src/target/riscv/batch.c

   1 #ifdef HAVE_CONFIG_H
   2 #include "config.h"
   3 #endif
   4
   5 #include "batch.h"
   6 #include "debug_defines.h"
   7 #include "riscv.h"
   8
   9 #define get_field(reg, mask) (((reg) & (mask)) / ((mask) & ~((mask) << 1)))
  10 #define set_field(reg, mask, val) (((reg) & ~(mask)) | (((val) * ((mask) & ~((mask) << 1))) & (mask)))
  11
  12 static void dump_field(int idle, const struct scan_field *field);
  13
  14 struct riscv_batch *riscv_batch_alloc(struct target *target, size_t scans, size_t idle)
  15 {
  16         scans += 4;
  17         struct riscv_batch *out = calloc(1, sizeof(*out));
  18         out->target = target;
  19         out->allocated_scans = scans;
  20         out->idle_count = idle;
  21         out->data_out = malloc(sizeof(*out->data_out) * (scans) * sizeof(uint64_t));
  22         out->data_in  = malloc(sizeof(*out->data_in)  * (scans) * sizeof(uint64_t));
  23         out->fields = malloc(sizeof(*out->fields) * (scans));
  24         out->last_scan = RISCV_SCAN_TYPE_INVALID;
  25         out->read_keys = malloc(sizeof(*out->read_keys) * (scans));
  26         return out;
  27 }
  28
  29 void riscv_batch_free(struct riscv_batch *batch)
  30 {
  31         free(batch->data_in);
  32         free(batch->data_out);
  33         free(batch->fields);
  34         free(batch);
  35 }
  36
  37 bool riscv_batch_full(struct riscv_batch *batch)
  38 {
  39         return batch->used_scans > (batch->allocated_scans - 4);
  40 }
  41
  42 int riscv_batch_run(struct riscv_batch *batch)
  43 {
  44         if (batch->used_scans == 0) {
  45                 LOG_DEBUG("Ignoring empty batch.");
  46                 return ERROR_OK;
  47         }
  48
  49         keep_alive();
  50
  51         riscv_batch_add_nop(batch);
  52
  53         for (size_t i = 0; i < batch->used_scans; ++i) {
  54                 jtag_add_dr_scan(batch->target->tap, 1, batch->fields + i, TAP_IDLE);
  55                 if (batch->idle_count > 0)
  56                         jtag_add_runtest(batch->idle_count, TAP_IDLE);
  57         }
  58
  59         if (jtag_execute_queue() != ERROR_OK) {
  60                 LOG_ERROR("Unable to execute JTAG queue");
  61                 return ERROR_FAIL;
  62         }
  63
  64         for (size_t i = 0; i < batch->used_scans; ++i)
  65                 dump_field(batch->idle_count, batch->fields + i);
  66
  67         return ERROR_OK;
  68 }
  69
  70 void riscv_batch_add_dmi_write(struct riscv_batch *batch, unsigned address, uint64_t data)
  71 {
  72         assert(batch->used_scans < batch->allocated_scans);
  73         struct scan_field *field = batch->fields + batch->used_scans;
  74         field->num_bits = riscv_dmi_write_u64_bits(batch->target);
  75         field->out_value = (void *)(batch->data_out + batch->used_scans * sizeof(uint64_t));
  76         field->in_value  = (void *)(batch->data_in  + batch->used_scans * sizeof(uint64_t));
  77         riscv_fill_dmi_write_u64(batch->target, (char *)field->out_value, address, data);
  78         riscv_fill_dmi_nop_u64(batch->target, (char *)field->in_value);
  79         batch->last_scan = RISCV_SCAN_TYPE_WRITE;
  80         batch->used_scans++;
  81 }
  82
  83 size_t riscv_batch_add_dmi_read(struct riscv_batch *batch, unsigned address)
  84 {
  85         assert(batch->used_scans < batch->allocated_scans);
  86         struct scan_field *field = batch->fields + batch->used_scans;
  87         field->num_bits = riscv_dmi_write_u64_bits(batch->target);
  88         field->out_value = (void *)(batch->data_out + batch->used_scans * sizeof(uint64_t));
  89         field->in_value  = (void *)(batch->data_in  + batch->used_scans * sizeof(uint64_t));
  90         riscv_fill_dmi_read_u64(batch->target, (char *)field->out_value, address);
  91         riscv_fill_dmi_nop_u64(batch->target, (char *)field->in_value);
  92         batch->last_scan = RISCV_SCAN_TYPE_READ;
  93         batch->used_scans++;
  94
  95         /* FIXME We get the read response back on the next scan.  For now I'm
  96          * just sticking a NOP in there, but this should be coalesced away. */
  97         riscv_batch_add_nop(batch);
  98
  99         batch->read_keys[batch->read_keys_used] = batch->used_scans - 1;
 100         return batch->read_keys_used++;
 101 }
 102
 103 uint64_t riscv_batch_get_dmi_read(struct riscv_batch *batch, size_t key)
 104 {
 105         assert(key < batch->read_keys_used);
 106         size_t index = batch->read_keys[key];
 107         assert(index <= batch->used_scans);
 108         uint8_t *base = batch->data_in + 8 * index;
 109         return base[0] |
 110                 ((uint64_t) base[1]) << 8 |
 111                 ((uint64_t) base[2]) << 16 |
 112                 ((uint64_t) base[3]) << 24 |
 113                 ((uint64_t) base[4]) << 32 |
 114                 ((uint64_t) base[5]) << 40 |
 115                 ((uint64_t) base[6]) << 48 |
 116                 ((uint64_t) base[7]) << 56;
 117 }
 118
 119 void riscv_batch_add_nop(struct riscv_batch *batch)
 120 {
 121         assert(batch->used_scans < batch->allocated_scans);
 122         struct scan_field *field = batch->fields + batch->used_scans;
 123         field->num_bits = riscv_dmi_write_u64_bits(batch->target);
 124         field->out_value = (void *)(batch->data_out + batch->used_scans * sizeof(uint64_t));
 125         field->in_value  = (void *)(batch->data_in  + batch->used_scans * sizeof(uint64_t));
 126         riscv_fill_dmi_nop_u64(batch->target, (char *)field->out_value);
 127         riscv_fill_dmi_nop_u64(batch->target, (char *)field->in_value);
 128         batch->last_scan = RISCV_SCAN_TYPE_NOP;
 129         batch->used_scans++;
 130 }
 131
 132 void dump_field(int idle, const struct scan_field *field)
 133 {
 134         static const char * const op_string[] = {"-", "r", "w", "?"};
 135         static const char * const status_string[] = {"+", "?", "F", "b"};
 136
 137         if (debug_level < LOG_LVL_DEBUG)
 138                 return;
 139
 140         assert(field->out_value != NULL);
 141         uint64_t out = buf_get_u64(field->out_value, 0, field->num_bits);
 142         unsigned int out_op = get_field(out, DTM_DMI_OP);
 143         unsigned int out_data = get_field(out, DTM_DMI_DATA);
 144         unsigned int out_address = out >> DTM_DMI_ADDRESS_OFFSET;
 145
 146         if (field->in_value) {
 147                 uint64_t in = buf_get_u64(field->in_value, 0, field->num_bits);
 148                 unsigned int in_op = get_field(in, DTM_DMI_OP);
 149                 unsigned int in_data = get_field(in, DTM_DMI_DATA);
 150                 unsigned int in_address = in >> DTM_DMI_ADDRESS_OFFSET;
 151
 152                 log_printf_lf(LOG_LVL_DEBUG,
 153                                 __FILE__, __LINE__, __PRETTY_FUNCTION__,
 154                                 "%db %di %s %08x @%02x -> %s %08x @%02x",
 155                                 field->num_bits, idle,
 156                                 op_string[out_op], out_data, out_address,
 157                                 status_string[in_op], in_data, in_address);
 158         } else {
 159                 log_printf_lf(LOG_LVL_DEBUG,
 160                                 __FILE__, __LINE__, __PRETTY_FUNCTION__, "%db %di %s %08x @%02x -> ?",
 161                                 field->num_bits, idle, op_string[out_op], out_data, out_address);
 162         }
 163 }