[PATCH v2] arm64: renesas: Add Cortex-M33 build option to R-Car Gen5

[Kumar, Udit]

On 4/23/2026 4:19 AM, Marek Vasut wrote:
> The R-Car Gen5 SoCs contains Cortex-M33, Cortex-R52 and Cortex-A720AE
> cores. Add U-Boot build options for the Cortex-M33 core.
> 
> Since the Cortex-M33 core is a 32bit core, select V8M and ARM64 for
> RCAR64 accordingly. Select TMU timer on the 32bit core, where it is
> used instead of the ARMv8 timer. Adjust TMU timer base address to match
> the address map of the Cortex-M33 core. 

is there any reason, you can not use core's timer ?

Disable unused OF_BOARD_SETUP
> as well as unavailable POSITION_INDEPENDENT configuration options.
> 
> Signed-off-by: Marek Vasut <marek.vasut+renesas at mailbox.org>
> ---
> Cc: Anshul Dalal <anshuld at ti.com>
> Cc: Hai Pham <hai.pham.ud at renesas.com>
> Cc: Heinrich Schuchardt <xypron.glpk at gmx.de>
> Cc: Jesse Taube <mr.bossman075 at gmail.com>
> Cc: Nobuhiro Iwamatsu <iwamatsu at nigauri.org>
> Cc: Paul Barker <paul.barker.ct at bp.renesas.com>
> Cc: Quentin Schulz <quentin.schulz at cherry.de>
> Cc: Tien Fong Chee <tien.fong.chee at altera.com>
> Cc: Tom Rini <trini at konsulko.com>
> Cc: Udit Kumar <u-kumar1 at ti.com>
> Cc: u-boot at lists.denx.de
> ---
> V2: - Move Kconfig defaults from common to Kconfig.rcar5
>     - Rename RCAR_64_CM to RCAR_64_RSIP
>     - Select TMU_TIMER in RCAR_64_RSIP
>     - Add R-Car Gen5 into RCAR_64 code comment
> ---
>  arch/arm/mach-renesas/Kconfig                       | 13 +++++++++----
>  arch/arm/mach-renesas/Kconfig.rcar5                 | 11 +++++++++++
>  arch/arm/mach-renesas/include/mach/rcar-gen5-base.h |  6 ++++++
>  include/configs/rcar-gen5-common.h                  |  6 ++++++
>  4 files changed, 32 insertions(+), 4 deletions(-)
> 
> diff --git a/arch/arm/mach-renesas/Kconfig b/arch/arm/mach-renesas/Kconfig
> index fa4e312a4dd..c2640a58c03 100644
> --- a/arch/arm/mach-renesas/Kconfig
> +++ b/arch/arm/mach-renesas/Kconfig
> @@ -1,15 +1,20 @@
>  if ARCH_RENESAS
>  
> -# Renesas ARM SoCs R-Car Gen3/Gen4 (64bit)
> +config TMU_TIMER
> +	bool
> +
> +# Renesas ARM SoCs R-Car Gen3/Gen4/Gen5 (64bit)
>  config RCAR_64
>  	bool
> -	select ARM64
> +	select CPU_V8M if RCAR_64_RSIP
> +	select ARM64 if !RCAR_64_RSIP
> +	select TMU_TIMER if RCAR_64_RSIP

You can selecting TMU_TIMER, if this is M core, and later TMU_BASE is
defined for A core, as well or I am missing something.


>  	select CMD_CACHE
> -	select OF_BOARD_SETUP
> +	select OF_BOARD_SETUP if !RCAR_64_RSIP
>  	select PHY
>  	select PINCONF
>  	select PINCTRL
> -	select POSITION_INDEPENDENT
> +	select POSITION_INDEPENDENT if !RCAR_64_RSIP
>  	imply CMD_FS_UUID
>  	imply CMD_GPT
>  	imply CMD_MMC_SWRITE if MMC
> diff --git a/arch/arm/mach-renesas/Kconfig.rcar5 b/arch/arm/mach-renesas/Kconfig.rcar5
> index 528fc5aecc9..0e0e43c08e4 100644
> --- a/arch/arm/mach-renesas/Kconfig.rcar5
> +++ b/arch/arm/mach-renesas/Kconfig.rcar5
> @@ -1,5 +1,13 @@
>  if RCAR_GEN5
>  
> +config RCAR_64_RSIP
> +	bool "Renesas ARM SoCs R-Car Gen5 (use Cortex-M33 RSIP)"

Sorry but what is RSIP means here

> +	select SKIP_RELOCATE_CODE
> +	select TMU_TIMER

TMU_TIMER is selected here, then you can consider to drop
select TMU_TIMER if RCAR_64_RSIP, in little above of this patch

> +	help
> +	  Build U-Boot for the Cortex-M33 RSIP core present on selected SoC.
> +	  The default is n, meaning U-Boot is built for the Cortex-A core.
> +
>  menu "Select Target SoC"
>  
>  config R8A78000
> @@ -23,4 +31,7 @@ endchoice
>  
>  source "board/renesas/ironhide/Kconfig"
>  
> +config SKIP_RELOCATE_CODE_DATA_OFFSET
> +	default 0xa0000000 if RCAR_64_RSIP
> +
>  endif
> diff --git a/arch/arm/mach-renesas/include/mach/rcar-gen5-base.h b/arch/arm/mach-renesas/include/mach/rcar-gen5-base.h
> index f9af3ef885a..35b0d00e45c 100644
> --- a/arch/arm/mach-renesas/include/mach/rcar-gen5-base.h
> +++ b/arch/arm/mach-renesas/include/mach/rcar-gen5-base.h
> @@ -9,7 +9,13 @@
>  /*
>   * R-Car (R8A78000) I/O Addresses
>   */
> +#if defined(CONFIG_RCAR_64_RSIP)
> +/* Cortex-M33 address */
> +#define TMU_BASE		0xC0680000
> +#else
> +/* Cortex-A720AE address */
>  #define TMU_BASE		0x1C030000
> +#endif
>  
>  /* Arm Generic Timer */
>  #define CNTCR_BASE		0x1C000FFF /* Region 0 */
> diff --git a/include/configs/rcar-gen5-common.h b/include/configs/rcar-gen5-common.h
> index dc28d07c7f9..81b5e2aa5bb 100644
> --- a/include/configs/rcar-gen5-common.h
> +++ b/include/configs/rcar-gen5-common.h
> @@ -17,6 +17,12 @@
>  #define CFG_SYS_SDRAM_SIZE		(0x80000000u - DRAM_RSV_SIZE)
>  #define CFG_MAX_MEM_MAPPED		(0x80000000u - DRAM_RSV_SIZE)
>  
> +/* Timer */
> +#if defined(CONFIG_RCAR_64_RSIP)
> +#define CFG_SYS_TIMER_COUNTER		(TMU_BASE + 0xc)	/* TCNT0 */
> +#define CFG_SYS_TIMER_RATE		(133333333 / 4)

Please check for alignment

> +#endif
> +
>  /* Environment setting */
>  #define CFG_EXTRA_ENV_SETTINGS		\
>  	"bootm_size=0x10000000\0"