| David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 1 | ############################################################################### |
| 2 | # |
| 3 | # MN10300 Low-level gdbstub routines |
| 4 | # |
| 5 | # Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. |
| 6 | # Written by David Howells (dhowells@redhat.com) |
| 7 | # |
| 8 | # This program is free software; you can redistribute it and/or |
| 9 | # modify it under the terms of the GNU General Public Licence |
| 10 | # as published by the Free Software Foundation; either version |
| 11 | # 2 of the Licence, or (at your option) any later version. |
| 12 | # |
| 13 | ############################################################################### |
| 14 | #include <linux/sys.h> |
| 15 | #include <linux/linkage.h> |
| 16 | #include <asm/smp.h> |
| 17 | #include <asm/cache.h> |
| 18 | #include <asm/cpu-regs.h> |
| 19 | #include <asm/exceptions.h> |
| 20 | #include <asm/frame.inc> |
| 21 | #include <asm/serial-regs.h> |
| 22 | |
| 23 | .text |
| 24 | |
| 25 | ############################################################################### |
| 26 | # |
| 27 | # GDB stub read memory with guard |
| 28 | # - D0 holds the memory address to read |
| 29 | # - D1 holds the address to store the byte into |
| 30 | # |
| 31 | ############################################################################### |
| 32 | .globl gdbstub_read_byte_guard |
| 33 | .globl gdbstub_read_byte_cont |
| 34 | ENTRY(gdbstub_read_byte) |
| 35 | mov d0,a0 |
| 36 | mov d1,a1 |
| 37 | clr d0 |
| 38 | gdbstub_read_byte_guard: |
| 39 | movbu (a0),d1 |
| 40 | gdbstub_read_byte_cont: |
| 41 | movbu d1,(a1) |
| 42 | ret [],0 |
| 43 | |
| 44 | .globl gdbstub_read_word_guard |
| 45 | .globl gdbstub_read_word_cont |
| 46 | ENTRY(gdbstub_read_word) |
| 47 | mov d0,a0 |
| 48 | mov d1,a1 |
| 49 | clr d0 |
| 50 | gdbstub_read_word_guard: |
| 51 | movhu (a0),d1 |
| 52 | gdbstub_read_word_cont: |
| 53 | movhu d1,(a1) |
| 54 | ret [],0 |
| 55 | |
| 56 | .globl gdbstub_read_dword_guard |
| 57 | .globl gdbstub_read_dword_cont |
| 58 | ENTRY(gdbstub_read_dword) |
| 59 | mov d0,a0 |
| 60 | mov d1,a1 |
| 61 | clr d0 |
| 62 | gdbstub_read_dword_guard: |
| 63 | mov (a0),d1 |
| 64 | gdbstub_read_dword_cont: |
| 65 | mov d1,(a1) |
| 66 | ret [],0 |
| 67 | |
| 68 | ############################################################################### |
| 69 | # |
| 70 | # GDB stub write memory with guard |
| 71 | # - D0 holds the byte to store |
| 72 | # - D1 holds the memory address to write |
| 73 | # |
| 74 | ############################################################################### |
| 75 | .globl gdbstub_write_byte_guard |
| 76 | .globl gdbstub_write_byte_cont |
| 77 | ENTRY(gdbstub_write_byte) |
| 78 | mov d0,a0 |
| 79 | mov d1,a1 |
| 80 | clr d0 |
| 81 | gdbstub_write_byte_guard: |
| 82 | movbu a0,(a1) |
| 83 | gdbstub_write_byte_cont: |
| 84 | ret [],0 |
| 85 | |
| 86 | .globl gdbstub_write_word_guard |
| 87 | .globl gdbstub_write_word_cont |
| 88 | ENTRY(gdbstub_write_word) |
| 89 | mov d0,a0 |
| 90 | mov d1,a1 |
| 91 | clr d0 |
| 92 | gdbstub_write_word_guard: |
| 93 | movhu a0,(a1) |
| 94 | gdbstub_write_word_cont: |
| 95 | ret [],0 |
| 96 | |
| 97 | .globl gdbstub_write_dword_guard |
| 98 | .globl gdbstub_write_dword_cont |
| 99 | ENTRY(gdbstub_write_dword) |
| 100 | mov d0,a0 |
| 101 | mov d1,a1 |
| 102 | clr d0 |
| 103 | gdbstub_write_dword_guard: |
| 104 | mov a0,(a1) |
| 105 | gdbstub_write_dword_cont: |
| 106 | ret [],0 |
| 107 | |
| 108 | ############################################################################### |
| 109 | # |
| 110 | # GDB stub BUG() trap |
| 111 | # |
| 112 | ############################################################################### |
| 113 | ENTRY(__gdbstub_bug_trap) |
| 114 | .byte 0xF7,0xF7 # don't use 0xFF as the JTAG unit preempts that |
| 115 | ret [],0 |