161 lines
4.8 KiB
C
161 lines
4.8 KiB
C
|
/*
|
||
|
|
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
|
||
|
|
*
|
||
|
|
* 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.
|
||
|
|
*
|
||
|
|
* vineetg: March 2009
|
||
|
|
* -Implemented task_pt_regs( )
|
||
|
|
*
|
||
|
|
* Amit Bhor, Sameer Dhavale, Ashwin Chaugule: Codito Technologies 2004
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef __ASM_ARC_PROCESSOR_H
|
||
|
|
#define __ASM_ARC_PROCESSOR_H
|
||
|
|
|
||
|
|
#ifndef __ASSEMBLY__
|
||
|
|
|
||
|
|
#include <asm/ptrace.h>
|
||
|
|
|
||
|
|
#ifdef CONFIG_ARC_FPU_SAVE_RESTORE
|
||
|
|
/* These DPFP regs need to be saved/restored across ctx-sw */
|
||
|
|
struct arc_fpu {
|
||
|
|
struct {
|
||
|
|
unsigned int l, h;
|
||
|
|
} aux_dpfp[2];
|
||
|
|
};
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/* Arch specific stuff which needs to be saved per task.
|
||
|
|
* However these items are not so important so as to earn a place in
|
||
|
|
* struct thread_info
|
||
|
|
*/
|
||
|
|
struct thread_struct {
|
||
|
|
unsigned long ksp; /* kernel mode stack pointer */
|
||
|
|
unsigned long callee_reg; /* pointer to callee regs */
|
||
|
|
unsigned long fault_address; /* dbls as brkpt holder as well */
|
||
|
|
#ifdef CONFIG_ARC_FPU_SAVE_RESTORE
|
||
|
|
struct arc_fpu fpu;
|
||
|
|
#endif
|
||
|
|
};
|
||
|
|
|
||
|
|
#define INIT_THREAD { \
|
||
|
|
.ksp = sizeof(init_stack) + (unsigned long) init_stack, \
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Forward declaration, a strange C thing */
|
||
|
|
struct task_struct;
|
||
|
|
|
||
|
|
#define task_pt_regs(p) \
|
||
|
|
((struct pt_regs *)(THREAD_SIZE + (void *)task_stack_page(p)) - 1)
|
||
|
|
|
||
|
|
/* Free all resources held by a thread */
|
||
|
|
#define release_thread(thread) do { } while (0)
|
||
|
|
|
||
|
|
/*
|
||
|
|
* A lot of busy-wait loops in SMP are based off of non-volatile data otherwise
|
||
|
|
* get optimised away by gcc
|
||
|
|
*/
|
||
|
|
#ifndef CONFIG_EZNPS_MTM_EXT
|
||
|
|
|
||
|
|
#define cpu_relax() barrier()
|
||
|
|
#define cpu_relax_lowlatency() cpu_relax()
|
||
|
|
|
||
|
|
#else
|
||
|
|
|
||
|
|
#define cpu_relax() \
|
||
|
|
__asm__ __volatile__ (".word %0" : : "i"(CTOP_INST_SCHD_RW) : "memory")
|
||
|
|
|
||
|
|
#define cpu_relax_lowlatency() barrier()
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#define copy_segments(tsk, mm) do { } while (0)
|
||
|
|
#define release_segments(mm) do { } while (0)
|
||
|
|
|
||
|
|
#define KSTK_EIP(tsk) (task_pt_regs(tsk)->ret)
|
||
|
|
#define KSTK_ESP(tsk) (task_pt_regs(tsk)->sp)
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Where about of Task's sp, fp, blink when it was last seen in kernel mode.
|
||
|
|
* Look in process.c for details of kernel stack layout
|
||
|
|
*/
|
||
|
|
#define TSK_K_ESP(tsk) (tsk->thread.ksp)
|
||
|
|
|
||
|
|
#define TSK_K_REG(tsk, off) (*((unsigned long *)(TSK_K_ESP(tsk) + \
|
||
|
|
sizeof(struct callee_regs) + off)))
|
||
|
|
|
||
|
|
#define TSK_K_BLINK(tsk) TSK_K_REG(tsk, 4)
|
||
|
|
#define TSK_K_FP(tsk) TSK_K_REG(tsk, 0)
|
||
|
|
|
||
|
|
#define thread_saved_pc(tsk) TSK_K_BLINK(tsk)
|
||
|
|
|
||
|
|
extern void start_thread(struct pt_regs * regs, unsigned long pc,
|
||
|
|
unsigned long usp);
|
||
|
|
|
||
|
|
extern unsigned int get_wchan(struct task_struct *p);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Default implementation of macro that returns current
|
||
|
|
* instruction pointer ("program counter").
|
||
|
|
* Should the PC register be read instead ? This macro does not seem to
|
||
|
|
* be used in many places so this wont be all that bad.
|
||
|
|
*/
|
||
|
|
#define current_text_addr() ({ __label__ _l; _l: &&_l; })
|
||
|
|
|
||
|
|
#endif /* !__ASSEMBLY__ */
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Default System Memory Map on ARC
|
||
|
|
*
|
||
|
|
* ---------------------------- (lower 2G, Translated) -------------------------
|
||
|
|
* 0x0000_0000 0x5FFF_FFFF (user vaddr: TASK_SIZE)
|
||
|
|
* 0x6000_0000 0x6FFF_FFFF (reserved gutter between U/K)
|
||
|
|
* 0x7000_0000 0x7FFF_FFFF (kvaddr: vmalloc/modules/pkmap..)
|
||
|
|
*
|
||
|
|
* PAGE_OFFSET ---------------- (Upper 2G, Untranslated) -----------------------
|
||
|
|
* 0x8000_0000 0xBFFF_FFFF (kernel direct mapped)
|
||
|
|
* 0xC000_0000 0xFFFF_FFFF (peripheral uncached space)
|
||
|
|
* -----------------------------------------------------------------------------
|
||
|
|
*/
|
||
|
|
|
||
|
|
#define TASK_SIZE 0x60000000
|
||
|
|
|
||
|
|
#define VMALLOC_START (PAGE_OFFSET - (CONFIG_ARC_KVADDR_SIZE << 20))
|
||
|
|
|
||
|
|
/* 1 PGDIR_SIZE each for fixmap/pkmap, 2 PGDIR_SIZE gutter (see asm/highmem.h) */
|
||
|
|
#define VMALLOC_SIZE ((CONFIG_ARC_KVADDR_SIZE << 20) - PGDIR_SIZE * 4)
|
||
|
|
|
||
|
|
#define VMALLOC_END (VMALLOC_START + VMALLOC_SIZE)
|
||
|
|
|
||
|
|
#define USER_KERNEL_GUTTER (VMALLOC_START - TASK_SIZE)
|
||
|
|
|
||
|
|
#ifdef CONFIG_ARC_PLAT_EZNPS
|
||
|
|
/* NPS architecture defines special window of 129M in user address space for
|
||
|
|
* special memory areas, when accessing this window the MMU do not use TLB.
|
||
|
|
* Instead MMU direct the access to:
|
||
|
|
* 0x57f00000:0x57ffffff -- 1M of closely coupled memory (aka CMEM)
|
||
|
|
* 0x58000000:0x5fffffff -- 16 huge pages, 8M each, with fixed map (aka FMTs)
|
||
|
|
*
|
||
|
|
* CMEM - is the fastest memory we got and its size is 16K.
|
||
|
|
* FMT - is used to map either to internal/external memory.
|
||
|
|
* Internal memory is the second fast memory and its size is 16M
|
||
|
|
* External memory is the biggest memory (16G) and also the slowest.
|
||
|
|
*
|
||
|
|
* STACK_TOP need to be PMD align (21bit) that is why we supply 0x57e00000.
|
||
|
|
*/
|
||
|
|
#define STACK_TOP 0x57e00000
|
||
|
|
#else
|
||
|
|
#define STACK_TOP TASK_SIZE
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#define STACK_TOP_MAX STACK_TOP
|
||
|
|
|
||
|
|
/* This decides where the kernel will search for a free chunk of vm
|
||
|
|
* space during mmap's.
|
||
|
|
*/
|
||
|
|
#define TASK_UNMAPPED_BASE (TASK_SIZE / 3)
|
||
|
|
|
||
|
|
#endif /* __ASM_ARC_PROCESSOR_H */
|