Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
98 lines
2.2 KiB
C
98 lines
2.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2023 Loongson Technology Corporation Limited
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*/
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#ifndef _ASM_LOONGARCH_KGDB_H
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#define _ASM_LOONGARCH_KGDB_H
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#define GDB_SIZEOF_REG sizeof(u64)
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/* gdb remote procotol expects the following register layout. */
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/*
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* General purpose registers:
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* r0-r31: 64 bit
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* orig_a0: 64 bit
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* pc : 64 bit
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* csr_badvaddr: 64 bit
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*/
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#define DBG_PT_REGS_BASE 0
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#define DBG_PT_REGS_NUM 35
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#define DBG_PT_REGS_END (DBG_PT_REGS_BASE + DBG_PT_REGS_NUM - 1)
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/*
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* Floating point registers:
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* f0-f31: 64 bit
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*/
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#define DBG_FPR_BASE (DBG_PT_REGS_END + 1)
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#define DBG_FPR_NUM 32
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#define DBG_FPR_END (DBG_FPR_BASE + DBG_FPR_NUM - 1)
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/*
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* Condition Flag registers:
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* fcc0-fcc8: 8 bit
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*/
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#define DBG_FCC_BASE (DBG_FPR_END + 1)
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#define DBG_FCC_NUM 8
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#define DBG_FCC_END (DBG_FCC_BASE + DBG_FCC_NUM - 1)
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/*
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* Floating-point Control and Status registers:
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* fcsr: 32 bit
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*/
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#define DBG_FCSR_NUM 1
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#define DBG_FCSR (DBG_FCC_END + 1)
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#define DBG_MAX_REG_NUM (DBG_FCSR + 1)
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/*
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* Size of I/O buffer for gdb packet.
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* considering to hold all register contents, size is set
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*/
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#define BUFMAX 2048
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/*
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* Number of bytes required for gdb_regs buffer.
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* PT_REGS and FPR: 8 bytes; FCSR: 4 bytes; FCC: 1 bytes.
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* GDB fails to connect for size beyond this with error
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* "'g' packet reply is too long"
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*/
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#define NUMREGBYTES ((DBG_PT_REGS_NUM + DBG_FPR_NUM) * GDB_SIZEOF_REG + DBG_FCC_NUM * 1 + DBG_FCSR_NUM * 4)
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#define BREAK_INSTR_SIZE 4
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#define CACHE_FLUSH_IS_SAFE 0
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/* Register numbers of various important registers. */
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enum dbg_loongarch_regnum {
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DBG_LOONGARCH_ZERO = 0,
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DBG_LOONGARCH_RA,
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DBG_LOONGARCH_TP,
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DBG_LOONGARCH_SP,
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DBG_LOONGARCH_A0,
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DBG_LOONGARCH_FP = 22,
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DBG_LOONGARCH_S0,
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DBG_LOONGARCH_S1,
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DBG_LOONGARCH_S2,
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DBG_LOONGARCH_S3,
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DBG_LOONGARCH_S4,
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DBG_LOONGARCH_S5,
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DBG_LOONGARCH_S6,
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DBG_LOONGARCH_S7,
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DBG_LOONGARCH_S8,
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DBG_LOONGARCH_ORIG_A0,
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DBG_LOONGARCH_PC,
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DBG_LOONGARCH_BADV
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};
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void kgdb_breakinst(void);
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void arch_kgdb_breakpoint(void);
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#ifdef CONFIG_KGDB
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bool kgdb_breakpoint_handler(struct pt_regs *regs);
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#else /* !CONFIG_KGDB */
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static inline bool kgdb_breakpoint_handler(struct pt_regs *regs) { return false; }
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#endif /* CONFIG_KGDB */
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#endif /* __ASM_KGDB_H_ */
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