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From: Sascha Hauer <s.hauer@pengutronix.de>
To: Ahmad Fatoum <a.fatoum@pengutronix.de>
Cc: barebox@lists.infradead.org
Subject: Re: [PATCH 23/28] ARM: at91: sama5d27-som1: add additional first stage entry point
Date: Sun, 5 Jul 2020 20:46:25 +0200	[thread overview]
Message-ID: <20200705184625.GA15485@pengutronix.de> (raw)
In-Reply-To: <20200701091122.3437-24-a.fatoum@pengutronix.de>

On Wed, Jul 01, 2020 at 11:11:17AM +0200, Ahmad Fatoum wrote:
> The BootROM constrains us to a 64K big first stage bootloader. Add a PBL
> entry point for a xload barebox that sets up the minimum necessary to
> load a FAT32 barebox.bin from the SD-Card.
> 
> Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
> ---
>  arch/arm/boards/sama5d27-som1/lowlevel.c      | 32 +++++++++------
>  arch/arm/mach-at91/Kconfig                    |  1 +
>  arch/arm/mach-at91/include/mach/barebox-arm.h | 21 ++++++++++
>  .../include/mach/sama5d2-sip-ddramc.h         | 39 +++++++++++++++++++
>  images/Makefile.at91                          |  5 +++
>  5 files changed, 87 insertions(+), 11 deletions(-)
>  create mode 100644 arch/arm/mach-at91/include/mach/barebox-arm.h
>  create mode 100644 arch/arm/mach-at91/include/mach/sama5d2-sip-ddramc.h
> 
> diff --git a/arch/arm/boards/sama5d27-som1/lowlevel.c b/arch/arm/boards/sama5d27-som1/lowlevel.c
> index 2e408ce832f7..d52c4ca7465e 100644
> --- a/arch/arm/boards/sama5d27-som1/lowlevel.c
> +++ b/arch/arm/boards/sama5d27-som1/lowlevel.c
> @@ -5,13 +5,12 @@
>  
>  #include <common.h>
>  #include <init.h>
> -
> -#include <asm/barebox-arm-head.h>
> -#include <asm/barebox-arm.h>
> +#include <mach/barebox-arm.h>
>  #include <mach/sama5d2_ll.h>
>  #include <mach/iomux.h>
> +#include <mach/xload.h>
>  #include <debug_ll.h>
> -#include <mach/at91_dbgu.h>
> +#include <mach/sama5d2-sip-ddramc.h>
>  
>  #define RGB_LED_GREEN (1 << 0)
>  #define RGB_LED_RED   (1 << 1)
> @@ -40,23 +39,34 @@ static void ek_turn_led(unsigned color)
>  	}
>  }
>  
> -static void ek_dbgu_init(void)
> +SAMA5_ENTRY_FUNCTION(start_sama5d27_som1_ek_xload_mmc, r4)
>  {
> -	sama5d2_resetup_uart_console(MASTER_CLOCK);
> +	void __iomem *dbgu_base;
> +	sama5d2_lowlevel_init();
> +
> +	dbgu_base = sama5d2_resetup_uart_console(MASTER_CLOCK);
> +	if (IS_ENABLED(CONFIG_DEBUG_LL))
> +		putc_ll('>');

putc_ll() is a noop function when CONFIG_DEBUG_LL is disabled. No need
to put it inside a IS_ENABLED(CONFIG_DEBUG_LL).

Sascha

-- 
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  reply	other threads:[~2020-07-05 18:46 UTC|newest]

Thread overview: 41+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-01  9:10 [PATCH RESEND 00/28] ARM: at91: add sama5d2 first stage support Ahmad Fatoum
2020-07-01  9:10 ` [PATCH 01/28] ARM: at91: remove <mach/hardware.h> include from assembly code Ahmad Fatoum
2020-07-01  9:10 ` [PATCH 02/28] ARM: at91: sama5d2: cast peripheral base addresses to __iomem pointers Ahmad Fatoum
2020-07-01  9:10 ` [PATCH 03/28] ARM: at91: import at91bootstrap's at91_ddrsdrc.h Ahmad Fatoum
2020-07-01  9:10 ` [PATCH 04/28] ARM: at91: migrate at91sam9_ddrsdr.h to use " Ahmad Fatoum
2020-07-01  9:10 ` [PATCH 05/28] ARM: at91: replace at91sam9_ddrsdr.h with " Ahmad Fatoum
2020-07-01  9:11 ` [PATCH 06/28] ARM: at91: import early_udelay from at91bootstrap Ahmad Fatoum
2020-07-01  9:11 ` [PATCH 07/28] ARM: at91: import low level DDRAMC initialization code " Ahmad Fatoum
2020-07-01  9:11 ` [PATCH 08/28] ARM: at91: watchdog: implement at91_wdt_disable Ahmad Fatoum
2020-07-01  9:11 ` [PATCH 09/28] watchdog: add support for at91sam9/sama5 watchdog Ahmad Fatoum
2020-07-01  9:11 ` [PATCH 10/28] ARM: at91: implement sama5d2 lowlevel init Ahmad Fatoum
2020-07-01  9:11 ` [PATCH 11/28] ARM: at91: sama5d2: add sama5d2 matrix configuration Ahmad Fatoum
2020-07-01  9:11 ` [PATCH 12/28] ARM: at91: add sama5d2 cache init Ahmad Fatoum
2020-07-01  9:11 ` [PATCH 13/28] ARM: at91: add necessary Advanced Interrupt Controller configuration Ahmad Fatoum
2020-07-01  9:11 ` [PATCH 14/28] ARM: at91: extend low level PMC driver for generic clk support Ahmad Fatoum
2020-07-01  9:11 ` [PATCH 15/28] pbl: add block I/O API Ahmad Fatoum
2020-07-01  9:11 ` [PATCH 16/28] fs: fat: extend for in-PBL support Ahmad Fatoum
2020-07-01  9:11 ` [PATCH 17/28] mci: sdhci: atmel: extend driver for PBL usage Ahmad Fatoum
2020-07-05 18:52   ` Sascha Hauer
2020-07-05 22:32     ` Ahmad Fatoum
2020-07-01  9:11 ` [PATCH 18/28] ARM: at91: add code for sama5 boot source detection Ahmad Fatoum
2020-07-01  9:11 ` [PATCH 19/28] ARM: at91: add helpers for chain-loading barebox from SD-card Ahmad Fatoum
2020-07-05 18:42   ` Sascha Hauer
2020-07-05 22:35     ` Ahmad Fatoum
2020-07-06  6:26       ` [PATCH] fixup! " Ahmad Fatoum
2020-07-09 14:19       ` [PATCH 19/28] " Sascha Hauer
2020-07-09 15:01         ` [PATCH v2] fixup! " Ahmad Fatoum
2020-07-01  9:11 ` [PATCH 20/28] ARM: at91: sama5d2: reuse stack set-up by first stage Ahmad Fatoum
2020-07-01  9:11 ` [PATCH 21/28] ARM: at91: debug_ll: remove duplicated IS_ENABLED(CONFIG_DEBUG_LL) condition Ahmad Fatoum
2020-07-01  9:11 ` [PATCH 22/28] ARM: at91: sama5d2: reduce UART setup boilerplate with new helpers Ahmad Fatoum
2020-07-01  9:11 ` [PATCH 23/28] ARM: at91: sama5d27-som1: add additional first stage entry point Ahmad Fatoum
2020-07-05 18:46   ` Sascha Hauer [this message]
2020-07-06  6:22   ` [PATCH] fixup! " Ahmad Fatoum
2020-07-01  9:11 ` [PATCH 24/28] ARM: at91: sama5d2: read back memory size from DDRAM controller Ahmad Fatoum
2020-07-01  9:11 ` [PATCH 25/28] ARM: at91: sama5d2: populate $bootsource and $bootsource_instance Ahmad Fatoum
2020-07-01  9:11 ` [PATCH 26/28] ARM: at91: sama5d27-som1-ek: add barebox_update and multi environment support Ahmad Fatoum
2020-07-01  9:11 ` [PATCH 27/28] ARM: at91: sama5d27-giantboard: add additional first stage entry point Ahmad Fatoum
2020-07-06  6:22   ` [PATCH] fixup! " Ahmad Fatoum
2020-07-01  9:11 ` [PATCH 28/28] ARM: at91: sama5d27-giantboard: add default environment/bbu Ahmad Fatoum
2020-07-11  5:13 ` [PATCH RESEND 00/28] ARM: at91: add sama5d2 first stage support Sascha Hauer
  -- strict thread matches above, loose matches on Subject: below --
2020-07-01  5:23 [PATCH " Ahmad Fatoum
2020-07-01  5:23 ` [PATCH 23/28] ARM: at91: sama5d27-som1: add additional first stage entry point Ahmad Fatoum

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