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-rw-r--r--firmware/microblaze/lib/bsm12.c319
1 files changed, 0 insertions, 319 deletions
diff --git a/firmware/microblaze/lib/bsm12.c b/firmware/microblaze/lib/bsm12.c
deleted file mode 100644
index 3f17fe42d..000000000
--- a/firmware/microblaze/lib/bsm12.c
+++ /dev/null
@@ -1,319 +0,0 @@
-/* -*- c++ -*- */
-/*
- * Copyright 2009 Free Software Foundation, Inc.
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-
-/*
- * buffer state machine: 1 input to two outputs
- *
- * Typically used to read packets from the ethernet and then after inspecting,
- * handle the packet in firmware or pass it on to 1 of the 2 buffer destinations.
- */
-
-#ifdef HAVE_CONFIG_H
-#include <config.h>
-#endif
-
-#include "bsm12.h"
-#include "memory_map.h"
-#include "buffer_pool.h"
-#include <stdbool.h>
-#include "nonstdio.h"
-#include <stdlib.h>
-
-typedef enum {
- BS_EMPTY,
- BS_FILLING,
- BS_FULL,
- BS_EMPTYING,
-} buffer_state_t;
-
-static buffer_state_t buffer_state[NBUFFERS];
-static uint32_t last_send_ctrl[NBUFFERS];
-static int8_t buffer_target[NBUFFERS]; // -1, 0 or 1.
-static uint8_t buffer_dst[NBUFFERS]; // 0 or 1. Valid only when BF_EMPTYING
-
-#define ST_IDLE (-1)
-
-void
-bsm12_init(bsm12_t *sm, int buf0,
- const buf_cmd_args_t *recv,
- const buf_cmd_args_t *send0,
- const buf_cmd_args_t *send1,
- bsm12_inspector_t inspect)
-{
- if (buf0 & 0x3) // precondition: buf0 % 4 == 0
- abort();
-
- sm->buf0 = buf0;
- sm->running = false;
- sm->recv_args = *recv;
- sm->send_args[0] = *send0;
- sm->send_args[1] = *send1;
-
- sm->rx_state = ST_IDLE;
- sm->tx_state[0] = ST_IDLE;
- sm->tx_state[1] = ST_IDLE;
-
- sm->inspect = inspect;
-
- sm->bps_error = BPS_ERROR(buf0 + 0) | BPS_ERROR(buf0 + 1) | BPS_ERROR(buf0 + 2);
- sm->bps_done = BPS_DONE(buf0 + 0) | BPS_DONE(buf0 + 1) | BPS_DONE(buf0 + 2);
- sm->bps_error_or_done = sm->bps_error | sm->bps_done;
-
- // How much to adjust the last_line register.
- // It's 1 for everything but the ethernet.
- sm->last_line_adj = recv->port == PORT_ETH ? 3 : 1;
-
- buffer_state[sm->buf0 + 0] = BS_EMPTY;
- buffer_state[sm->buf0 + 1] = BS_EMPTY;
- buffer_state[sm->buf0 + 2] = BS_EMPTY;
-
- buffer_target[sm->buf0 + 0] = -1;
- buffer_target[sm->buf0 + 1] = -1;
- buffer_target[sm->buf0 + 2] = -1;
-
- for (int i = 0; i < NBUFFERS; i++)
- sm->next_buf[i] = buf0;
-
- sm->next_buf[buf0 + 0] = buf0 + 1;
- sm->next_buf[buf0 + 1] = buf0 + 2;
- sm->next_buf[buf0 + 2] = buf0 + 0;
-
- for (int i = 0; i < 3; i++){
- sm->precomputed_receive_to_buf_ctrl_word[i] =
- (BPC_READ
- | BPC_BUFFER(sm->buf0 + i)
- | BPC_PORT(sm->recv_args.port)
- | BPC_STEP(1)
- | BPC_FIRST_LINE(sm->recv_args.first_line)
- | BPC_LAST_LINE(sm->recv_args.last_line));
-
- for (int j = 0; j < 2; j++){
- sm->precomputed_send_from_buf_ctrl_word[i][j] =
- (BPC_WRITE
- | BPC_BUFFER(sm->buf0 + i)
- | BPC_PORT(sm->send_args[j].port)
- | BPC_STEP(1)
- | BPC_FIRST_LINE(sm->send_args[j].first_line)
- | BPC_LAST_LINE(0)); // last line filled in at runtime
- }
- }
-}
-
-static inline void
-bsm12_receive_to_buf(bsm12_t *sm, int bufno)
-{
- buffer_pool_ctrl->ctrl = sm->precomputed_receive_to_buf_ctrl_word[bufno & 0x3];
-}
-
-static inline void
-bsm12_send_from_buf(bsm12_t *sm, int bufno, int dst_idx)
-{
- dst_idx &= 0x1;
-
- uint32_t t =
- (sm->precomputed_send_from_buf_ctrl_word[bufno & 0x3][dst_idx]
- | BPC_LAST_LINE(buffer_pool_status->last_line[bufno] - sm->last_line_adj));
-
- buffer_pool_ctrl->ctrl = t;
- last_send_ctrl[bufno] = t;
- buffer_dst[bufno] = dst_idx;
-}
-
-static inline void
-bsm12_resend_from_buf(bsm12_t *sm, int bufno)
-{
- buffer_pool_ctrl->ctrl = last_send_ctrl[bufno];
-}
-
-void
-bsm12_start(bsm12_t *sm)
-{
- sm->running = true;
-
- buffer_state[sm->buf0 + 0] = BS_EMPTY;
- buffer_state[sm->buf0 + 1] = BS_EMPTY;
- buffer_state[sm->buf0 + 2] = BS_EMPTY;
-
- buffer_target[sm->buf0 + 0] = -1;
- buffer_target[sm->buf0 + 1] = -1;
- buffer_target[sm->buf0 + 2] = -1;
-
- bp_clear_buf(sm->buf0 + 0);
- bp_clear_buf(sm->buf0 + 1);
- bp_clear_buf(sm->buf0 + 2);
-
- sm->rx_state = 0;
- sm->tx_state[0] = ST_IDLE;
- sm->tx_state[1] = ST_IDLE;
- bsm12_receive_to_buf(sm, sm->buf0);
- buffer_state[sm->buf0] = BS_FILLING;
-}
-
-void
-bsm12_stop(bsm12_t *sm)
-{
- sm->running = false;
- bp_clear_buf(sm->buf0 + 0);
- bp_clear_buf(sm->buf0 + 1);
- bp_clear_buf(sm->buf0 + 2);
- buffer_state[sm->buf0 + 0] = BS_EMPTY;
- buffer_state[sm->buf0 + 1] = BS_EMPTY;
- buffer_state[sm->buf0 + 2] = BS_EMPTY;
-}
-
-static void bsm12_process_helper(bsm12_t *sm, int buf_this);
-static void bsm12_error_helper(bsm12_t *sm, int buf_this);
-
-void
-bsm12_process_status(bsm12_t *sm, uint32_t status)
-{
- // anything for us?
- if ((status & sm->bps_error_or_done) == 0 || !sm->running)
- return;
-
- if (status & sm->bps_error){
- // Most likely an ethernet Rx error. We just restart the transfer.
- if (status & (BPS_ERROR(sm->buf0 + 0)))
- bsm12_error_helper(sm, sm->buf0 + 0);
-
- if (status & (BPS_ERROR(sm->buf0 + 1)))
- bsm12_error_helper(sm, sm->buf0 + 1);
-
- if (status & (BPS_ERROR(sm->buf0 + 2)))
- bsm12_error_helper(sm, sm->buf0 + 2);
- }
-
- if (status & BPS_DONE(sm->buf0 + 0))
- bsm12_process_helper(sm, sm->buf0 + 0);
-
- if (status & BPS_DONE(sm->buf0 + 1))
- bsm12_process_helper(sm, sm->buf0 + 1);
-
- if (status & BPS_DONE(sm->buf0 + 2))
- bsm12_process_helper(sm, sm->buf0 + 2);
-}
-
- static void
-bsm12_process_helper(bsm12_t *sm, int buf_this)
-{
- bp_clear_buf(buf_this);
-
- if (buffer_state[buf_this] == BS_FILLING){
-
- buffer_state[buf_this] = BS_FULL;
- buffer_target[buf_this] = -1;
-
- //
- // where does this packet go?
- //
- int dst = sm->inspect(sm, buf_this);
- if (dst == -1){
- //
- // f/w handled the packet; refill the buffer
- //
- bsm12_receive_to_buf(sm, buf_this);
- buffer_state[buf_this] = BS_FILLING;
- buffer_target[buf_this] = -1;
- sm->rx_state = buf_this & 0x3;
- }
- else { // goes to dst 0 or 1
- //
- // If the next buffer is empty, start a receive on it
- //
- int t = sm->next_buf[buf_this];
- if (buffer_state[t] == BS_EMPTY){
- bsm12_receive_to_buf(sm, t);
- buffer_state[t] = BS_FILLING;
- buffer_target[t] = -1;
- sm->rx_state = t & 0x3;
- }
- else
- sm->rx_state = ST_IDLE;
-
- //
- // If the destination is idle, start the xfer, othewise remember it
- //
- if (sm->tx_state[dst] == ST_IDLE){
- bsm12_send_from_buf(sm, buf_this, dst);
- sm->tx_state[dst] = buf_this & 0x3;
- buffer_state[buf_this] = BS_EMPTYING;
- buffer_target[buf_this] = -1;
- }
- else {
- buffer_target[buf_this] = dst;
- }
- }
- }
-
- else { // BS_EMPTYING
-
- buffer_state[buf_this] = BS_EMPTY;
- buffer_target[buf_this] = -1;
-
- if (sm->rx_state == ST_IDLE){ // fire off another receive
- sm->rx_state = buf_this & 0x3;
- bsm12_receive_to_buf(sm, buf_this);
- buffer_state[buf_this] = BS_FILLING;
- buffer_target[buf_this] = -1;
- }
-
- int dst = buffer_dst[buf_this]; // the dst we were emptying into
- // is the next buffer full and for us?
- int t = sm->next_buf[buf_this];
- if (buffer_target[t] == dst){ // yes,
- bsm12_send_from_buf(sm, t, dst); // send it
- buffer_state[t] = BS_EMPTYING;
- buffer_target[t] = -1;
- sm->tx_state[dst] = t & 0x3;
- }
- // how about the one after that?
- else if (buffer_target[t=sm->next_buf[t]] == dst){ // yes,
- bsm12_send_from_buf(sm, t, dst); // send it
- buffer_state[t] = BS_EMPTYING;
- buffer_target[t] = -1;
- sm->tx_state[dst] = t & 0x3;
- }
- else {
- sm->tx_state[dst] = ST_IDLE;
- }
- }
-}
-
-static void
-bsm12_error_helper(bsm12_t *sm, int buf_this)
-{
- bp_clear_buf(buf_this); // clears ERROR flag
-
- if (buffer_state[buf_this] == BS_FILLING){
- bsm12_receive_to_buf(sm, buf_this); // restart the xfer
- }
- else { // buffer was emptying
- bsm12_resend_from_buf(sm, buf_this); // restart the xfer
- }
-}
-
-
-void
-bsm12_handle_tx_underrun(bsm12_t *sm)
-{
-}
-
-void
-bsm12_handle_rx_overrun(bsm12_t *sm)
-{
-}
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