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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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fa5da2f7bd
This code has suffered quite a bit of bitrot, do some basic tidying to get it to a reasonably functional state again. This gets the basic support and the console working again. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
104 lines
2.7 KiB
C
104 lines
2.7 KiB
C
/*
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* May be copied or modified under the terms of the GNU General Public
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* License. See linux/COPYING for more information.
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*
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* Based on original code by Glenn Engel, Jim Kingdon,
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* David Grothe <dave@gcom.com>, Tigran Aivazian, <tigran@sco.com> and
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* Amit S. Kale <akale@veritas.com>
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*
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* Super-H port based on sh-stub.c (Ben Lee and Steve Chamberlain) by
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* Henry Bell <henry.bell@st.com>
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*
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* Header file for low-level support for remote debug using GDB.
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*
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*/
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#ifndef __KGDB_H
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#define __KGDB_H
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#include <asm/ptrace.h>
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#include <asm/cacheflush.h>
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struct console;
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/* Same as pt_regs but has vbr in place of syscall_nr */
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struct kgdb_regs {
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unsigned long regs[16];
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unsigned long pc;
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unsigned long pr;
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unsigned long sr;
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unsigned long gbr;
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unsigned long mach;
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unsigned long macl;
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unsigned long vbr;
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};
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/* State info */
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extern char kgdb_in_gdb_mode;
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extern int kgdb_done_init;
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extern int kgdb_enabled;
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extern int kgdb_nofault; /* Ignore bus errors (in gdb mem access) */
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extern int kgdb_halt; /* Execute initial breakpoint at startup */
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extern char in_nmi; /* Debounce flag to prevent NMI reentry*/
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/* SCI */
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extern int kgdb_portnum;
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extern int kgdb_baud;
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extern char kgdb_parity;
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extern char kgdb_bits;
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/* Init and interface stuff */
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extern int kgdb_init(void);
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extern int (*kgdb_getchar)(void);
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extern void (*kgdb_putchar)(int);
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/* Trap functions */
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typedef void (kgdb_debug_hook_t)(struct pt_regs *regs);
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typedef void (kgdb_bus_error_hook_t)(void);
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extern kgdb_debug_hook_t *kgdb_debug_hook;
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extern kgdb_bus_error_hook_t *kgdb_bus_err_hook;
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/* Console */
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void kgdb_console_write(struct console *co, const char *s, unsigned count);
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extern int kgdb_console_setup(struct console *, char *);
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/* Prototypes for jmp fns */
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#define _JBLEN 9
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typedef int jmp_buf[_JBLEN];
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extern void longjmp(jmp_buf __jmpb, int __retval);
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extern int setjmp(jmp_buf __jmpb);
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/* Forced breakpoint */
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#define breakpoint() \
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do { \
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if (kgdb_enabled) \
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__asm__ __volatile__("trapa #0x3c"); \
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} while (0)
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/* KGDB should be able to flush all kernel text space */
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#if defined(CONFIG_CPU_SH4)
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#define kgdb_flush_icache_range(start, end) \
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{ \
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__flush_purge_region((void*)(start), (int)(end) - (int)(start));\
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flush_icache_range((start), (end)); \
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}
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#else
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#define kgdb_flush_icache_range(start, end) do { } while (0)
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#endif
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/* Taken from sh-stub.c of GDB 4.18 */
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static const char hexchars[] = "0123456789abcdef";
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/* Get high hex bits */
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static inline char highhex(const int x)
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{
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return hexchars[(x >> 4) & 0xf];
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}
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/* Get low hex bits */
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static inline char lowhex(const int x)
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{
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return hexchars[x & 0xf];
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}
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#endif
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