/*
+ * NOTE: virtual isn't really correct, actually it should be the offset into the
+ * memory node, but we have no highmem, so that works for now.
+ *
+ * TODO: implement (fast) pfn<->pgdat_idx conversion functions, this makes lots
+ * of the shifts unnecessary.
+ *
+ * PFNs are used to map physical pages.  So PFN[0] maps to the base phys addr.
+ */
+#define virt_to_pfn(kaddr)	(__pa(kaddr) >> PAGE_SHIFT)
+#define pfn_to_virt(pfn)	__va((pfn) << PAGE_SHIFT)
+
+extern int m68k_virt_to_node_shift;
+
+#ifdef CONFIG_SINGLE_MEMORY_CHUNK
+#define __virt_to_node(addr)	(&pg_data_map[0])
+#else
+extern struct pglist_data *pg_data_table[];
+
+static inline __attribute_const__ int __virt_to_node_shift(void)
+{
+	return m68k_virt_to_node_shift;
+}
+
+#define __virt_to_node(addr)	(pg_data_table[(unsigned long)(addr) >> __virt_to_node_shift()])
+#endif /* !CONFIG_SINGLE_MEMORY_CHUNK */
+
+#define virt_to_page(addr) ({						\
+	pfn_to_page(virt_to_pfn(addr));					\
+})
+#define page_to_virt(page) ({						\
+	pfn_to_virt(page_to_pfn(page));					\
+})
+
+#define pfn_to_page(pfn) ({						\
+	unsigned long __pfn = (pfn);					\
+	struct pglist_data *pgdat;					\
+	pgdat = __virt_to_node((unsigned long)pfn_to_virt(__pfn));	\
+	pgdat->node_mem_map + (__pfn - pgdat->node_start_pfn);		\
+})
+#define page_to_pfn(_page) ({						\
+	struct page *__p = (_page);					\
+	struct pglist_data *pgdat;					\
+	pgdat = &pg_data_map[page_to_nid(__p)];				\
+	((__p) - pgdat->node_mem_map) + pgdat->node_start_pfn;		\
+})
+
+#define virt_addr_valid(kaddr)	( ((void *)(kaddr) >= (void *)PAGE_OFFSET && \
+				(void *)(kaddr) < high_memory) || \
+				((void *)(kaddr) >= (void*)CONFIG_DMA_BASE && \
+				(void *)(kaddr) < (void*)(CONFIG_DMA_BASE+CONFIG_DMA_SIZE)))
+
+#define pfn_valid(pfn)		virt_addr_valid(pfn_to_virt(pfn))
+
+#endif /* __ASSEMBLY__ */
+
+#define VM_DATA_DEFAULT_FLAGS	(VM_READ | VM_WRITE | VM_EXEC | \
+				 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
+
+#include <asm-generic/getorder.h>
+
+#ifdef CONFIG_VDSO
+#define __HAVE_ARCH_GATE_AREA
+#endif
+
+#endif /* __CF_PAGE__ */