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armv7R: K3: am654: Add support to start ATF from R5 SPL

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Considering the boot time requirements, Cortex-A core
should be able to start immediately after SPL on R5.
Add support for the same.

Reviewed-by: Tom Rini <trini@konsulko.com>
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
This commit is contained in:
Lokesh Vutla 2018-11-02 19:51:05 +05:30 committed by Tom Rini
parent 890b2e750d
commit a3501a4a44
3 changed files with 60 additions and 0 deletions
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7
arch/arm/mach-k3/Kconfig
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@ -58,5 +58,12 @@ config SYS_K3_BOOT_CORE_ID
int
default 16
config SYS_K3_SPL_ATF
bool "Start Cortex-A from SPL"
depends on SPL && CPU_V7R
help
Enabling this will try to start Cortex-A (typically with ATF)
after SPL from R5.
source "board/ti/am65x/Kconfig"
endif

1
arch/arm/mach-k3/Makefile
View File

@ -6,3 +6,4 @@
obj-$(CONFIG_SOC_K3_AM6) += am6_init.o
obj-$(CONFIG_ARM64) += arm64-mmu.o
obj-$(CONFIG_CPU_V7R) += r5_mpu.o
obj-y += common.o

52
arch/arm/mach-k3/common.c Normal file
View File

@ -0,0 +1,52 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* K3: Common Architecture initialization
*
* Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/
* Lokesh Vutla <lokeshvutla@ti.com>
*/
#include <common.h>
#include <spl.h>
#include "common.h"
#include <dm.h>
#include <remoteproc.h>
#ifdef CONFIG_SYS_K3_SPL_ATF
void __noreturn jump_to_image_no_args(struct spl_image_info *spl_image)
{
int ret;
/*
* It is assumed that remoteproc device 1 is the corresponding
* cortex A core which runs ATF. Make sure DT reflects the same.
*/
ret = rproc_dev_init(1);
if (ret) {
printf("%s: ATF failed to Initialize on rproc: ret= %d\n",
__func__, ret);
hang();
}
ret = rproc_load(1, spl_image->entry_point, 0x200);
if (ret) {
printf("%s: ATF failed to load on rproc: ret= %d\n",
__func__, ret);
hang();
}
/* Add an extra newline to differentiate the ATF logs from SPL*/
printf("Starting ATF on ARM64 core...\n\n");
ret = rproc_start(1);
if (ret) {
printf("%s: ATF failed to start on rproc: ret= %d\n",
__func__, ret);
hang();
}
debug("ATF started. Wait indefiniely\n");
while (1)
asm volatile("wfe");
}
#endif