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From: Ahmad Fatoum <a.fatoum@pengutronix.de>
To: barebox@lists.infradead.org
Cc: Ahmad Fatoum <a.fatoum@pengutronix.de>
Subject: [PATCH 27/28] ARM: at91: sama5d27-giantboard: add additional first stage entry point
Date: Wed,  1 Jul 2020 07:23:39 +0200	[thread overview]
Message-ID: <20200701052340.9462-28-a.fatoum@pengutronix.de> (raw)
In-Reply-To: <20200701052340.9462-1-a.fatoum@pengutronix.de>

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>
---
 .../arm/boards/sama5d27-giantboard/lowlevel.c | 28 +++++++++++++------
 images/Makefile.at91                          |  5 ++++
 2 files changed, 24 insertions(+), 9 deletions(-)

diff --git a/arch/arm/boards/sama5d27-giantboard/lowlevel.c b/arch/arm/boards/sama5d27-giantboard/lowlevel.c
index 3dada9baf23c..dc678e5d83ce 100644
--- a/arch/arm/boards/sama5d27-giantboard/lowlevel.c
+++ b/arch/arm/boards/sama5d27-giantboard/lowlevel.c
@@ -5,22 +5,34 @@
 
 #include <common.h>
 #include <init.h>
-
-#include <asm/barebox-arm-head.h>
 #include <mach/barebox-arm.h>
 #include <mach/sama5d2_ll.h>
+#include <mach/xload.h>
+#include <mach/sama5d2-sip-ddramc.h>
 #include <mach/iomux.h>
 #include <debug_ll.h>
-#include <mach/at91_dbgu.h>
 
 /* PCK = 492MHz, MCK = 164MHz */
 #define MASTER_CLOCK	164000000
 
-static void dbgu_init(void)
+SAMA5_ENTRY_FUNCTION(start_sama5d27_giantboard_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('>');
+	relocate_to_current_adr();
+	setup_c();
+
+	pbl_set_putc(at91_dbgu_putc, dbgu_base);
+
+	sama5d2_udelay_init(MASTER_CLOCK);
+	sama5d2_d1g_ddrconf();
+	sama5d2_sdhci_start_image(r4);
 }
 
 extern char __dtb_z_at91_sama5d27_giantboard_start[];
@@ -29,10 +41,8 @@ SAMA5_ENTRY_FUNCTION(start_sama5d27_giantboard, r4)
 {
 	void *fdt;
 
-	arm_cpu_lowlevel_init();
-
 	if (IS_ENABLED(CONFIG_DEBUG_LL))
-		dbgu_init();
+		putc_ll('>');
 
 	fdt = __dtb_z_at91_sama5d27_giantboard_start + get_runtime_offset();
 
diff --git a/images/Makefile.at91 b/images/Makefile.at91
index bc63357c5d19..00fa4cab27ea 100644
--- a/images/Makefile.at91
+++ b/images/Makefile.at91
@@ -26,3 +26,8 @@ image-$(CONFIG_MACH_SAMA5D27_SOM1) += barebox-sama5d27-som1-ek-xload-mmc.img
 pblb-$(CONFIG_MACH_SAMA5D27_GIANTBOARD) += start_sama5d27_giantboard
 FILE_barebox-groboards-sama5d27-giantboard.img = start_sama5d27_giantboard.pblb
 image-$(CONFIG_MACH_SAMA5D27_GIANTBOARD) += barebox-groboards-sama5d27-giantboard.img
+
+pblb-$(CONFIG_MACH_SAMA5D27_GIANTBOARD) += start_sama5d27_giantboard_xload_mmc
+FILE_barebox-groboards-sama5d27-giantboard-xload-mmc.img = start_sama5d27_giantboard_xload_mmc.pblb
+MAX_PBL_IMAGE_SIZE_start_sama5d27_giantboard_xload_mmc = 0xffff
+image-$(CONFIG_MACH_SAMA5D27_GIANTBOARD) += barebox-groboards-sama5d27-giantboard-xload-mmc.img
-- 
2.27.0


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  parent reply	other threads:[~2020-07-01  5:24 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-01  5:23 [PATCH 00/28] ARM: at91: add sama5d2 first stage support Ahmad Fatoum
2020-07-01  5:23 ` [PATCH 01/28] ARM: at91: remove <mach/hardware.h> include from assembly code Ahmad Fatoum
2020-07-01  5:23 ` [PATCH 02/28] ARM: at91: sama5d2: cast peripheral base addresses to __iomem pointers Ahmad Fatoum
2020-07-01  5:23 ` [PATCH 03/28] ARM: at91: import at91bootstrap's at91_ddrsdrc.h Ahmad Fatoum
2020-07-01  5:23 ` [PATCH 04/28] ARM: at91: migrate at91sam9_ddrsdr.h to use " Ahmad Fatoum
2020-07-01  5:23 ` [PATCH 05/28] ARM: at91: replace at91sam9_ddrsdr.h with " Ahmad Fatoum
2020-07-01  5:23 ` [PATCH 06/28] ARM: at91: import early_udelay from at91bootstrap Ahmad Fatoum
2020-07-01  5:23 ` [PATCH 07/28] ARM: at91: import low level DDRAMC initialization code " Ahmad Fatoum
2020-07-01  5:23 ` [PATCH 08/28] ARM: at91: watchdog: implement at91_wdt_disable Ahmad Fatoum
2020-07-01  5:23 ` [PATCH 09/28] watchdog: add support for at91sam9/sama5 watchdog Ahmad Fatoum
2020-07-01  5:23 ` [PATCH 10/28] ARM: at91: implement sama5d2 lowlevel init Ahmad Fatoum
2020-07-01  5:23 ` [PATCH 11/28] ARM: at91: sama5d2: add sama5d2 matrix configuration Ahmad Fatoum
2020-07-01  5:23 ` [PATCH 12/28] ARM: at91: add sama5d2 cache init Ahmad Fatoum
2020-07-01  5:23 ` [PATCH 13/28] ARM: at91: add necessary Advanced Interrupt Controller configuration Ahmad Fatoum
2020-07-01  5:23 ` [PATCH 14/28] ARM: at91: extend low level PMC driver for generic clk support Ahmad Fatoum
2020-07-01  5:23 ` [PATCH 15/28] pbl: add block I/O API Ahmad Fatoum
2020-07-01  5:23 ` [PATCH 16/28] fs: fat: extend for in-PBL support Ahmad Fatoum
2020-07-01  5:23 ` [PATCH 17/28] mci: extend atmel-sdhci driver to first stage use Ahmad Fatoum
2020-07-01  5:23 ` [PATCH 18/28] ARM: at91: add code for sama5 boot source detection Ahmad Fatoum
2020-07-01  5:23 ` [PATCH 19/28] ARM: at91: add helpers for chain-loading barebox from SD-card Ahmad Fatoum
2020-07-01  5:23 ` [PATCH 20/28] ARM: at91: sama5d2: reuse stack set-up by first stage Ahmad Fatoum
2020-07-01  5:23 ` [PATCH 21/28] at91: debug_ll: remove duplicated IS_ENABLED(CONFIG_DEBUG_LL) condition Ahmad Fatoum
2020-07-01  5:23 ` [PATCH 22/28] ARM: at91: sama5d2: reduce UART setup boilerplate with new helpers Ahmad Fatoum
2020-07-01  5:23 ` [PATCH 23/28] ARM: at91: sama5d27-som1: add additional first stage entry point Ahmad Fatoum
2020-07-01  5:23 ` [PATCH 24/28] ARM: at91: sama5d2: read back memory size from DDRAM controller Ahmad Fatoum
2020-07-01  5:23 ` [PATCH 25/28] ARM: at91: sama5d2: populate $bootsource and $bootsource_instance Ahmad Fatoum
2020-07-01  5:23 ` [PATCH 26/28] ARM: at91: sama5d27-som1-ek: add barebox_update and multi environment support Ahmad Fatoum
2020-07-01  5:23 ` Ahmad Fatoum [this message]
2020-07-01  5:23 ` [PATCH 28/28] ARM: at91: sama5d27-giantboard: add default environment/bbu Ahmad Fatoum
2020-07-01  9:10 [PATCH RESEND 00/28] ARM: at91: add sama5d2 first stage support Ahmad Fatoum
2020-07-01  9:11 ` [PATCH 27/28] ARM: at91: sama5d27-giantboard: add additional first stage entry point Ahmad Fatoum

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