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* Copyright (c) 2010 Broadcom Corporation
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
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* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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#include <linux/slab.h>
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#include <linux/string.h>
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#include <bcmendian.h>
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typedef struct _vars {
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int bufsz; /* allocated size */
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int size; /* actual vars size */
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#define VARS_T_OH sizeof(vars_t)
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static char *findvar(char *vars, char *lim, const char *name);
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/* copy flash to ram */
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static void get_flash_nvram(si_t *sih, struct nvram_header *nvh)
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nvs = R_REG(osh, &nvh->len) - sizeof(struct nvram_header);
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bufsz = nvs + VARS_T_OH;
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new = kmalloc(bufsz, GFP_ATOMIC);
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NVR_MSG(("Out of memory for flash vars\n"));
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new->vars = (char *)new + VARS_T_OH;
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bcopy((char *)(&nvh[1]), new->vars, nvs);
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NVR_MSG(("%s: flash nvram @ %p, copied %d bytes to %p\n", __func__,
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nvh, nvs, new->vars));
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int nvram_init(void *si)
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/* Make sure we read nvram in flash just once before freeing the memory */
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NVR_MSG(("nvram_init: called again without calling nvram_exit()\n"));
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int nvram_append(void *si, char *varlst, uint varsz)
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uint bufsz = VARS_T_OH;
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new = kmalloc(bufsz, GFP_ATOMIC);
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void nvram_exit(void *si)
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static char *findvar(char *vars, char *lim, const char *name)
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for (s = vars; (s < lim) && *s;) {
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if ((memcmp(s, name, len) == 0) && (s[len] == '='))
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char *nvram_get(const char *name)
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for (cur = vars; cur; cur = cur->next) {
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v = findvar(cur->vars, cur->vars + cur->size, name);
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int nvram_set(const char *name, const char *value)
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int nvram_unset(const char *name)
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int nvram_reset(void *si)
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int nvram_commit(void)
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int nvram_getall(char *buf, int count)
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int len, resid = count;
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char *from, *lim, *to;
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lim = (char *)(this->vars + this->size);
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while ((from < lim) && (*from)) {
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len = strlen(from) + 1;
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if (resid < (acc + len))
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return BCME_BUFTOOSHORT;
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bcopy(from, to, len);
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return BCME_BUFTOOSHORT;