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/*
 * Memory layout definitions for the Hexagon architecture
 *
 * Copyright (c) 2010-2013, The Linux Foundation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 and
 * only version 2 as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA.
 */

#ifndef _ASM_HEXAGON_MEM_LAYOUT_H
#define _ASM_HEXAGON_MEM_LAYOUT_H

#include <linux/const.h>

/*
 * Have to do this for ginormous numbers, else they get printed as
 * negative numbers, which the linker no likey when you try to
 * assign it to the location counter.
 */

#define PAGE_OFFSET			_AC(0xc0000000, UL)

/*
 * Compiling for a platform that needs a crazy physical offset
 * (like if the memory starts at 1GB and up) means we need
 * an actual PHYS_OFFSET.  Should be set up in head.S.
 */

#ifdef CONFIG_HEXAGON_PHYS_OFFSET
#ifndef __ASSEMBLY__
extern unsigned long	__phys_offset;
#endif
#define PHYS_OFFSET	__phys_offset
#endif

#ifndef PHYS_OFFSET
#define PHYS_OFFSET	0
#endif

#define PHYS_PFN_OFFSET	(PHYS_OFFSET >> PAGE_SHIFT)
#define ARCH_PFN_OFFSET	PHYS_PFN_OFFSET

#define TASK_SIZE			(PAGE_OFFSET)

/*  not sure how these are used yet  */
#define STACK_TOP			TASK_SIZE
#define STACK_TOP_MAX			TASK_SIZE

#ifndef __ASSEMBLY__
enum fixed_addresses {
	FIX_KMAP_BEGIN,
	FIX_KMAP_END,  /*  check for per-cpuism  */
	__end_of_fixed_addresses
};

#define MIN_KERNEL_SEG (PAGE_OFFSET >> PGDIR_SHIFT)   /* L1 shift is 22 bits */
extern int max_kernel_seg;

/*
 * Start of vmalloc virtual address space for kernel;
 * supposed to be based on the amount of physical memory available
 */

#define VMALLOC_START ((unsigned long) __va(high_memory + VMALLOC_OFFSET))

/* Gap between physical ram and vmalloc space for guard purposes. */
#define VMALLOC_OFFSET PAGE_SIZE

/*
 * Create the space between VMALLOC_START and FIXADDR_TOP backwards
 * from the ... "top".
 *
 * Permanent IO mappings will live at 0xfexx_xxxx
 * Hypervisor occupies the last 16MB page at 0xffxxxxxx
 */

#define FIXADDR_TOP     0xfe000000
#define FIXADDR_SIZE    (__end_of_fixed_addresses << PAGE_SHIFT)
#define FIXADDR_START   (FIXADDR_TOP - FIXADDR_SIZE)

/*
 * "permanent kernel mappings", defined as long-lasting mappings of
 * high-memory page frames into the kernel address space.
 */

#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))

/*
 * To the "left" of the fixed map space is the kmap space
 *
 * "Permanent Kernel Mappings"; fancy (or less fancy) PTE table
 * that looks like it's actually walked.
 * Need to check the alignment/shift usage; some archs use
 * PMD_MASK on this value
 */
#define PKMAP_BASE (FIXADDR_START-PAGE_SIZE*LAST_PKMAP)

/*
 * 2 pages of guard gap between where vmalloc area ends
 * and pkmap_base begins.
 */
#define VMALLOC_END (PKMAP_BASE-PAGE_SIZE*2)
#endif /*  !__ASSEMBLY__  */


#endif /* _ASM_HEXAGON_MEM_LAYOUT_H */

Filemanager

Name Type Size Permission Actions
Kbuild File 886 B 0644
asm-offsets.h File 35 B 0644
atomic.h File 5.27 KB 0644
bitops.h File 6.62 KB 0644
cache.h File 1.16 KB 0644
cacheflush.h File 3.8 KB 0644
checksum.h File 1.61 KB 0644
cmpxchg.h File 2.55 KB 0644
delay.h File 978 B 0644
dma-mapping.h File 1.31 KB 0644
dma.h File 934 B 0644
elf.h File 6.34 KB 0644
exec.h File 1.01 KB 0644
fixmap.h File 1.11 KB 0644
fpu.h File 90 B 0644
futex.h File 2.25 KB 0644
hexagon_vm.h File 6.39 KB 0644
intrinsics.h File 1003 B 0644
io.h File 6.95 KB 0644
irq.h File 1.13 KB 0644
irqflags.h File 1.46 KB 0644
kgdb.h File 1.36 KB 0644
linkage.h File 871 B 0644
mem-layout.h File 3.42 KB 0644
mmu.h File 1.1 KB 0644
mmu_context.h File 2.59 KB 0644
module.h File 910 B 0644
page.h File 4.74 KB 0644
perf_event.h File 841 B 0644
pgalloc.h File 4.08 KB 0644
pgtable.h File 14.15 KB 0644
processor.h File 3.8 KB 0644
smp.h File 1.31 KB 0644
spinlock.h File 3.84 KB 0644
spinlock_types.h File 1.15 KB 0644
string.h File 1.08 KB 0644
suspend.h File 872 B 0644
switch_to.h File 1.09 KB 0644
syscall.h File 1.38 KB 0644
thread_info.h File 4.05 KB 0644
time.h File 980 B 0644
timer-regs.h File 1.23 KB 0644
timex.h File 1.13 KB 0644
tlb.h File 1.21 KB 0644
tlbflush.h File 2.08 KB 0644
traps.h File 1.02 KB 0644
uaccess.h File 3.67 KB 0644
vdso.h File 941 B 0644
vm_fault.h File 993 B 0644
vm_mmu.h File 3.37 KB 0644