Ralf,
Here is the 2.6 36 bit I/O support patch. We beat up on it quite a bit and it seems solid on the Au1x (Db1500 board).
Pete
Index: arch/mips/au1000/common/setup.c
===================================================================
RCS file: /home/cvs/linux/arch/mips/au1000/common/setup.c,v
retrieving revision 1.17
diff -u -r1.17 setup.c
--- arch/mips/au1000/common/setup.c 14 Sep 2004 06:38:46 -0000 1.17
+++ arch/mips/au1000/common/setup.c 19 Sep 2004 22:51:20 -0000
@@ -56,10 +56,6 @@
extern void au1x_time_init(void);
extern void (*board_timer_setup)(struct irqaction *irq);
extern void au1x_timer_setup(struct irqaction *irq);
-#if defined(CONFIG_64BIT_PHYS_ADDR) && (defined(CONFIG_SOC_AU1500) || defined(CONFIG_SOC_AU1550))
-extern phys_t (*fixup_bigphys_addr)(phys_t phys_addr, phys_t size);
-static phys_t au1500_fixup_bigphys_addr(phys_t phys_addr, phys_t size);
-#endif
extern void au1xxx_time_init(void);
extern void au1xxx_timer_setup(struct irqaction *irq);
extern void set_cpuspec(void);
@@ -147,9 +143,6 @@
_machine_power_off = au1000_power_off;
board_time_init = au1xxx_time_init;
board_timer_setup = au1xxx_timer_setup;
-#if defined(CONFIG_64BIT_PHYS_ADDR) && (defined(CONFIG_SOC_AU1500) || defined(CONFIG_SOC_AU1550))
- fixup_bigphys_addr = au1500_fixup_bigphys_addr;
-#endif
/* IO/MEM resources. */ set_io_port_base(0); @@ -200,7 +193,7 @@
#if defined(CONFIG_64BIT_PHYS_ADDR) && (defined(CONFIG_SOC_AU1500) || defined(CONFIG_SOC_AU1550))
/* This routine should be valid for all Au1500 based boards */
-static phys_t au1500_fixup_bigphys_addr(phys_t phys_addr, phys_t size)
+phys_t fixup_bigphys_addr(phys_t phys_addr, phys_t size)
{
u32 pci_start = (u32)Au1500_PCI_MEM_START;
u32 pci_end = (u32)Au1500_PCI_MEM_END;
Index: arch/mips/mm/Makefile
===================================================================
RCS file: /home/cvs/linux/arch/mips/mm/Makefile,v
retrieving revision 1.68
diff -u -r1.68 Makefile
--- arch/mips/mm/Makefile 20 Jun 2004 23:52:17 -0000 1.68
+++ arch/mips/mm/Makefile 19 Sep 2004 22:51:21 -0000
@@ -41,10 +41,11 @@
obj-$(CONFIG_CPU_RM7000) += tlbex32-r4k.o
obj-$(CONFIG_CPU_RM9000) += tlbex32-r4k.o
obj-$(CONFIG_CPU_R10000) += tlbex32-r4k.o
-obj-$(CONFIG_CPU_MIPS32) += tlbex32-r4k.o
+obj-$(CONFIG_CPU_MIPS32) += tlbex32-mips32.o
obj-$(CONFIG_CPU_MIPS64) += tlbex32-r4k.o
obj-$(CONFIG_CPU_SB1) += tlbex32-r4k.o
obj-$(CONFIG_CPU_TX39XX) += tlbex32-r3k.o
+obj-$(CONFIG_64BIT_PHYS_ADDR) += remap.o
endif
ifdef CONFIG_MIPS64
obj-$(CONFIG_CPU_R4300) += tlb64-glue-r4k.o tlbex64-r4k.o
Index: arch/mips/mm/ioremap.c
===================================================================
RCS file: /home/cvs/linux/arch/mips/mm/ioremap.c,v
retrieving revision 1.19
diff -u -r1.19 ioremap.c
--- arch/mips/mm/ioremap.c 19 Apr 2004 16:36:35 -0000 1.19
+++ arch/mips/mm/ioremap.c 19 Sep 2004 22:51:21 -0000
@@ -97,6 +97,15 @@
}
/*
+ * Allow physical addresses to be fixed up to help 36 bit peripherals.
+ */
+phys_t __attribute__ ((weak))
+fixup_bigphys_addr(phys_t phys_addr, phys_t size)
+{
+ return phys_addr;
+}
+
+/*
* Generic mapping function (not visible outside):
*/@@ -110,7 +119,7 @@ * caller shouldn't need to know that small detail. */
-#define IS_LOW512(addr) (!((phys_t)(addr) & ~0x1fffffffUL)) +#define IS_LOW512(addr) (!((phys_t)(addr) & (phys_t) ~0x1fffffffULL))
void * __ioremap(phys_t phys_addr, phys_t size, unsigned long flags)
{
@@ -119,6 +128,8 @@
phys_t last_addr;
void * addr;+ phys_addr = fixup_bigphys_addr(phys_addr, size); + /* Don't allow wraparound or zero size */ last_addr = phys_addr + size - 1; if (!size || last_addr < phys_addr) @@ -190,3 +201,4 @@
EXPORT_SYMBOL(__ioremap);
EXPORT_SYMBOL(__iounmap);
+EXPORT_SYMBOL(fixup_bigphys_addr);
Index: arch/mips/mm/remap.c
===================================================================
RCS file: arch/mips/mm/remap.c
diff -N arch/mips/mm/remap.c
--- /dev/null 1 Jan 1970 00:00:00 -0000
+++ arch/mips/mm/remap.c 19 Sep 2004 22:51:21 -0000
@@ -0,0 +1,115 @@
+/*
+ * arch/mips/mm/remap.c
+ *
+ * A copy of mm/memory.c, with mods for 64 bit physical I/O addresses on
+ * 32 bit native word platforms.
+ * Copyright (C) 1991, 1992, 1993, 1994 Linus Torvalds
+ */
+
+
+#include <linux/kernel_stat.h>
+#include <linux/mm.h>
+#include <linux/hugetlb.h>
+#include <linux/mman.h>
+#include <linux/swap.h>
+#include <linux/highmem.h>
+#include <linux/pagemap.h>
+#include <linux/rmap.h>
+#include <linux/module.h>
+#include <linux/init.h>
+
+#include <asm/pgalloc.h>
+#include <asm/uaccess.h>
+#include <asm/tlb.h>
+#include <asm/tlbflush.h>
+#include <asm/pgtable.h>
+
+#include <linux/swapops.h>
+#include <linux/elf.h>
+
+
+/*
+ * maps a range of physical memory into the requested pages. the old
+ * mappings are removed. any references to nonexistent pages results
+ * in null mappings (currently treated as "copy-on-access")
+ */
+static inline void remap_pte_range(pte_t * pte, unsigned long address, unsigned long size,
+ phys_t phys_addr, pgprot_t prot)
+{
+ unsigned long end;
+ unsigned long pfn;
+
+ address &= ~PMD_MASK;
+ end = address + size;
+ if (end > PMD_SIZE)
+ end = PMD_SIZE;
+ pfn = phys_addr >> PAGE_SHIFT;
+ do {
+ BUG_ON(!pte_none(*pte));
+ if (!pfn_valid(pfn) || PageReserved(pfn_to_page(pfn)))
+ set_pte(pte, pfn_pte(pfn, prot));
+ address += PAGE_SIZE;
+ pfn++;
+ pte++;
+ } while (address && (address < end));
+}
+
+static inline int remap_pmd_range(struct mm_struct *mm, pmd_t * pmd, unsigned long address, unsigned long size,
+ phys_t phys_addr, pgprot_t prot)
+{
+ unsigned long base, end;
+
+ base = address & PGDIR_MASK;
+ address &= ~PGDIR_MASK;
+ end = address + size;
+ if (end > PGDIR_SIZE)
+ end = PGDIR_SIZE;
+ phys_addr -= address;
+ do {
+ pte_t * pte = pte_alloc_map(mm, pmd, base + address);
+ if (!pte)
+ return -ENOMEM;
+ remap_pte_range(pte, base + address, end - address, address + phys_addr, prot);
+ pte_unmap(pte);
+ address = (address + PMD_SIZE) & PMD_MASK;
+ pmd++;
+ } while (address && (address < end));
+ return 0;
+}
+
+/* Note: this is only safe if the mm semaphore is held when called. */
+int remap_page_range_high(struct vm_area_struct *vma, unsigned long from, phys_t phys_addr, unsigned long size, pgprot_t prot)
+{
+ int error = 0;
+ pgd_t * dir;
+ unsigned long beg = from;
+ unsigned long end = from + size;
+ struct mm_struct *mm = vma->vm_mm;
+
+ phys_addr -= from;
+ dir = pgd_offset(mm, from);
+ flush_cache_range(vma, beg, end);
+ if (from >= end)
+ BUG();
+
+ spin_lock(&mm->page_table_lock);
+ do {
+ pmd_t *pmd = pmd_alloc(mm, dir, from);
+ error = -ENOMEM;
+ if (!pmd)
+ break;
+ error = remap_pmd_range(mm, pmd, from, end - from, phys_addr + from, prot);
+ if (error)
+ break;
+ from = (from + PGDIR_SIZE) & PGDIR_MASK;
+ dir++;
+ } while (from && (from < end));
+ /*
+ * Why flush? remap_pte_range has a BUG_ON for !pte_none()
+ */
+ flush_tlb_range(vma, beg, end);
+ spin_unlock(&mm->page_table_lock);
+ return error;
+}
+
+EXPORT_SYMBOL(remap_page_range_high);
Index: arch/mips/mm/tlb-r4k.c
===================================================================
RCS file: /home/cvs/linux/arch/mips/mm/tlb-r4k.c,v
retrieving revision 1.38
diff -u -r1.38 tlb-r4k.c
--- arch/mips/mm/tlb-r4k.c 19 Mar 2004 04:07:59 -0000 1.38
+++ arch/mips/mm/tlb-r4k.c 19 Sep 2004 22:51:21 -0000
@@ -255,8 +255,14 @@
idx = read_c0_index();
ptep = pte_offset_map(pmdp, address);
- write_c0_entrylo0(pte_val(*ptep++) >> 6);
- write_c0_entrylo1(pte_val(*ptep) >> 6);
+ #if defined(CONFIG_64BIT_PHYS_ADDR) && defined(CONFIG_CPU_MIPS32)
+ write_c0_entrylo0(ptep->pte_high);
+ ptep++;
+ write_c0_entrylo1(ptep->pte_high);
+#else
+ write_c0_entrylo0(pte_val(*ptep++) >> 6);
+ write_c0_entrylo1(pte_val(*ptep) >> 6);
+#endif
write_c0_entryhi(address | pid);
mtc0_tlbw_hazard();
if (idx < 0)
Index: arch/mips/mm/tlbex32-mips32.S
===================================================================
RCS file: arch/mips/mm/tlbex32-mips32.S
diff -N arch/mips/mm/tlbex32-mips32.S
--- /dev/null 1 Jan 1970 00:00:00 -0000
+++ arch/mips/mm/tlbex32-mips32.S 19 Sep 2004 22:51:21 -0000
@@ -0,0 +1,325 @@
+/*
+ * TLB exception handling code for MIPS32 CPUs.
+ *
+ * Copyright (C) 1994, 1995, 1996 by Ralf Baechle and Andreas Busse
+ *
+ * Multi-cpu abstraction and reworking:
+ * Copyright (C) 1996 David S. Miller (dm@xxxxxxxxxxxx)
+ *
+ * Carsten Langgaard, carstenl@xxxxxxxx
+ * Copyright (C) 2000 MIPS Technologies, Inc. All rights reserved.
+ *
+ * Pete Popov, ppopov@xxxxxxxxxxx
+ * Added 36 bit phys address support.
+ * Copyright (C) 2002 MontaVista Software, Inc.
+ */
+#include <linux/init.h>
+#include <asm/asm.h>
+#include <asm/cachectl.h>
+#include <asm/fpregdef.h>
+#include <asm/mipsregs.h>
+#include <asm/page.h>
+#include <asm/pgtable-bits.h>
+#include <asm/regdef.h>
+#include <asm/stackframe.h>
+
+#define TLB_OPTIMIZE /* If you are paranoid, disable this. */
+
+#ifdef CONFIG_64BIT_PHYS_ADDR
+
+/* We really only support 36 bit physical addresses on MIPS32 */
+#define PTE_L lw
+#define PTE_S sw
+#define PTE_SRL srl
+#define P_MTC0 mtc0
+#define PTE_HALF 4 /* pte_high contains pre-shifted, ready to go entry */
+#define PTE_SIZE 8
+#define PTEP_INDX_MSK 0xff0
+#define PTE_INDX_MSK 0xff8
+#define PTE_INDX_SHIFT 9
+#define CONVERT_PTE(pte)
+#define PTE_MAKEWRITE_HIGH(pte, ptr) \
+ lw pte, 4(ptr); \
+ ori pte, (_PAGE_VALID | _PAGE_DIRTY); \
+ sw pte, 4(ptr); \
+ lw pte, 0(ptr);
+
+#define PTE_MAKEVALID_HIGH(pte, ptr) \
+ lw pte, 4(ptr); \
+ ori pte, pte, _PAGE_VALID; \
+ sw pte, 4(ptr); \
+ lw pte, 0(ptr);
+
+#else
+
+#define PTE_L lw
+#define PTE_S sw
+#define PTE_SRL srl
+#define P_MTC0 mtc0
+#define PTE_HALF 0
+#define PTE_SIZE 4
+#define PTEP_INDX_MSK 0xff8
+#define PTE_INDX_MSK 0xffc
+#define PTE_INDX_SHIFT 10
+#define CONVERT_PTE(pte) srl pte, pte, 6
+#define PTE_MAKEWRITE_HIGH(pte, ptr)
+#define PTE_MAKEVALID_HIGH(pte, ptr)
+
+#endif /* CONFIG_64BIT_PHYS_ADDR */
+
+ __INIT
+
+#ifdef CONFIG_64BIT_PHYS_ADDR
+#define GET_PTE_OFF(reg)
+#else
+#define GET_PTE_OFF(reg) srl reg, reg, 1
+#endif
+
+/*
+ * These handlers much be written in a relocatable manner
+ * because based upon the cpu type an arbitrary one of the
+ * following pieces of code will be copied to the KSEG0
+ * vector location.
+ */
+ /* TLB refill, EXL == 0, MIPS32 version */
+ .set noreorder
+ .set noat
+ LEAF(except_vec0_r4000)
+ .set mips3
+#ifdef CONFIG_SMP
+ mfc0 k1, CP0_CONTEXT
+ la k0, pgd_current
+ srl k1, 23
+ sll k1, 2 # log2(sizeof(pgd_t)
+ addu k1, k0, k1
+ lw k1, (k1)
+#else
+ lw k1, pgd_current # get pgd pointer
+#endif
+ nop
+ mfc0 k0, CP0_BADVADDR # Get faulting address
+ srl k0, k0, _PGDIR_SHIFT # get pgd only bits
+
+ sll k0, k0, 2
+ addu k1, k1, k0 # add in pgd offset
+ mfc0 k0, CP0_CONTEXT # get context reg
+ lw k1, (k1)
+ GET_PTE_OFF(k0) # get pte offset
+ and k0, k0, PTEP_INDX_MSK
+ addu k1, k1, k0 # add in offset
+
+ PTE_L k0, PTE_HALF(k1) # get even pte
+ CONVERT_PTE(k0)
+ P_MTC0 k0, CP0_ENTRYLO0 # load it
+ PTE_L k1, (PTE_HALF+PTE_SIZE)(k1) # get odd pte
+ CONVERT_PTE(k1)
+ P_MTC0 k1, CP0_ENTRYLO1 # load it
+ b 1f
+ tlbwr # write random tlb entry
+1:
+ nop
+ eret # return from trap
+ END(except_vec0_r4000)
+
+/*
+ * These are here to avoid putting ifdefs in tlb-r4k.c
+ */
+ .set noreorder
+ .set noat
+ LEAF(except_vec0_nevada)
+ .set mips3
+ PANIC("Nevada Exception Vec 0 called")
+ END(except_vec0_nevada)
+
+ .set noreorder
+ .set noat
+ LEAF(except_vec0_r4600)
+ .set mips3
+ PANIC("R4600 Exception Vec 0 called")
+ END(except_vec0_r4600)
+
+ __FINIT
+
+/*
+ * ABUSE of CPP macros 101.
+ *
+ * After this macro runs, the pte faulted on is
+ * in register PTE, a ptr into the table in which
+ * the pte belongs is in PTR.
+ */
+
+#ifdef CONFIG_SMP
+#define GET_PGD(scratch, ptr) \
+ mfc0 ptr, CP0_CONTEXT; \
+ la scratch, pgd_current;\
+ srl ptr, 23; \
+ sll ptr, 2; \
+ addu ptr, scratch, ptr; \
+ lw ptr, (ptr);
+#else
+#define GET_PGD(scratch, ptr) \
+ lw ptr, pgd_current;
+#endif
+
+#define LOAD_PTE(pte, ptr) \
+ GET_PGD(pte, ptr) \
+ mfc0 pte, CP0_BADVADDR; \
+ srl pte, pte, _PGDIR_SHIFT; \
+ sll pte, pte, 2; \
+ addu ptr, ptr, pte; \
+ mfc0 pte, CP0_BADVADDR; \
+ lw ptr, (ptr); \
+ srl pte, pte, PTE_INDX_SHIFT; \
+ and pte, pte, PTE_INDX_MSK; \
+ addu ptr, ptr, pte; \
+ PTE_L pte, (ptr);
+
+ /* This places the even/odd pte pair in the page
+ * table at PTR into ENTRYLO0 and ENTRYLO1 using
+ * TMP as a scratch register.
+ */
+#define PTE_RELOAD(ptr, tmp) \
+ ori ptr, ptr, PTE_SIZE; \
+ xori ptr, ptr, PTE_SIZE; \
+ PTE_L tmp, (PTE_HALF+PTE_SIZE)(ptr); \
+ CONVERT_PTE(tmp); \
+ P_MTC0 tmp, CP0_ENTRYLO1; \
+ PTE_L ptr, PTE_HALF(ptr); \
+ CONVERT_PTE(ptr); \
+ P_MTC0 ptr, CP0_ENTRYLO0;
+
+#define DO_FAULT(write) \
+ .set noat; \
+ SAVE_ALL; \
+ mfc0 a2, CP0_BADVADDR; \
+ STI; \
+ .set at; \
+ move a0, sp; \
+ jal do_page_fault; \
+ li a1, write; \
+ j ret_from_exception; \
+ nop; \
+ .set noat;
+
+ /* Check is PTE is present, if not then jump to LABEL.
+ * PTR points to the page table where this PTE is located,
+ * when the macro is done executing PTE will be restored
+ * with it's original value.
+ */
+#define PTE_PRESENT(pte, ptr, label) \
+ andi pte, pte, (_PAGE_PRESENT | _PAGE_READ); \
+ xori pte, pte, (_PAGE_PRESENT | _PAGE_READ); \
+ bnez pte, label; \
+ PTE_L pte, (ptr);
+
+ /* Make PTE valid, store result in PTR. */
+#define PTE_MAKEVALID(pte, ptr) \
+ ori pte, pte, (_PAGE_VALID | _PAGE_ACCESSED); \
+ PTE_S pte, (ptr);
+
+ /* Check if PTE can be written to, if not branch to LABEL.
+ * Regardless restore PTE with value from PTR when done.
+ */
+#define PTE_WRITABLE(pte, ptr, label) \
+ andi pte, pte, (_PAGE_PRESENT | _PAGE_WRITE); \
+ xori pte, pte, (_PAGE_PRESENT | _PAGE_WRITE); \
+ bnez pte, label; \
+ PTE_L pte, (ptr);
+
+ /* Make PTE writable, update software status bits as well,
+ * then store at PTR.
+ */
+#define PTE_MAKEWRITE(pte, ptr) \
+ ori pte, pte, (_PAGE_ACCESSED | _PAGE_MODIFIED | \
+ _PAGE_VALID | _PAGE_DIRTY); \
+ PTE_S pte, (ptr);
+
+ .set noreorder
+
+#define R5K_HAZARD nop
+
+ .align 5
+ NESTED(handle_tlbl, PT_SIZE, sp)
+ .set noat
+invalid_tlbl:
+#ifdef TLB_OPTIMIZE
+ /* Test present bit in entry. */
+ LOAD_PTE(k0, k1)
+ R5K_HAZARD
+ tlbp
+ PTE_PRESENT(k0, k1, nopage_tlbl)
+ PTE_MAKEVALID_HIGH(k0, k1)
+ PTE_MAKEVALID(k0, k1)
+ PTE_RELOAD(k1, k0)
+ nop
+ b 1f
+ tlbwi
+1:
+ nop
+ .set mips3
+ eret
+ .set mips0
+#endif
+
+nopage_tlbl:
+ DO_FAULT(0)
+ END(handle_tlbl)
+
+ .align 5
+ NESTED(handle_tlbs, PT_SIZE, sp)
+ .set noat
+#ifdef TLB_OPTIMIZE
+ .set mips3
+ li k0,0
+ LOAD_PTE(k0, k1)
+ R5K_HAZARD
+ tlbp # find faulting entry
+ PTE_WRITABLE(k0, k1, nopage_tlbs)
+ PTE_MAKEWRITE(k0, k1)
+ PTE_MAKEWRITE_HIGH(k0, k1)
+ PTE_RELOAD(k1, k0)
+ nop
+ b 1f
+ tlbwi
+1:
+ nop
+ .set mips3
+ eret
+ .set mips0
+#endif
+
+nopage_tlbs:
+ DO_FAULT(1)
+ END(handle_tlbs)
+
+ .align 5
+ NESTED(handle_mod, PT_SIZE, sp)
+ .set noat
+#ifdef TLB_OPTIMIZE
+ .set mips3
+ LOAD_PTE(k0, k1)
+ R5K_HAZARD
+ tlbp # find faulting entry
+ andi k0, k0, _PAGE_WRITE
+ beqz k0, nowrite_mod
+ PTE_L k0, (k1)
+
+ /* Present and writable bits set, set accessed and dirty bits. */
+ PTE_MAKEWRITE(k0, k1)
+ PTE_MAKEWRITE_HIGH(k0, k1)
+ /* Now reload the entry into the tlb. */
+ PTE_RELOAD(k1, k0)
+ nop
+ b 1f
+ tlbwi
+1:
+ nop
+ .set mips3
+ eret
+ .set mips0
+#endif
+
+nowrite_mod:
+ DO_FAULT(1)
+ END(handle_mod)
+
Index: include/asm-mips/addrspace.h
===================================================================
RCS file: /home/cvs/linux/include/asm-mips/addrspace.h,v
retrieving revision 1.13
diff -u -r1.13 addrspace.h
--- include/asm-mips/addrspace.h 30 Nov 2003 01:52:25 -0000 1.13
+++ include/asm-mips/addrspace.h 19 Sep 2004 22:51:28 -0000
@@ -80,7 +80,11 @@
#define XKSSEG 0x4000000000000000
#define XKPHYS 0x8000000000000000
#define XKSEG 0xc000000000000000
+#if defined(CONFIG_64BIT_PHYS_ADDR) && defined(CONFIG_CPU_MIPS32)
+#define CKSEG0 0x80000000
+#else
#define CKSEG0 0xffffffff80000000
+#endif
#define CKSEG1 0xffffffffa0000000
#define CKSSEG 0xffffffffc0000000
#define CKSEG3 0xffffffffe0000000
Index: include/asm-mips/io.h
===================================================================
RCS file: /home/cvs/linux/include/asm-mips/io.h,v
retrieving revision 1.72
diff -u -r1.72 io.h
--- include/asm-mips/io.h 19 Aug 2004 15:27:41 -0000 1.72
+++ include/asm-mips/io.h 19 Sep 2004 22:51:29 -0000
@@ -171,7 +171,7 @@
extern void * __ioremap(phys_t offset, phys_t size, unsigned long flags);
extern void __iounmap(void *addr);
-static inline void * __ioremap_mode(unsigned long offset, unsigned long size,
+static inline void * __ioremap_mode(phys_t offset, unsigned long size,
unsigned long flags)
{
if (cpu_has_64bit_addresses) {
Index: include/asm-mips/page.h
===================================================================
RCS file: /home/cvs/linux/include/asm-mips/page.h,v
retrieving revision 1.44
diff -u -r1.44 page.h
--- include/asm-mips/page.h 20 Aug 2004 12:02:18 -0000 1.44
+++ include/asm-mips/page.h 19 Sep 2004 22:51:29 -0000
@@ -32,7 +32,7 @@
#ifdef CONFIG_PAGE_SIZE_64KB
#define PAGE_SHIFT 16
#endif
-#define PAGE_SIZE (1UL << PAGE_SHIFT)
+#define PAGE_SIZE (1L << PAGE_SHIFT)
#define PAGE_MASK (~(PAGE_SIZE-1))
#ifdef __KERNEL__
@@ -75,15 +75,22 @@
* These are used to make use of C type-checking..
*/
#ifdef CONFIG_64BIT_PHYS_ADDR
-typedef struct { unsigned long long pte; } pte_t;
+ #ifdef CONFIG_CPU_MIPS32
+ typedef struct { unsigned long pte_low, pte_high; } pte_t;
+ #define pte_val(x) ((x).pte_low | ((unsigned long long)(x).pte_high << 32))
+ #else
+ typedef struct { unsigned long long pte; } pte_t;
+ #define pte_val(x) ((x).pte)
+ #endif
#else
typedef struct { unsigned long pte; } pte_t;
+#define pte_val(x) ((x).pte)
#endif
+
typedef struct { unsigned long pmd; } pmd_t;
typedef struct { unsigned long pgd; } pgd_t;
typedef struct { unsigned long pgprot; } pgprot_t;
-#define pte_val(x) ((x).pte)
#define pmd_val(x) ((x).pmd)
#define pgd_val(x) ((x).pgd)
#define pgprot_val(x) ((x).pgprot)
Index: include/asm-mips/pgtable-32.h
===================================================================
RCS file: /home/cvs/linux/include/asm-mips/pgtable-32.h,v
retrieving revision 1.11
diff -u -r1.11 pgtable-32.h
--- include/asm-mips/pgtable-32.h 26 Jun 2004 15:15:24 -0000 1.11
+++ include/asm-mips/pgtable-32.h 19 Sep 2004 22:51:29 -0000
@@ -130,8 +130,21 @@
static inline int pgd_present(pgd_t pgd) { return 1; }
static inline void pgd_clear(pgd_t *pgdp) { }+#if defined(CONFIG_64BIT_PHYS_ADDR) && defined(CONFIG_MIPS32)
#define pte_page(x) pfn_to_page(pte_pfn(x))
+#define pte_pfn(x) ((unsigned long)((x).pte_high >> 6))
+static inline pte_t
+pfn_pte(unsigned long pfn, pgprot_t prot)
+{
+ pte_t pte;
+ pte.pte_high = (pfn << 6) | (pgprot_val(prot) & 0x3f);
+ pte.pte_low = pgprot_val(prot);
+ return pte;
+}
+
+#else+#define pte_page(x) pfn_to_page(pte_pfn(x))
#ifdef CONFIG_CPU_VR41XX #define pte_pfn(x) ((unsigned long)((x).pte >> (PAGE_SHIFT + 2))) @@ -140,6 +153,7 @@ #define pte_pfn(x) ((unsigned long)((x).pte >> PAGE_SHIFT)) #define pfn_pte(pfn, prot) __pte(((pfn) << PAGE_SHIFT) | pgprot_val(prot)) #endif +#endif /* defined(CONFIG_64BIT_PHYS_ADDR) && defined(CONFIG_MIPS32) */
#define __pgd_offset(address) pgd_index(address)
#define __pmd_offset(address) (((address) >> PMD_SHIFT) & (PTRS_PER_PMD-1))
@@ -207,11 +221,19 @@
*/
#define PTE_FILE_MAX_BITS 27
+#if defined(CONFIG_64BIT_PHYS_ADDR) && defined(CONFIG_MIPS32)
+ /* fixme */
+#define pte_to_pgoff(_pte) (((_pte).pte_high >> 6) + ((_pte).pte_high & 0x3f))
+#define pgoff_to_pte(off) \
+ ((pte_t){(((off) & 0x3f) + ((off) << 6) + _PAGE_FILE)})
+
+#else
#define pte_to_pgoff(_pte) \
((((_pte).pte >> 3) & 0x1f ) + (((_pte).pte >> 9) << 6 ))
#define pgoff_to_pte(off) \
((pte_t) { (((off) & 0x1f) << 3) + (((off) >> 6) << 9) + _PAGE_FILE })
+#endif#endif
Index: include/asm-mips/pgtable-bits.h =================================================================== RCS file: /home/cvs/linux/include/asm-mips/pgtable-bits.h,v retrieving revision 1.9 diff -u -r1.9 pgtable-bits.h --- include/asm-mips/pgtable-bits.h 24 Jun 2004 20:31:11 -0000 1.9 +++ include/asm-mips/pgtable-bits.h 19 Sep 2004 22:51:29 -0000 @@ -33,6 +33,31 @@ * unpredictable things. The code (when it is written) to deal with * this problem will be in the update_mmu_cache() code for the r4k. */ +#if defined(CONFIG_CPU_MIPS32) && defined(CONFIG_64BIT_PHYS_ADDR) + +#define _PAGE_PRESENT (1<<6) /* implemented in software */ +#define _PAGE_READ (1<<7) /* implemented in software */ +#define _PAGE_WRITE (1<<8) /* implemented in software */ +#define _PAGE_ACCESSED (1<<9) /* implemented in software */ +#define _PAGE_MODIFIED (1<<10) /* implemented in software */ +#define _PAGE_FILE (1<<10) /* set:pagecache unset:swap */ + +#define _PAGE_R4KBUG (1<<0) /* workaround for r4k bug */ +#define _PAGE_GLOBAL (1<<0) +#define _PAGE_VALID (1<<1) +#define _PAGE_SILENT_READ (1<<1) /* synonym */ +#define _PAGE_DIRTY (1<<2) /* The MIPS dirty bit */ +#define _PAGE_SILENT_WRITE (1<<2) +#define _CACHE_MASK (7<<3) + +/* MIPS32 defines only values 2 and 3. The rest are implementation + * dependent. + */ +#define _CACHE_UNCACHED (2<<3) +#define _CACHE_CACHABLE_NONCOHERENT (3<<3) + +#else + #define _PAGE_PRESENT (1<<0) /* implemented in software */ #define _PAGE_READ (1<<1) /* implemented in software */ #define _PAGE_WRITE (1<<2) /* implemented in software */ @@ -97,6 +122,7 @@
#endif #endif +#endif /* defined(CONFIG_CPU_MIPS32) && defined(CONFIG_64BIT_PHYS_ADDR) */
#define __READABLE (_PAGE_READ | _PAGE_SILENT_READ | _PAGE_ACCESSED) #define __WRITEABLE (_PAGE_WRITE | _PAGE_SILENT_WRITE | _PAGE_MODIFIED) @@ -113,6 +139,10 @@ #define PAGE_CACHABLE_DEFAULT _CACHE_CACHABLE_COW #endif
+#if defined(CONFIG_CPU_MIPS32) && defined(CONFIG_64BIT_PHYS_ADDR) +#define CONF_CM_DEFAULT (PAGE_CACHABLE_DEFAULT >> 3) +#else #define CONF_CM_DEFAULT (PAGE_CACHABLE_DEFAULT >> 9) +#endif
#endif /* _ASM_PGTABLE_BITS_H */ Index: include/asm-mips/pgtable.h =================================================================== RCS file: /home/cvs/linux/include/asm-mips/pgtable.h,v retrieving revision 1.97 diff -u -r1.97 pgtable.h --- include/asm-mips/pgtable.h 19 Jun 2004 01:39:24 -0000 1.97 +++ include/asm-mips/pgtable.h 19 Sep 2004 22:51:29 -0000 @@ -80,6 +80,34 @@ #define pte_none(pte) (!(pte_val(pte) & ~_PAGE_GLOBAL)) #define pte_present(pte) (pte_val(pte) & _PAGE_PRESENT)
+#if defined(CONFIG_64BIT_PHYS_ADDR) && defined(CONFIG_MIPS32)
+static inline void set_pte(pte_t *ptep, pte_t pte)
+{
+ ptep->pte_high = pte.pte_high;
+ smp_wmb();
+ ptep->pte_low = pte.pte_low;
+ //printk("pte_high %x pte_low %x\n", ptep->pte_high, ptep->pte_low);
+
+ if (pte_val(pte) & _PAGE_GLOBAL) {
+ pte_t *buddy = ptep_buddy(ptep);
+ /*
+ * Make sure the buddy is global too (if it's !none,
+ * it better already be global)
+ */
+ if (pte_none(*buddy))
+ buddy->pte_low |= _PAGE_GLOBAL;
+ }
+}
+
+static inline void pte_clear(pte_t *ptep)
+{
+ /* Preserve global status for the pair */
+ if (pte_val(*ptep_buddy(ptep)) & _PAGE_GLOBAL)
+ set_pte(ptep, __pte(_PAGE_GLOBAL));
+ else
+ set_pte(ptep, __pte(0));
+}
+#else
/*
* Certain architectures need to do special things when pte's
* within a page table are directly modified. Thus, the following
@@ -111,6 +139,7 @@
#endif
set_pte(ptep, __pte(0));
}
+#endif/*
* (pmds are folded into pgds so this doesn't get actually called,
@@ -130,6 +159,79 @@
* Undefined behaviour if not..
*/
static inline int pte_user(pte_t pte) { BUG(); return 0; }
+#if defined(CONFIG_64BIT_PHYS_ADDR) && defined(CONFIG_MIPS32)
+static inline int pte_read(pte_t pte) { return (pte).pte_low & _PAGE_READ; }
+static inline int pte_write(pte_t pte) { return (pte).pte_low & _PAGE_WRITE; }
+static inline int pte_dirty(pte_t pte) { return (pte).pte_low & _PAGE_MODIFIED; }
+static inline int pte_young(pte_t pte) { return (pte).pte_low & _PAGE_ACCESSED; }
+static inline int pte_file(pte_t pte) { return (pte).pte_low & _PAGE_FILE; }
+static inline pte_t pte_wrprotect(pte_t pte)
+{
+ (pte).pte_low &= ~(_PAGE_WRITE | _PAGE_SILENT_WRITE);
+ (pte).pte_high &= ~_PAGE_SILENT_WRITE;
+ return pte;
+}
+
+static inline pte_t pte_rdprotect(pte_t pte)
+{
+ (pte).pte_low &= ~(_PAGE_READ | _PAGE_SILENT_READ);
+ (pte).pte_high &= ~_PAGE_SILENT_READ;
+ return pte;
+}
+
+static inline pte_t pte_mkclean(pte_t pte)
+{
+ (pte).pte_low &= ~(_PAGE_MODIFIED|_PAGE_SILENT_WRITE);
+ (pte).pte_high &= ~_PAGE_SILENT_WRITE;
+ return pte;
+}
+
+static inline pte_t pte_mkold(pte_t pte)
+{
+ (pte).pte_low &= ~(_PAGE_ACCESSED|_PAGE_SILENT_READ);
+ (pte).pte_high &= ~_PAGE_SILENT_READ;
+ return pte;
+}
+
+static inline pte_t pte_mkwrite(pte_t pte)
+{
+ (pte).pte_low |= _PAGE_WRITE;
+ if ((pte).pte_low & _PAGE_MODIFIED) {
+ (pte).pte_low |= _PAGE_SILENT_WRITE;
+ (pte).pte_high |= _PAGE_SILENT_WRITE;
+ }
+ return pte;
+}
+
+static inline pte_t pte_mkread(pte_t pte)
+{
+ (pte).pte_low |= _PAGE_READ;
+ if ((pte).pte_low & _PAGE_ACCESSED) {
+ (pte).pte_low |= _PAGE_SILENT_READ;
+ (pte).pte_high |= _PAGE_SILENT_READ;
+ }
+ return pte;
+}
+
+static inline pte_t pte_mkdirty(pte_t pte)
+{
+ (pte).pte_low |= _PAGE_MODIFIED;
+ if ((pte).pte_low & _PAGE_WRITE) {
+ (pte).pte_low |= _PAGE_SILENT_WRITE;
+ (pte).pte_high |= _PAGE_SILENT_WRITE;
+ }
+ return pte;
+}
+
+static inline pte_t pte_mkyoung(pte_t pte)
+{
+ (pte).pte_low |= _PAGE_ACCESSED;
+ if ((pte).pte_low & _PAGE_READ)
+ (pte).pte_low |= _PAGE_SILENT_READ;
+ (pte).pte_high |= _PAGE_SILENT_READ;
+ return pte;
+}
+#else
static inline int pte_read(pte_t pte) { return pte_val(pte) & _PAGE_READ; }
static inline int pte_write(pte_t pte) { return pte_val(pte) & _PAGE_WRITE; }
static inline int pte_dirty(pte_t pte) { return pte_val(pte) & _PAGE_MODIFIED; }
@@ -191,6 +293,7 @@
pte_val(pte) |= _PAGE_SILENT_READ;
return pte;
}
+#endif
/* * Macro to make mark a page protection value as "uncacheable". Note @@ -215,10 +318,20 @@ */ #define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot))
+#if defined(CONFIG_64BIT_PHYS_ADDR) && defined(CONFIG_MIPS32)
+static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
+{
+ pte.pte_low &= _PAGE_CHG_MASK;
+ pte.pte_low |= pgprot_val(newprot);
+ pte.pte_high |= pgprot_val(newprot) & 0x3f;
+ return pte;
+}
+#else
static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
{
return __pte((pte_val(pte) & _PAGE_CHG_MASK) | pgprot_val(newprot));
}
+#endifextern void __update_tlb(struct vm_area_struct *vma, unsigned long address,
@@ -245,7 +358,27 @@
*/
#define HAVE_ARCH_UNMAPPED_AREA
+#ifdef CONFIG_64BIT_PHYS_ADDR
+extern phys_t fixup_bigphys_addr(phys_t phys_addr, phys_t size);
+
+extern int remap_page_range_high(struct vm_area_struct *vma,
+ unsigned long from,
+ phys_t phys_addr,
+ unsigned long size,
+ pgprot_t prot);
+
+static inline int io_remap_page_range(struct vm_area_struct *vma,
+ unsigned long from,
+ unsigned long phys_addr,
+ unsigned long size,
+ pgprot_t prot)
+{
+ phys_t phys_addr_high = fixup_bigphys_addr(phys_addr, size);
+ return remap_page_range_high(vma, from, phys_addr_high, size, prot);
+}
+#else
#define io_remap_page_range remap_page_range
+#endif/* * No page table caches to initialise
