diff options
Diffstat (limited to 'src/drivers/vpd/vpd_cbmem.c')
| -rw-r--r-- | src/drivers/vpd/vpd_cbmem.c | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/src/drivers/vpd/vpd_cbmem.c b/src/drivers/vpd/vpd_cbmem.c new file mode 100644 index 0000000000..5b685069aa --- /dev/null +++ b/src/drivers/vpd/vpd_cbmem.c @@ -0,0 +1,86 @@ +/* + * Copyright (c) 2014 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. + */ + +#include <console/console.h> +#include <cbmem.h> +#include <fmap.h> +#include <stdlib.h> +#include <string.h> +#include <timestamp.h> + +#include "vpd_tables.h" +#include "vpd.h" + +/* Currently we only support Google VPD 2.0, which has a fixed offset. */ +enum { + CROSVPD_CBMEM_MAGIC = 0x43524f53, + CROSVPD_CBMEM_VERSION = 0x0001, +}; + +struct vpd_cbmem { + uint32_t magic; + uint32_t version; + uint32_t ro_size; + uint32_t rw_size; + uint8_t blob[0]; + /* The blob contains both RO and RW data. It starts with RO (0 .. + * ro_size) and then RW (ro_size .. ro_size+rw_size). + */ +}; + +static void cbmem_add_cros_vpd(int is_recovery) +{ + struct vpd_cbmem *cbmem; + const struct vpd_blob *blob; + + timestamp_add_now(TS_START_COPYVPD); + + blob = vpd_load_blob(); + + /* Return if no VPD at all */ + if (blob->ro_size == 0 && blob->rw_size == 0) + return; + + cbmem = cbmem_add(CBMEM_ID_VPD, sizeof(*cbmem) + blob->ro_size + + blob->rw_size); + if (!cbmem) { + printk(BIOS_ERR, "%s: Failed to allocate CBMEM (%u+%u).\n", + __func__, blob->ro_size, blob->rw_size); + return; + } + + cbmem->magic = CROSVPD_CBMEM_MAGIC; + cbmem->version = CROSVPD_CBMEM_VERSION; + cbmem->ro_size = blob->ro_size; + cbmem->rw_size = blob->rw_size; + + if (blob->ro_size) { + memcpy(cbmem->blob, blob->ro_base, blob->ro_size); + timestamp_add_now(TS_END_COPYVPD_RO); + } + + if (blob->rw_size) { + memcpy(cbmem->blob + blob->ro_size, blob->rw_base, + blob->rw_size); + timestamp_add_now(TS_END_COPYVPD_RW); + } +} + +void vpd_get_buffers(struct vpd_blob *blob) +{ + const struct vpd_cbmem *vpd; + + vpd = cbmem_find(CBMEM_ID_VPD); + if (!vpd || !vpd->ro_size) + return; + + blob->ro_base = (void *)vpd->blob; + blob->ro_size = vpd->ro_size; + blob->rw_base = (void *)vpd->blob + vpd->ro_size; + blob->rw_size = vpd->rw_size; +} + +RAMSTAGE_CBMEM_INIT_HOOK(cbmem_add_cros_vpd) |