omap: spl: fix build break due to changes in FAT

FAT library now uses malloc() and free(). But SPL doesn't
have heap until now. Setup a heap in SDRAM to fix this issue.

However this increases SPL footprint beyond the available SRAM
budget. So, compile out some fancy features in the SDARM init
bring back footprint under control

CC: Sandeep Paulraj <s-paulraj@ti.com>
CC: Wolfgang Denk <wd@denx.de>
Signed-off-by: Aneesh V <aneesh@ti.com>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>

arch/arm/cpu/armv7/omap-common/spl.c

@@ -34,6 +34,7 @@
 #include <asm/arch/mmc_host_def.h>
 #include <i2c.h>
 #include <image.h>
+#include <malloc.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -105,6 +106,9 @@ void board_init_r(gd_t *id, ulong dummy)
 	u32 boot_device;
 	debug(">>spl:board_init_r()\n");
 
+	mem_malloc_init(CONFIG_SYS_SPL_MALLOC_START,
+			CONFIG_SYS_SPL_MALLOC_SIZE);
+
 	timer_init();
 	i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
 

common/Makefile

@@ -187,6 +187,7 @@ COBJS-$(CONFIG_USB_KEYBOARD) += usb_kbd.o
 endif
 
 COBJS-y += console.o
+COBJS-y += dlmalloc.o
 COBJS-y += memsize.o
 COBJS-y += stdio.o
 

include/configs/omap4_common.h

@@ -253,6 +253,16 @@
 
 #define CONFIG_SPL_BSS_START_ADDR	0x80000000
 #define CONFIG_SPL_BSS_MAX_SIZE		0x80000		/* 512 KB */
+/*
+ * 1MB into the SDRAM to allow for SPL's bss at the beginning of SDRAM
+ * 64 bytes before this address should be set aside for u-boot.img's
+ * header. That is 0x800FFFC0--0x80100000 should not be used for any
+ * other needs.
+ */
+#define CONFIG_SYS_TEXT_BASE		0x80100000
+#define CONFIG_SYS_SPL_MALLOC_START	0x80200000
+#define CONFIG_SYS_SPL_MALLOC_SIZE	0x100000	/* 1 MB */
+
 
 #define CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR	0x300 /* address 0x60000 */
 #define CONFIG_SYS_U_BOOT_MAX_SIZE_SECTORS	0x200 /* 256 KB */
@@ -268,12 +278,4 @@
 #define CONFIG_SPL_SERIAL_SUPPORT
 #define CONFIG_SPL_LDSCRIPT "arch/arm/cpu/armv7/omap-common/u-boot-spl.lds"
 
-/*
- * 1MB into the SDRAM to allow for SPL's bss at the beginning of SDRAM
- * 64 bytes before this address should be set aside for u-boot.img's
- * header. That is 0x800FFFC0--0x80100000 should not be used for any
- * other needs.
- */
-#define CONFIG_SYS_TEXT_BASE		0x80100000
-
 #endif /* __CONFIG_OMAP4_COMMON_H */