diff options
author | Richard Kuo <rkuo@codeaurora.org> | 2011-10-31 18:54:08 -0500 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-11-01 07:34:20 -0700 |
commit | 499236d9db5a349eeab2e9f2791e2d69c2e4ed53 (patch) | |
tree | 54520c8e5aa0558a78554127fe5dd4096e5b3558 /arch/hexagon/include | |
parent | a7e79840991eac8da36f437c653ee4b8cfbdafdc (diff) | |
download | linux-499236d9db5a349eeab2e9f2791e2d69c2e4ed53.tar.bz2 |
Hexagon: Add page-fault support.
Signed-off-by: Richard Kuo <rkuo@codeaurora.org>
Signed-off-by: Linas Vepstas <linas@codeaurora.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/hexagon/include')
-rw-r--r-- | arch/hexagon/include/asm/mem-layout.h | 112 | ||||
-rw-r--r-- | arch/hexagon/include/asm/vm_fault.h | 26 |
2 files changed, 138 insertions, 0 deletions
diff --git a/arch/hexagon/include/asm/mem-layout.h b/arch/hexagon/include/asm/mem-layout.h new file mode 100644 index 000000000000..72e5dcda79f5 --- /dev/null +++ b/arch/hexagon/include/asm/mem-layout.h @@ -0,0 +1,112 @@ +/* + * Memory layout definitions for the Hexagon architecture + * + * Copyright (c) 2010-2011, Code Aurora Forum. 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) + +/* + * LOAD_ADDRESS is the physical/linear address of where in memory + * the kernel gets loaded. The 12 least significant bits must be zero (0) + * due to limitations on setting the EVB + * + */ + +#ifndef LOAD_ADDRESS +#define LOAD_ADDRESS 0x00000000 +#endif + +#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 0x300 /* From 0xc0000000 */ +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 (PAGE_OFFSET + VMALLOC_OFFSET + \ + (unsigned long)high_memory) + +/* 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 */ diff --git a/arch/hexagon/include/asm/vm_fault.h b/arch/hexagon/include/asm/vm_fault.h new file mode 100644 index 000000000000..cacda36ef5d5 --- /dev/null +++ b/arch/hexagon/include/asm/vm_fault.h @@ -0,0 +1,26 @@ +/* + * Copyright (c) 2010-2011, Code Aurora Forum. 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_VM_FAULT_H +#define _ASM_HEXAGON_VM_FAULT_H + +extern void execute_protection_fault(struct pt_regs *); +extern void write_protection_fault(struct pt_regs *); +extern void read_protection_fault(struct pt_regs *); + +#endif |