ARM: imx: Support larger SPL size on IMX6DQ
Previously the SPL size on all iMX6 platforms was restricted to 68KB
because the OCRAM size on iMX6SL/DL parts is only 128KB. However, the
other iMX6 variants have 256KB of OCRAM. Add an option
CONFIG_MX6_OCRAM_256KB which allows using the full size on boards which
don't need to support the SL/DL variants. This allows for an SPL size of
196KB, which makes it much easier to use configurations such as SPL with
driver model and FDT control.
Signed-off-by: Robert Hancock <hancock@sedsystems.ca>
Tested-by: Adam Ford <aford173@gmail.com> #imx6q_logic
diff --git a/include/configs/imx6_spl.h b/include/configs/imx6_spl.h
index 212dee7..a223930 100644
--- a/include/configs/imx6_spl.h
+++ b/include/configs/imx6_spl.h
@@ -7,10 +7,32 @@
#define __IMX6_SPL_CONFIG_H
#ifdef CONFIG_SPL
+
+#ifdef CONFIG_MX6_OCRAM_256KB
/*
- * see Figure 8-3 in IMX6DQ/IMX6SDL Reference manuals:
+ * see Figure 8.4.1 in IMX6DQ Reference manuals:
+ * - IMX6DQ OCRAM (IRAM) is from 0x00907000 to 0x0093FFFF
+ * - BOOT ROM stack is at 0x0093FFB8
+ * - if icache/dcache is enabled (eFuse/strapping controlled) then the
+ * IMX BOOT ROM will setup MMU table at 0x00938000, therefore we need to
+ * fit between 0x00907000 and 0x00938000.
+ * - Additionally the BOOT ROM loads what they consider the firmware image
+ * which consists of a 4K header in front of us that contains the IVT, DCD
+ * and some padding thus 'our' max size is really 0x00908000 - 0x00938000
+ * or 192KB
+ */
+#define CONFIG_SPL_MAX_SIZE 0x30000
+#define CONFIG_SPL_STACK 0x0093FFB8
+/*
+ * Pad SPL to 196KB (4KB header + 192KB max size). This allows to write the
+ * SPL/U-Boot combination generated with u-boot-with-spl.imx directly to a
+ * boot media (given that boot media specific offset is configured properly).
+ */
+#define CONFIG_SPL_PAD_TO 0x31000
+#else
+/*
+ * see Figure 8-3 in IMX6SDL Reference manuals:
* - IMX6SDL OCRAM (IRAM) is from 0x00907000 to 0x0091FFFF
- * - IMX6DQ has 2x IRAM of IMX6SDL but we intend to support IMX6SDL as well
* - BOOT ROM stack is at 0x0091FFB8
* - if icache/dcache is enabled (eFuse/strapping controlled) then the
* IMX BOOT ROM will setup MMU table at 0x00918000, therefore we need to
@@ -29,6 +51,8 @@
*/
#define CONFIG_SPL_PAD_TO 0x11000
+#endif
+
/* MMC support */
#if defined(CONFIG_SPL_MMC_SUPPORT)
#define CONFIG_SYS_MMCSD_FS_BOOT_PARTITION 1