TI: Rework SRAM definitions and maximums

On all TI platforms the ROM defines a "downloaded image" area at or near
the start of SRAM which is followed by a reserved area.  As it is at
best bad form and at worst possibly harmful in corner cases to write in
this reserved area, we stop doing that by adding in the define
NON_SECURE_SRAM_IMG_END to say where the end of the downloaded image
area is and make SRAM_SCRATCH_SPACE_ADDR be one kilobyte before this.
At current we define the end of scratch space at 0x228 bytes past the
start of scratch space this this gives us a lot of room to grow.  As
these scratch uses are non-optional today, all targets are modified to
respect this boundary.

Tested on OMAP4 Pandaboard, OMAP3 Beagle xM

Cc: Albert Aribaud <albert.u.boot@aribaud.net>
Cc: Nagendra T S <nagendra@mistralsolutions.com>
Cc: Vaibhav Hiremath <hvaibhav@ti.com>
Cc: Lokesh Vutla <lokeshvutla@ti.com>
Cc: Felipe Balbi <balbi@ti.com>
Cc: Igor Grinberg <grinberg@compulab.co.il>
Cc: Nikita Kiryanov <nikita@compulab.co.il>
Cc: Paul Kocialkowski <contact@paulk.fr>
Cc: Enric Balletbo i Serra <eballetbo@gmail.com>
Cc: Adam Ford <aford173@gmail.com>
Cc: Steve Sakoman <sakoman@gmail.com>
Cc: Stefan Roese <sr@denx.de>
Cc: Thomas Weber <weber@corscience.de>
Cc: Hannes Schmelzer <oe5hpm@oevsv.at>
Cc: Thomas Chou <thomas@wytron.com.tw>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Simon Glass <sjg@chromium.org>
Cc: Joe Hershberger <joe.hershberger@ni.com>
Cc: Sam Protsenko <semen.protsenko@linaro.org>
Cc: Heiko Schocher <hs@denx.de>
Cc: Samuel Egli <samuel.egli@siemens.com>
Cc: Michal Simek <michal.simek@xilinx.com>
Cc: Wolfgang Denk <wd@denx.de>
Cc: Mateusz Kulikowski <mateusz.kulikowski@gmail.com>
Cc: Ben Whitten <ben.whitten@gmail.com>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Bin Meng <bmeng.cn@gmail.com>
Cc: Sekhar Nori <nsekhar@ti.com>
Cc: Mugunthan V N <mugunthanvnm@ti.com>
Cc: "B, Ravi" <ravibabu@ti.com>
Cc: "Matwey V. Kornilov" <matwey.kornilov@gmail.com>
Cc: Ladislav Michl <ladis@linux-mips.org>
Cc: Ash Charles <ashcharles@gmail.com>
Cc: "Kipisz, Steven" <s-kipisz2@ti.com>
Cc: Daniel Allred <d-allred@ti.com>
Signed-off-by: Tom Rini <trini@konsulko.com>
Tested-by: Lokesh Vutla <lokeshvutla@ti.com>
Acked-by: Lokesh Vutla <lokeshvutla@ti.com>
Tested-by: Ladislav Michl <ladis@linux-mips.org>

1 files changed, 13 insertions, 8 deletions

diff --git a/include/configs/ti_armv7_common.h b/include/configs/ti_armv7_common.h
index 9f947ee..d60d213 100644
--- a/include/configs/ti_armv7_common.h
+++ b/include/configs/ti_armv7_common.h
@@ -212,14 +212,14 @@
 /*
  * Place the image at the start of the ROM defined image space (per
  * CONFIG_SPL_TEXT_BASE and we limit our size to the ROM-defined
- * downloaded image area.  We initalize DRAM as soon as we can so that
- * we can place stack, malloc and BSS there.  We load U-Boot itself into
- * memory at 0x80800000 for legacy reasons (to not conflict with older
- * SPLs).  We have our BSS be placed 2MiB after this, to allow for the
- * default Linux kernel address of 0x80008000 to work with most sized
- * kernels, in the Falcon Mode case.  We have the SPL malloc pool at the
- * end of the BSS area.  We suggest that the stack be placed at 32MiB after
- * the start of DRAM to allow room for all of the above (handled in Kconfig).
+ * downloaded image area minus 1KiB for scratch space.  We initalize DRAM as
+ * soon as we can so that we can place stack, malloc and BSS there.  We load
+ * U-Boot itself into memory at 0x80800000 for legacy reasons (to not conflict
+ * with older SPLs).  We have our BSS be placed 2MiB after this, to allow for
+ * the default Linux kernel address of 0x80008000 to work with most sized
+ * kernels, in the Falcon Mode case.  We have the SPL malloc pool at the end
+ * of the BSS area.  We suggest that the stack be placed at 32MiB after the
+ * start of DRAM to allow room for all of the above (handled in Kconfig).
  */
 #ifndef CONFIG_SYS_TEXT_BASE
 #define CONFIG_SYS_TEXT_BASE		0x80800000
@@ -233,6 +233,11 @@
 					 CONFIG_SPL_BSS_MAX_SIZE)
 #define CONFIG_SYS_SPL_MALLOC_SIZE	CONFIG_SYS_MALLOC_LEN
 #endif
+#ifndef CONFIG_SPL_MAX_SIZE
+#define CONFIG_SPL_MAX_SIZE		(SRAM_SCRATCH_SPACE_ADDR - \
+					 CONFIG_SPL_TEXT_BASE)
+#endif
+
 
 /* RAW SD card / eMMC locations. */
 #define CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR	0x300 /* address 0x60000 */