libstb: remove stb.c and obsolete companions

This removes all the files that were replaced by secureboot.c,
trustedboot.c and cvc.c.

Signed-off-by: Claudio Carvalho <cclaudio@linux.vnet.ibm.com>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>

5 files changed, 1 insertions, 263 deletions

diff --git a/libstb/drivers/Makefile.inc b/libstb/drivers/Makefile.inc
index 9eaa257b..3b8ed0f8 100644
--- a/libstb/drivers/Makefile.inc
+++ b/libstb/drivers/Makefile.inc
@@ -4,7 +4,7 @@ DRIVERS_DIR = libstb/drivers
 
 SUBDIRS += $(DRIVERS_DIR)
 
-DRIVERS_SRCS = romcode.c tpm_i2c_interface.c tpm_i2c_nuvoton.c sw_driver.c
+DRIVERS_SRCS = tpm_i2c_interface.c tpm_i2c_nuvoton.c
 DRIVERS_OBJS = $(DRIVERS_SRCS:%.c=%.o)
 DRIVERS = $(DRIVERS_DIR)/built-in.o
 
diff --git a/libstb/drivers/romcode.c b/libstb/drivers/romcode.c
deleted file mode 100644
index ab5f1aab..00000000
--- a/libstb/drivers/romcode.c
+++ /dev/null
@@ -1,138 +0,0 @@
-/* Copyright 2013-2016 IBM Corp.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * 	http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
- * implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <chip.h>
-#include <xscom.h>
-#include <string.h>
-#include <skiboot.h>
-#include "../status_codes.h"
-#include "../rom.h"
-#include "romcode.h"
-
-#define DRIVER_NAME	"romcode"
-
-#define ROMCODE_MEMORY_SIZE	(16 * 1024)
-#define ROMCODE_XSCOM_ADDRESS	0x02020017
-
-/*
- *  From the source code of the ROM code
- */
-#define ROMCODE_SHA512_OFFSET		0x20
-#define ROMCODE_VERIFY_OFFSET		0x30
-
-static const char *compat = "ibm,secureboot-v1";
-static void *romcode_base_addr = NULL;
-static sha2_hash_t *hw_key_hash = NULL;
-
-/*
- * Assembly interfaces to call into ROM code.
- * func_ptr is the ROM code function address, followed
- * by additional parameters as necessary
- */
-ROM_response __cvc_verify_v1(void *func_ptr, ROM_container_raw *container,
-			     ROM_hw_params *params);
-void __cvc_sha512_v1(void *func_ptr, const uint8_t *data, size_t len,
-		     uint8_t *digest);
-
-static int romcode_verify(void *container)
-{
-	ROM_hw_params hw_params;
-	ROM_response rc;
-
-	memset(&hw_params, 0, sizeof(ROM_hw_params));
-	memcpy(&hw_params.hw_key_hash, hw_key_hash, sizeof(sha2_hash_t));
-	rc = __cvc_verify_v1(romcode_base_addr + ROMCODE_VERIFY_OFFSET,
-			     (ROM_container_raw*) container, &hw_params);
-	if (rc != ROM_DONE) {
-		/*
-		 * Verify failed. hw_params.log indicates what checking has
-		 * failed. This will abort the boot process.
-		 */
-		prlog(PR_ERR, "ROM: %s failed (rc=%d, hw_params.log=0x%llx)\n",
-		      __func__, rc, be64_to_cpu(hw_params.log));
-		return STB_VERIFY_FAILED;
-	}
-	return 0;
-}
-
-static void romcode_sha512(const uint8_t *data, size_t len, uint8_t *digest)
-{
-	memset(digest, 0, sizeof(sha2_hash_t));
-	__cvc_sha512_v1(romcode_base_addr + ROMCODE_SHA512_OFFSET,
-			data, len, digest);
-}
-
-static void romcode_cleanup(void) {
-	if (romcode_base_addr)
-		free(romcode_base_addr);
-	hw_key_hash = NULL;
-}
-
-static struct rom_driver_ops romcode_driver = {
-	.name    = DRIVER_NAME,
-	.verify  = romcode_verify,
-	.sha512  = romcode_sha512,
-	.cleanup = romcode_cleanup
-};
-
-void romcode_probe(const struct dt_node *node)
-{
-	/* This xscom register has the ROM code base address */
-	const uint32_t reg_addr = ROMCODE_XSCOM_ADDRESS;
-	uint64_t reg_data;
-	struct proc_chip *chip;
-	const char* hash_algo;
-
-	if (!dt_node_is_compatible(node, compat)) {
-		prlog(PR_DEBUG, "ROM: %s node is not compatible\n",
-		      node->name);
-		return;
-	}
-	/*
-	 * secureboot-v1 defines containers with sha512 hashes
-	 */
-	hash_algo = dt_prop_get(node, "hash-algo");
-	if (strcmp(hash_algo, "sha512")) {
-		/**
-		 * @fwts-label ROMHashAlgorithmInvalid
-		 * @fwts-advice Hostboot creates the ibm,secureboot node and
-		 * the hash-algo property. Check that the ibm,secureboot node
-		 * layout has not changed.
-		 */
-		prlog(PR_ERR, "ROM: hash-algo=%s not expected\n", hash_algo);
-		return;
-	}
-	hw_key_hash = (sha2_hash_t*) dt_prop_get(node, "hw-key-hash");
-	romcode_base_addr = malloc(ROMCODE_MEMORY_SIZE);
-	assert(romcode_base_addr);
-	/*
-	 * The logic that contains the ROM within the processor is implemented
-	 * in a way that it only responds to CI (cache inhibited) operations.
-	 * Due to performance issues we copy the verification code from the
-	 * secure ROM to RAM and we use memcpy_from_ci to do that.
-	 */
-	chip = next_chip(NULL);
-	xscom_read(chip->id, reg_addr, &reg_data);
-	memcpy_from_ci(romcode_base_addr, (void*) reg_data,
-		       ROMCODE_MEMORY_SIZE);
-	/*
-	 * Skiboot runs with IR (Instruction Relocation) &
-	 * DR (Data Relocation) off, so there is no need to either MMIO
-	 * the ROM code or set the memory region as executable.
-         * skiboot accesses the physical memory directly. Real mode.
-	 */
-	rom_set_driver(&romcode_driver);
-}
diff --git a/libstb/drivers/romcode.h b/libstb/drivers/romcode.h
deleted file mode 100644
index 4152eaee..00000000
--- a/libstb/drivers/romcode.h
+++ /dev/null
@@ -1,24 +0,0 @@
-/* Copyright 2013-2016 IBM Corp.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
- * implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef __ROMCODE_H
-#define __ROMCODE_H
-
-#include <device.h>
-
-extern void romcode_probe(const struct dt_node *node);
-
-#endif /* __ROMCODE_H */
diff --git a/libstb/drivers/sw_driver.c b/libstb/drivers/sw_driver.c
deleted file mode 100644
index 287dae9d..00000000
--- a/libstb/drivers/sw_driver.c
+++ /dev/null
@@ -1,76 +0,0 @@
-/* Copyright 2013-2016 IBM Corp.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * 	http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
- * implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <chip.h>
-#include <string.h>
-#include <skiboot.h>
-#include <libstb/mbedtls/sha512.h>
-#include "../rom.h"
-#include "sw_driver.h"
-
-static sha2_hash_t *hw_key_hash = NULL;
-
-static int stb_software_verify(void *container __unused)
-{
-	return -100;
-}
-
-static void stb_software_sha512(const uint8_t *data, size_t len, uint8_t *digest)
-{
-	mbedtls_sha512_context ctx;
-	mbedtls_sha512_init(&ctx);
-	memset(digest, 0, sizeof(sha2_hash_t));
-	mbedtls_sha512_starts(&ctx, 0); // SHA512 = 0
-	mbedtls_sha512_update(&ctx, data, len);
-	mbedtls_sha512_finish(&ctx, digest);
-	mbedtls_sha512_free(&ctx);
-}
-
-static void stb_software_cleanup(void)
-{
-	return;
-}
-
-static struct rom_driver_ops sw_driver = {
-	.name    = "software",
-	.verify  = stb_software_verify,
-	.sha512  = stb_software_sha512,
-	.cleanup = stb_software_cleanup
-};
-
-void stb_software_probe(const struct dt_node *node)
-{
-	const char* hash_algo;
-
-	if (!dt_node_is_compatible(node, "ibm,secureboot-v1-softrom")) {
-		return;
-	}
-
-	hash_algo = dt_prop_get(node, "hash-algo");
-	if (strcmp(hash_algo, "sha512")) {
-		/**
-		 * @fwts-label ROMHashAlgorithmInvalid
-		 * @fwts-advice Hostboot creates the ibm,secureboot node and
-		 * the hash-algo property. Check that the ibm,secureboot node
-		 * layout has not changed.
-		 */
-		prlog(PR_ERR, "ROM: hash-algo=%s not expected\n", hash_algo);
-		return;
-	}
-	hw_key_hash = (sha2_hash_t*) dt_prop_get(node, "hw-key-hash");
-
-	rom_set_driver(&sw_driver);
-}
diff --git a/libstb/drivers/sw_driver.h b/libstb/drivers/sw_driver.h
deleted file mode 100644
index 73adabf0..00000000
--- a/libstb/drivers/sw_driver.h
+++ /dev/null
@@ -1,24 +0,0 @@
-/* Copyright 2013-2016 IBM Corp.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
- * implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef __SW_DRIVER_H
-#define __SW_DRIVER_H
-
-#include <device.h>
-
-extern void stb_software_probe(const struct dt_node *node);
-
-#endif /* __ROMCODE_H */