+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
#ifndef RISCV_H
#define RISCV_H
#include <stdint.h>
#include "opcodes.h"
#include "gdb_regs.h"
+#include "jtag/jtag.h"
+#include "target/register.h"
+#include "target/semihosting_common.h"
+#include <helper/command.h>
/* The register cache is statically allocated. */
-#define RISCV_MAX_HARTS 32
+#define RISCV_MAX_HARTS 1024
#define RISCV_MAX_REGISTERS 5000
#define RISCV_MAX_TRIGGERS 32
#define RISCV_MAX_HWBPS 16
#define DEFAULT_COMMAND_TIMEOUT_SEC 2
#define DEFAULT_RESET_TIMEOUT_SEC 30
+#define RISCV_SATP_MODE(xlen) ((xlen) == 32 ? SATP32_MODE : SATP64_MODE)
+#define RISCV_SATP_PPN(xlen) ((xlen) == 32 ? SATP32_PPN : SATP64_PPN)
+#define RISCV_PGSHIFT 12
+
+# define PG_MAX_LEVEL 4
+
+#define RISCV_NUM_MEM_ACCESS_METHODS 3
+
extern struct target_type riscv011_target;
extern struct target_type riscv013_target;
typedef uint32_t riscv_insn_t;
typedef uint64_t riscv_addr_t;
+enum riscv_mem_access_method {
+ RISCV_MEM_ACCESS_UNSPECIFIED,
+ RISCV_MEM_ACCESS_PROGBUF,
+ RISCV_MEM_ACCESS_SYSBUS,
+ RISCV_MEM_ACCESS_ABSTRACT
+};
+
enum riscv_halt_reason {
RISCV_HALT_INTERRUPT,
RISCV_HALT_BREAKPOINT,
RISCV_HALT_SINGLESTEP,
RISCV_HALT_TRIGGER,
RISCV_HALT_UNKNOWN,
+ RISCV_HALT_GROUP,
RISCV_HALT_ERROR
};
unsigned custom_number;
} riscv_reg_info_t;
+#define RISCV_SAMPLE_BUF_TIMESTAMP_BEFORE 0x80
+#define RISCV_SAMPLE_BUF_TIMESTAMP_AFTER 0x81
+struct riscv_sample_buf {
+ uint8_t *buf;
+ unsigned int used;
+ unsigned int size;
+};
+
typedef struct {
+ bool enabled;
+ struct {
+ bool enabled;
+ target_addr_t address;
+ uint32_t size_bytes;
+ } bucket[16];
+} riscv_sample_config_t;
+
+typedef struct {
+ struct list_head list;
+ uint16_t low, high;
+ char *name;
+} range_list_t;
+
+struct riscv_info {
unsigned dtm_version;
struct command_context *cmd_ctx;
void *version_specific;
- /* The number of harts on this system. */
- int hart_count;
-
- /* The hart that the RTOS thinks is currently being debugged. */
- int rtos_hartid;
-
/* The hart that is currently being debugged. Note that this is
* different than the hartid that the RTOS is expected to use. This
* one will change all the time, it's more of a global argument to
* every function than an actual */
int current_hartid;
- /* Enough space to store all the registers we might need to save. */
- /* FIXME: This should probably be a bunch of register caches. */
- uint64_t saved_registers[RISCV_MAX_HARTS][RISCV_MAX_REGISTERS];
- bool valid_saved_registers[RISCV_MAX_HARTS][RISCV_MAX_REGISTERS];
-
- /* OpenOCD's register cache points into here. This is not per-hart because
- * we just invalidate the entire cache when we change which hart is
- * selected. */
- uint64_t reg_cache_values[RISCV_MAX_REGISTERS];
-
/* Single buffer that contains all register names, instead of calling
* malloc for each register. Needs to be freed when reg_list is freed. */
char *reg_names;
/* It's possible that each core has a different supported ISA set. */
- int xlen[RISCV_MAX_HARTS];
- riscv_reg_t misa[RISCV_MAX_HARTS];
+ int xlen;
+ riscv_reg_t misa;
+ /* Cached value of vlenb. 0 if vlenb is not readable for some reason. */
+ unsigned int vlenb;
/* The number of triggers per hart. */
- unsigned trigger_count[RISCV_MAX_HARTS];
+ unsigned int trigger_count;
/* For each physical trigger, contains -1 if the hwbp is available, or the
* unique_id of the breakpoint/watchpoint that is using it.
int trigger_unique_id[RISCV_MAX_HWBPS];
/* The number of entries in the debug buffer. */
- int debug_buffer_size[RISCV_MAX_HARTS];
-
- /* This avoids invalidating the register cache too often. */
- bool registers_initialized;
+ int debug_buffer_size;
/* This hart contains an implicit ebreak at the end of the program buffer. */
bool impebreak;
* delays, causing them to be relearned. Used for testing. */
int reset_delays_wait;
+ /* This target has been prepped and is ready to step/resume. */
+ bool prepped;
+ /* This target was selected using hasel. */
+ bool selected;
+
/* Helper functions that target the various RISC-V debug spec
* implementations. */
- int (*get_register)(struct target *target,
- riscv_reg_t *value, int hid, int rid);
- int (*set_register)(struct target *target, int hartid, int regid,
- uint64_t value);
+ int (*get_register)(struct target *target, riscv_reg_t *value, int regid);
+ int (*set_register)(struct target *target, int regid, uint64_t value);
+ int (*get_register_buf)(struct target *target, uint8_t *buf, int regno);
+ int (*set_register_buf)(struct target *target, int regno,
+ const uint8_t *buf);
int (*select_current_hart)(struct target *target);
bool (*is_halted)(struct target *target);
- int (*halt_current_hart)(struct target *target);
- int (*resume_current_hart)(struct target *target);
+ /* Resume this target, as well as every other prepped target that can be
+ * resumed near-simultaneously. Clear the prepped flag on any target that
+ * was resumed. */
+ int (*resume_go)(struct target *target);
int (*step_current_hart)(struct target *target);
int (*on_halt)(struct target *target);
- int (*on_resume)(struct target *target);
+ /* Get this target as ready as possible to resume, without actually
+ * resuming. */
+ int (*resume_prep)(struct target *target);
+ int (*halt_prep)(struct target *target);
+ int (*halt_go)(struct target *target);
int (*on_step)(struct target *target);
enum riscv_halt_reason (*halt_reason)(struct target *target);
int (*write_debug_buffer)(struct target *target, unsigned index,
void (*fill_dmi_read_u64)(struct target *target, char *buf, int a);
void (*fill_dmi_nop_u64)(struct target *target, char *buf);
- int (*authdata_read)(struct target *target, uint32_t *value);
- int (*authdata_write)(struct target *target, uint32_t value);
+ int (*authdata_read)(struct target *target, uint32_t *value, unsigned int index);
+ int (*authdata_write)(struct target *target, uint32_t value, unsigned int index);
int (*dmi_read)(struct target *target, uint32_t *value, uint32_t address);
int (*dmi_write)(struct target *target, uint32_t address, uint32_t value);
int (*test_sba_config_reg)(struct target *target, target_addr_t legal_address,
uint32_t num_words, target_addr_t illegal_address, bool run_sbbusyerror_test);
- int (*test_compliance)(struct target *target);
-} riscv_info_t;
+ int (*sample_memory)(struct target *target,
+ struct riscv_sample_buf *buf,
+ riscv_sample_config_t *config,
+ int64_t until_ms);
+
+ int (*read_memory)(struct target *target, target_addr_t address,
+ uint32_t size, uint32_t count, uint8_t *buffer, uint32_t increment);
+
+ /* How many harts are attached to the DM that this target is attached to? */
+ int (*hart_count)(struct target *target);
+ unsigned (*data_bits)(struct target *target);
+
+ COMMAND_HELPER((*print_info), struct target *target);
+
+ /* Storage for vector register types. */
+ struct reg_data_type_vector vector_uint8;
+ struct reg_data_type_vector vector_uint16;
+ struct reg_data_type_vector vector_uint32;
+ struct reg_data_type_vector vector_uint64;
+ struct reg_data_type_vector vector_uint128;
+ struct reg_data_type type_uint8_vector;
+ struct reg_data_type type_uint16_vector;
+ struct reg_data_type type_uint32_vector;
+ struct reg_data_type type_uint64_vector;
+ struct reg_data_type type_uint128_vector;
+ struct reg_data_type_union_field vector_fields[5];
+ struct reg_data_type_union vector_union;
+ struct reg_data_type type_vector;
+
+ /* Set when trigger registers are changed by the user. This indicates we eed
+ * to beware that we may hit a trigger that we didn't realize had been set. */
+ bool manual_hwbp_set;
+
+ /* Memory access methods to use, ordered by priority, highest to lowest. */
+ int mem_access_methods[RISCV_NUM_MEM_ACCESS_METHODS];
+
+ /* Different memory regions may need different methods but single configuration is applied
+ * for all. Following flags are used to warn only once about failing memory access method. */
+ bool mem_access_progbuf_warn;
+ bool mem_access_sysbus_warn;
+ bool mem_access_abstract_warn;
+
+ /* In addition to the ones in the standard spec, we'll also expose additional
+ * CSRs in this list. */
+ struct list_head expose_csr;
+ /* Same, but for custom registers.
+ * Custom registers are for non-standard extensions and use abstract register numbers
+ * from range 0xc000 ... 0xffff. */
+ struct list_head expose_custom;
+
+ riscv_sample_config_t sample_config;
+ struct riscv_sample_buf sample_buf;
+};
+
+COMMAND_HELPER(riscv_print_info_line, const char *section, const char *key,
+ unsigned int value);
+
+typedef struct {
+ uint8_t tunneled_dr_width;
+ struct scan_field tunneled_dr[4];
+} riscv_bscan_tunneled_scan_context_t;
+
+typedef struct {
+ const char *name;
+ int level;
+ unsigned va_bits;
+ unsigned pte_shift;
+ unsigned vpn_shift[PG_MAX_LEVEL];
+ unsigned vpn_mask[PG_MAX_LEVEL];
+ unsigned pte_ppn_shift[PG_MAX_LEVEL];
+ unsigned pte_ppn_mask[PG_MAX_LEVEL];
+ unsigned pa_ppn_shift[PG_MAX_LEVEL];
+ unsigned pa_ppn_mask[PG_MAX_LEVEL];
+} virt2phys_info_t;
/* Wall-clock timeout for a command/access. Settable via RISC-V Target commands.*/
extern int riscv_command_timeout_sec;
/* Wall-clock timeout after reset. Settable via RISC-V Target commands.*/
extern int riscv_reset_timeout_sec;
-extern bool riscv_prefer_sba;
+extern bool riscv_enable_virtual;
+extern bool riscv_ebreakm;
+extern bool riscv_ebreaks;
+extern bool riscv_ebreaku;
/* Everything needs the RISC-V specific info structure, so here's a nice macro
* that provides that. */
-static inline riscv_info_t *riscv_info(const struct target *target) __attribute__((unused));
-static inline riscv_info_t *riscv_info(const struct target *target)
-{ return target->arch_info; }
-#define RISCV_INFO(R) riscv_info_t *R = riscv_info(target);
+static inline struct riscv_info *riscv_info(const struct target *target) __attribute__((unused));
+static inline struct riscv_info *riscv_info(const struct target *target)
+{
+ assert(target->arch_info);
+ return target->arch_info;
+}
+#define RISCV_INFO(R) struct riscv_info *R = riscv_info(target);
extern uint8_t ir_dtmcontrol[4];
extern struct scan_field select_dtmcontrol;
extern uint8_t ir_idcode[4];
extern struct scan_field select_idcode;
+extern struct scan_field select_user4;
+extern struct scan_field *bscan_tunneled_select_dmi;
+extern uint32_t bscan_tunneled_select_dmi_num_fields;
+typedef enum { BSCAN_TUNNEL_NESTED_TAP, BSCAN_TUNNEL_DATA_REGISTER } bscan_tunnel_type_t;
+extern int bscan_tunnel_ir_width;
+extern bscan_tunnel_type_t bscan_tunnel_type;
+
+uint32_t dtmcontrol_scan_via_bscan(struct target *target, uint32_t out);
+void select_dmi_via_bscan(struct target *target);
+
/*** OpenOCD Interface */
int riscv_openocd_poll(struct target *target);
-int riscv_openocd_halt(struct target *target);
+int riscv_halt(struct target *target);
-int riscv_openocd_resume(
+int riscv_resume(
struct target *target,
int current,
target_addr_t address,
int handle_breakpoints,
- int debug_execution
+ int debug_execution,
+ bool single_hart
);
int riscv_openocd_step(
/*** RISC-V Interface ***/
/* Initializes the shared RISC-V structure. */
-void riscv_info_init(struct target *target, riscv_info_t *r);
-
-/* Run control, possibly for multiple harts. The _all_harts versions resume
- * all the enabled harts, which when running in RTOS mode is all the harts on
- * the system. */
-int riscv_halt_all_harts(struct target *target);
-int riscv_halt_one_hart(struct target *target, int hartid);
-int riscv_resume_all_harts(struct target *target);
-int riscv_resume_one_hart(struct target *target, int hartid);
+void riscv_info_init(struct target *target, struct riscv_info *r);
/* Steps the hart that's currently selected in the RTOS, or if there is no RTOS
* then the only hart. */
int riscv_step_rtos_hart(struct target *target);
-bool riscv_supports_extension(struct target *target, int hartid, char letter);
+bool riscv_supports_extension(struct target *target, char letter);
/* Returns XLEN for the given (or current) hart. */
-int riscv_xlen(const struct target *target);
-int riscv_xlen_of_hart(const struct target *target, int hartid);
-
-bool riscv_rtos_enabled(const struct target *target);
+unsigned riscv_xlen(const struct target *target);
+int riscv_xlen_of_hart(const struct target *target);
/* Sets the current hart, which is the hart that will actually be used when
* issuing debug commands. */
int riscv_set_current_hartid(struct target *target, int hartid);
+int riscv_select_current_hart(struct target *target);
int riscv_current_hartid(const struct target *target);
/*** Support functions for the RISC-V 'RTOS', which provides multihart support
* without requiring multiple targets. */
-/* When using the RTOS to debug, this selects the hart that is currently being
- * debugged. This doesn't propagate to the hardware. */
-void riscv_set_all_rtos_harts(struct target *target);
-void riscv_set_rtos_hartid(struct target *target, int hartid);
-
/* Lists the number of harts in the system, which are assumed to be
* consecutive and start with mhartid=0. */
int riscv_count_harts(struct target *target);
-/* Returns TRUE if the target has the given register on the given hart. */
-bool riscv_has_register(struct target *target, int hartid, int regid);
-
-/* Returns the value of the given register on the given hart. 32-bit registers
- * are zero extended to 64 bits. */
+/** Set register, updating the cache. */
int riscv_set_register(struct target *target, enum gdb_regno i, riscv_reg_t v);
-int riscv_set_register_on_hart(struct target *target, int hid, enum gdb_regno rid, uint64_t v);
+/** Get register, from the cache if it's in there. */
int riscv_get_register(struct target *target, riscv_reg_t *value,
enum gdb_regno r);
-int riscv_get_register_on_hart(struct target *target, riscv_reg_t *value,
- int hartid, enum gdb_regno regid);
/* Checks the state of the current hart -- "is_halted" checks the actual
* on-device register. */
/* Invalidates the register cache. */
void riscv_invalidate_register_cache(struct target *target);
-/* Returns TRUE when a hart is enabled in this target. */
-bool riscv_hart_enabled(struct target *target, int hartid);
-
int riscv_enumerate_triggers(struct target *target);
int riscv_add_breakpoint(struct target *target, struct breakpoint *breakpoint);
int riscv_init_registers(struct target *target);
void riscv_semihosting_init(struct target *target);
-int riscv_semihosting(struct target *target, int *retval);
+
+enum semihosting_result riscv_semihosting(struct target *target, int *retval);
+
+void riscv_add_bscan_tunneled_scan(struct target *target, struct scan_field *field,
+ riscv_bscan_tunneled_scan_context_t *ctxt);
+
+int riscv_read_by_any_size(struct target *target, target_addr_t address, uint32_t size, uint8_t *buffer);
+int riscv_write_by_any_size(struct target *target, target_addr_t address, uint32_t size, uint8_t *buffer);
#endif
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