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processor.h

/* SPDX-License-Identifier: GPL-2.0-only */ /* * Process/processor support for the Hexagon architecture * * Copyright (c) 2010-2012, The Linux Foundation. All rights reserved. */ #ifndef _ASM_PROCESSOR_H #define _ASM_PROCESSOR_H #ifndef __ASSEMBLY__ #include <asm/mem-layout.h> #include <asm/registers.h> #include <asm/hexagon_vm.h> /* 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))) 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

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docroot: /var/www/469ed2f6-4d4b-4a8a-9f5e-ee4ef04d3bc8/public_html

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curdir: /usr/src/linux-headers-6.8.0-100/arch/hexagon/include/asm

	.		4096
	..		4096
X	Kbuild		131
X	asm-offsets.h		35
X	atomic.h		3210
X	bitops.h		6615
X	cache.h		555
X	cacheflush.h		2871
X	checksum.h		685
X	cmpxchg.h		2020
X	delay.h		344
X	dma.h		300
X	elf.h		5758
X	exec.h		398
X	fixmap.h		369
X	fpu.h		90
X	futex.h		2306
X	hexagon_vm.h		5909
X	intrinsics.h		369
X	io.h		6784
X	irq.h		576
X	irqflags.h		860
X	kgdb.h		754
X	linkage.h		237
X	mem-layout.h		2865
X	mmu.h		490
X	mmu_context.h		1544
X	page.h		4052
X	perf_event.h		207
X	pgalloc.h		2743
X	pgtable.h		11249
X	processor.h		3011
X	ptrace.h		626
X	smp.h		707
X	spinlock.h		3295
X	spinlock_types.h		549
X	string.h		472
X	suspend.h		238
X	switch_to.h		478
X	syscall.h		1170
X	syscalls.h		204
X	thread_info.h		3344
X	time.h		346
X	timex.h		495
X	tlb.h		253
X	tlbflush.h		1497
X	traps.h		410
X	uaccess.h		1122
X	vdso.h		307
X	vermagic.h		299
X	vm_fault.h		359
X	vm_mmu.h		2818
X	vmalloc.h		99