1 files changed, 0 insertions, 227 deletions
diff --git a/src/vendorcode/google/chromeos/vbnv_flash.c b/src/vendorcode/google/chromeos/vbnv_flash.c
deleted file mode 100644
index 88f39b08f1..0000000000
--- a/src/vendorcode/google/chromeos/vbnv_flash.c
+++ /dev/null
@@ -1,227 +0,0 @@
-/*
- * This file is part of the coreboot project.
- *
- * Copyright (C) 2014 The ChromiumOS Authors.  All rights reserved.
- *
- * 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; version 2 of the License.
- *
- * 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.
- */
-
-#include <arch/early_variables.h>
-#include <assert.h>
-#include <console/console.h>
-#include <spi_flash.h>
-#include <string.h>
-#include <vb2_api.h>
-#include <vboot_nvstorage.h>
-#include "chromeos.h"
-#include "vbnv.h"
-#include "vbnv_layout.h"
-
-#define BLOB_SIZE VB2_NVDATA_SIZE
-
-struct vbnv_flash_ctx {
-	/* VBNV flash is initialized */
-	int initialized;
-
-	/* Offset of the current nvdata in SPI flash */
-	int blob_offset;
-
-	/* Offset of the topmost nvdata blob in SPI flash */
-	int top_offset;
-
-	/* SPI flash handler used when saving data */
-	struct spi_flash *flash;
-
-	/* FMAP descriptor of the NVRAM area */
-	struct region_device region;
-
-	/* Cache of the current nvdata */
-	uint8_t cache[BLOB_SIZE];
-};
-static struct vbnv_flash_ctx vbnv_flash CAR_GLOBAL;
-
-/*
- * This code assumes that flash is erased to 1-bits, and write operations can
- * only change 1-bits to 0-bits. So if the new contents only change 1-bits to
- * 0-bits, we can reuse the current blob.
- */
-static inline uint8_t erase_value(void)
-{
-	return 0xff;
-}
-
-static inline int can_overwrite(uint8_t current, uint8_t new)
-{
-	return (current & new) == new;
-}
-
-static int init_vbnv(void)
-{
-	struct vbnv_flash_ctx *ctx = car_get_var_ptr(&vbnv_flash);
-	uint8_t buf[BLOB_SIZE];
-	uint8_t empty_blob[BLOB_SIZE];
-	int offset;
-	int i;
-
-	if (vboot_named_region_device("RW_NVRAM", &ctx->region) ||
-	    region_device_sz(&ctx->region) < BLOB_SIZE) {
-		printk(BIOS_ERR, "%s: failed to locate NVRAM\n", __func__);
-		return 1;
-	}
-
-	/* Prepare an empty blob to compare against. */
-	for (i = 0; i < BLOB_SIZE; i++)
-		empty_blob[i] = erase_value();
-
-	offset = 0;
-	ctx->top_offset = region_device_sz(&ctx->region) - BLOB_SIZE;
-
-	/*
-	 * after the loop, offset is supposed to point the blob right before
-	 * the first empty blob, the last blob in the nvram if there is no
-	 * empty blob, or the base of the region if the nvram has never been
-	 * used.
-	 */
-	for (i = 0; i <= ctx->top_offset; i += BLOB_SIZE) {
-		if (rdev_readat(&ctx->region, buf, i, BLOB_SIZE) < 0) {
-			printk(BIOS_ERR, "failed to read nvdata\n");
-			return 1;
-		}
-		if (!memcmp(buf, empty_blob, BLOB_SIZE))
-			break;
-		offset = i;
-	}
-
-	/* reread the nvdata and write it to the cache */
-	if (rdev_readat(&ctx->region, ctx->cache, offset, BLOB_SIZE) < 0) {
-		printk(BIOS_ERR, "failed to read nvdata\n");
-		return 1;
-	}
-
-	ctx->blob_offset = offset;
-	ctx->initialized = 1;
-
-	return 0;
-}
-
-static void vbnv_is_erasable(void)
-{
-	/*
-	 * We check whether the region is aligned or not in advance to ensure
-	 * we can erase the region when it's all used up.
-	 *
-	 * The region offset & size are determined by fmap.dts yet the check can
-	 * be confidently done only by the spi flash driver. We use the same
-	 * check as the one used by spi_flash_cmd_erase, which happens to be
-	 * common to all the spi flash parts we support.
-	 *
-	 * TODO: Check by calling can_erase implemented by each spi flash driver
-	 */
-	struct vbnv_flash_ctx *ctx = car_get_var_ptr(&vbnv_flash);
-
-	assert(!(region_device_offset(&ctx->region) % ctx->flash->sector_size));
-	assert(!(region_device_sz(&ctx->region) % ctx->flash->sector_size));
-}
-
-static int vbnv_flash_probe(void)
-{
-	struct vbnv_flash_ctx *ctx = car_get_var_ptr(&vbnv_flash);
-
-	if (!ctx->flash) {
-		ctx->flash = spi_flash_probe(CONFIG_BOOT_MEDIA_SPI_BUS, 0);
-		if (!ctx->flash) {
-			printk(BIOS_ERR, "failed to probe spi flash\n");
-			return 1;
-		}
-		/*
-		 * Called here instead of init_vbnv to reduce impact on boot
-		 * speed.
-		 */
-		vbnv_is_erasable();
-	}
-
-	/*
-	 * Handle the case where spi_flash_probe returns a CAR_GLOBAL
-	 * in early execution on x86 but then later is moved to RAM.
-	 */
-	ctx->flash = car_get_var_ptr(ctx->flash);
-
-	return 0;
-}
-
-static int erase_nvram(void)
-{
-	struct vbnv_flash_ctx *ctx = car_get_var_ptr(&vbnv_flash);
-
-	if (vbnv_flash_probe())
-		return 1;
-
-	if (ctx->flash->erase(ctx->flash, region_device_offset(&ctx->region),
-			      region_device_sz(&ctx->region))) {
-		printk(BIOS_ERR, "failed to erase nvram\n");
-		return 1;
-	}
-
-	printk(BIOS_INFO, "nvram is cleared\n");
-	return 0;
-}
-
-void read_vbnv_flash(uint8_t *vbnv_copy)
-{
-	struct vbnv_flash_ctx *ctx = car_get_var_ptr(&vbnv_flash);
-
-	if (!ctx->initialized)
-		if (init_vbnv())
-			return;  /* error */
-
-	memcpy(vbnv_copy, ctx->cache, BLOB_SIZE);
-}
-
-void save_vbnv_flash(const uint8_t *vbnv_copy)
-{
-	struct vbnv_flash_ctx *ctx = car_get_var_ptr(&vbnv_flash);
-	int new_offset;
-	int i;
-
-	if (!ctx->initialized)
-		if (init_vbnv())
-			return;  /* error */
-
-	/* Bail out if there have been no changes. */
-	if (!memcmp(vbnv_copy, ctx->cache, BLOB_SIZE))
-		return;
-
-	new_offset = ctx->blob_offset;
-
-	/* See if we can overwrite the current blob with the new one */
-	for (i = 0; i < BLOB_SIZE; i++) {
-		if (!can_overwrite(ctx->cache[i], vbnv_copy[i])) {
-			/* unable to overwrite. need to use the next blob */
-			new_offset += BLOB_SIZE;
-			if (new_offset > ctx->top_offset) {
-				if (erase_nvram())
-					return;  /* error */
-				new_offset = 0;
-			}
-			break;
-		}
-	}
-
-	if (!vbnv_flash_probe() &&
-	    !ctx->flash->write(ctx->flash,
-			       region_device_offset(&ctx->region) + new_offset,
-			       BLOB_SIZE, vbnv_copy)) {
-		/* write was successful. safely move pointer forward */
-		ctx->blob_offset = new_offset;
-		memcpy(ctx->cache, vbnv_copy, BLOB_SIZE);
-	} else {
-		printk(BIOS_ERR, "failed to save nvdata\n");
-	}
-}