57 lines
1.5 KiB
C
57 lines
1.5 KiB
C
#include <stddef.h>
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#include <stdint.h>
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#include "spinlock/spinlock.h"
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#include "errors.h"
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#include "dlmalloc/malloc.h"
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#include "ramsd.h"
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#include "storedev.h"
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#include "hal/hal.h"
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#include "util/util.h"
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#include "kprintf.h"
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#include "std/string.h"
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int32_t ramsd_init(struct StoreDev *sd, void *extra) {
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RamSdInitExtra *e = extra;
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sd->sd.ramsd.capacity = e->capacity;
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if (e->preallocbuffer != NULL) {
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sd->sd.ramsd.buffer = e->preallocbuffer;
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} else {
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sd->sd.ramsd.buffer = dlmalloc(sd->sd.ramsd.capacity);
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if (sd->sd.ramsd.buffer == NULL) {
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return E_NOMEMORY;
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}
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}
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return E_OK;
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}
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int32_t ramsd_read(struct StoreDev *sd, uint8_t *const buffer, ptrdiff_t sector, ptrdiff_t off, size_t size) {
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RamSd *ramsd = &sd->sd.ramsd;
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spinlock_acquire(&sd->spinlock);
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memcpy(buffer, ramsd->buffer + (sector * sd->sectorsize + off), size);
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spinlock_release(&sd->spinlock);
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return E_OK;
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}
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int32_t ramsd_write(struct StoreDev *sd, const uint8_t *const buffer, ptrdiff_t sector, ptrdiff_t off, size_t size) {
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RamSd *ramsd = &sd->sd.ramsd;
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spinlock_acquire(&sd->spinlock);
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memcpy(ramsd->buffer + (sector * sd->sectorsize + off), buffer, size);
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spinlock_release(&sd->spinlock);
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return E_OK;
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}
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int32_t ramsd_cleanup(struct StoreDev *sd) {
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spinlock_acquire(&sd->spinlock);
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dlfree(sd->sd.ramsd.buffer);
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spinlock_release(&sd->spinlock);
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return E_OK;
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}
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size_t ramsd_capacity(struct StoreDev *sd) {
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size_t capacity;
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spinlock_acquire(&sd->spinlock);
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capacity = sd->sd.ramsd.capacity;
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spinlock_release(&sd->spinlock);
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return capacity;
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}
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