mirror of
https://github.com/Telecominfraproject/OpenCellular.git
synced 2025-11-25 18:55:24 +00:00
664096bd1a
Originally, we didn't trust the firmware to provide these functions from a standard library. Now, with coreboot, we do. BUG=chromium:611535 BRANCH=none TEST=make runtests; emerge-kevin coreboot depthcharge Change-Id: I4e624c40085f2b665275a38624340b2f6aabcf11 Signed-off-by: Randall Spangler <rspangler@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/399120 Reviewed-by: Daisuke Nojiri <dnojiri@chromium.org>
75 lines
1.7 KiB
C
75 lines
1.7 KiB
C
/* Copyright (c) 2013 The Chromium OS Authors. All rights reserved.
|
|
* Use of this source code is governed by a BSD-style license that can be
|
|
* found in the LICENSE file.
|
|
*
|
|
* Implementations of stateful memory operations.
|
|
*/
|
|
|
|
#include "sysincludes.h"
|
|
|
|
#include "stateful_util.h"
|
|
#include "utility.h"
|
|
|
|
void StatefulInit(MemcpyState *state, void *buf, uint64_t len)
|
|
{
|
|
state->remaining_buf = buf;
|
|
state->remaining_len = len;
|
|
state->overrun = 0;
|
|
}
|
|
|
|
void *StatefulSkip(MemcpyState *state, uint64_t len)
|
|
{
|
|
if (state->overrun)
|
|
return NULL;
|
|
if (len > state->remaining_len) {
|
|
state->overrun = 1;
|
|
return NULL;
|
|
}
|
|
state->remaining_buf += len;
|
|
state->remaining_len -= len;
|
|
return state; /* Must return something non-NULL. */
|
|
}
|
|
|
|
void *StatefulMemcpy(MemcpyState *state, void *dst, uint64_t len)
|
|
{
|
|
if (state->overrun)
|
|
return NULL;
|
|
if (len > state->remaining_len) {
|
|
state->overrun = 1;
|
|
return NULL;
|
|
}
|
|
memcpy(dst, state->remaining_buf, len);
|
|
state->remaining_buf += len;
|
|
state->remaining_len -= len;
|
|
return dst;
|
|
}
|
|
|
|
const void *StatefulMemcpy_r(MemcpyState *state, const void *src, uint64_t len)
|
|
{
|
|
if (state->overrun)
|
|
return NULL;
|
|
if (len > state->remaining_len) {
|
|
state->overrun = 1;
|
|
return NULL;
|
|
}
|
|
memcpy(state->remaining_buf, src, len);
|
|
state->remaining_buf += len;
|
|
state->remaining_len -= len;
|
|
return src;
|
|
}
|
|
|
|
const void *StatefulMemset_r(MemcpyState *state, const uint8_t val,
|
|
uint64_t len)
|
|
{
|
|
if (state->overrun)
|
|
return NULL;
|
|
if (len > state->remaining_len) {
|
|
state->overrun = 1;
|
|
return NULL;
|
|
}
|
|
memset(state->remaining_buf, val, len);
|
|
state->remaining_buf += len;
|
|
state->remaining_len -= len;
|
|
return state; /* Must return something non-NULL. */
|
|
}
|