Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 181 insertions, 0 deletions

diff --git a/include/asm-frv/highmem.h b/include/asm-frv/highmem.h
new file mode 100644
index 000000000000..295f74a57f22
--- /dev/null
+++ b/include/asm-frv/highmem.h
@@ -0,0 +1,181 @@
+/* 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;
+
+#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 */