/* * Process/processor support for the Hexagon architecture * * Copyright (c) 2010-2012, 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_PROCESSOR_H #define _ASM_PROCESSOR_H #ifndef __ASSEMBLY__ #include <asm/mem-layout.h> #include <asm/registers.h> #include <asm/hexagon_vm.h> /* must be a macro */ #define current_text_addr() ({ __label__ _l; _l: &&_l; }) /* task_struct, defined elsewhere, is the "process descriptor" */ struct task_struct; extern void start_thread(struct pt_regs *, unsigned long, unsigned long); /* * thread_struct is supposed to be for context switch data. * Specifically, to hold the state necessary to perform switch_to... */ struct thread_struct { void *switch_sp; }; /* * initializes thread_struct * The only thing we have in there is switch_sp * which doesn't really need to be initialized. */ #define INIT_THREAD { \ } #define cpu_relax() __vmyield() /* * Decides where the kernel will search for a free chunk of vm space during * mmaps. * See also arch_get_unmapped_area. * Doesn't affect if you have MAX_FIXED in the page flags set though... * * Apparently the convention is that ld.so will ask for "unmapped" private * memory to be allocated SOMEWHERE, but it also asks for memory explicitly * via MAP_FIXED at the lower * addresses starting at VA=0x0. * * If the two requests collide, you get authentic segfaulting action, so * you have to kick the "unmapped" base requests higher up. */ #define TASK_UNMAPPED_BASE (PAGE_ALIGN(TASK_SIZE/3)) #define task_pt_regs(task) \ ((struct pt_regs *)(task_stack_page(task) + THREAD_SIZE) - 1) #define KSTK_EIP(tsk) (pt_elr(task_pt_regs(tsk))) #define KSTK_ESP(tsk) (pt_psp(task_pt_regs(tsk))) /* Free all resources held by a thread; defined in process.c */ extern void release_thread(struct task_struct *dead_task); /* Get wait channel for task P. */ extern unsigned long get_wchan(struct task_struct *p); /* The following stuff is pretty HEXAGON specific. */ /* This is really just here for __switch_to. Offsets are pulled via asm-offsets.c */ /* * No real reason why VM and native switch stacks should be different. * Ultimately this should merge. Note that Rev C. ABI called out only * R24-27 as callee saved GPRs needing explicit attention (R29-31 being * dealt with automagically by allocframe), but the current ABI has * more, R16-R27. By saving more, the worst case is that we waste some * cycles if building with the old compilers. */ struct hexagon_switch_stack { union { struct { unsigned long r16; unsigned long r17; }; unsigned long long r1716; }; union { struct { unsigned long r18; unsigned long r19; }; unsigned long long r1918; }; union { struct { unsigned long r20; unsigned long r21; }; unsigned long long r2120; }; union { struct { unsigned long r22; unsigned long r23; }; unsigned long long r2322; }; union { struct { unsigned long r24; unsigned long r25; }; unsigned long long r2524; }; union { struct { unsigned long r26; unsigned long r27; }; unsigned long long r2726; }; unsigned long fp; unsigned long lr; }; #endif /* !__ASSEMBLY__ */ #endif
Name | Type | Size | Permission | Actions |
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Kbuild | File | 886 B | 0644 |
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asm-offsets.h | File | 35 B | 0644 |
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atomic.h | File | 5.27 KB | 0644 |
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bitops.h | File | 6.62 KB | 0644 |
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cache.h | File | 1.16 KB | 0644 |
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cacheflush.h | File | 3.8 KB | 0644 |
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checksum.h | File | 1.61 KB | 0644 |
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cmpxchg.h | File | 2.55 KB | 0644 |
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delay.h | File | 978 B | 0644 |
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dma-mapping.h | File | 1.31 KB | 0644 |
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dma.h | File | 934 B | 0644 |
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elf.h | File | 6.34 KB | 0644 |
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exec.h | File | 1.01 KB | 0644 |
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fixmap.h | File | 1.11 KB | 0644 |
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fpu.h | File | 90 B | 0644 |
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futex.h | File | 2.25 KB | 0644 |
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hexagon_vm.h | File | 6.39 KB | 0644 |
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intrinsics.h | File | 1003 B | 0644 |
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io.h | File | 6.95 KB | 0644 |
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irq.h | File | 1.13 KB | 0644 |
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irqflags.h | File | 1.46 KB | 0644 |
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kgdb.h | File | 1.36 KB | 0644 |
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linkage.h | File | 871 B | 0644 |
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mem-layout.h | File | 3.42 KB | 0644 |
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mmu.h | File | 1.1 KB | 0644 |
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mmu_context.h | File | 2.59 KB | 0644 |
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module.h | File | 910 B | 0644 |
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page.h | File | 4.74 KB | 0644 |
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perf_event.h | File | 841 B | 0644 |
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pgalloc.h | File | 4.08 KB | 0644 |
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pgtable.h | File | 14.15 KB | 0644 |
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processor.h | File | 3.8 KB | 0644 |
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smp.h | File | 1.31 KB | 0644 |
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spinlock.h | File | 3.84 KB | 0644 |
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spinlock_types.h | File | 1.15 KB | 0644 |
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string.h | File | 1.08 KB | 0644 |
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suspend.h | File | 872 B | 0644 |
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switch_to.h | File | 1.09 KB | 0644 |
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syscall.h | File | 1.38 KB | 0644 |
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thread_info.h | File | 4.05 KB | 0644 |
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time.h | File | 980 B | 0644 |
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timer-regs.h | File | 1.23 KB | 0644 |
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timex.h | File | 1.13 KB | 0644 |
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tlb.h | File | 1.21 KB | 0644 |
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tlbflush.h | File | 2.08 KB | 0644 |
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traps.h | File | 1.02 KB | 0644 |
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uaccess.h | File | 3.67 KB | 0644 |
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vdso.h | File | 941 B | 0644 |
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vm_fault.h | File | 993 B | 0644 |
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vm_mmu.h | File | 3.37 KB | 0644 |
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