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e81bf0ed
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Harald Welte
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/* AT91SAM7 USB Request Context for OpenPCD / OpenPICC
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* (C) 2006 by Harald Welte <hwelte@hmw-consulting.de>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <stdint.h>
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#include <stdlib.h>
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#include <board.h>
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#define __INLINE inline
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#define IRQn_Type int
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#include <cmsis/core_cm3.h>
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#include "req_ctx.h"
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bf8d8292
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Christian Daniel
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#define local_irq_save(x) do { __disable_fault_irq(); __disable_irq(); } while(0)
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#define local_irq_restore(x) do { __enable_fault_irq(); __enable_irq(); } while(0)
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e81bf0ed
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Harald Welte
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bf8d8292
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Christian Daniel
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#define NUM_RCTX_SMALL 20
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#define NUM_RCTX_LARGE 0
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e81bf0ed
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Harald Welte
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#define NUM_REQ_CTX (NUM_RCTX_SMALL+NUM_RCTX_LARGE)
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static uint8_t rctx_data[NUM_RCTX_SMALL][RCTX_SIZE_SMALL];
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static uint8_t rctx_data_large[NUM_RCTX_LARGE][RCTX_SIZE_LARGE];
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static struct req_ctx req_ctx[NUM_REQ_CTX];
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struct req_ctx __ramfunc *req_ctx_find_get(int large,
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unsigned long old_state,
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unsigned long new_state)
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{
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unsigned long flags;
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uint8_t i;
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if (large)
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i = NUM_RCTX_SMALL;
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else
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i = 0;
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for (; i < NUM_REQ_CTX; i++) {
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local_irq_save(flags);
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if (req_ctx[i].state == old_state) {
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req_ctx[i].state = new_state;
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local_irq_restore(flags);
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return &req_ctx[i];
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}
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local_irq_restore(flags);
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}
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return NULL;
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}
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uint8_t req_ctx_num(struct req_ctx *ctx)
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{
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return ((char *)ctx - (char *)&req_ctx[0])/sizeof(*ctx);
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}
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void req_ctx_set_state(struct req_ctx *ctx, unsigned long new_state)
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{
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unsigned long flags;
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/* FIXME: do we need this kind of locking, we're UP! */
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local_irq_save(flags);
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ctx->state = new_state;
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local_irq_restore(flags);
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}
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void req_ctx_put(struct req_ctx *ctx)
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{
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req_ctx_set_state(ctx, RCTX_STATE_FREE);
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}
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void req_ctx_init(void)
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{
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int i;
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for (i = 0; i < NUM_RCTX_SMALL; i++) {
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req_ctx[i].size = RCTX_SIZE_SMALL;
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req_ctx[i].data = rctx_data[i];
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req_ctx[i].state = RCTX_STATE_FREE;
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}
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for (i = 0; i < NUM_RCTX_LARGE; i++) {
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req_ctx[NUM_RCTX_SMALL+i].size = RCTX_SIZE_LARGE;
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req_ctx[NUM_RCTX_SMALL+i].data = rctx_data_large[i];
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bf8d8292
|
Christian Daniel
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req_ctx[NUM_RCTX_SMALL+i].state = RCTX_STATE_FREE;
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e81bf0ed
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Harald Welte
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}
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}
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struct req_ctx *req_ctx_dequeue(struct llist_head *list)
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{
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unsigned long flags;
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struct req_ctx *rctx;
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local_irq_save(flags);
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if (llist_empty(list)) {
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local_irq_restore(flags);
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return NULL;
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}
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rctx = llist_entry(list->next, struct req_ctx, list);
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llist_del(&rctx->list);
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local_irq_restore(flags);
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return rctx;
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}
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void req_ctx_enqueue(struct llist_head *list, struct req_ctx *rctx)
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{
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unsigned long flags;
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/* FIXME: do we need this kind of locking, we're UP! */
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local_irq_save(flags);
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llist_add_tail(&rctx->list, list);
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local_irq_restore(flags);
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}
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133 |
b93708ed
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Christian Daniel
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void req_ctx_dump()
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{
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int i;
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local_irq_save(flags);
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printf("ctx status: ");
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for(i = 0; i < NUM_REQ_CTX; i++)
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printf(" %02x", req_ctx[i].state);
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local_irq_restore(flags);
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printf("\n\r");
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}
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