diff options
author | David Hendricks <dhendricks@fb.com> | 2018-03-09 13:58:27 -0800 |
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committer | Patrick Georgi <pgeorgi@google.com> | 2018-04-06 06:48:11 +0000 |
commit | 2004b93aed993aa02bbc588b8d82c22418ac52ec (patch) | |
tree | cdd5e95a154e2e0139474288262835a7f5847665 /src/vendorcode/cavium/bdk/libbdk-driver | |
parent | 71cbd71eb5c0e8e13b25b5d5dd2f495e7d2967eb (diff) | |
download | coreboot-2004b93aed993aa02bbc588b8d82c22418ac52ec.tar.xz |
soc/cavium: import raw BDK sources
This imports common BDK sources that will be used in subsequent
patches.
The BDK is licensed under BSD and will be reduced in size and optimized to
compile under coreboot.
Change-Id: Icb32ee670d9fa9e5c10f9abb298cebf616fa67ad
Signed-off-by: David Hendricks <dhendricks@fb.com>
Reviewed-on: https://review.coreboot.org/25524
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: David Hendricks <david.hendricks@gmail.com>
Diffstat (limited to 'src/vendorcode/cavium/bdk/libbdk-driver')
-rw-r--r-- | src/vendorcode/cavium/bdk/libbdk-driver/bdk-driver-rnm.c | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/src/vendorcode/cavium/bdk/libbdk-driver/bdk-driver-rnm.c b/src/vendorcode/cavium/bdk/libbdk-driver/bdk-driver-rnm.c new file mode 100644 index 0000000000..8394ad8c5e --- /dev/null +++ b/src/vendorcode/cavium/bdk/libbdk-driver/bdk-driver-rnm.c @@ -0,0 +1,124 @@ +/***********************license start*********************************** +* Copyright (c) 2003-2017 Cavium Inc. (support@cavium.com). All rights +* reserved. +* +* +* Redistribution and use in source and binary forms, with or without +* modification, are permitted provided that the following conditions are +* met: +* +* * Redistributions of source code must retain the above copyright +* notice, this list of conditions and the following disclaimer. +* +* * Redistributions in binary form must reproduce the above +* copyright notice, this list of conditions and the following +* disclaimer in the documentation and/or other materials provided +* with the distribution. +* +* * Neither the name of Cavium Inc. nor the names of +* its contributors may be used to endorse or promote products +* derived from this software without specific prior written +* permission. +* +* This Software, including technical data, may be subject to U.S. export +* control laws, including the U.S. Export Administration Act and its +* associated regulations, and may be subject to export or import +* regulations in other countries. +* +* TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SOFTWARE IS PROVIDED "AS IS" +* AND WITH ALL FAULTS AND CAVIUM INC. MAKES NO PROMISES, REPRESENTATIONS OR +* WARRANTIES, EITHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, WITH RESPECT +* TO THE SOFTWARE, INCLUDING ITS CONDITION, ITS CONFORMITY TO ANY +* REPRESENTATION OR DESCRIPTION, OR THE EXISTENCE OF ANY LATENT OR PATENT +* DEFECTS, AND CAVIUM SPECIFICALLY DISCLAIMS ALL IMPLIED (IF ANY) WARRANTIES +* OF TITLE, MERCHANTABILITY, NONINFRINGEMENT, FITNESS FOR A PARTICULAR +* PURPOSE, LACK OF VIRUSES, ACCURACY OR COMPLETENESS, QUIET ENJOYMENT, +* QUIET POSSESSION OR CORRESPONDENCE TO DESCRIPTION. THE ENTIRE RISK +* ARISING OUT OF USE OR PERFORMANCE OF THE SOFTWARE LIES WITH YOU. +***********************license end**************************************/ +#include <bdk.h> +#include "libbdk-arch/bdk-csrs-pccpf.h" +#include "libbdk-arch/bdk-csrs-rnm.h" + +BDK_REQUIRE_DEFINE(RNM); + +/** + * Reads 8 bits of random data from Random number generator + * + * @return random data + */ +uint8_t bdk_rng_get_random8(void) +{ + + return bdk_read64_uint8(bdk_numa_get_address(bdk_numa_local(), BDK_RNM_RANDOM)); +} + +/** + * Reads 16 bits of random data from Random number generator + * + * @return random data + */ +uint16_t bdk_rng_get_random16(void) +{ + return bdk_read64_uint16(bdk_numa_get_address(bdk_numa_local(), BDK_RNM_RANDOM)); +} + +/** + * Reads 32 bits of random data from Random number generator + * + * @return random data + */ +uint32_t bdk_rng_get_random32(void) +{ + return bdk_read64_uint32(bdk_numa_get_address(bdk_numa_local(), BDK_RNM_RANDOM)); +} + +/** + * Reads 64 bits of random data from Random number generator + * + * @return random data + */ +uint64_t bdk_rng_get_random64(void) +{ + return bdk_read64_uint64(bdk_numa_get_address(bdk_numa_local(), BDK_RNM_RANDOM)); +} + +/** + * The RNM probe function + * + * @param device RNM to probe + * + * @return Zero on success, negative on failure + */ +static int probe(bdk_device_t *device) +{ + bdk_device_rename(device, "N%d.RNM%d", device->node, device->instance); + return 0; +} + +/** + * RNM init() function + * + * @param device RNM to initialize + * + * @return Zero on success, negative on failure + */ +static int init(bdk_device_t *device) +{ + BDK_BAR_MODIFY(c, device, BDK_RNM_CTL_STATUS, + c.s.ent_en = 1; + c.s.rng_en = 1); + /* Read back after enable so we know it is done. Needed on t88 pass 2.0 emulator */ + BDK_BAR_READ(device, BDK_RNM_CTL_STATUS); + /* Errata (RNM-22528) First consecutive reads to RNM_RANDOM return same + value. Before using the random entropy, read RNM_RANDOM at least once + and discard the data */ + bdk_rng_get_random64(); + return 0; +} + +bdk_driver_t __bdk_driver_rnm = { + .id = (BDK_PCC_PROD_E_GEN << 24) | BDK_PCC_VENDOR_E_CAVIUM | (BDK_PCC_DEV_IDL_E_RNM << 16), + .probe = probe, + .init = init, +}; |