1 /* SPDX-License-Identifier: GPL-2.0-or-later */
7 #include "target/target.h"
8 #include "target/register.h"
11 #include "helper/log.h"
16 /* Program interface. */
17 int riscv_program_init(struct riscv_program
*p
, struct target
*target
)
19 memset(p
, 0, sizeof(*p
));
21 p
->instruction_count
= 0;
22 p
->target_xlen
= riscv_xlen(target
);
23 for (size_t i
= 0; i
< RISCV_REGISTER_COUNT
; ++i
)
24 p
->writes_xreg
[i
] = 0;
26 for (size_t i
= 0; i
< RISCV_MAX_DEBUG_BUFFER_SIZE
; ++i
)
27 p
->debug_buffer
[i
] = -1;
32 int riscv_program_write(struct riscv_program
*program
)
34 for (unsigned i
= 0; i
< program
->instruction_count
; ++i
) {
35 LOG_DEBUG("debug_buffer[%02x] = DASM(0x%08x)", i
, program
->debug_buffer
[i
]);
36 if (riscv_write_debug_buffer(program
->target
, i
,
37 program
->debug_buffer
[i
]) != ERROR_OK
)
43 /** Add ebreak and execute the program. */
44 int riscv_program_exec(struct riscv_program
*p
, struct target
*t
)
48 riscv_reg_t saved_registers
[GDB_REGNO_XPR31
+ 1];
49 for (size_t i
= GDB_REGNO_ZERO
+ 1; i
<= GDB_REGNO_XPR31
; ++i
) {
50 if (p
->writes_xreg
[i
]) {
51 LOG_DEBUG("Saving register %d as used by program", (int)i
);
52 int result
= riscv_get_register(t
, &saved_registers
[i
], i
);
53 if (result
!= ERROR_OK
)
58 if (riscv_program_ebreak(p
) != ERROR_OK
) {
59 LOG_ERROR("Unable to write ebreak");
60 for (size_t i
= 0; i
< riscv_debug_buffer_size(p
->target
); ++i
)
61 LOG_ERROR("ram[%02x]: DASM(0x%08" PRIx32
") [0x%08" PRIx32
"]",
62 (int)i
, p
->debug_buffer
[i
], p
->debug_buffer
[i
]);
66 if (riscv_program_write(p
) != ERROR_OK
)
69 if (riscv_execute_debug_buffer(t
) != ERROR_OK
) {
70 LOG_DEBUG("Unable to execute program %p", p
);
74 for (size_t i
= 0; i
< riscv_debug_buffer_size(p
->target
); ++i
)
75 if (i
>= riscv_debug_buffer_size(p
->target
))
76 p
->debug_buffer
[i
] = riscv_read_debug_buffer(t
, i
);
78 for (size_t i
= GDB_REGNO_ZERO
; i
<= GDB_REGNO_XPR31
; ++i
)
79 if (p
->writes_xreg
[i
])
80 riscv_set_register(t
, i
, saved_registers
[i
]);
85 int riscv_program_sdr(struct riscv_program
*p
, enum gdb_regno d
, enum gdb_regno b
, int offset
)
87 return riscv_program_insert(p
, sd(d
, b
, offset
));
90 int riscv_program_swr(struct riscv_program
*p
, enum gdb_regno d
, enum gdb_regno b
, int offset
)
92 return riscv_program_insert(p
, sw(d
, b
, offset
));
95 int riscv_program_shr(struct riscv_program
*p
, enum gdb_regno d
, enum gdb_regno b
, int offset
)
97 return riscv_program_insert(p
, sh(d
, b
, offset
));
100 int riscv_program_sbr(struct riscv_program
*p
, enum gdb_regno d
, enum gdb_regno b
, int offset
)
102 return riscv_program_insert(p
, sb(d
, b
, offset
));
105 int riscv_program_ldr(struct riscv_program
*p
, enum gdb_regno d
, enum gdb_regno b
, int offset
)
107 return riscv_program_insert(p
, ld(d
, b
, offset
));
110 int riscv_program_lwr(struct riscv_program
*p
, enum gdb_regno d
, enum gdb_regno b
, int offset
)
112 return riscv_program_insert(p
, lw(d
, b
, offset
));
115 int riscv_program_lhr(struct riscv_program
*p
, enum gdb_regno d
, enum gdb_regno b
, int offset
)
117 return riscv_program_insert(p
, lh(d
, b
, offset
));
120 int riscv_program_lbr(struct riscv_program
*p
, enum gdb_regno d
, enum gdb_regno b
, int offset
)
122 return riscv_program_insert(p
, lb(d
, b
, offset
));
125 int riscv_program_csrrsi(struct riscv_program
*p
, enum gdb_regno d
, unsigned int z
, enum gdb_regno csr
)
127 assert(csr
>= GDB_REGNO_CSR0
&& csr
<= GDB_REGNO_CSR4095
);
128 return riscv_program_insert(p
, csrrsi(d
, z
, csr
- GDB_REGNO_CSR0
));
131 int riscv_program_csrrci(struct riscv_program
*p
, enum gdb_regno d
, unsigned int z
, enum gdb_regno csr
)
133 assert(csr
>= GDB_REGNO_CSR0
&& csr
<= GDB_REGNO_CSR4095
);
134 return riscv_program_insert(p
, csrrci(d
, z
, csr
- GDB_REGNO_CSR0
));
137 int riscv_program_csrr(struct riscv_program
*p
, enum gdb_regno d
, enum gdb_regno csr
)
139 assert(csr
>= GDB_REGNO_CSR0
&& csr
<= GDB_REGNO_CSR4095
);
140 return riscv_program_insert(p
, csrrs(d
, GDB_REGNO_ZERO
, csr
- GDB_REGNO_CSR0
));
143 int riscv_program_csrw(struct riscv_program
*p
, enum gdb_regno s
, enum gdb_regno csr
)
145 assert(csr
>= GDB_REGNO_CSR0
);
146 return riscv_program_insert(p
, csrrw(GDB_REGNO_ZERO
, s
, csr
- GDB_REGNO_CSR0
));
149 int riscv_program_fence_i(struct riscv_program
*p
)
151 return riscv_program_insert(p
, fence_i());
154 int riscv_program_fence(struct riscv_program
*p
)
156 return riscv_program_insert(p
, fence());
159 int riscv_program_ebreak(struct riscv_program
*p
)
161 struct target
*target
= p
->target
;
163 if (p
->instruction_count
== riscv_debug_buffer_size(p
->target
) &&
167 return riscv_program_insert(p
, ebreak());
170 int riscv_program_addi(struct riscv_program
*p
, enum gdb_regno d
, enum gdb_regno s
, int16_t u
)
172 return riscv_program_insert(p
, addi(d
, s
, u
));
175 int riscv_program_insert(struct riscv_program
*p
, riscv_insn_t i
)
177 if (p
->instruction_count
>= riscv_debug_buffer_size(p
->target
)) {
178 LOG_ERROR("Unable to insert instruction:");
179 LOG_ERROR(" instruction_count=%d", (int)p
->instruction_count
);
180 LOG_ERROR(" buffer size =%d", (int)riscv_debug_buffer_size(p
->target
));
184 p
->debug_buffer
[p
->instruction_count
] = i
;
185 p
->instruction_count
++;
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