--- /dev/null
+/* highmem.h: virtual kernel memory mappings for high memory
+ *
+ * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ * - Derived from include/asm-i386/highmem.h
+ *
+ * See Documentation/fujitsu/frv/mmu-layout.txt for more information.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#ifndef _ASM_HIGHMEM_H
+#define _ASM_HIGHMEM_H
+
+#ifdef __KERNEL__
+
+#include <linux/config.h>
+#include <linux/init.h>
+#include <asm/mem-layout.h>
+#include <asm/spr-regs.h>
+#include <asm/mb-regs.h>
+
+#define NR_TLB_LINES 64 /* number of lines in the TLB */
+
+#ifndef __ASSEMBLY__
+
+#include <linux/interrupt.h>
+#include <asm/kmap_types.h>
+#include <asm/pgtable.h>
+
+#ifdef CONFIG_DEBUG_HIGHMEM
+#define HIGHMEM_DEBUG 1
+#else
+#define HIGHMEM_DEBUG 0
+#endif
+
+/* declarations for highmem.c */
+extern unsigned long highstart_pfn, highend_pfn;
+
+#define kmap_prot PAGE_KERNEL
+#define kmap_pte ______kmap_pte_in_TLB
+extern pte_t *pkmap_page_table;
+
+extern void kmap_init(void);
+
+#define flush_cache_kmaps() do { } while (0)
+
+/*
+ * Right now we initialize only a single pte table. It can be extended
+ * easily, subsequent pte tables have to be allocated in one physical
+ * chunk of RAM.
+ */
+#define LAST_PKMAP PTRS_PER_PTE
+#define LAST_PKMAP_MASK (LAST_PKMAP - 1)
+#define PKMAP_NR(virt) ((virt - PKMAP_BASE) >> PAGE_SHIFT)
+#define PKMAP_ADDR(nr) (PKMAP_BASE + ((nr) << PAGE_SHIFT))
+
+extern void *kmap_high(struct page *page);
+extern void kunmap_high(struct page *page);
+
+extern void *kmap(struct page *page);
+extern void kunmap(struct page *page);
+
+extern struct page *kmap_atomic_to_page(void *ptr);
+
+#endif /* !__ASSEMBLY__ */
+
+/*
+ * The use of kmap_atomic/kunmap_atomic is discouraged - kmap/kunmap
+ * gives a more generic (and caching) interface. But kmap_atomic can
+ * be used in IRQ contexts, so in some (very limited) cases we need
+ * it.
+ */
+#define KMAP_ATOMIC_CACHE_DAMR 8
+
+#ifndef __ASSEMBLY__
+
+#define __kmap_atomic_primary(type, paddr, ampr) \
+({ \
+ unsigned long damlr, dampr; \
+ \
+ dampr = paddr | xAMPRx_L | xAMPRx_M | xAMPRx_S | xAMPRx_SS_16Kb | xAMPRx_V; \
+ \
+ if (type != __KM_CACHE) \
+ asm volatile("movgs %0,dampr"#ampr :: "r"(dampr)); \
+ else \
+ asm volatile("movgs %0,iampr"#ampr"\n" \
+ "movgs %0,dampr"#ampr"\n" \
+ :: "r"(dampr) \
+ ); \
+ \
+ asm("movsg damlr"#ampr",%0" : "=r"(damlr)); \
+ \
+ /*printk("DAMR"#ampr": PRIM sl=%d L=%08lx P=%08lx\n", type, damlr, dampr);*/ \
+ \
+ (void *) damlr; \
+})
+
+#define __kmap_atomic_secondary(slot, paddr) \
+({ \
+ unsigned long damlr = KMAP_ATOMIC_SECONDARY_FRAME + (slot) * PAGE_SIZE; \
+ unsigned long dampr = paddr | xAMPRx_L | xAMPRx_M | xAMPRx_S | xAMPRx_SS_16Kb | xAMPRx_V; \
+ \
+ asm volatile("movgs %0,tplr \n" \
+ "movgs %1,tppr \n" \
+ "tlbpr %0,gr0,#2,#1" \
+ : : "r"(damlr), "r"(dampr)); \
+ \
+ /*printk("TLB: SECN sl=%d L=%08lx P=%08lx\n", slot, damlr, dampr);*/ \
+ \
+ (void *) damlr; \
+})
+
+static inline void *kmap_atomic(struct page *page, enum km_type type)
+{
+ unsigned long paddr;
+
+ preempt_disable();
+ paddr = page_to_phys(page);
+
+ switch (type) {
+ case 0: return __kmap_atomic_primary(0, paddr, 2);
+ case 1: return __kmap_atomic_primary(1, paddr, 3);
+ case 2: return __kmap_atomic_primary(2, paddr, 4);
+ case 3: return __kmap_atomic_primary(3, paddr, 5);
+ case 4: return __kmap_atomic_primary(4, paddr, 6);
+ case 5: return __kmap_atomic_primary(5, paddr, 7);
+ case 6: return __kmap_atomic_primary(6, paddr, 8);
+ case 7: return __kmap_atomic_primary(7, paddr, 9);
+ case 8: return __kmap_atomic_primary(8, paddr, 10);
+
+ case 9 ... 9 + NR_TLB_LINES - 1:
+ return __kmap_atomic_secondary(type - 9, paddr);
+
+ default:
+ BUG();
+ return 0;
+ }
+}
+
+#define __kunmap_atomic_primary(type, ampr) \
+do { \
+ asm volatile("movgs gr0,dampr"#ampr"\n"); \
+ if (type == __KM_CACHE) \
+ asm volatile("movgs gr0,iampr"#ampr"\n"); \
+} while(0)
+
+#define __kunmap_atomic_secondary(slot, vaddr) \
+do { \
+ asm volatile("tlbpr %0,gr0,#4,#1" : : "r"(vaddr)); \
+} while(0)
+
+static inline void kunmap_atomic(void *kvaddr, enum km_type type)
+{
+ switch (type) {
+ case 0: __kunmap_atomic_primary(0, 2); break;
+ case 1: __kunmap_atomic_primary(1, 3); break;
+ case 2: __kunmap_atomic_primary(2, 4); break;
+ case 3: __kunmap_atomic_primary(3, 5); break;
+ case 4: __kunmap_atomic_primary(4, 6); break;
+ case 5: __kunmap_atomic_primary(5, 7); break;
+ case 6: __kunmap_atomic_primary(6, 8); break;
+ case 7: __kunmap_atomic_primary(7, 9); break;
+ case 8: __kunmap_atomic_primary(8, 10); break;
+
+ case 9 ... 9 + NR_TLB_LINES - 1:
+ __kunmap_atomic_secondary(type - 9, kvaddr);
+ break;
+
+ default:
+ BUG();
+ }
+ preempt_enable();
+}
+
+#endif /* !__ASSEMBLY__ */
+
+#endif /* __KERNEL__ */
+
+#endif /* _ASM_HIGHMEM_H */
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