2d5973cb5a
Kgdb uses brki r16, 0x18 instruction to call low level _debug_exception function which save current state to pt_regs and call microblaze_kgdb_break function. _debug_exception should be called only from the kernel space. User space calling is not supported because user application debugging uses different handling. pt_regs_to_gdb_regs loads additional special registers which can't be changed * Enable KGDB in Kconfig * Remove ancient not-tested KGDB support * Remove ancient _debug_exception code from entry.S Only MMU KGDB support is supported. Signed-off-by: Michal Simek <monstr@monstr.eu> CC: Jason Wessel <jason.wessel@windriver.com> CC: John Williams <john.williams@petalogix.com> CC: Edgar E. Iglesias <edgar.iglesias@petalogix.com> CC: linux-kernel@vger.kernel.org Acked-by: Jason Wessel <jason.wessel@windriver.com>
29 lines
622 B
C
29 lines
622 B
C
#ifdef __KERNEL__
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#ifndef __MICROBLAZE_KGDB_H__
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#define __MICROBLAZE_KGDB_H__
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#ifndef __ASSEMBLY__
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#define CACHE_FLUSH_IS_SAFE 1
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#define BUFMAX 2048
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/*
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* 32 32-bit general purpose registers (r0-r31)
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* 6 32-bit special registers (pc, msr, ear, esr, fsr, btr)
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* 12 32-bit PVR
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* 7 32-bit MMU Regs (redr, rpid, rzpr, rtlbx, rtlbsx, rtlblo, rtlbhi)
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* ------
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* 57 registers
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*/
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#define NUMREGBYTES (57 * 4)
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#define BREAK_INSTR_SIZE 4
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static inline void arch_kgdb_breakpoint(void)
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{
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__asm__ __volatile__("brki r16, 0x18;");
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}
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#endif /* __ASSEMBLY__ */
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#endif /* __MICROBLAZE_KGDB_H__ */
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#endif /* __KERNEL__ */
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