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/*
 *  arch/arm/include/asm/memory.h
 *
 *  Copyright (C) 2000-2002 Russell King
 *  modification for nommu, Hyok S. Choi, 2004
 *
 * 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.
 *
 *  Note: this file should not be included by non-asm/.h files
 */
#ifndef __ASM_ARM_MEMORY_H
#define __ASM_ARM_MEMORY_H

#include <linux/compiler.h>
#include <linux/const.h>
#include <linux/types.h>
#include <linux/sizes.h>

#ifdef CONFIG_NEED_MACH_MEMORY_H
#include <mach/memory.h>
#endif

/*
 * Allow for constants defined here to be used from assembly code
 * by prepending the UL suffix only with actual C code compilation.
 */
#define UL(x) _AC(x, UL)

/* PAGE_OFFSET - the virtual address of the start of the kernel image */
#define PAGE_OFFSET		UL(CONFIG_PAGE_OFFSET)

#ifdef CONFIG_MMU

/*
 * TASK_SIZE - the maximum size of a user space task.
 * TASK_UNMAPPED_BASE - the lower boundary of the mmap VM area
 */
#define TASK_SIZE		(UL(CONFIG_PAGE_OFFSET) - UL(SZ_16M))
#define TASK_UNMAPPED_BASE	ALIGN(TASK_SIZE / 3, SZ_16M)

/*
 * The maximum size of a 26-bit user space task.
 */
#define TASK_SIZE_26		(UL(1) << 26)

/*
 * The module space lives between the addresses given by TASK_SIZE
 * and PAGE_OFFSET - it must be within 32MB of the kernel text.
 */
#ifndef CONFIG_THUMB2_KERNEL
#define MODULES_VADDR		(PAGE_OFFSET - SZ_16M)
#else
/* smaller range for Thumb-2 symbols relocation (2^24)*/
#define MODULES_VADDR		(PAGE_OFFSET - SZ_8M)
#endif

#if TASK_SIZE > MODULES_VADDR
#error Top of user space clashes with start of module space
#endif

/*
 * The highmem pkmap virtual space shares the end of the module area.
 */
#ifdef CONFIG_HIGHMEM
#define MODULES_END		(PAGE_OFFSET - PMD_SIZE)
#else
#define MODULES_END		(PAGE_OFFSET)
#endif

/*
 * The XIP kernel gets mapped at the bottom of the module vm area.
 * Since we use sections to map it, this macro replaces the physical address
 * with its virtual address while keeping offset from the base section.
 */
#define XIP_VIRT_ADDR(physaddr)  (MODULES_VADDR + ((physaddr) & 0x000fffff))

#if !defined(CONFIG_SMP) && !defined(CONFIG_ARM_LPAE)
/*
 * Allow 16MB-aligned ioremap pages
 */
#define IOREMAP_MAX_ORDER	24
#endif

#define VECTORS_BASE		UL(0xffff0000)

#else /* CONFIG_MMU */

#ifndef __ASSEMBLY__
extern unsigned long vectors_base;
#define VECTORS_BASE		vectors_base
#endif

/*
 * The limitation of user task size can grow up to the end of free ram region.
 * It is difficult to define and perhaps will never meet the original meaning
 * of this define that was meant to.
 * Fortunately, there is no reference for this in noMMU mode, for now.
 */
#define TASK_SIZE		UL(0xffffffff)

#ifndef TASK_UNMAPPED_BASE
#define TASK_UNMAPPED_BASE	UL(0x00000000)
#endif

#ifndef END_MEM
#define END_MEM     		(UL(CONFIG_DRAM_BASE) + CONFIG_DRAM_SIZE)
#endif

/*
 * The module can be at any place in ram in nommu mode.
 */
#define MODULES_END		(END_MEM)
#define MODULES_VADDR		PAGE_OFFSET

#define XIP_VIRT_ADDR(physaddr)  (physaddr)

#endif /* !CONFIG_MMU */

#ifdef CONFIG_XIP_KERNEL
#define KERNEL_START		_sdata
#else
#define KERNEL_START		_stext
#endif
#define KERNEL_END		_end

/*
 * We fix the TCM memories max 32 KiB ITCM resp DTCM at these
 * locations
 */
#ifdef CONFIG_HAVE_TCM
#define ITCM_OFFSET	UL(0xfffe0000)
#define DTCM_OFFSET	UL(0xfffe8000)
#endif

/*
 * Convert a page to/from a physical address
 */
#define page_to_phys(page)	(__pfn_to_phys(page_to_pfn(page)))
#define phys_to_page(phys)	(pfn_to_page(__phys_to_pfn(phys)))

/*
 * PLAT_PHYS_OFFSET is the offset (from zero) of the start of physical
 * memory.  This is used for XIP and NoMMU kernels, and on platforms that don't
 * have CONFIG_ARM_PATCH_PHYS_VIRT. Assembly code must always use
 * PLAT_PHYS_OFFSET and not PHYS_OFFSET.
 */
#define PLAT_PHYS_OFFSET	UL(CONFIG_PHYS_OFFSET)

#ifdef CONFIG_XIP_KERNEL
/*
 * When referencing data in RAM from the XIP region in a relative manner
 * with the MMU off, we need the relative offset between the two physical
 * addresses.  The macro below achieves this, which is:
 *    __pa(v_data) - __xip_pa(v_text)
 */
#define PHYS_RELATIVE(v_data, v_text) \
	(((v_data) - PAGE_OFFSET + PLAT_PHYS_OFFSET) - \
	 ((v_text) - XIP_VIRT_ADDR(CONFIG_XIP_PHYS_ADDR) + \
          CONFIG_XIP_PHYS_ADDR))
#else
#define PHYS_RELATIVE(v_data, v_text) ((v_data) - (v_text))
#endif

#ifndef __ASSEMBLY__

/*
 * Physical vs virtual RAM address space conversion.  These are
 * private definitions which should NOT be used outside memory.h
 * files.  Use virt_to_phys/phys_to_virt/__pa/__va instead.
 *
 * PFNs are used to describe any physical page; this means
 * PFN 0 == physical address 0.
 */

#if defined(CONFIG_ARM_PATCH_PHYS_VIRT)

/*
 * Constants used to force the right instruction encodings and shifts
 * so that all we need to do is modify the 8-bit constant field.
 */
#define __PV_BITS_31_24	0x81000000
#define __PV_BITS_7_0	0x81

extern unsigned long __pv_phys_pfn_offset;
extern u64 __pv_offset;
extern void fixup_pv_table(const void *, unsigned long);
extern const void *__pv_table_begin, *__pv_table_end;

#define PHYS_OFFSET	((phys_addr_t)__pv_phys_pfn_offset << PAGE_SHIFT)
#define PHYS_PFN_OFFSET	(__pv_phys_pfn_offset)

#define __pv_stub(from,to,instr,type)			\
	__asm__("@ __pv_stub\n"				\
	"1:	" instr "	%0, %1, %2\n"		\
	"	.pushsection .pv_table,\"a\"\n"		\
	"	.long	1b\n"				\
	"	.popsection\n"				\
	: "=r" (to)					\
	: "r" (from), "I" (type))

#define __pv_stub_mov_hi(t)				\
	__asm__ volatile("@ __pv_stub_mov\n"		\
	"1:	mov	%R0, %1\n"			\
	"	.pushsection .pv_table,\"a\"\n"		\
	"	.long	1b\n"				\
	"	.popsection\n"				\
	: "=r" (t)					\
	: "I" (__PV_BITS_7_0))

#define __pv_add_carry_stub(x, y)			\
	__asm__ volatile("@ __pv_add_carry_stub\n"	\
	"1:	adds	%Q0, %1, %2\n"			\
	"	adc	%R0, %R0, #0\n"			\
	"	.pushsection .pv_table,\"a\"\n"		\
	"	.long	1b\n"				\
	"	.popsection\n"				\
	: "+r" (y)					\
	: "r" (x), "I" (__PV_BITS_31_24)		\
	: "cc")

static inline phys_addr_t __virt_to_phys_nodebug(unsigned long x)
{
	phys_addr_t t;

	if (sizeof(phys_addr_t) == 4) {
		__pv_stub(x, t, "add", __PV_BITS_31_24);
	} else {
		__pv_stub_mov_hi(t);
		__pv_add_carry_stub(x, t);
	}
	return t;
}

static inline unsigned long __phys_to_virt(phys_addr_t x)
{
	unsigned long t;

	/*
	 * 'unsigned long' cast discard upper word when
	 * phys_addr_t is 64 bit, and makes sure that inline
	 * assembler expression receives 32 bit argument
	 * in place where 'r' 32 bit operand is expected.
	 */
	__pv_stub((unsigned long) x, t, "sub", __PV_BITS_31_24);
	return t;
}

#else

#define PHYS_OFFSET	PLAT_PHYS_OFFSET
#define PHYS_PFN_OFFSET	((unsigned long)(PHYS_OFFSET >> PAGE_SHIFT))

static inline phys_addr_t __virt_to_phys_nodebug(unsigned long x)
{
	return (phys_addr_t)x - PAGE_OFFSET + PHYS_OFFSET;
}

static inline unsigned long __phys_to_virt(phys_addr_t x)
{
	return x - PHYS_OFFSET + PAGE_OFFSET;
}

#endif

#define virt_to_pfn(kaddr) \
	((((unsigned long)(kaddr) - PAGE_OFFSET) >> PAGE_SHIFT) + \
	 PHYS_PFN_OFFSET)

#define __pa_symbol_nodebug(x)	__virt_to_phys_nodebug((x))

#ifdef CONFIG_DEBUG_VIRTUAL
extern phys_addr_t __virt_to_phys(unsigned long x);
extern phys_addr_t __phys_addr_symbol(unsigned long x);
#else
#define __virt_to_phys(x)	__virt_to_phys_nodebug(x)
#define __phys_addr_symbol(x)	__pa_symbol_nodebug(x)
#endif

/*
 * These are *only* valid on the kernel direct mapped RAM memory.
 * Note: Drivers should NOT use these.  They are the wrong
 * translation for translating DMA addresses.  Use the driver
 * DMA support - see dma-mapping.h.
 */
#define virt_to_phys virt_to_phys
static inline phys_addr_t virt_to_phys(const volatile void *x)
{
	return __virt_to_phys((unsigned long)(x));
}

#define phys_to_virt phys_to_virt
static inline void *phys_to_virt(phys_addr_t x)
{
	return (void *)__phys_to_virt(x);
}

/*
 * Drivers should NOT use these either.
 */
#define __pa(x)			__virt_to_phys((unsigned long)(x))
#define __pa_symbol(x)		__phys_addr_symbol(RELOC_HIDE((unsigned long)(x), 0))
#define __va(x)			((void *)__phys_to_virt((phys_addr_t)(x)))
#define pfn_to_kaddr(pfn)	__va((phys_addr_t)(pfn) << PAGE_SHIFT)

extern long long arch_phys_to_idmap_offset;

/*
 * These are for systems that have a hardware interconnect supported alias
 * of physical memory for idmap purposes.  Most cases should leave these
 * untouched.  Note: this can only return addresses less than 4GiB.
 */
static inline bool arm_has_idmap_alias(void)
{
	return IS_ENABLED(CONFIG_MMU) && arch_phys_to_idmap_offset != 0;
}

#define IDMAP_INVALID_ADDR ((u32)~0)

static inline unsigned long phys_to_idmap(phys_addr_t addr)
{
	if (IS_ENABLED(CONFIG_MMU) && arch_phys_to_idmap_offset) {
		addr += arch_phys_to_idmap_offset;
		if (addr > (u32)~0)
			addr = IDMAP_INVALID_ADDR;
	}
	return addr;
}

static inline phys_addr_t idmap_to_phys(unsigned long idmap)
{
	phys_addr_t addr = idmap;

	if (IS_ENABLED(CONFIG_MMU) && arch_phys_to_idmap_offset)
		addr -= arch_phys_to_idmap_offset;

	return addr;
}

static inline unsigned long __virt_to_idmap(unsigned long x)
{
	return phys_to_idmap(__virt_to_phys(x));
}

#define virt_to_idmap(x)	__virt_to_idmap((unsigned long)(x))

/*
 * Virtual <-> DMA view memory address translations
 * Again, these are *only* valid on the kernel direct mapped RAM
 * memory.  Use of these is *deprecated* (and that doesn't mean
 * use the __ prefixed forms instead.)  See dma-mapping.h.
 */
#ifndef __virt_to_bus
#define __virt_to_bus	__virt_to_phys
#define __bus_to_virt	__phys_to_virt
#define __pfn_to_bus(x)	__pfn_to_phys(x)
#define __bus_to_pfn(x)	__phys_to_pfn(x)
#endif

/*
 * Conversion between a struct page and a physical address.
 *
 *  page_to_pfn(page)	convert a struct page * to a PFN number
 *  pfn_to_page(pfn)	convert a _valid_ PFN number to struct page *
 *
 *  virt_to_page(k)	convert a _valid_ virtual address to struct page *
 *  virt_addr_valid(k)	indicates whether a virtual address is valid
 */
#define ARCH_PFN_OFFSET		PHYS_PFN_OFFSET

#define virt_to_page(kaddr)	pfn_to_page(virt_to_pfn(kaddr))
#define virt_addr_valid(kaddr)	(((unsigned long)(kaddr) >= PAGE_OFFSET && (unsigned long)(kaddr) < (unsigned long)high_memory) \
					&& pfn_valid(virt_to_pfn(kaddr)))

#endif

#include <asm-generic/memory_model.h>

#endif

Filemanager

Name Type Size Permission Actions
hardware Folder 0755
mach Folder 0755
xen Folder 0755
Kbuild File 568 B 0644
arch_gicv3.h File 9.05 KB 0644
arch_timer.h File 2.48 KB 0644
arm-cci.h File 1.05 KB 0644
asm-offsets.h File 35 B 0644
assembler.h File 10.46 KB 0644
atomic.h File 13.22 KB 0644
auxvec.h File 29 B 0644
bL_switcher.h File 2.28 KB 0644
barrier.h File 2.84 KB 0644
bitops.h File 8.62 KB 0644
bitrev.h File 451 B 0644
bug.h File 2.46 KB 0644
bugs.h File 546 B 0644
cache.h File 813 B 0644
cacheflush.h File 15.54 KB 0644
cachetype.h File 2.71 KB 0644
checksum.h File 3.71 KB 0644
clocksource.h File 153 B 0644
cmpxchg.h File 6.14 KB 0644
compiler.h File 978 B 0644
cp15.h File 3.84 KB 0644
cpu.h File 533 B 0644
cpufeature.h File 1.4 KB 0644
cpuidle.h File 1.33 KB 0644
cputype.h File 8.42 KB 0644
cti.h File 3.62 KB 0644
dcc.h File 1.01 KB 0644
delay.h File 2.83 KB 0644
device.h File 771 B 0644
div64.h File 3.17 KB 0644
dma-contiguous.h File 265 B 0644
dma-iommu.h File 1.01 KB 0644
dma-mapping.h File 7.44 KB 0644
dma.h File 4.18 KB 0644
dmi.h File 528 B 0644
domain.h File 3.65 KB 0644
ecard.h File 5.98 KB 0644
edac.h File 1.51 KB 0644
efi.h File 3.04 KB 0644
elf.h File 4.52 KB 0644
entry-macro-multi.S File 726 B 0644
exception.h File 571 B 0644
fb.h File 375 B 0644
fiq.h File 1.36 KB 0644
firmware.h File 1.82 KB 0644
fixmap.h File 1.84 KB 0644
flat.h File 915 B 0644
floppy.h File 3.61 KB 0644
fncpy.h File 3.08 KB 0644
fpstate.h File 1.73 KB 0644
ftrace.h File 1.92 KB 0644
futex.h File 4.24 KB 0644
glue-cache.h File 3.51 KB 0644
glue-df.h File 2.2 KB 0644
glue-pf.h File 1.12 KB 0644
glue-proc.h File 4.46 KB 0644
glue.h File 759 B 0644
gpio.h File 693 B 0644
hardirq.h File 803 B 0644
highmem.h File 2.15 KB 0644
hugetlb-3level.h File 2.03 KB 0644
hugetlb.h File 1.78 KB 0644
hw_breakpoint.h File 3.53 KB 0644
hw_irq.h File 349 B 0644
hwcap.h File 378 B 0644
hypervisor.h File 140 B 0644
ide.h File 566 B 0644
idmap.h File 355 B 0644
insn.h File 636 B 0644
io.h File 15.96 KB 0644
irq.h File 1015 B 0644
irq_work.h File 234 B 0644
irqflags.h File 3.88 KB 0644
jump_label.h File 1009 B 0644
kexec-internal.h File 272 B 0644
kexec.h File 2.3 KB 0644
kgdb.h File 2.72 KB 0644
kmap_types.h File 190 B 0644
kprobes.h File 2.65 KB 0644
kvm_arm.h File 7.6 KB 0644
kvm_asm.h File 2.84 KB 0644
kvm_coproc.h File 1.99 KB 0644
kvm_emulate.h File 7.84 KB 0644
kvm_host.h File 10.31 KB 0644
kvm_hyp.h File 4.49 KB 0644
kvm_mmio.h File 1.34 KB 0644
kvm_mmu.h File 7.27 KB 0644
limits.h File 166 B 0644
linkage.h File 216 B 0644
mc146818rtc.h File 720 B 0644
mcpm.h File 11.92 KB 0644
mcs_spinlock.h File 570 B 0644
memblock.h File 248 B 0644
memory.h File 10.12 KB 0644
mmu.h File 953 B 0644
mmu_context.h File 3.94 KB 0644
module.h File 1.57 KB 0644
mpu.h File 2.15 KB 0644
mtd-xip.h File 666 B 0644
neon.h File 1.16 KB 0644
nwflash.h File 252 B 0644
opcodes-sec.h File 742 B 0644
opcodes-virt.h File 1.32 KB 0644
opcodes.h File 8.07 KB 0644
outercache.h File 3.78 KB 0644
page-nommu.h File 957 B 0644
page.h File 3.61 KB 0644
paravirt.h File 454 B 0644
patch.h File 438 B 0644
pci.h File 956 B 0644
percpu.h File 1.56 KB 0644
perf_event.h File 850 B 0644
pgalloc.h File 3.79 KB 0644
pgtable-2level-hwdef.h File 3.45 KB 0644
pgtable-2level-types.h File 1.84 KB 0644
pgtable-2level.h File 8.51 KB 0644
pgtable-3level-hwdef.h File 3.95 KB 0644
pgtable-3level-types.h File 1.89 KB 0644
pgtable-3level.h File 9.54 KB 0644
pgtable-hwdef.h File 467 B 0644
pgtable-nommu.h File 2.66 KB 0644
pgtable.h File 11.68 KB 0644
probes.h File 1.73 KB 0644
proc-fns.h File 4.79 KB 0644
processor.h File 3.4 KB 0644
procinfo.h File 1.27 KB 0644
prom.h File 715 B 0644
psci.h File 771 B 0644
ptrace.h File 4.89 KB 0644
sections.h File 189 B 0644
set_memory.h File 1.04 KB 0644
setup.h File 934 B 0644
shmparam.h File 419 B 0644
signal.h File 500 B 0644
smp.h File 3.1 KB 0644
smp_plat.h File 2.48 KB 0644
smp_scu.h File 1.32 KB 0644
smp_twd.h File 908 B 0644
sparsemem.h File 716 B 0644
spectre.h File 906 B 0644
spinlock.h File 5.49 KB 0644
spinlock_types.h File 541 B 0644
stackprotector.h File 1.09 KB 0644
stacktrace.h File 742 B 0644
stage2_pgtable.h File 2.12 KB 0644
string.h File 1.43 KB 0644
suspend.h File 369 B 0644
swab.h File 1005 B 0644
switch_to.h File 1.03 KB 0644
sync_bitops.h File 1.03 KB 0644
syscall.h File 2.48 KB 0644
system_info.h File 763 B 0644
system_misc.h File 1.14 KB 0644
tcm.h File 937 B 0644
therm.h File 655 B 0644
thread_info.h File 5.2 KB 0644
thread_notify.h File 1.2 KB 0644
timex.h File 577 B 0644
tlb.h File 7.37 KB 0644
tlbflush.h File 17.88 KB 0644
tls.h File 3.09 KB 0644
topology.h File 1.18 KB 0644
traps.h File 1.17 KB 0644
trusted_foundations.h File 2.29 KB 0644
uaccess-asm.h File 2.83 KB 0644
uaccess.h File 16.22 KB 0644
ucontext.h File 2.98 KB 0644
unaligned.h File 846 B 0644
unified.h File 1.61 KB 0644
unistd.h File 1.68 KB 0644
unwind.h File 1.71 KB 0644
uprobes.h File 1.07 KB 0644
user.h File 4.2 KB 0644
v7m.h File 2.93 KB 0644
vdso.h File 507 B 0644
vdso_datapage.h File 1.69 KB 0644
vfp.h File 2.86 KB 0644
vfpmacros.h File 2.1 KB 0644
vga.h File 305 B 0644
virt.h File 2.9 KB 0644
word-at-a-time.h File 2.08 KB 0644
xor.h File 5.22 KB 0644