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parisc: add KGDB support

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This patch add KGDB support to PA-RISC. It also implements
single-stepping utilizing the recovery counter.

Signed-off-by: Sven Schnelle <svens@stackframe.org>
Signed-off-by: Helge Deller <deller@gmx.de>
This commit is contained in:
Sven Schnelle
2019-04-04 21:14:10 +02:00
committed by Helge Deller
parent 620a53d522
commit eacbfce19d
5 changed files with 296 additions and 0 deletions
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68
arch/parisc/include/asm/kgdb.h Normal file
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/* SPDX-License-Identifier: GPL-2.0 */
/*
* PA-RISC KGDB support
*
* Copyright (c) 2019 Sven Schnelle <svens@stackframe.org>
*
*/
#ifndef __PARISC_KGDB_H__
#define __PARISC_KGDB_H__
#define BREAK_INSTR_SIZE 4
#define PARISC_KGDB_COMPILED_BREAK_INSN 0x3ffc01f
#define PARISC_KGDB_BREAK_INSN 0x3ffa01f
#define NUMREGBYTES sizeof(struct parisc_gdb_regs)
#define BUFMAX 4096
#define CACHE_FLUSH_IS_SAFE 1
#ifndef __ASSEMBLY__
static inline void arch_kgdb_breakpoint(void)
{
asm(".word %0" : : "i"(PARISC_KGDB_COMPILED_BREAK_INSN) : "memory");
}
struct parisc_gdb_regs {
unsigned long gpr[32];
unsigned long sar;
unsigned long iaoq_f;
unsigned long iasq_f;
unsigned long iaoq_b;
unsigned long iasq_b;
unsigned long eiem;
unsigned long iir;
unsigned long isr;
unsigned long ior;
unsigned long ipsw;
unsigned long __unused0;
unsigned long sr4;
unsigned long sr0;
unsigned long sr1;
unsigned long sr2;
unsigned long sr3;
unsigned long sr5;
unsigned long sr6;
unsigned long sr7;
unsigned long cr0;
unsigned long pid1;
unsigned long pid2;
unsigned long scrccr;
unsigned long pid3;
unsigned long pid4;
unsigned long cr24;
unsigned long cr25;
unsigned long cr26;
unsigned long cr27;
unsigned long cr28;
unsigned long cr29;
unsigned long cr30;
u64 fr[32];
};
#endif
#endif