/* * 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 #ifdef CONFIG_ARC_PLAT_EZNPS struct eznps_dp { unsigned int eflags; unsigned int gpa1; }; #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 #ifdef CONFIG_ARC_PLAT_EZNPS struct eznps_dp dp; #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() #else #define cpu_relax() \ __asm__ __volatile__ (".word %0" : : "i"(CTOP_INST_SCHD_RW) : "memory") #endif #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) 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 */
Name | Type | Size | Permission | Actions |
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Kbuild | File | 681 B | 0644 |
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arcregs.h | File | 8.59 KB | 0644 |
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asm-offsets.h | File | 311 B | 0644 |
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atomic.h | File | 15.14 KB | 0644 |
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barrier.h | File | 1.75 KB | 0644 |
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bitops.h | File | 9.81 KB | 0644 |
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bug.h | File | 938 B | 0644 |
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cache.h | File | 3.77 KB | 0644 |
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cacheflush.h | File | 3.88 KB | 0644 |
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checksum.h | File | 2.45 KB | 0644 |
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cmpxchg.h | File | 5.4 KB | 0644 |
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current.h | File | 695 B | 0644 |
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delay.h | File | 1.99 KB | 0644 |
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disasm.h | File | 3.87 KB | 0644 |
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dma-mapping.h | File | 734 B | 0644 |
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dma.h | File | 459 B | 0644 |
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dwarf.h | File | 892 B | 0644 |
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elf.h | File | 2.15 KB | 0644 |
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entry-arcv2.h | File | 4.85 KB | 0644 |
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entry-compact.h | File | 9.29 KB | 0644 |
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entry.h | File | 6.73 KB | 0644 |
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exec.h | File | 410 B | 0644 |
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fb.h | File | 411 B | 0644 |
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futex.h | File | 3.67 KB | 0644 |
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highmem.h | File | 1.46 KB | 0644 |
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hugepage.h | File | 2.41 KB | 0644 |
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io.h | File | 6.42 KB | 0644 |
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irq.h | File | 825 B | 0644 |
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irqflags-arcv2.h | File | 3.45 KB | 0644 |
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irqflags-compact.h | File | 4.25 KB | 0644 |
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irqflags.h | File | 509 B | 0644 |
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kdebug.h | File | 400 B | 0644 |
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kgdb.h | File | 1.35 KB | 0644 |
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kmap_types.h | File | 489 B | 0644 |
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kprobes.h | File | 1.37 KB | 0644 |
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linkage.h | File | 1.42 KB | 0644 |
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mach_desc.h | File | 2.06 KB | 0644 |
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mmu.h | File | 2.44 KB | 0644 |
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mmu_context.h | File | 5.67 KB | 0644 |
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mmzone.h | File | 989 B | 0644 |
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module.h | File | 661 B | 0644 |
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page.h | File | 2.99 KB | 0644 |
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pci.h | File | 705 B | 0644 |
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perf_event.h | File | 6.86 KB | 0644 |
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pgalloc.h | File | 3.79 KB | 0644 |
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pgtable.h | File | 14.2 KB | 0644 |
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processor.h | File | 4.69 KB | 0644 |
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ptrace.h | File | 3.87 KB | 0644 |
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sections.h | File | 407 B | 0644 |
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segment.h | File | 612 B | 0644 |
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serial.h | File | 644 B | 0644 |
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setup.h | File | 1.18 KB | 0644 |
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shmparam.h | File | 442 B | 0644 |
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smp.h | File | 4.25 KB | 0644 |
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spinlock.h | File | 8.79 KB | 0644 |
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spinlock_types.h | File | 1.03 KB | 0644 |
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stacktrace.h | File | 1.29 KB | 0644 |
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string.h | File | 1.15 KB | 0644 |
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switch_to.h | File | 1.17 KB | 0644 |
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syscall.h | File | 1.57 KB | 0644 |
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syscalls.h | File | 653 B | 0644 |
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thread_info.h | File | 3.39 KB | 0644 |
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timex.h | File | 508 B | 0644 |
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tlb-mmu1.h | File | 3.48 KB | 0644 |
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tlb.h | File | 1.23 KB | 0644 |
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tlbflush.h | File | 1.76 KB | 0644 |
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uaccess.h | File | 18.45 KB | 0644 |
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unaligned.h | File | 771 B | 0644 |
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unwind.h | File | 3.51 KB | 0644 |
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