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Merge pull request #1032 from soby-mathew/sm/css_scp_reorg 

Reorganise CSS SCP bootloader layer
This commit is contained in:
davidcunado-arm 2017-07-26 12:31:41 +01:00 committed by GitHub
parent 881cf37438 1ea63d77a1
commit 401e4911bc
9 changed files with 74 additions and 48 deletions
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18
include/plat/arm/css/common/css_def.h
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@ -128,16 +128,22 @@
* an SCP_BL2/SCP_BL2U image.
*/
#if CSS_LOAD_SCP_IMAGES
#if ARM_BL31_IN_DRAM
#error "SCP_BL2 is not expected to be loaded by BL2 for ARM_BL31_IN_DRAM config"
#endif
/*
* Load address of SCP_BL2 in CSS platform ports
* SCP_BL2 is loaded to the same place as BL31. Once SCP_BL2 is transferred to the
* SCP, it is discarded and BL31 is loaded over the top.
* SCP_BL2 is loaded to the same place as BL31 but it shouldn't overwrite BL1
* rw data. Once SCP_BL2 is transferred to the SCP, it is discarded and BL31
* is loaded over the top.
*/
#define SCP_BL2_BASE BL31_BASE
#define SCP_BL2_LIMIT (SCP_BL2_BASE + PLAT_CSS_MAX_SCP_BL2_SIZE)
#define SCP_BL2_BASE (BL1_RW_BASE - PLAT_CSS_MAX_SCP_BL2_SIZE)
#define SCP_BL2_LIMIT BL1_RW_BASE
#define SCP_BL2U_BASE BL31_BASE
#define SCP_BL2U_LIMIT (SCP_BL2U_BASE + PLAT_CSS_MAX_SCP_BL2U_SIZE)
#define SCP_BL2U_BASE (BL1_RW_BASE - PLAT_CSS_MAX_SCP_BL2U_SIZE)
#define SCP_BL2U_LIMIT BL1_RW_BASE
#endif /* CSS_LOAD_SCP_IMAGES */
/* Load address of Non-Secure Image for CSS platform ports */

8
plat/arm/board/juno/include/platform_def.h
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2014-2016, ARM Limited and Contributors. All rights reserved.
* Copyright (c) 2014-2017, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
@ -106,7 +106,7 @@
* little space for growth.
*/
#if TRUSTED_BOARD_BOOT
# define PLAT_ARM_MAX_BL2_SIZE 0x1D000
# define PLAT_ARM_MAX_BL2_SIZE 0x18000
#else
# define PLAT_ARM_MAX_BL2_SIZE 0xC000
#endif
@ -172,13 +172,13 @@
* PLAT_CSS_MAX_SCP_BL2_SIZE is calculated using the current
* SCP_BL2 size plus a little space for growth.
*/
#define PLAT_CSS_MAX_SCP_BL2_SIZE 0x1D000
#define PLAT_CSS_MAX_SCP_BL2_SIZE 0x14000
/*
* PLAT_CSS_MAX_SCP_BL2U_SIZE is calculated using the current
* SCP_BL2U size plus a little space for growth.
*/
#define PLAT_CSS_MAX_SCP_BL2U_SIZE 0x1D000
#define PLAT_CSS_MAX_SCP_BL2U_SIZE 0x14000
/*
* Define a list of Group 1 Secure and Group 0 interrupts as per GICv3

7
plat/arm/css/common/css_bl2_setup.c
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@ -11,7 +11,7 @@
#include <plat_arm.h>
#include <string.h>
#include <utils.h>
#include "css_scp_bootloader.h"
#include "../drivers/scp/css_scp.h"
/* Weak definition may be overridden in specific CSS based platform */
#if LOAD_IMAGE_V2
@ -34,9 +34,12 @@ int bl2_plat_handle_scp_bl2(image_info_t *scp_bl2_image_info)
INFO("BL2: Initiating SCP_BL2 transfer to SCP\n");
ret = scp_bootloader_transfer((void *)scp_bl2_image_info->image_base,
ret = css_scp_boot_image_xfer((void *)scp_bl2_image_info->image_base,
scp_bl2_image_info->image_size);
if (ret == 0)
ret = css_scp_boot_ready();
if (ret == 0)
INFO("BL2: SCP_BL2 transferred to SCP\n");
else

9
plat/arm/css/common/css_bl2u_setup.c
View File

@ -1,5 +1,5 @@
/*
* Copyright (c) 2015, ARM Limited and Contributors. All rights reserved.
* Copyright (c) 2015-2017, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
@ -7,7 +7,7 @@
#include <bl_common.h>
#include <debug.h>
#include <plat_arm.h>
#include "css_scp_bootloader.h"
#include "../drivers/scp/css_scp.h"
/* Weak definition may be overridden in specific CSS based platform */
#pragma weak bl2u_plat_handle_scp_bl2u
@ -40,9 +40,12 @@ int bl2u_plat_handle_scp_bl2u(void)
INFO("BL2U: Initiating SCP_BL2U transfer to SCP\n");
ret = scp_bootloader_transfer((void *)scp_bl2u_image_info.image_base,
ret = css_scp_boot_image_xfer((void *)scp_bl2u_image_info.image_base,
scp_bl2u_image_info.image_size);
if (ret == 0)
ret = css_scp_boot_ready();
if (ret == 0)
INFO("BL2U: SCP_BL2U transferred to SCP\n");
else

4
plat/arm/css/common/css_common.mk
View File

@ -56,8 +56,8 @@ ifeq (${CSS_LOAD_SCP_IMAGES},1)
$(eval $(call FWU_FIP_ADD_IMG,SCP_BL2U,--scp-fwu-cfg))
endif
BL2U_SOURCES += plat/arm/css/common/css_scp_bootloader.c
BL2_SOURCES += plat/arm/css/common/css_scp_bootloader.c
BL2U_SOURCES += plat/arm/css/drivers/scp/css_bom_bootloader.c
BL2_SOURCES += plat/arm/css/drivers/scp/css_bom_bootloader.c
endif
# Enable option to detect whether the SCP ROM firmware in use predates version

12
plat/arm/css/common/css_scp_bootloader.h
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@ -1,12 +0,0 @@
/*
* Copyright (c) 2014, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#ifndef __CSS_SCP_BOOTLOADER_H__
#define __CSS_SCP_BOOTLOADER_H__
int scp_bootloader_transfer(void *image, unsigned int image_size);
#endif /* __CSS_SCP_BOOTLOADER_H__ */

26
plat/arm/css/common/css_scp_bootloader.c → plat/arm/css/drivers/scp/css_bom_bootloader.c
View File

@ -1,18 +1,17 @@
/*
* Copyright (c) 2014-2016, ARM Limited and Contributors. All rights reserved.
* Copyright (c) 2014-2017, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <arch_helpers.h>
#include <assert.h>
#include <cassert.h>
#include <css_def.h>
#include <debug.h>
#include <platform.h>
#include <stdint.h>
#include "../drivers/scpi/css_mhu.h"
#include "../drivers/scpi/css_scpi.h"
#include "css_scp_bootloader.h"
#include "../scpi/css_mhu.h"
/* ID of the MHU slot used for the BOM protocol */
#define BOM_MHU_SLOT_ID 0
@ -46,6 +45,18 @@ typedef struct {
uint32_t block_size;
} cmd_data_payload_t;
/*
* All CSS platforms load SCP_BL2/SCP_BL2U just below BL rw-data and above
* BL2/BL2U (this is where BL31 usually resides except when ARM_BL31_IN_DRAM is
* set. Ensure that SCP_BL2/SCP_BL2U do not overflow into BL1 rw-data nor
* BL2/BL2U.
*/
CASSERT(SCP_BL2_LIMIT <= BL1_RW_BASE, assert_scp_bl2_overwrite_bl1);
CASSERT(SCP_BL2U_LIMIT <= BL1_RW_BASE, assert_scp_bl2u_overwrite_bl1);
CASSERT(SCP_BL2_BASE >= BL2_LIMIT, assert_scp_bl2_overwrite_bl2);
CASSERT(SCP_BL2U_BASE >= BL2U_LIMIT, assert_scp_bl2u_overwrite_bl2u);
static void scp_boot_message_start(void)
{
mhu_secure_message_start(BOM_MHU_SLOT_ID);
@ -88,7 +99,7 @@ static void scp_boot_message_end(void)
mhu_secure_message_end(BOM_MHU_SLOT_ID);
}
int scp_bootloader_transfer(void *image, unsigned int image_size)
int css_scp_boot_image_xfer(void *image, unsigned int image_size)
{
uint32_t response;
uint32_t checksum;
@ -170,8 +181,5 @@ int scp_bootloader_transfer(void *image, unsigned int image_size)
return -1;
}
VERBOSE("Waiting for SCP to signal it is ready to go on\n");
/* Wait for SCP to signal it's ready */
return scpi_wait_ready();
return 0;
}

26
plat/arm/css/drivers/scp/css_scp.h
View File

@ -1,5 +1,5 @@
/*
* Copyright (c) 2016, ARM Limited and Contributors. All rights reserved.
* Copyright (c) 2016-2017, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
@ -7,13 +7,31 @@
#ifndef __CSS_SCP_H__
#define __CSS_SCP_H__
#include <psci.h>
#include <types.h>
#include "../scpi/css_scpi.h"
void css_scp_suspend(const psci_power_state_t *target_state);
void css_scp_off(const psci_power_state_t *target_state);
/* Forward declarations */
struct psci_power_state;
/* API for power management by SCP */
void css_scp_suspend(const struct psci_power_state *target_state);
void css_scp_off(const struct psci_power_state *target_state);
void css_scp_on(u_register_t mpidr);
int css_scp_get_power_state(u_register_t mpidr, unsigned int power_level);
void __dead2 css_scp_sys_shutdown(void);
void __dead2 css_scp_sys_reboot(void);
/* API for SCP Boot Image transfer. Return 0 on success, -1 on error */
int css_scp_boot_image_xfer(void *image, unsigned int image_size);
/*
* API to wait for SCP to signal till it's ready after booting the transferred
* image.
*/
static inline int css_scp_boot_ready(void)
{
VERBOSE("Waiting for SCP to signal it is ready to go on\n");
return scpi_wait_ready();
}
#endif /* __CSS_SCP_H__ */

12
plat/arm/css/drivers/scpi/css_scpi.h
View File

@ -1,5 +1,5 @@
/*
* Copyright (c) 2014-2016, ARM Limited and Contributors. All rights reserved.
* Copyright (c) 2014-2017, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
@ -97,11 +97,11 @@ typedef enum {
scpi_system_reset = 2
} scpi_system_state_t;
extern int scpi_wait_ready(void);
extern void scpi_set_css_power_state(unsigned int mpidr,
scpi_power_state_t cpu_state,
scpi_power_state_t cluster_state,
scpi_power_state_t css_state);
int scpi_wait_ready(void);
void scpi_set_css_power_state(unsigned int mpidr,
scpi_power_state_t cpu_state,
scpi_power_state_t cluster_state,
scpi_power_state_t css_state);
int scpi_get_css_power_state(unsigned int mpidr, unsigned int *cpu_state_p,
unsigned int *cluster_state_p);
uint32_t scpi_sys_power_state(scpi_system_state_t system_state);