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arm: K3: Introduce System Firmware loader framework

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Introduce a framework that allows loading the System Firmware (SYSFW)
binary as well as the associated configuration data from an image tree
blob named "sysfw.itb" from an FS-based MMC boot media or from an MMC
RAW mode partition or sector.

To simplify the handling of and loading from the different boot media
we tap into the existing U-Boot SPL framework usually used for loading
U-Boot by building on an earlier commit that exposes some of that
functionality.

Note that this initial implementation only supports FS and RAW-based
eMMC/SD card boot.

Signed-off-by: Andreas Dannenberg <dannenberg@ti.com>
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
This commit is contained in:
Andreas Dannenberg 2019-06-04 17:55:47 -05:00 committed by Tom Rini
parent e1eb6ada4e
commit 6df8706dc2
4 changed files with 314 additions and 0 deletions
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39
arch/arm/mach-k3/Kconfig
View file

@ -58,6 +58,45 @@ config SYS_K3_BOOT_CORE_ID
int
default 16
config K3_LOAD_SYSFW
bool
depends on SPL
config K3_SYSFW_IMAGE_NAME
string "File name of SYSFW firmware and configuration blob"
depends on K3_LOAD_SYSFW
default "sysfw.itb"
help
Filename of the combined System Firmware and configuration image tree
blob to be loaded when booting from a filesystem.
config K3_SYSFW_IMAGE_MMCSD_RAW_MODE_SECT
hex "MMC sector to load SYSFW firmware and configuration blob from"
depends on K3_LOAD_SYSFW && SYS_MMCSD_RAW_MODE_U_BOOT_USE_SECTOR
default 0x3600
help
Address on the MMC to load the combined System Firmware and
configuration image tree blob from, when the MMC is being used
in raw mode. Units: MMC sectors (1 sector = 512 bytes).
config K3_SYSFW_IMAGE_MMCSD_RAW_MODE_PART
hex "MMC partition to load SYSFW firmware and configuration blob from"
depends on K3_LOAD_SYSFW && SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION
default 2
help
Partition on the MMC to the combined System Firmware and configuration
image tree blob from, when the MMC is being used in raw mode.
config K3_SYSFW_IMAGE_SIZE_MAX
int "Amount of memory dynamically allocated for loading SYSFW blob"
depends on K3_LOAD_SYSFW
default 269000
help
Amount of memory (in bytes) reserved through dynamic allocation at
runtime for loading the combined System Firmware and configuration image
tree blob. Keep it as tight as possible, as this directly affects the
overall SPL memory footprint.
config SYS_K3_SPL_ATF
bool "Start Cortex-A from SPL"
depends on SPL && CPU_V7R

3
arch/arm/mach-k3/Makefile
View file

@ -7,4 +7,7 @@ obj-$(CONFIG_SOC_K3_AM6) += am6_init.o
obj-$(CONFIG_ARM64) += arm64-mmu.o
obj-$(CONFIG_CPU_V7R) += r5_mpu.o lowlevel_init.o
obj-$(CONFIG_TI_SECURE_DEVICE) += security.o
ifeq ($(CONFIG_SPL_BUILD),y)
obj-$(CONFIG_K3_LOAD_SYSFW) += sysfw-loader.o
endif
obj-y += common.o

12
arch/arm/mach-k3/include/mach/sysfw-loader.h Normal file
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@ -0,0 +1,12 @@
/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com/
* Andreas Dannenberg <dannenberg@ti.com>
*/
#ifndef _SYSFW_LOADER_H_
#define _SYSFW_LOADER_H_
void k3_sysfw_loader(void (*config_pm_done_callback)(void));
#endif

260
arch/arm/mach-k3/sysfw-loader.c Normal file
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@ -0,0 +1,260 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* K3: System Firmware Loader
*
* Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com/
* Andreas Dannenberg <dannenberg@ti.com>
*/
#include <common.h>
#include <spl.h>
#include <malloc.h>
#include <remoteproc.h>
#include <linux/soc/ti/ti_sci_protocol.h>
#include <asm/arch/sys_proto.h>
/* Name of the FIT image nodes for SYSFW and its config data */
#define SYSFW_FIRMWARE "sysfw.bin"
#define SYSFW_CFG_BOARD "board-cfg.bin"
#define SYSFW_CFG_PM "pm-cfg.bin"
#define SYSFW_CFG_RM "rm-cfg.bin"
#define SYSFW_CFG_SEC "sec-cfg.bin"
static bool sysfw_loaded;
static void *sysfw_load_address;
/*
* Populate SPL hook to override the default load address used by the SPL
* loader function with a custom address for SYSFW loading.
*/
struct image_header *spl_get_load_buffer(ssize_t offset, size_t size)
{
if (sysfw_loaded)
return (struct image_header *)(CONFIG_SYS_TEXT_BASE + offset);
else if (sysfw_load_address)
return sysfw_load_address;
else
panic("SYSFW load address not defined!");
}
/*
* Populate SPL hook to skip the default SPL loader FIT post-processing steps
* during SYSFW loading and return to the calling function so we can perform
* our own custom processing.
*/
bool spl_load_simple_fit_skip_processing(void)
{
return !sysfw_loaded;
}
static int fit_get_data_by_name(const void *fit, int images, const char *name,
const void **addr, size_t *size)
{
int node_offset;
node_offset = fdt_subnode_offset(fit, images, name);
if (node_offset < 0)
return -ENOENT;
return fit_image_get_data(fit, node_offset, addr, size);
}
static void k3_sysfw_load_using_fit(void *fit)
{
int images;
const void *sysfw_addr;
size_t sysfw_size;
int ret;
/* Find the node holding the images information */
images = fdt_path_offset(fit, FIT_IMAGES_PATH);
if (images < 0)
panic("Cannot find /images node (%d)\n", images);
/* Extract System Firmware (SYSFW) image from FIT */
ret = fit_get_data_by_name(fit, images, SYSFW_FIRMWARE,
&sysfw_addr, &sysfw_size);
if (ret < 0)
panic("Error accessing %s node in FIT (%d)\n", SYSFW_FIRMWARE,
ret);
/*
* Start up system controller firmware
*
* It is assumed that remoteproc device 0 is the corresponding
* system-controller that runs SYSFW. Make sure DT reflects the same.
*/
ret = rproc_dev_init(0);
if (ret)
panic("rproc failed to be initialized (%d)\n", ret);
ret = rproc_load(0, (ulong)sysfw_addr, (ulong)sysfw_size);
if (ret)
panic("Firmware failed to start on rproc (%d)\n", ret);
ret = rproc_start(0);
if (ret)
panic("Firmware init failed on rproc (%d)\n", ret);
}
static void k3_sysfw_configure_using_fit(void *fit,
struct ti_sci_handle *ti_sci)
{
struct ti_sci_board_ops *board_ops = &ti_sci->ops.board_ops;
int images;
const void *cfg_fragment_addr;
size_t cfg_fragment_size;
int ret;
/* Find the node holding the images information */
images = fdt_path_offset(fit, FIT_IMAGES_PATH);
if (images < 0)
panic("Cannot find /images node (%d)\n", images);
/* Extract board configuration from FIT */
ret = fit_get_data_by_name(fit, images, SYSFW_CFG_BOARD,
&cfg_fragment_addr, &cfg_fragment_size);
if (ret < 0)
panic("Error accessing %s node in FIT (%d)\n", SYSFW_CFG_BOARD,
ret);
/* Apply board configuration to SYSFW */
ret = board_ops->board_config(ti_sci,
(u64)(u32)cfg_fragment_addr,
(u32)cfg_fragment_size);
if (ret)
panic("Failed to set board configuration (%d)\n", ret);
/* Extract power/clock (PM) specific configuration from FIT */
ret = fit_get_data_by_name(fit, images, SYSFW_CFG_PM,
&cfg_fragment_addr, &cfg_fragment_size);
if (ret < 0)
panic("Error accessing %s node in FIT (%d)\n", SYSFW_CFG_PM,
ret);
/* Apply power/clock (PM) specific configuration to SYSFW */
ret = board_ops->board_config_pm(ti_sci,
(u64)(u32)cfg_fragment_addr,
(u32)cfg_fragment_size);
if (ret)
panic("Failed to set board PM configuration (%d)\n", ret);
/* Extract resource management (RM) specific configuration from FIT */
ret = fit_get_data_by_name(fit, images, SYSFW_CFG_RM,
&cfg_fragment_addr, &cfg_fragment_size);
if (ret < 0)
panic("Error accessing %s node in FIT (%d)\n", SYSFW_CFG_RM,
ret);
/* Apply resource management (RM) configuration to SYSFW */
ret = board_ops->board_config_rm(ti_sci,
(u64)(u32)cfg_fragment_addr,
(u32)cfg_fragment_size);
if (ret)
panic("Failed to set board RM configuration (%d)\n", ret);
/* Extract security specific configuration from FIT */
ret = fit_get_data_by_name(fit, images, SYSFW_CFG_SEC,
&cfg_fragment_addr, &cfg_fragment_size);
if (ret < 0)
panic("Error accessing %s node in FIT (%d)\n", SYSFW_CFG_SEC,
ret);
/* Apply security configuration to SYSFW */
ret = board_ops->board_config_security(ti_sci,
(u64)(u32)cfg_fragment_addr,
(u32)cfg_fragment_size);
if (ret)
panic("Failed to set board security configuration (%d)\n",
ret);
}
void k3_sysfw_loader(void (*config_pm_done_callback)(void))
{
struct spl_image_info spl_image = { 0 };
struct spl_boot_device bootdev = { 0 };
struct ti_sci_handle *ti_sci;
int ret;
/* Reserve a block of aligned memory for loading the SYSFW image */
sysfw_load_address = memalign(ARCH_DMA_MINALIGN,
CONFIG_K3_SYSFW_IMAGE_SIZE_MAX);
if (!sysfw_load_address)
panic("Error allocating %u bytes of memory for SYSFW image\n",
CONFIG_K3_SYSFW_IMAGE_SIZE_MAX);
debug("%s: allocated %u bytes at 0x%p\n", __func__,
CONFIG_K3_SYSFW_IMAGE_SIZE_MAX, sysfw_load_address);
/* Set load address for legacy modes that bypass spl_get_load_buffer */
spl_image.load_addr = (uintptr_t)sysfw_load_address;
bootdev.boot_device = spl_boot_device();
/* Load combined System Controller firmware and config data image */
switch (bootdev.boot_device) {
#if CONFIG_IS_ENABLED(MMC_SUPPORT)
case BOOT_DEVICE_MMC1:
case BOOT_DEVICE_MMC2:
case BOOT_DEVICE_MMC2_2:
ret = spl_mmc_load(&spl_image, &bootdev,
#ifdef CONFIG_K3_SYSFW_IMAGE_NAME
CONFIG_K3_SYSFW_IMAGE_NAME,
#else
NULL,
#endif
#ifdef CONFIG_K3_SYSFW_IMAGE_MMCSD_RAW_MODE_PART
CONFIG_K3_SYSFW_IMAGE_MMCSD_RAW_MODE_PART,
#else
0,
#endif
#ifdef CONFIG_K3_SYSFW_IMAGE_MMCSD_RAW_MODE_SECT
CONFIG_K3_SYSFW_IMAGE_MMCSD_RAW_MODE_SECT);
#else
0);
#endif
break;
#endif
default:
panic("Loading SYSFW image from device %u not supported!\n",
bootdev.boot_device);
}
if (ret)
panic("Error %d occurred during loading SYSFW image!\n", ret);
/*
* Now that SYSFW got loaded set helper flag to restore regular SPL
* loader behavior so we can later boot into the next stage as expected.
*/
sysfw_loaded = true;
/* Ensure the SYSFW image is in FIT format */
if (image_get_magic((const image_header_t *)sysfw_load_address) !=
FDT_MAGIC)
panic("SYSFW image not in FIT format!\n");
/* Extract and start SYSFW */
k3_sysfw_load_using_fit(sysfw_load_address);
/* Get handle for accessing SYSFW services */
ti_sci = get_ti_sci_handle();
/* Parse and apply the different SYSFW configuration fragments */
k3_sysfw_configure_using_fit(sysfw_load_address, ti_sci);
/*
* Now that all clocks and PM aspects are setup, invoke a user-
* provided callback function. Usually this callback would be used
* to setup or re-configure the U-Boot console UART.
*/
if (config_pm_done_callback)
config_pm_done_callback();
/* Output System Firmware version info */
printf("SYSFW ABI: %d.%d (firmware rev 0x%04x '%.*s')\n",
ti_sci->version.abi_major, ti_sci->version.abi_minor,
ti_sci->version.firmware_revision,
sizeof(ti_sci->version.firmware_description),
ti_sci->version.firmware_description);
}