diff options
| author | Dave Gerlach <d-gerlach@ti.com> | 2021-04-23 19:27:35 +0300 |
|---|---|---|
| committer | Lokesh Vutla <lokeshvutla@ti.com> | 2021-05-12 13:57:57 +0300 |
| commit | 6d52c9dd9022314f494c087fbd7dc68836896523 (patch) | |
| tree | c8e06d7859d0bfe97a4dde56a20adbc91fe18e45 /arch/arm/mach-k3 | |
| parent | b4a8c3b242aced38ee7aa1cce664f0108fc3242c (diff) | |
| download | u-boot-6d52c9dd9022314f494c087fbd7dc68836896523.tar.xz | |
arm: mach-k3: am642: Store boot info from ROM
For AM642, ROM supports loading system firmware directly
from boot image. ROM passes information about the number of
images that are loaded to bootloader at a specific address
that is temporary. Add support for storing this information
somewhere permanent before it gets corrupted.
Signed-off-by: Dave Gerlach <d-gerlach@ti.com>
Diffstat (limited to 'arch/arm/mach-k3')
| -rw-r--r-- | arch/arm/mach-k3/am642_init.c | 21 | ||||
| -rw-r--r-- | arch/arm/mach-k3/include/mach/am64_hardware.h | 2 |
2 files changed, 23 insertions, 0 deletions
diff --git a/arch/arm/mach-k3/am642_init.c b/arch/arm/mach-k3/am642_init.c index aa0eb72a87..08f0b736a1 100644 --- a/arch/arm/mach-k3/am642_init.c +++ b/arch/arm/mach-k3/am642_init.c @@ -29,12 +29,33 @@ static void ctrl_mmr_unlock(void) mmr_unlock(CTRL_MMR0_BASE, 6); } +/* + * This uninitialized global variable would normal end up in the .bss section, + * but the .bss is cleared between writing and reading this variable, so move + * it to the .data section. + */ +u32 bootindex __section(".data"); +static struct rom_extended_boot_data bootdata __section(.data); + +static void store_boot_info_from_rom(void) +{ + bootindex = *(u32 *)(CONFIG_SYS_K3_BOOT_PARAM_TABLE_INDEX); + memcpy(&bootdata, (uintptr_t *)ROM_ENTENDED_BOOT_DATA_INFO, + sizeof(struct rom_extended_boot_data)); +} + void board_init_f(ulong dummy) { #if defined(CONFIG_CPU_V7R) setup_k3_mpu_regions(); #endif + /* + * Cannot delay this further as there is a chance that + * K3_BOOT_PARAM_TABLE_INDEX can be over written by SPL MALLOC section. + */ + store_boot_info_from_rom(); + ctrl_mmr_unlock(); /* Init DM early */ diff --git a/arch/arm/mach-k3/include/mach/am64_hardware.h b/arch/arm/mach-k3/include/mach/am64_hardware.h index 06b19b80db..8dc318bfbf 100644 --- a/arch/arm/mach-k3/include/mach/am64_hardware.h +++ b/arch/arm/mach-k3/include/mach/am64_hardware.h @@ -47,4 +47,6 @@ #define CTRLMMR_LOCK_KICK1 0x0100c #define CTRLMMR_LOCK_KICK1_UNLOCK_VAL 0xd172bc5a +#define ROM_ENTENDED_BOOT_DATA_INFO 0x701beb00 + #endif /* __ASM_ARCH_DRA8_HARDWARE_H */ |