mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-16 16:23:14 +00:00
83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
132 lines
3.9 KiB
C
132 lines
3.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Copyright (C) 2001 - 2007 Tensilica Inc.
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*/
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#ifndef _XTENSA_PTRACE_H
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#define _XTENSA_PTRACE_H
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#include <compiler.h>
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/*
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* Kernel stack
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*
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* +-----------------------+ -------- STACK_SIZE
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* | register file | |
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* +-----------------------+ |
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* | struct pt_regs | |
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* +-----------------------+ | ------ PT_REGS_OFFSET
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* double : 16 bytes spill area : | ^
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* exception :- - - - - - - - - - - -: | |
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* frame : struct pt_regs : | |
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* :- - - - - - - - - - - -: | |
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* | | | |
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* | memory stack | | |
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* | | | |
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* ~ ~ ~ ~
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* ~ ~ ~ ~
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* | | | |
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* | | | |
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* +-----------------------+ | | --- STACK_BIAS
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* | struct task_struct | | | ^
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* current --> +-----------------------+ | | |
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* | struct thread_info | | | |
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* +-----------------------+ --------
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*/
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#define KERNEL_STACK_SIZE (2 * PAGE_SIZE)
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/* Offsets for exception_handlers[] (3 x 64-entries x 4-byte tables) */
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#define EXC_TABLE_KSTK 0x004 /* Kernel Stack */
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#define EXC_TABLE_DOUBLE_SAVE 0x008 /* Double exception save area for a0 */
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#define EXC_TABLE_FIXUP 0x00c /* Fixup handler */
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#define EXC_TABLE_PARAM 0x010 /* For passing a parameter to fixup */
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#define EXC_TABLE_SYSCALL_SAVE 0x014 /* For fast syscall handler */
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#define EXC_TABLE_FAST_USER 0x100 /* Fast user exception handler */
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#define EXC_TABLE_FAST_KERNEL 0x200 /* Fast kernel exception handler */
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#define EXC_TABLE_DEFAULT 0x300 /* Default C-Handler */
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#define EXC_TABLE_SIZE 0x400
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/* Registers used by strace */
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#define REG_A_BASE 0xfc000000
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#define REG_AR_BASE 0x04000000
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#define REG_PC 0x14000000
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#define REG_PS 0x080000e6
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#define REG_WB 0x08000048
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#define REG_WS 0x08000049
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#define REG_LBEG 0x08000000
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#define REG_LEND 0x08000001
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#define REG_LCOUNT 0x08000002
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#define REG_SAR 0x08000003
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#define REG_DEPC 0x080000c0
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#define REG_EXCCAUSE 0x080000e8
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#define REG_EXCVADDR 0x080000ee
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#define SYSCALL_NR 0x1
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#define AR_REGNO_TO_A_REGNO(ar, wb) (ar - wb*4) & ~(XCHAL_NUM_AREGS - 1)
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/* Other PTRACE_ values defined in <linux/ptrace.h> using values 0-9,16,17,24 */
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#define PTRACE_GETREGS 12
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#define PTRACE_SETREGS 13
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#define PTRACE_GETFPREGS 14
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#define PTRACE_SETFPREGS 15
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#define PTRACE_GETFPREGSIZE 18
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#ifndef __ASSEMBLY__
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/*
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* This struct defines the way the registers are stored on the
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* kernel stack during a system call or other kernel entry.
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*/
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struct pt_regs {
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unsigned long pc; /* 4 */
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unsigned long ps; /* 8 */
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unsigned long depc; /* 12 */
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unsigned long exccause; /* 16 */
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unsigned long excvaddr; /* 20 */
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unsigned long debugcause; /* 24 */
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unsigned long wmask; /* 28 */
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unsigned long lbeg; /* 32 */
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unsigned long lend; /* 36 */
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unsigned long lcount; /* 40 */
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unsigned long sar; /* 44 */
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unsigned long windowbase; /* 48 */
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unsigned long windowstart; /* 52 */
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unsigned long syscall; /* 56 */
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unsigned long icountlevel; /* 60 */
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int reserved[1]; /* 64 */
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/* Make sure the areg field is 16 bytes aligned */
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int align[0] __aligned(16);
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/* current register frame.
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* Note: The ESF for kernel exceptions ends after 16 registers!
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*/
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unsigned long areg[16]; /* 128 (64) */
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};
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#ifdef __KERNEL__
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# define task_pt_regs(tsk) ((struct pt_regs *) \
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(task_stack_page(tsk) + KERNEL_STACK_SIZE - (XCHAL_NUM_AREGS-16)*4) - 1)
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# define user_mode(regs) (((regs)->ps & 0x00000020) != 0)
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# define instruction_pointer(regs) ((regs)->pc)
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void show_regs(struct pt_regs *);
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# ifndef CONFIG_SMP
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# define profile_pc(regs) instruction_pointer(regs)
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# endif
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#endif /* __KERNEL__ */
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#else /* __ASSEMBLY__ */
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#ifdef __KERNEL__
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# include <asm/asm-offsets.h>
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#define PT_REGS_OFFSET (KERNEL_STACK_SIZE - PT_USER_SIZE)
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#endif
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#endif /* !__ASSEMBLY__ */
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#endif /* _XTENSA_PTRACE_H */
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