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rocket-chip/csrc/vcs_main.cc

206 lines
4.4 KiB
C++

// See LICENSE for license details.
#include "htif_emulator.h"
#include "mm.h"
#include "mm_dramsim2.h"
#include <DirectC.h>
#include <stdio.h>
#include <stdlib.h>
#include <vector>
#include <sstream>
#include <iterator>
extern "C" {
extern int vcs_main(int argc, char** argv);
static htif_emulator_t* htif;
static unsigned htif_bytes;
static unsigned mem_channels;
static mm_t** mm;
static const char* loadmem;
static bool dramsim = false;
void htif_fini(vc_handle failure)
{
delete htif;
htif = NULL;
exit(vc_getScalar(failure));
}
int main(int argc, char** argv)
{
unsigned long memsz_mb = MEM_SIZE / (1024*1024);
for (int i = 1; i < argc; i++)
{
if (!strcmp(argv[i], "+dramsim"))
dramsim = true;
else if (!strncmp(argv[i], "+loadmem=", 9))
loadmem = argv[i]+9;
}
htif = new htif_emulator_t(memsz_mb,
std::vector<std::string>(argv + 1, argv + argc));
vcs_main(argc, argv);
abort(); // should never get here
}
void memory_tick(
vc_handle channel,
vc_handle ar_valid,
vc_handle ar_ready,
vc_handle ar_addr,
vc_handle ar_id,
vc_handle ar_size,
vc_handle ar_len,
vc_handle aw_valid,
vc_handle aw_ready,
vc_handle aw_addr,
vc_handle aw_id,
vc_handle aw_size,
vc_handle aw_len,
vc_handle w_valid,
vc_handle w_ready,
vc_handle w_strb,
vc_handle w_data,
vc_handle w_last,
vc_handle r_valid,
vc_handle r_ready,
vc_handle r_resp,
vc_handle r_id,
vc_handle r_data,
vc_handle r_last,
vc_handle b_valid,
vc_handle b_ready,
vc_handle b_resp,
vc_handle b_id)
{
int c = vc_4stVectorRef(channel)->d;
assert(c < mem_channels);
mm_t* mmc = mm[c];
uint32_t write_data[mmc->get_word_size()/sizeof(uint32_t)];
for (size_t i = 0; i < mmc->get_word_size()/sizeof(uint32_t); i++)
write_data[i] = vc_4stVectorRef(w_data)[i].d;
mmc->tick
(
vc_getScalar(ar_valid),
vc_4stVectorRef(ar_addr)->d,
vc_4stVectorRef(ar_id)->d,
vc_4stVectorRef(ar_size)->d,
vc_4stVectorRef(ar_len)->d,
vc_getScalar(aw_valid),
vc_4stVectorRef(aw_addr)->d,
vc_4stVectorRef(aw_id)->d,
vc_4stVectorRef(aw_size)->d,
vc_4stVectorRef(aw_len)->d,
vc_getScalar(w_valid),
vc_4stVectorRef(w_strb)->d,
write_data,
vc_getScalar(w_last),
vc_getScalar(r_ready),
vc_getScalar(b_ready)
);
vc_putScalar(ar_ready, mmc->ar_ready());
vc_putScalar(aw_ready, mmc->aw_ready());
vc_putScalar(w_ready, mmc->w_ready());
vc_putScalar(b_valid, mmc->b_valid());
vc_putScalar(r_valid, mmc->r_valid());
vc_putScalar(r_last, mmc->r_last());
vec32 d[mmc->get_word_size()/sizeof(uint32_t)];
d[0].c = 0;
d[0].d = mmc->b_resp();
vc_put4stVector(b_resp, d);
d[0].c = 0;
d[0].d = mmc->b_id();
vc_put4stVector(b_id, d);
d[0].c = 0;
d[0].d = mmc->r_resp();
vc_put4stVector(r_resp, d);
d[0].c = 0;
d[0].d = mmc->r_id();
vc_put4stVector(r_id, d);
for (size_t i = 0; i < mmc->get_word_size()/sizeof(uint32_t); i++)
{
d[i].c = 0;
d[i].d = ((uint32_t*)mmc->r_data())[i];
}
vc_put4stVector(r_data, d);
}
void htif_init(
vc_handle n_mem_channel,
vc_handle htif_width, vc_handle mem_width)
{
mem_channels = vc_4stVectorRef(n_mem_channel)->d;
int mw = vc_4stVectorRef(mem_width)->d;
assert(mw && (mw & (mw-1)) == 0);
mm = new mm_t*[mem_channels];
for (int i=0; i<mem_channels; i++) {
mm[i] = dramsim ? (mm_t*)(new mm_dramsim2_t) : (mm_t*)(new mm_magic_t);
mm[i]->init(MEM_SIZE, mw/8, LINE_SIZE);
if (loadmem)
load_mem(mm[i]->get_data(), loadmem);
}
vec32* w = vc_4stVectorRef(htif_width);
assert(w->d <= 32 && w->d % 8 == 0); // htif_tick assumes data fits in a vec32
htif_bytes = w->d/8;
}
void htif_tick
(
vc_handle htif_in_valid,
vc_handle htif_in_ready,
vc_handle htif_in_bits,
vc_handle htif_out_valid,
vc_handle htif_out_ready,
vc_handle htif_out_bits,
vc_handle exit
)
{
static bool peek_in_valid;
static uint32_t peek_in_bits;
if (vc_getScalar(htif_in_ready))
peek_in_valid = htif->recv_nonblocking(&peek_in_bits, htif_bytes);
vc_putScalar(htif_out_ready, 1);
if (vc_getScalar(htif_out_valid))
{
vec32* bits = vc_4stVectorRef(htif_out_bits);
htif->send(&bits->d, htif_bytes);
}
vec32 bits = {0, 0};
bits.d = peek_in_bits;
vc_put4stVector(htif_in_bits, &bits);
vc_putScalar(htif_in_valid, peek_in_valid);
bits.d = htif->done() ? (htif->exit_code() << 1 | 1) : 0;
vc_put4stVector(exit, &bits);
}
}