2 * Copyright(c) 2013 Intel Corporation.
4 * Adrian Burns (adrian.burns@intel.com)
5 * Thomas Faust (thomas.faust@intel.com)
6 * Ivan De Cesaris (ivan.de.cesaris@intel.com)
7 * Julien Carreno (julien.carreno@intel.com)
8 * Jeffrey Maxwell (jeffrey.r.maxwell@intel.com)
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of version 2 of the GNU General Public License as
12 * published by the Free Software Foundation.
14 * This program is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
23 * Contact Information:
29 * This is the interface to the x86 32 bit memory and breakpoint operations.
32 #ifndef X86_32_COMMON_H
33 #define X86_32_COMMON_H
35 #include <jtag/jtag.h>
36 #include <helper/command.h>
37 #include <helper/types.h>
39 extern const struct command_registration x86_32_command_handlers[];
41 /* for memory access */
46 #define EFLAGS_TF ((uint32_t)0x00000100) /* Trap Flag */
47 #define EFLAGS_IF ((uint32_t)0x00000200) /* Interrupt Flag */
48 #define EFLAGS_RF ((uint32_t)0x00010000) /* Resume Flag */
49 #define EFLAGS_VM86 ((uint32_t)0x00020000) /* Virtual 8086 Mode */
51 #define CSAR_DPL ((uint32_t)0x00006000)
52 #define CSAR_D ((uint32_t)0x00400000)
53 #define SSAR_DPL ((uint32_t)0x00006000)
55 #define CR0_PE ((uint32_t)0x00000001) /* Protected Mode Enable */
56 #define CR0_NW ((uint32_t)0x20000000) /* Non Write-Through */
57 #define CR0_CD ((uint32_t)0x40000000) /* Cache Disable */
58 #define CR0_PG ((uint32_t)0x80000000) /* Paging Enable */
60 /* TODO - move back to PM specific file */
61 #define PM_DR6 ((uint32_t)0xFFFF0FF0)
63 #define DR6_BRKDETECT_0 ((uint32_t)0x00000001) /* B0 through B3 */
64 #define DR6_BRKDETECT_1 ((uint32_t)0x00000002) /* breakpoint condition detected */
65 #define DR6_BRKDETECT_2 ((uint32_t)0x00000004)
66 #define DR6_BRKDETECT_3 ((uint32_t)0x00000008)
69 /* general purpose registers */
78 /* instruction pointer & flags */
82 /* segment registers */
90 /* floating point unit registers */
108 /* control registers */
114 /* debug registers */
122 /* descriptor tables */
135 /* segment registers */
162 #define X86_32_COMMON_MAGIC 0x86328632
165 /* memory read/write */
191 /* lakemont1 core shadow ram access opcodes */
198 struct swbp_mem_patch {
200 uint32_t swbp_unique_id;
202 struct swbp_mem_patch *next;
205 /* TODO - probemode specific - consider removing */
206 #define NUM_PM_REGS 18 /* regs used in save/restore */
208 struct x86_32_common {
209 uint32_t common_magic;
211 struct reg_cache *cache;
212 struct jtag_tap *curr_tap;
216 /* pm_regs are for probemode save/restore state */
217 uint32_t pm_regs[NUM_PM_REGS];
219 /* working area for fastdata access */
220 struct working_area *fast_data_area;
223 struct x86_32_dbg_reg *hw_break_list;
224 struct swbp_mem_patch *swbbp_mem_patch_list;
226 /* core probemode implementation dependent functions */
227 uint8_t (*get_num_user_regs)(struct target *t);
228 bool (*is_paging_enabled)(struct target *t);
229 int (*disable_paging)(struct target *t);
230 int (*enable_paging)(struct target *t);
231 bool (*sw_bpts_supported)(struct target *t);
232 int (*transaction_status)(struct target *t);
233 int (*submit_instruction)(struct target *t, int num);
234 int (*read_hw_reg)(struct target *t, int reg, uint32_t *regval, uint8_t cache);
235 int (*write_hw_reg)(struct target *t, int reg,
236 uint32_t regval, uint8_t cache);
238 /* register cache to processor synchronization */
239 int (*read_hw_reg_to_cache)(struct target *target, int num);
240 int (*write_hw_reg_from_cache)(struct target *target, int num);
243 static inline struct x86_32_common *
244 target_to_x86_32(struct target *target)
246 return target->arch_info;
248 bool check_not_halted(const struct target *t);
250 /* breakpoint defines */
251 #define MAX_DEBUG_REGS 4
252 #define SW_BP_OPCODE 0xf1
253 #define MAX_SW_BPTS 20
255 struct x86_32_dbg_reg {
260 #define DR7_G_ENABLE_SHIFT 1
261 #define DR7_ENABLE_SIZE 2 /* 2 bits per debug reg */
262 #define DR7_RW_SHIFT 16
263 #define DR7_LENGTH_SHIFT 18
264 #define DR7_RW_LEN_SIZE 4
265 #define DR7_BP_EXECUTE 0 /* 00 - only on instruction execution*/
266 #define DR7_BP_WRITE 1 /* 01 - only on data writes */
267 /*#define DR7_RW_IORW 2 UNSUPPORTED 10 - an I/O read and I/O write */
268 #define DR7_BP_READWRITE 3 /* on data read or data write */
269 #define DR7_BP_LENGTH_1 0 /* 00 - 1 byte length */
270 #define DR7_BP_LENGTH_2 1 /* 01 - 2 byte length */
271 #define DR7_BP_LENGTH_4 3 /* 11 - 4 byte length */
273 #define DR7_GLOBAL_ENABLE(val, regnum) \
274 (val |= (1 << (DR7_G_ENABLE_SHIFT + (DR7_ENABLE_SIZE * (regnum)))))
276 #define DR7_GLOBAL_DISABLE(val, regnum) \
277 (val &= ~(3 << (DR7_ENABLE_SIZE * (regnum))))
279 #define DR7_BP_FREE(val, regnum) \
280 ((val & (3 << (DR7_ENABLE_SIZE * (regnum)))) == 0)
282 #define DR7_RESET_RWLEN_BITS(val, regnum) \
283 (val &= ~(0x0f << (DR7_RW_SHIFT + DR7_RW_LEN_SIZE * (regnum))))
285 #define DR7_SET_EXE(val, regnum) \
286 (val &= ~(0x0f << (DR7_RW_SHIFT + DR7_RW_LEN_SIZE * (regnum))))
288 #define DR7_SET_WRITE(val, regnum) \
289 (val |= (DR7_BP_WRITE << (DR7_RW_SHIFT + DR7_RW_LEN_SIZE * (regnum))))
291 #define DR7_SET_ACCESS(val, regnum) \
292 (val |= (DR7_BP_READWRITE << (DR7_RW_SHIFT + DR7_RW_LEN_SIZE * (regnum))))
294 #define DR7_SET_LENGTH(val, regnum, len) \
295 (val |= (len == 1) ? (DR7_BP_LENGTH_1 << (DR7_LENGTH_SHIFT + DR7_RW_LEN_SIZE * (regnum))) : \
296 (len == 2) ? (DR7_BP_LENGTH_2 << (DR7_LENGTH_SHIFT + DR7_RW_LEN_SIZE * (regnum))) : \
297 (DR7_BP_LENGTH_4 << (DR7_LENGTH_SHIFT + DR7_RW_LEN_SIZE * (regnum))))
299 /* public interface */
300 int x86_32_get_gdb_reg_list(struct target *t,
301 struct reg **reg_list[], int *reg_list_size,
302 enum target_register_class reg_class);
303 int x86_32_common_init_arch_info(struct target *target,
304 struct x86_32_common *x86_32);
305 int x86_32_common_mmu(struct target *t, int *enabled);
306 int x86_32_common_virt2phys(struct target *t, uint32_t address, uint32_t *physical);
307 int x86_32_common_read_phys_mem(struct target *t, uint32_t phys_address,
308 uint32_t size, uint32_t count, uint8_t *buffer);
309 int x86_32_common_write_phys_mem(struct target *t, uint32_t phys_address,
310 uint32_t size, uint32_t count, const uint8_t *buffer);
311 int x86_32_common_read_memory(struct target *t, uint32_t addr,
312 uint32_t size, uint32_t count, uint8_t *buf);
313 int x86_32_common_write_memory(struct target *t, uint32_t addr,
314 uint32_t size, uint32_t count, const uint8_t *buf);
315 int x86_32_common_read_io(struct target *t, uint32_t addr,
316 uint32_t size, uint8_t *buf);
317 int x86_32_common_write_io(struct target *t, uint32_t addr,
318 uint32_t size, const uint8_t *buf);
319 int x86_32_common_add_breakpoint(struct target *t, struct breakpoint *bp);
320 int x86_32_common_remove_breakpoint(struct target *t, struct breakpoint *bp);
321 int x86_32_common_add_watchpoint(struct target *t, struct watchpoint *wp);
322 int x86_32_common_remove_watchpoint(struct target *t, struct watchpoint *wp);
324 #endif /* X86_32_COMMON_H */